Initial commit

module/jni/libcxx/test/std/strings/string.view/char.bad.fail.cpp

@@ -0,0 +1,56 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+//   ... manipulating sequences of any non-array trivial standard-layout types.
+
+#include <string>
+#include "../basic.string/test_traits.h"
+
+struct NotTrivial {
+    NotTrivial() : value(3) {}
+    int value;
+};
+
+struct NotStandardLayout {
+public:
+    NotStandardLayout() : one(1), two(2) {}
+    int sum() const { return one + two; } // silences "unused field 'two' warning"
+    int one;
+private:
+    int two;
+};
+
+int main(int, char**)
+{
+    {
+//  array
+    typedef char C[3];
+    static_assert(std::is_array<C>::value, "");
+    std::basic_string_view<C, test_traits<C> > sv;
+//  expected-error-re@string_view:* {{{{(static_assert|static assertion)}} failed{{.*}}Character type of basic_string_view must not be an array}}
+    }
+
+    {
+//  not trivial
+    static_assert(!std::is_trivial<NotTrivial>::value, "");
+    std::basic_string_view<NotTrivial, test_traits<NotTrivial> > sv;
+//  expected-error-re@string_view:* {{{{(static_assert|static assertion)}} failed{{.*}}Character type of basic_string_view must be trivial}}
+    }
+
+    {
+//  not standard layout
+    static_assert(!std::is_standard_layout<NotStandardLayout>::value, "");
+    std::basic_string_view<NotStandardLayout, test_traits<NotStandardLayout> > sv;
+//  expected-error-re@string_view:* {{{{(static_assert|static assertion)}} failed{{.*}}Character type of basic_string_view must be standard-layout}}
+    }
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/enable_borrowed_range.compile.pass.cpp

@@ -0,0 +1,26 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+
+// <string_view>
+
+// template<class charT, class traits>
+// inline constexpr bool ranges::enable_borrowed_range<
+//     basic_string_view<charT, traits>> = true;
+
+#include <string_view>
+
+#include "test_macros.h"
+
+void test() {
+  using std::ranges::enable_borrowed_range;
+  static_assert(enable_borrowed_range<std::basic_string_view<char> >);
+  static_assert(enable_borrowed_range<std::basic_string_view<wchar_t> >);
+  static_assert(enable_borrowed_range<std::basic_string_view<char8_t> >);
+}

module/jni/libcxx/test/std/strings/string.view/range_concept_conformance.compile.pass.cpp

@@ -0,0 +1,37 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
+
+// string_view
+
+#include <string_view>
+
+#include <concepts>
+#include <ranges>
+
+
+
+static_assert(std::same_as<std::ranges::iterator_t<std::string_view>, std::string_view::iterator>);
+static_assert(std::ranges::common_range<std::string_view>);
+static_assert(std::ranges::random_access_range<std::string_view>);
+static_assert(std::ranges::contiguous_range<std::string_view>);
+static_assert(std::ranges::view<std::string_view> && std::ranges::enable_view<std::string_view>);
+static_assert(std::ranges::sized_range<std::string_view>);
+static_assert(std::ranges::borrowed_range<std::string_view>);
+static_assert(std::ranges::viewable_range<std::string_view>);
+
+static_assert(std::same_as<std::ranges::iterator_t<std::string_view const>, std::string_view::const_iterator>);
+static_assert(std::ranges::common_range<std::string_view const>);
+static_assert(std::ranges::random_access_range<std::string_view const>);
+static_assert(std::ranges::contiguous_range<std::string_view const>);
+static_assert(!std::ranges::view<std::string_view const> && !std::ranges::enable_view<std::string_view const>);
+static_assert(std::ranges::sized_range<std::string_view const>);
+static_assert(std::ranges::borrowed_range<std::string_view const>);
+static_assert(std::ranges::viewable_range<std::string_view const>);

module/jni/libcxx/test/std/strings/string.view/string.view.access/at.pass.cpp

@@ -0,0 +1,59 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// <string_view>
+
+// constexpr const _CharT& at(size_type _pos) const;
+
+#include <string_view>
+#include <stdexcept>
+#include <cassert>
+
+#include "test_macros.h"
+
+template <typename CharT>
+void test ( const CharT *s, size_t len ) {
+    std::basic_string_view<CharT> sv ( s, len );
+    assert ( sv.length() == len );
+    for ( size_t i = 0; i < len; ++i ) {
+        assert (  sv.at(i) == s[i] );
+        assert ( &sv.at(i) == s + i );
+    }
+
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    try { (void)sv.at(len); } catch ( const std::out_of_range & ) { return ; }
+    assert ( false );
+#endif
+}
+
+int main(int, char**) {
+    test ( "ABCDE", 5 );
+    test ( "a", 1 );
+
+    test ( L"ABCDE", 5 );
+    test ( L"a", 1 );
+
+#if TEST_STD_VER >= 11
+    test ( u"ABCDE", 5 );
+    test ( u"a", 1 );
+
+    test ( U"ABCDE", 5 );
+    test ( U"a", 1 );
+#endif
+
+#if TEST_STD_VER >= 11
+    {
+    constexpr std::basic_string_view<char> sv ( "ABC", 2 );
+    static_assert ( sv.length() ==  2,  "" );
+    static_assert ( sv.at(0) == 'A', "" );
+    static_assert ( sv.at(1) == 'B', "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.access/back.pass.cpp

@@ -0,0 +1,55 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// constexpr const _CharT& front();
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+
+template <typename CharT>
+bool test ( const CharT *s, size_t len ) {
+    typedef std::basic_string_view<CharT> SV;
+    SV sv ( s, len );
+    ASSERT_SAME_TYPE(decltype(sv.back()), typename SV::const_reference);
+    LIBCPP_ASSERT_NOEXCEPT(   sv.back());
+    assert ( sv.length() == len );
+    assert ( sv.back() == s[len-1] );
+    return &sv.back() == s + len - 1;
+    }
+
+int main(int, char**) {
+    assert ( test ( "ABCDE", 5 ));
+    assert ( test ( "a", 1 ));
+
+    assert ( test ( L"ABCDE", 5 ));
+    assert ( test ( L"a", 1 ));
+
+#if TEST_STD_VER >= 11
+    assert ( test ( u"ABCDE", 5 ));
+    assert ( test ( u"a", 1 ));
+
+    assert ( test ( U"ABCDE", 5 ));
+    assert ( test ( U"a", 1 ));
+#endif
+
+#if TEST_STD_VER >= 11
+    {
+    constexpr std::basic_string_view<char> sv ( "ABC", 2 );
+    static_assert ( sv.length() ==  2,  "" );
+    static_assert ( sv.back()  == 'B', "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.access/data.pass.cpp

@@ -0,0 +1,57 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// constexpr const _CharT* data() const noexcept;
+
+#include <string_view>
+#include <cassert>
+#include <iterator>
+
+#include "test_macros.h"
+
+template <typename CharT>
+void test ( const CharT *s, size_t len ) {
+    std::basic_string_view<CharT> sv ( s, len );
+    assert ( sv.length() == len );
+    assert ( sv.data() == s );
+#if TEST_STD_VER > 14
+//  make sure we pick up std::data, too!
+    assert ( sv.data() == std::data(sv));
+#endif
+    }
+
+int main(int, char**) {
+    test ( "ABCDE", 5 );
+    test ( "a", 1 );
+
+    test ( L"ABCDE", 5 );
+    test ( L"a", 1 );
+
+#if TEST_STD_VER >= 11
+    test ( u"ABCDE", 5 );
+    test ( u"a", 1 );
+
+    test ( U"ABCDE", 5 );
+    test ( U"a", 1 );
+#endif
+
+#if TEST_STD_VER > 11
+    {
+    constexpr const char *s = "ABC";
+    constexpr std::basic_string_view<char> sv( s, 2 );
+    static_assert( sv.length() ==  2,  "" );
+    static_assert( sv.data() == s, "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.access/front.pass.cpp

@@ -0,0 +1,55 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// constexpr const _CharT& back();
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+
+template <typename CharT>
+bool test ( const CharT *s, size_t len ) {
+    typedef std::basic_string_view<CharT> SV;
+    SV sv ( s, len );
+    ASSERT_SAME_TYPE(decltype(sv.front()), typename SV::const_reference);
+    LIBCPP_ASSERT_NOEXCEPT(   sv.front());
+    assert ( sv.length() == len );
+    assert ( sv.front() == s[0] );
+    return &sv.front() == s;
+    }
+
+int main(int, char**) {
+    assert ( test ( "ABCDE", 5 ));
+    assert ( test ( "a", 1 ));
+
+    assert ( test ( L"ABCDE", 5 ));
+    assert ( test ( L"a", 1 ));
+
+#if TEST_STD_VER >= 11
+    assert ( test ( u"ABCDE", 5 ));
+    assert ( test ( u"a", 1 ));
+
+    assert ( test ( U"ABCDE", 5 ));
+    assert ( test ( U"a", 1 ));
+#endif
+
+#if TEST_STD_VER >= 11
+    {
+    constexpr std::basic_string_view<char> sv ( "ABC", 2 );
+    static_assert ( sv.length() ==  2,  "" );
+    static_assert ( sv.front()  == 'A', "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.access/index.pass.cpp

@@ -0,0 +1,58 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// constexpr const _CharT& operator[](size_type _pos) const;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+
+template <typename CharT>
+void test ( const CharT *s, size_t len ) {
+    typedef std::basic_string_view<CharT> SV;
+    SV sv ( s, len );
+    ASSERT_SAME_TYPE(decltype(sv[0]), typename SV::const_reference);
+    LIBCPP_ASSERT_NOEXCEPT(   sv[0]);
+    assert ( sv.length() == len );
+    for ( size_t i = 0; i < len; ++i ) {
+        assert ( sv[i] == s[i] );
+        assert ( &sv[i] == s + i );
+        }
+    }
+
+int main(int, char**) {
+    test ( "ABCDE", 5 );
+    test ( "a", 1 );
+
+    test ( L"ABCDE", 5 );
+    test ( L"a", 1 );
+
+#if TEST_STD_VER >= 11
+    test ( u"ABCDE", 5 );
+    test ( u"a", 1 );
+
+    test ( U"ABCDE", 5 );
+    test ( U"a", 1 );
+#endif
+
+#if TEST_STD_VER > 11
+    {
+    constexpr std::basic_string_view<char> sv ( "ABC", 2 );
+    static_assert ( sv.length() ==  2,  "" );
+    static_assert ( sv[0]  == 'A', "" );
+    static_assert ( sv[1]  == 'B', "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.capacity/capacity.pass.cpp

@@ -0,0 +1,121 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// [string.view.capacity], capacity
+// constexpr size_type size()     const noexcept;
+// constexpr size_type length()   const noexcept;
+// constexpr size_type max_size() const noexcept;
+// constexpr bool empty()         const noexcept;
+
+#include <string_view>
+#include <cassert>
+#include <iterator>
+#include <limits>
+
+#include "test_macros.h"
+
+template<typename SV>
+void test1 () {
+#if TEST_STD_VER > 11
+    {
+    constexpr SV sv1;
+    static_assert ( sv1.size() == 0, "" );
+    static_assert ( sv1.empty(), "");
+    static_assert ( sv1.size() == sv1.length(), "" );
+    static_assert ( sv1.max_size() > sv1.size(), "");
+    }
+#endif
+
+    {
+    SV sv1;
+    ASSERT_NOEXCEPT(sv1.size());
+    ASSERT_NOEXCEPT(sv1.empty());
+    ASSERT_NOEXCEPT(sv1.max_size());
+    ASSERT_NOEXCEPT(sv1.length());
+    assert ( sv1.size() == 0 );
+    assert ( sv1.empty());
+    assert ( sv1.size() == sv1.length());
+    assert ( sv1.max_size() > sv1.size());
+    }
+
+    // Sanity check max_size() -- a string_view can't store more bytes than a single object
+    // can contain. Any implementation that fails this check is certainly lying.
+    {
+        typedef typename SV::value_type CharT;
+        typedef typename SV::size_type Size;
+        SV sv;
+        assert(sv.max_size() <= std::numeric_limits<Size>::max() / sizeof(CharT));
+        LIBCPP_ASSERT(sv.max_size() == std::numeric_limits<Size>::max() / sizeof(CharT));
+    }
+}
+
+template<typename CharT>
+void test2 ( const CharT *s, size_t len ) {
+    {
+    std::basic_string_view<CharT> sv1 ( s );
+    assert ( sv1.size() == len );
+    assert ( sv1.data() == s );
+    assert ( sv1.empty() == (len == 0));
+    assert ( sv1.size() == sv1.length());
+    assert ( sv1.max_size() > sv1.size());
+#if TEST_STD_VER > 14
+//  make sure we pick up std::size, too!
+    assert ( sv1.size() == std::size(sv1));
+    assert ( sv1.empty() == std::empty(sv1));
+#endif
+    }
+}
+
+int main(int, char**) {
+    test1<std::string_view> ();
+#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
+    test1<std::u8string_view> ();
+#endif
+    test1<std::u16string_view> ();
+    test1<std::u32string_view> ();
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    test1<std::wstring_view> ();
+#endif
+
+    test2 ( "ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE", 105 );
+    test2 ( "ABCDE", 5 );
+    test2 ( "a", 1 );
+    test2 ( "", 0 );
+
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    test2 ( L"ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE", 105 );
+    test2 ( L"ABCDE", 5 );
+    test2 ( L"a", 1 );
+    test2 ( L"", 0 );
+#endif
+
+#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
+    test2 ( u8"ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE", 105 );
+    test2 ( u8"ABCDE", 5 );
+    test2 ( u8"a", 1 );
+    test2 ( u8"", 0 );
+#endif
+
+#if TEST_STD_VER >= 11
+    test2 ( u"ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE", 105 );
+    test2 ( u"ABCDE", 5 );
+    test2 ( u"a", 1 );
+    test2 ( u"", 0 );
+
+    test2 ( U"ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE", 105 );
+    test2 ( U"ABCDE", 5 );
+    test2 ( U"a", 1 );
+    test2 ( U"", 0 );
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.capacity/empty.verify.cpp

@@ -0,0 +1,27 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// <string_view>
+
+// class string_view
+
+// bool empty() const noexcept;
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+
+#include <string_view>
+
+#include "test_macros.h"
+
+int main(int, char**)
+{
+    std::string_view c;
+    c.empty();  // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
+
+    return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.comparison/equal.pass.cpp

@@ -0,0 +1,116 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// template<class charT, class traits>
+//   constexpr bool operator==(basic_string_view<charT, traits> lhs, basic_string_view<charT, traits> rhs);
+// (plus "sufficient additional overloads" to make implicit conversions work as intended)
+
+#include <string_view>
+#include <cassert>
+#include <string>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+#include "make_string.h"
+
+template<class T>
+struct ConvertibleTo {
+    T t_;
+    TEST_CONSTEXPR explicit ConvertibleTo(T t) : t_(t) {}
+    TEST_CONSTEXPR operator T() const {
+        return t_;
+    }
+};
+
+template<class SV>
+TEST_CONSTEXPR_CXX14 bool test()
+{
+    typedef typename SV::value_type CharT;
+    typedef typename SV::traits_type Traits;
+
+    // Test the behavior of the operator, both with and without implicit conversions.
+    SV v[] = {
+        SV(MAKE_CSTRING(CharT, "")),
+        SV(MAKE_CSTRING(CharT, "abc")),
+        SV(MAKE_CSTRING(CharT, "abcdef")),
+        SV(MAKE_CSTRING(CharT, "acb")),
+    };
+    for (int i = 0; i < 4; ++i) {
+        for (int j = 0; j < 4; ++j) {
+            // See http://eel.is/c++draft/string.view#tab:string.view.comparison.overloads
+            bool expected = (i == j);
+            assert((v[i] == v[j]) == expected);
+            assert((v[i].data() == v[j]) == expected);
+            assert((v[i] == v[j].data()) == expected);
+            assert((ConvertibleTo<SV>(v[i]) == v[j]) == expected);
+            assert((v[i] == ConvertibleTo<SV>(v[j])) == expected);
+
+            if (!TEST_IS_CONSTANT_EVALUATED || TEST_STD_VER >= 20) {
+                assert((std::basic_string<CharT, Traits>(v[i]) == v[j]) == expected);
+                assert((v[i] == std::basic_string<CharT, Traits>(v[j])) == expected);
+            }
+        }
+    }
+
+    // Test its behavior with embedded null bytes.
+    SV abc = SV(MAKE_CSTRING(CharT, "abc"));
+    SV abc0def = SV(MAKE_CSTRING(CharT, "abc\0def"), 7);
+    SV abcdef = SV(MAKE_CSTRING(CharT, "abcdef"));
+    assert((abc == abc0def) == false);
+    assert((abc == abcdef) == false);
+    assert((abc0def == abc) == false);
+    assert((abc0def == abcdef) == false);
+    assert((abcdef == abc) == false);
+    assert((abcdef == abc0def) == false);
+
+    assert((abc.data() == abc0def) == false);
+    assert((abc0def == abc.data()) == false);
+
+    if (!TEST_IS_CONSTANT_EVALUATED || TEST_STD_VER >= 20) {
+        assert((std::basic_string<CharT, Traits>(abc) == abc0def) == false);
+        assert((abc0def == std::basic_string<CharT, Traits>(abc)) == false);
+    }
+
+    return true;
+}
+
+int main(int, char**)
+{
+    test<std::string_view>();
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    test<std::wstring_view>();
+#endif
+#if TEST_STD_VER >= 11
+    test<std::u16string_view>();
+    test<std::u32string_view>();
+#endif
+#if TEST_STD_VER > 14
+    static_assert(test<std::string_view>(), "");
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    static_assert(test<std::wstring_view>(), "");
+#endif
+    static_assert(test<std::u16string_view>(), "");
+    static_assert(test<std::u32string_view>(), "");
+#endif
+
+#if TEST_STD_VER > 11
+    test<std::basic_string_view<char, constexpr_char_traits<char>>>();
+    static_assert(test<std::basic_string_view<char, constexpr_char_traits<char>>>(), "");
+#endif
+
+#if TEST_STD_VER > 17
+    test<std::u8string_view>();
+    static_assert(test<std::u8string_view>());
+#endif
+
+    return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.comparison/greater.pass.cpp

@@ -0,0 +1,116 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// template<class charT, class traits>
+//   constexpr bool operator>(basic_string_view<charT, traits> lhs, basic_string_view<charT, traits> rhs);
+// (plus "sufficient additional overloads" to make implicit conversions work as intended)
+
+#include <string_view>
+#include <cassert>
+#include <string>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+#include "make_string.h"
+
+template<class T>
+struct ConvertibleTo {
+    T t_;
+    TEST_CONSTEXPR explicit ConvertibleTo(T t) : t_(t) {}
+    TEST_CONSTEXPR operator T() const {
+        return t_;
+    }
+};
+
+template<class SV>
+TEST_CONSTEXPR_CXX14 bool test()
+{
+    typedef typename SV::value_type CharT;
+    typedef typename SV::traits_type Traits;
+
+    // Test the behavior of the operator, both with and without implicit conversions.
+    SV v[] = {
+        SV(MAKE_CSTRING(CharT, "")),
+        SV(MAKE_CSTRING(CharT, "abc")),
+        SV(MAKE_CSTRING(CharT, "abcdef")),
+        SV(MAKE_CSTRING(CharT, "acb")),
+    };
+    for (int i = 0; i < 4; ++i) {
+        for (int j = 0; j < 4; ++j) {
+            // See http://eel.is/c++draft/string.view#tab:string.view.comparison.overloads
+            bool expected = (i > j);
+            assert((v[i] > v[j]) == expected);
+            assert((v[i].data() > v[j]) == expected);
+            assert((v[i] > v[j].data()) == expected);
+            assert((ConvertibleTo<SV>(v[i]) > v[j]) == expected);
+            assert((v[i] > ConvertibleTo<SV>(v[j])) == expected);
+
+            if (!TEST_IS_CONSTANT_EVALUATED || TEST_STD_VER >= 20) {
+                assert((std::basic_string<CharT, Traits>(v[i]) > v[j]) == expected);
+                assert((v[i] > std::basic_string<CharT, Traits>(v[j])) == expected);
+            }
+        }
+    }
+
+    // Test its behavior with embedded null bytes.
+    SV abc = SV(MAKE_CSTRING(CharT, "abc"));
+    SV abc0def = SV(MAKE_CSTRING(CharT, "abc\0def"), 7);
+    SV abcdef = SV(MAKE_CSTRING(CharT, "abcdef"));
+    assert((abc > abc0def) == false);
+    assert((abc > abcdef) == false);
+    assert((abc0def > abc) == true);
+    assert((abc0def > abcdef) == false);
+    assert((abcdef > abc) == true);
+    assert((abcdef > abc0def) == true);
+
+    assert((abc.data() > abc0def) == false);
+    assert((abc0def > abc.data()) == true);
+
+    if (!TEST_IS_CONSTANT_EVALUATED || TEST_STD_VER >= 20) {
+        assert((std::basic_string<CharT, Traits>(abc) > abc0def) == false);
+        assert((abc0def > std::basic_string<CharT, Traits>(abc)) == true);
+    }
+
+    return true;
+}
+
+int main(int, char**)
+{
+    test<std::string_view>();
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    test<std::wstring_view>();
+#endif
+#if TEST_STD_VER >= 11
+    test<std::u16string_view>();
+    test<std::u32string_view>();
+#endif
+#if TEST_STD_VER > 14
+    static_assert(test<std::string_view>(), "");
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    static_assert(test<std::wstring_view>(), "");
+#endif
+    static_assert(test<std::u16string_view>(), "");
+    static_assert(test<std::u32string_view>(), "");
+#endif
+
+#if TEST_STD_VER > 11
+    test<std::basic_string_view<char, constexpr_char_traits<char>>>();
+    static_assert(test<std::basic_string_view<char, constexpr_char_traits<char>>>(), "");
+#endif
+
+#if TEST_STD_VER > 17
+    test<std::u8string_view>();
+    static_assert(test<std::u8string_view>());
+#endif
+
+    return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.comparison/greater_equal.pass.cpp

@@ -0,0 +1,116 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// template<class charT, class traits>
+//   constexpr bool operator>=(basic_string_view<charT, traits> lhs, basic_string_view<charT, traits> rhs);
+// (plus "sufficient additional overloads" to make implicit conversions work as intended)
+
+#include <string_view>
+#include <cassert>
+#include <string>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+#include "make_string.h"
+
+template<class T>
+struct ConvertibleTo {
+    T t_;
+    TEST_CONSTEXPR explicit ConvertibleTo(T t) : t_(t) {}
+    TEST_CONSTEXPR operator T() const {
+        return t_;
+    }
+};
+
+template<class SV>
+TEST_CONSTEXPR_CXX14 bool test()
+{
+    typedef typename SV::value_type CharT;
+    typedef typename SV::traits_type Traits;
+
+    // Test the behavior of the operator, both with and without implicit conversions.
+    SV v[] = {
+        SV(MAKE_CSTRING(CharT, "")),
+        SV(MAKE_CSTRING(CharT, "abc")),
+        SV(MAKE_CSTRING(CharT, "abcdef")),
+        SV(MAKE_CSTRING(CharT, "acb")),
+    };
+    for (int i = 0; i < 4; ++i) {
+        for (int j = 0; j < 4; ++j) {
+            // See http://eel.is/c++draft/string.view#tab:string.view.comparison.overloads
+            bool expected = (i >= j);
+            assert((v[i] >= v[j]) == expected);
+            assert((v[i].data() >= v[j]) == expected);
+            assert((v[i] >= v[j].data()) == expected);
+            assert((ConvertibleTo<SV>(v[i]) >= v[j]) == expected);
+            assert((v[i] >= ConvertibleTo<SV>(v[j])) == expected);
+
+            if (!TEST_IS_CONSTANT_EVALUATED || TEST_STD_VER >= 20) {
+                assert((std::basic_string<CharT, Traits>(v[i]) >= v[j]) == expected);
+                assert((v[i] >= std::basic_string<CharT, Traits>(v[j])) == expected);
+            }
+        }
+    }
+
+    // Test its behavior with embedded null bytes.
+    SV abc = SV(MAKE_CSTRING(CharT, "abc"));
+    SV abc0def = SV(MAKE_CSTRING(CharT, "abc\0def"), 7);
+    SV abcdef = SV(MAKE_CSTRING(CharT, "abcdef"));
+    assert((abc >= abc0def) == false);
+    assert((abc >= abcdef) == false);
+    assert((abc0def >= abc) == true);
+    assert((abc0def >= abcdef) == false);
+    assert((abcdef >= abc) == true);
+    assert((abcdef >= abc0def) == true);
+
+    assert((abc.data() >= abc0def) == false);
+    assert((abc0def >= abc.data()) == true);
+
+    if (!TEST_IS_CONSTANT_EVALUATED || TEST_STD_VER >= 20) {
+        assert((std::basic_string<CharT, Traits>(abc) >= abc0def) == false);
+        assert((abc0def >= std::basic_string<CharT, Traits>(abc)) == true);
+    }
+
+    return true;
+}
+
+int main(int, char**)
+{
+    test<std::string_view>();
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    test<std::wstring_view>();
+#endif
+#if TEST_STD_VER >= 11
+    test<std::u16string_view>();
+    test<std::u32string_view>();
+#endif
+#if TEST_STD_VER > 14
+    static_assert(test<std::string_view>(), "");
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    static_assert(test<std::wstring_view>(), "");
+#endif
+    static_assert(test<std::u16string_view>(), "");
+    static_assert(test<std::u32string_view>(), "");
+#endif
+
+#if TEST_STD_VER > 11
+    test<std::basic_string_view<char, constexpr_char_traits<char>>>();
+    static_assert(test<std::basic_string_view<char, constexpr_char_traits<char>>>(), "");
+#endif
+
+#if TEST_STD_VER > 17
+    test<std::u8string_view>();
+    static_assert(test<std::u8string_view>());
+#endif
+
+    return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.comparison/less.pass.cpp

@@ -0,0 +1,116 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// template<class charT, class traits>
+//   constexpr bool operator<(basic_string_view<charT, traits> lhs, basic_string_view<charT, traits> rhs);
+// (plus "sufficient additional overloads" to make implicit conversions work as intended)
+
+#include <string_view>
+#include <cassert>
+#include <string>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+#include "make_string.h"
+
+template<class T>
+struct ConvertibleTo {
+    T t_;
+    TEST_CONSTEXPR explicit ConvertibleTo(T t) : t_(t) {}
+    TEST_CONSTEXPR operator T() const {
+        return t_;
+    }
+};
+
+template<class SV>
+TEST_CONSTEXPR_CXX14 bool test()
+{
+    typedef typename SV::value_type CharT;
+    typedef typename SV::traits_type Traits;
+
+    // Test the behavior of the operator, both with and without implicit conversions.
+    SV v[] = {
+        SV(MAKE_CSTRING(CharT, "")),
+        SV(MAKE_CSTRING(CharT, "abc")),
+        SV(MAKE_CSTRING(CharT, "abcdef")),
+        SV(MAKE_CSTRING(CharT, "acb")),
+    };
+    for (int i = 0; i < 4; ++i) {
+        for (int j = 0; j < 4; ++j) {
+            // See http://eel.is/c++draft/string.view#tab:string.view.comparison.overloads
+            bool expected = (i < j);
+            assert((v[i] < v[j]) == expected);
+            assert((v[i].data() < v[j]) == expected);
+            assert((v[i] < v[j].data()) == expected);
+            assert((ConvertibleTo<SV>(v[i]) < v[j]) == expected);
+            assert((v[i] < ConvertibleTo<SV>(v[j])) == expected);
+
+            if (!TEST_IS_CONSTANT_EVALUATED || TEST_STD_VER >= 20) {
+                assert((std::basic_string<CharT, Traits>(v[i]) < v[j]) == expected);
+                assert((v[i] < std::basic_string<CharT, Traits>(v[j])) == expected);
+            }
+        }
+    }
+
+    // Test its behavior with embedded null bytes.
+    SV abc = SV(MAKE_CSTRING(CharT, "abc"));
+    SV abc0def = SV(MAKE_CSTRING(CharT, "abc\0def"), 7);
+    SV abcdef = SV(MAKE_CSTRING(CharT, "abcdef"));
+    assert((abc < abc0def) == true);
+    assert((abc < abcdef) == true);
+    assert((abc0def < abc) == false);
+    assert((abc0def < abcdef) == true);
+    assert((abcdef < abc) == false);
+    assert((abcdef < abc0def) == false);
+
+    assert((abc.data() < abc0def) == true);
+    assert((abc0def < abc.data()) == false);
+
+    if (!TEST_IS_CONSTANT_EVALUATED || TEST_STD_VER >= 20) {
+        assert((std::basic_string<CharT, Traits>(abc) < abc0def) == true);
+        assert((abc0def < std::basic_string<CharT, Traits>(abc)) == false);
+    }
+
+    return true;
+}
+
+int main(int, char**)
+{
+    test<std::string_view>();
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    test<std::wstring_view>();
+#endif
+#if TEST_STD_VER >= 11
+    test<std::u16string_view>();
+    test<std::u32string_view>();
+#endif
+#if TEST_STD_VER > 14
+    static_assert(test<std::string_view>(), "");
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    static_assert(test<std::wstring_view>(), "");
+#endif
+    static_assert(test<std::u16string_view>(), "");
+    static_assert(test<std::u32string_view>(), "");
+#endif
+
+#if TEST_STD_VER > 11
+    test<std::basic_string_view<char, constexpr_char_traits<char>>>();
+    static_assert(test<std::basic_string_view<char, constexpr_char_traits<char>>>(), "");
+#endif
+
+#if TEST_STD_VER > 17
+    test<std::u8string_view>();
+    static_assert(test<std::u8string_view>());
+#endif
+
+    return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.comparison/less_equal.pass.cpp

@@ -0,0 +1,116 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// template<class charT, class traits>
+//   constexpr bool operator<=(basic_string_view<charT, traits> lhs, basic_string_view<charT, traits> rhs);
+// (plus "sufficient additional overloads" to make implicit conversions work as intended)
+
+#include <string_view>
+#include <cassert>
+#include <string>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+#include "make_string.h"
+
+template<class T>
+struct ConvertibleTo {
+    T t_;
+    TEST_CONSTEXPR explicit ConvertibleTo(T t) : t_(t) {}
+    TEST_CONSTEXPR operator T() const {
+        return t_;
+    }
+};
+
+template<class SV>
+TEST_CONSTEXPR_CXX14 bool test()
+{
+    typedef typename SV::value_type CharT;
+    typedef typename SV::traits_type Traits;
+
+    // Test the behavior of the operator, both with and without implicit conversions.
+    SV v[] = {
+        SV(MAKE_CSTRING(CharT, "")),
+        SV(MAKE_CSTRING(CharT, "abc")),
+        SV(MAKE_CSTRING(CharT, "abcdef")),
+        SV(MAKE_CSTRING(CharT, "acb")),
+    };
+    for (int i = 0; i < 4; ++i) {
+        for (int j = 0; j < 4; ++j) {
+            // See http://eel.is/c++draft/string.view#tab:string.view.comparison.overloads
+            bool expected = (i <= j);
+            assert((v[i] <= v[j]) == expected);
+            assert((v[i].data() <= v[j]) == expected);
+            assert((v[i] <= v[j].data()) == expected);
+            assert((ConvertibleTo<SV>(v[i]) <= v[j]) == expected);
+            assert((v[i] <= ConvertibleTo<SV>(v[j])) == expected);
+
+            if (!TEST_IS_CONSTANT_EVALUATED || TEST_STD_VER >= 20) {
+                assert((std::basic_string<CharT, Traits>(v[i]) <= v[j]) == expected);
+                assert((v[i] <= std::basic_string<CharT, Traits>(v[j])) == expected);
+            }
+        }
+    }
+
+    // Test its behavior with embedded null bytes.
+    SV abc = SV(MAKE_CSTRING(CharT, "abc"));
+    SV abc0def = SV(MAKE_CSTRING(CharT, "abc\0def"), 7);
+    SV abcdef = SV(MAKE_CSTRING(CharT, "abcdef"));
+    assert((abc <= abc0def) == true);
+    assert((abc <= abcdef) == true);
+    assert((abc0def <= abc) == false);
+    assert((abc0def <= abcdef) == true);
+    assert((abcdef <= abc) == false);
+    assert((abcdef <= abc0def) == false);
+
+    assert((abc.data() <= abc0def) == true);
+    assert((abc0def <= abc.data()) == false);
+
+    if (!TEST_IS_CONSTANT_EVALUATED || TEST_STD_VER >= 20) {
+        assert((std::basic_string<CharT, Traits>(abc) <= abc0def) == true);
+        assert((abc0def <= std::basic_string<CharT, Traits>(abc)) == false);
+    }
+
+    return true;
+}
+
+int main(int, char**)
+{
+    test<std::string_view>();
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    test<std::wstring_view>();
+#endif
+#if TEST_STD_VER >= 11
+    test<std::u16string_view>();
+    test<std::u32string_view>();
+#endif
+#if TEST_STD_VER > 14
+    static_assert(test<std::string_view>(), "");
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    static_assert(test<std::wstring_view>(), "");
+#endif
+    static_assert(test<std::u16string_view>(), "");
+    static_assert(test<std::u32string_view>(), "");
+#endif
+
+#if TEST_STD_VER > 11
+    test<std::basic_string_view<char, constexpr_char_traits<char>>>();
+    static_assert(test<std::basic_string_view<char, constexpr_char_traits<char>>>(), "");
+#endif
+
+#if TEST_STD_VER > 17
+    test<std::u8string_view>();
+    static_assert(test<std::u8string_view>());
+#endif
+
+    return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.comparison/not_equal.pass.cpp

@@ -0,0 +1,116 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// template<class charT, class traits>
+//   constexpr bool operator!=(basic_string_view<charT, traits> lhs, basic_string_view<charT, traits> rhs);
+// (plus "sufficient additional overloads" to make implicit conversions work as intended)
+
+#include <string_view>
+#include <cassert>
+#include <string>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+#include "make_string.h"
+
+template<class T>
+struct ConvertibleTo {
+    T t_;
+    TEST_CONSTEXPR explicit ConvertibleTo(T t) : t_(t) {}
+    TEST_CONSTEXPR operator T() const {
+        return t_;
+    }
+};
+
+template<class SV>
+TEST_CONSTEXPR_CXX14 bool test()
+{
+    typedef typename SV::value_type CharT;
+    typedef typename SV::traits_type Traits;
+
+    // Test the behavior of the operator, both with and without implicit conversions.
+    SV v[] = {
+        SV(MAKE_CSTRING(CharT, "")),
+        SV(MAKE_CSTRING(CharT, "abc")),
+        SV(MAKE_CSTRING(CharT, "abcdef")),
+        SV(MAKE_CSTRING(CharT, "acb")),
+    };
+    for (int i = 0; i < 4; ++i) {
+        for (int j = 0; j < 4; ++j) {
+            // See http://eel.is/c++draft/string.view#tab:string.view.comparison.overloads
+            bool expected = (i != j);
+            assert((v[i] != v[j]) == expected);
+            assert((v[i].data() != v[j]) == expected);
+            assert((v[i] != v[j].data()) == expected);
+            assert((ConvertibleTo<SV>(v[i]) != v[j]) == expected);
+            assert((v[i] != ConvertibleTo<SV>(v[j])) == expected);
+
+            if (!TEST_IS_CONSTANT_EVALUATED || TEST_STD_VER >= 20) {
+                assert((std::basic_string<CharT, Traits>(v[i]) != v[j]) == expected);
+                assert((v[i] != std::basic_string<CharT, Traits>(v[j])) == expected);
+            }
+        }
+    }
+
+    // Test its behavior with embedded null bytes.
+    SV abc = SV(MAKE_CSTRING(CharT, "abc"));
+    SV abc0def = SV(MAKE_CSTRING(CharT, "abc\0def"), 7);
+    SV abcdef = SV(MAKE_CSTRING(CharT, "abcdef"));
+    assert((abc != abc0def) == true);
+    assert((abc != abcdef) == true);
+    assert((abc0def != abc) == true);
+    assert((abc0def != abcdef) == true);
+    assert((abcdef != abc) == true);
+    assert((abcdef != abc0def) == true);
+
+    assert((abc.data() != abc0def) == true);
+    assert((abc0def != abc.data()) == true);
+
+    if (!TEST_IS_CONSTANT_EVALUATED || TEST_STD_VER >= 20) {
+        assert((std::basic_string<CharT, Traits>(abc) != abc0def) == true);
+        assert((abc0def != std::basic_string<CharT, Traits>(abc)) == true);
+    }
+
+    return true;
+}
+
+int main(int, char**)
+{
+    test<std::string_view>();
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    test<std::wstring_view>();
+#endif
+#if TEST_STD_VER >= 11
+    test<std::u16string_view>();
+    test<std::u32string_view>();
+#endif
+#if TEST_STD_VER > 14
+    static_assert(test<std::string_view>(), "");
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    static_assert(test<std::wstring_view>(), "");
+#endif
+    static_assert(test<std::u16string_view>(), "");
+    static_assert(test<std::u32string_view>(), "");
+#endif
+
+#if TEST_STD_VER > 11
+    test<std::basic_string_view<char, constexpr_char_traits<char>>>();
+    static_assert(test<std::basic_string_view<char, constexpr_char_traits<char>>>(), "");
+#endif
+
+#if TEST_STD_VER > 17
+    test<std::u8string_view>();
+    static_assert(test<std::u8string_view>());
+#endif
+
+    return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.cons/assign.pass.cpp

@@ -0,0 +1,60 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// constexpr basic_string_view& operator=(const basic_string_view &) noexcept = default;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+
+template<typename T>
+#if TEST_STD_VER > 11
+constexpr
+#endif
+bool test (T sv0)
+    {
+    T sv1;
+    sv1 = sv0;
+//  We can't just say "sv0 == sv1" here because string_view::compare
+//  isn't constexpr until C++17, and we want to support back to C++14
+    return sv0.size() == sv1.size() && sv0.data() == sv1.data();
+    }
+
+int main(int, char**) {
+
+    assert( test<std::string_view>    (  "1234"));
+#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
+    assert( test<std::u8string_view>  (u8"1234"));
+#endif
+#if TEST_STD_VER >= 11
+    assert( test<std::u16string_view> ( u"1234"));
+    assert( test<std::u32string_view> ( U"1234"));
+#endif
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    assert( test<std::wstring_view>   ( L"1234"));
+#endif
+
+#if TEST_STD_VER > 11
+    static_assert( test<std::string_view>    ({  "abc", 3}), "");
+#   if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
+    static_assert( test<std::u8string_view>  ({u8"abc", 3}), "");
+#   endif
+    static_assert( test<std::u16string_view> ({ u"abc", 3}), "");
+    static_assert( test<std::u32string_view> ({ U"abc", 3}), "");
+#   ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    static_assert( test<std::wstring_view>   ({ L"abc", 3}), "");
+#   endif
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.cons/default.pass.cpp

@@ -0,0 +1,51 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// constexpr basic_string_view () noexcept;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+
+template<typename T>
+void test () {
+#if TEST_STD_VER > 11
+    {
+    ASSERT_NOEXCEPT(T());
+
+    constexpr T sv1;
+    static_assert ( sv1.size() == 0, "" );
+    static_assert ( sv1.empty(), "");
+    }
+#endif
+
+    {
+    T sv1;
+    assert ( sv1.size() == 0 );
+    assert ( sv1.empty());
+    }
+}
+
+int main(int, char**) {
+    test<std::string_view> ();
+    test<std::u16string_view> ();
+#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
+    test<std::u8string_view> ();
+#endif
+    test<std::u32string_view> ();
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    test<std::wstring_view> ();
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.cons/from_iterator_sentinel.pass.cpp

@@ -0,0 +1,98 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+
+// <string_view>
+
+//  template <class It, class End>
+//  constexpr basic_string_view(It begin, End end)
+
+#include <string_view>
+#include <cassert>
+#include <iterator>
+
+#include "make_string.h"
+#include "test_iterators.h"
+
+template<class It, class Sentinel, class CharT>
+constexpr void test_construction(std::basic_string_view<CharT> val) {
+  auto sv = std::basic_string_view<CharT>(It(val.data()), Sentinel(It(val.data() + val.size())));
+  assert(sv.data() == val.data());
+  assert(sv.size() == val.size());
+}
+
+template<class CharT>
+constexpr void test_with_char() {
+  const auto val = MAKE_STRING_VIEW(CharT, "test");
+  test_construction<CharT*, CharT*>(val);
+  test_construction<CharT*, const CharT*>(val);
+  test_construction<const CharT*, CharT*>(val);
+  test_construction<const CharT*, sized_sentinel<const CharT*>>(val);
+  test_construction<contiguous_iterator<const CharT*>, contiguous_iterator<const CharT*>>(val);
+  test_construction<contiguous_iterator<const CharT*>, sized_sentinel<contiguous_iterator<const CharT*>>>(val);
+}
+
+constexpr bool test() {
+  test_with_char<char>();
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+  test_with_char<wchar_t>();
+#endif
+  test_with_char<char8_t>();
+  test_with_char<char16_t>();
+  test_with_char<char32_t>();
+
+  return true;
+}
+
+#ifndef TEST_HAS_NO_EXCEPTIONS
+template<class CharT>
+struct ThrowingSentinel {
+  friend bool operator==(const CharT*, ThrowingSentinel) noexcept { return true; }
+  friend std::iter_difference_t<const CharT*> operator-(const CharT*, ThrowingSentinel) noexcept { return {}; }
+  friend std::iter_difference_t<const CharT*> operator-(ThrowingSentinel, const CharT*) { throw 42; }
+};
+
+template <class CharT>
+void test_throwing() {
+  auto val = MAKE_STRING_VIEW(CharT, "test");
+  try {
+    (void)std::basic_string_view<CharT>(val.data(), ThrowingSentinel<CharT>());
+    assert(false);
+  } catch (int i) {
+    assert(i == 42);
+  }
+}
+
+void test_throwing() {
+  test_throwing<char>();
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+  test_throwing<wchar_t>();
+#endif
+  test_throwing<char8_t>();
+  test_throwing<char16_t>();
+  test_throwing<char32_t>();
+}
+#endif
+
+static_assert( std::is_constructible_v<std::string_view, const char*, char*>);
+static_assert( std::is_constructible_v<std::string_view, char*, const char*>);
+static_assert(!std::is_constructible_v<std::string_view, char*, void*>);               // not a sentinel
+static_assert(!std::is_constructible_v<std::string_view, signed char*, signed char*>); // wrong char type
+static_assert(!std::is_constructible_v<std::string_view, random_access_iterator<char*>, random_access_iterator<char*>>); // not contiguous
+static_assert( std::is_constructible_v<std::string_view, contiguous_iterator<char*>, contiguous_iterator<char*>>);
+
+int main(int, char**) {
+  test();
+  static_assert(test());
+
+#ifndef TEST_HAS_NO_EXCEPTIONS
+  test_throwing();
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.cons/from_literal.pass.cpp

@@ -0,0 +1,70 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// constexpr basic_string_view(const _CharT* _s)
+//    : __data (_s), __size(_Traits::length(_s)) {}
+
+#include <string_view>
+#include <string>
+#include <cassert>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+
+template<typename CharT>
+size_t StrLen ( const CharT *s ) {
+    size_t retVal = 0;
+    while ( *s != 0 ) { ++retVal; ++s; }
+    return retVal;
+    }
+
+template<typename CharT>
+void test ( const CharT *s ) {
+    typedef std::basic_string_view<CharT> SV;
+//  I'd love to do this, but it would require traits::length() to be noexcept
+//  LIBCPP_ASSERT_NOEXCEPT(SV(s));
+
+    SV sv1 ( s );
+    assert ( sv1.size() == StrLen( s ));
+    assert ( sv1.data() == s );
+    }
+
+
+int main(int, char**) {
+
+    test ( "QBCDE" );
+    test ( "A" );
+    test ( "" );
+
+    test ( L"QBCDE" );
+    test ( L"A" );
+    test ( L"" );
+
+#if TEST_STD_VER >= 11
+    test ( u"QBCDE" );
+    test ( u"A" );
+    test ( u"" );
+
+    test ( U"QBCDE" );
+    test ( U"A" );
+    test ( U"" );
+#endif
+
+#if TEST_STD_VER > 11
+    {
+    constexpr std::basic_string_view<char, constexpr_char_traits<char>> sv1 ( "ABCDE" );
+    static_assert ( sv1.size() == 5, "");
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.cons/from_ptr_len.pass.cpp

@@ -0,0 +1,87 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+//  constexpr basic_string_view(const _CharT* _s, size_type _len)
+//      : __data (_s), __size(_len) {}
+
+#include <string_view>
+#include <string>
+#include <cassert>
+
+#include "test_macros.h"
+
+template<typename CharT>
+void test ( const CharT *s, size_t sz ) {
+    {
+    typedef std::basic_string_view<CharT> SV;
+    LIBCPP_ASSERT_NOEXCEPT(SV(s, sz));
+
+    SV sv1 ( s, sz );
+    assert ( sv1.size() == sz );
+    assert ( sv1.data() == s );
+    }
+}
+
+int main(int, char**) {
+
+    test ( "QBCDE", 5 );
+    test ( "QBCDE", 2 );
+    test ( "", 0 );
+#if TEST_STD_VER > 11
+    {
+    constexpr const char *s = "QBCDE";
+    constexpr std::basic_string_view<char> sv1 ( s, 2 );
+    static_assert ( sv1.size() == 2, "" );
+    static_assert ( sv1.data() == s, "" );
+    }
+#endif
+
+    test ( L"QBCDE", 5 );
+    test ( L"QBCDE", 2 );
+    test ( L"", 0 );
+#if TEST_STD_VER > 11
+    {
+    constexpr const wchar_t *s = L"QBCDE";
+    constexpr std::basic_string_view<wchar_t> sv1 ( s, 2 );
+    static_assert ( sv1.size() == 2, "" );
+    static_assert ( sv1.data() == s, "" );
+    }
+#endif
+
+#if TEST_STD_VER >= 11
+    test ( u"QBCDE", 5 );
+    test ( u"QBCDE", 2 );
+    test ( u"", 0 );
+#if TEST_STD_VER > 11
+    {
+    constexpr const char16_t *s = u"QBCDE";
+    constexpr std::basic_string_view<char16_t> sv1 ( s, 2 );
+    static_assert ( sv1.size() == 2, "" );
+    static_assert ( sv1.data() == s, "" );
+    }
+#endif
+
+    test ( U"QBCDE", 5 );
+    test ( U"QBCDE", 2 );
+    test ( U"", 0 );
+#if TEST_STD_VER > 11
+    {
+    constexpr const char32_t *s = U"QBCDE";
+    constexpr std::basic_string_view<char32_t> sv1 ( s, 2 );
+    static_assert ( sv1.size() == 2, "" );
+    static_assert ( sv1.data() == s, "" );
+    }
+#endif
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.cons/from_range.pass.cpp

@@ -0,0 +1,198 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
+
+// <string_view>
+
+//  template <class Range>
+//  constexpr basic_string_view(Range&& range);
+
+#include <string_view>
+#include <array>
+#include <cassert>
+#include <iterator>
+#include <ranges>
+#include <type_traits>
+#include <vector>
+
+#include "constexpr_char_traits.h"
+#include "make_string.h"
+#include "test_iterators.h"
+#include "test_range.h"
+
+template<class CharT>
+constexpr void test() {
+  auto data = MAKE_STRING_VIEW(CharT, "test");
+  std::array<CharT, 4> arr;
+  for(int i = 0; i < 4; ++i) {
+    arr[i] = data[i];
+  }
+  auto sv = std::basic_string_view<CharT>(arr);
+
+  ASSERT_SAME_TYPE(decltype(sv), std::basic_string_view<CharT>);
+  assert(sv.size() == arr.size());
+  assert(sv.data() == arr.data());
+}
+
+constexpr bool test() {
+  test<char>();
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+  test<wchar_t>();
+#endif
+  test<char8_t>();
+  test<char16_t>();
+  test<char32_t>();
+
+  {
+    struct NonConstConversionOperator {
+      const char* data_ = "test";
+      constexpr const char* begin() const { return data_; }
+      constexpr const char* end() const { return data_ + 4; }
+      constexpr operator std::basic_string_view<char>() { return "NonConstConversionOp"; }
+    };
+
+    NonConstConversionOperator nc;
+    std::string_view sv = nc;
+    assert(sv == "NonConstConversionOp");
+    static_assert(!std::is_constructible_v<std::string_view,
+                                           const NonConstConversionOperator&>); // conversion operator is non-const
+  }
+
+  {
+    struct ConstConversionOperator {
+      const char* data_ = "test";
+      constexpr const char* begin() const { return data_; }
+      constexpr const char* end() const { return data_ + 4; }
+      constexpr operator std::basic_string_view<char>() const { return "ConstConversionOp"; }
+    };
+    ConstConversionOperator cv;
+    std::basic_string_view<char> sv = cv;
+    assert(sv == "ConstConversionOp");
+  }
+
+  struct DeletedConversionOperator {
+    const char* data_ = "test";
+    constexpr const char* begin() const { return data_; }
+    constexpr const char* end() const { return data_ + 4; }
+    operator std::basic_string_view<char>() = delete;
+  };
+
+  struct DeletedConstConversionOperator {
+    const char* data_ = "test";
+    constexpr const char* begin() const { return data_; }
+    constexpr const char* end() const { return data_ + 4; }
+    operator std::basic_string_view<char>() const = delete;
+  };
+
+  static_assert(std::is_constructible_v<std::string_view, DeletedConversionOperator>);
+  static_assert(std::is_constructible_v<std::string_view, const DeletedConversionOperator>);
+  static_assert(std::is_constructible_v<std::string_view, DeletedConstConversionOperator>);
+  static_assert(std::is_constructible_v<std::string_view, const DeletedConstConversionOperator>);
+
+  // Test that we're not trying to use the type's conversion operator to string_view in the constructor.
+  {
+    const DeletedConversionOperator d;
+    std::basic_string_view<char> csv = d;
+    assert(csv == "test");
+  }
+
+  {
+    DeletedConstConversionOperator dc;
+    std::basic_string_view<char> sv = dc;
+    assert(sv == "test");
+  }
+
+  return true;
+}
+
+static_assert(std::is_constructible_v<std::string_view, std::vector<char>&>);
+static_assert(std::is_constructible_v<std::string_view, const std::vector<char>&>);
+static_assert(std::is_constructible_v<std::string_view, std::vector<char>&&>);
+static_assert(std::is_constructible_v<std::string_view, const std::vector<char>&&>);
+
+using SizedButNotContiguousRange = std::ranges::subrange<random_access_iterator<char*>>;
+static_assert(!std::ranges::contiguous_range<SizedButNotContiguousRange>);
+static_assert(std::ranges::sized_range<SizedButNotContiguousRange>);
+static_assert(!std::is_constructible_v<std::string_view, SizedButNotContiguousRange>);
+
+using ContiguousButNotSizedRange = std::ranges::subrange<contiguous_iterator<char*>, sentinel_wrapper<contiguous_iterator<char*>>, std::ranges::subrange_kind::unsized>;
+static_assert(std::ranges::contiguous_range<ContiguousButNotSizedRange>);
+static_assert(!std::ranges::sized_range<ContiguousButNotSizedRange>);
+static_assert(!std::is_constructible_v<std::string_view, ContiguousButNotSizedRange>);
+
+static_assert(!std::is_constructible_v<std::string_view, std::vector<char16_t>>); // different CharT
+
+struct WithStringViewConversionOperator {
+  char* begin() const;
+  char* end() const;
+  operator std::string_view() const { return {}; }
+};
+
+static_assert(std::is_constructible_v<std::string_view, WithStringViewConversionOperator>); // lvalue
+static_assert(std::is_constructible_v<std::string_view, const WithStringViewConversionOperator&>); // const lvalue
+static_assert(std::is_constructible_v<std::string_view, WithStringViewConversionOperator&&>); // rvalue
+
+template <class CharTraits>
+struct WithTraitsType {
+  typename CharTraits::char_type* begin() const;
+  typename CharTraits::char_type* end() const;
+  using traits_type = CharTraits;
+};
+
+using CCT = constexpr_char_traits<char>;
+static_assert(std::is_constructible_v<std::string_view, WithTraitsType<std::char_traits<char>>>);
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+static_assert(std::is_constructible_v<std::wstring_view, WithTraitsType<std::char_traits<wchar_t>>>);
+#endif
+static_assert(std::is_constructible_v<std::basic_string_view<char, CCT>, WithTraitsType<CCT>>);
+static_assert(!std::is_constructible_v<std::string_view, WithTraitsType<CCT>>);  // wrong traits type
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+static_assert(!std::is_constructible_v<std::wstring_view, WithTraitsType<std::char_traits<char>>>);  // wrong traits type
+#endif
+
+#ifndef TEST_HAS_NO_EXCEPTIONS
+void test_throwing() {
+  struct ThrowingData {
+    char* begin() const { return nullptr; }
+    char* end() const { return nullptr; }
+    char* data() const { throw 42; return nullptr; }
+  };
+  try {
+    ThrowingData x;
+    (void) std::string_view(x);
+    assert(false);
+  } catch (int i) {
+    assert(i == 42);
+  }
+
+  struct ThrowingSize {
+    char* begin() const { return nullptr; }
+    char* end() const { return nullptr; }
+    size_t size() const { throw 42; return 0; }
+  };
+  try {
+    ThrowingSize x;
+    (void) std::string_view(x);
+    assert(false);
+  } catch (int i) {
+    assert(i == 42);
+  }
+}
+#endif
+
+int main(int, char**) {
+  test();
+  static_assert(test());
+#ifndef TEST_HAS_NO_EXCEPTIONS
+  test_throwing();
+#endif
+
+  return 0;
+}
+

module/jni/libcxx/test/std/strings/string.view/string.view.cons/from_string.pass.cpp

@@ -0,0 +1,68 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// template<class Allocator>
+// basic_string_view(const basic_string<_CharT, _Traits, Allocator>& _str) noexcept
+
+#include <string_view>
+#include <string>
+#include <cassert>
+
+#include "test_macros.h"
+
+struct dummy_char_traits : public std::char_traits<char> {};
+
+template<typename CharT, typename Traits>
+void test ( const std::basic_string<CharT, Traits> &str ) {
+    typedef std::basic_string_view<CharT, Traits> SV;
+    ASSERT_NOEXCEPT(SV(str));
+
+    SV sv1 ( str );
+    assert ( sv1.size() == str.size());
+    assert ( sv1.data() == str.data());
+}
+
+int main(int, char**) {
+
+    test ( std::string("QBCDE") );
+    test ( std::string("") );
+    test ( std::string() );
+
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    test ( std::wstring(L"QBCDE") );
+    test ( std::wstring(L"") );
+    test ( std::wstring() );
+#endif
+
+#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
+    test ( std::u8string{u8"QBCDE"} );
+    test ( std::u8string{u8""} );
+    test ( std::u8string{} );
+#endif
+
+#if TEST_STD_VER >= 11
+    test ( std::u16string{u"QBCDE"} );
+    test ( std::u16string{u""} );
+    test ( std::u16string{} );
+
+    test ( std::u32string{U"QBCDE"} );
+    test ( std::u32string{U""} );
+    test ( std::u32string{} );
+#endif
+
+    test ( std::basic_string<char, dummy_char_traits>("QBCDE") );
+    test ( std::basic_string<char, dummy_char_traits>("") );
+    test ( std::basic_string<char, dummy_char_traits>() );
+
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.cons/from_string1.compile.fail.cpp

@@ -0,0 +1,34 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// template<class Allocator>
+// basic_string_view(const basic_string<_CharT, _Traits, Allocator>& _str) noexcept
+
+#include <string_view>
+#include <string>
+#include <cassert>
+
+struct dummy_char_traits : public std::char_traits<char> {};
+
+int main(int, char**) {
+    using string_view = std::basic_string_view<char>;
+    using string      = std::              basic_string     <char, dummy_char_traits>;
+
+    {
+    string s{"QBCDE"};
+    string_view sv1 ( s );
+    assert ( sv1.size() == s.size());
+    assert ( sv1.data() == s.data());
+    }
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.cons/from_string2.compile.fail.cpp

@@ -0,0 +1,34 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// template<class Allocator>
+// basic_string_view(const basic_string<_CharT, _Traits, Allocator>& _str) noexcept
+
+#include <string_view>
+#include <string>
+#include <cassert>
+
+struct dummy_char_traits : public std::char_traits<char> {};
+
+int main(int, char**) {
+    using string_view = std::basic_string_view<char, dummy_char_traits>;
+    using string      = std::              basic_string     <char>;
+
+    {
+    string s{"QBCDE"};
+    string_view sv1 ( s );
+    assert ( sv1.size() == s.size());
+    assert ( sv1.data() == s.data());
+    }
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.cons/implicit_deduction_guides.pass.cpp

@@ -0,0 +1,71 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14
+
+// <string_view>
+
+// Test that the constructors offered by std::basic_string_view are formulated
+// so they're compatible with implicit deduction guides.
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+
+// Overloads
+// ---------------
+// (1)  basic_string_view() - NOT TESTED
+// (2)  basic_string_view(const basic_string_view&)
+// (3)  basic_string_view(const CharT*, size_type)
+// (4)  basic_string_view(const CharT*)
+int main(int, char**)
+{
+  { // Testing (1)
+    // Nothing to do. Cannot deduce without any arguments.
+  }
+  { // Testing (2)
+    const std::string_view sin("abc");
+    std::basic_string_view s(sin);
+    ASSERT_SAME_TYPE(decltype(s), std::string_view);
+    assert(s == "abc");
+
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    using WSV = std::basic_string_view<wchar_t, constexpr_char_traits<wchar_t>>;
+    const WSV win(L"abcdef");
+    std::basic_string_view w(win);
+    ASSERT_SAME_TYPE(decltype(w), WSV);
+    assert(w == L"abcdef");
+#endif
+  }
+  { // Testing (3)
+    std::basic_string_view s("abc", 2);
+    ASSERT_SAME_TYPE(decltype(s), std::string_view);
+    assert(s == "ab");
+
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    std::basic_string_view w(L"abcdef", 4);
+    ASSERT_SAME_TYPE(decltype(w), std::wstring_view);
+    assert(w == L"abcd");
+#endif
+  }
+  { // Testing (4)
+    std::basic_string_view s("abc");
+    ASSERT_SAME_TYPE(decltype(s), std::string_view);
+    assert(s == "abc");
+
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    std::basic_string_view w(L"abcdef");
+    ASSERT_SAME_TYPE(decltype(w), std::wstring_view);
+    assert(w == L"abcdef");
+#endif
+  }
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.cons/nullptr.compile.pass.cpp

@@ -0,0 +1,20 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
+
+// <string_view>
+
+// basic_string_view(nullptr_t) = delete; // C++2b
+
+#include <string_view>
+#include <type_traits>
+
+static_assert(!std::is_convertible_v<decltype(nullptr), std::string_view>);
+static_assert(!std::is_constructible_v<std::string_view, decltype(nullptr)>);
+static_assert(!std::is_assignable_v<std::string_view, decltype(nullptr)>);

module/jni/libcxx/test/std/strings/string.view/string.view.deduct/iterator_sentinel.pass.cpp

@@ -0,0 +1,55 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+
+// <string_view>
+
+//  template <contiguous_iterator _It, sized_sentinel_for<_It> _End>
+//    basic_string_view(_It, _End) -> basic_string_view<iter_value_t<_It>>;
+
+#include <string_view>
+#include <cassert>
+
+#include "make_string.h"
+#include "test_macros.h"
+#include "test_iterators.h"
+
+template<class It, class Sentinel, class CharT>
+constexpr void test_ctad(std::basic_string_view<CharT> val) {
+  auto sv = std::basic_string_view(It(val.data()), Sentinel(It(val.data() + val.size())));
+  ASSERT_SAME_TYPE(decltype(sv), std::basic_string_view<CharT>);
+  assert(sv.data() == val.data());
+  assert(sv.size() == val.size());
+}
+
+template<class CharT>
+constexpr void test_with_char() {
+  const auto val = MAKE_STRING_VIEW(CharT, "test");
+  test_ctad<CharT*, CharT*>(val);
+  test_ctad<CharT*, const CharT*>(val);
+  test_ctad<const CharT*, CharT*>(val);
+  test_ctad<const CharT*, sized_sentinel<const CharT*>>(val);
+  test_ctad<contiguous_iterator<const CharT*>, contiguous_iterator<const CharT*>>(val);
+  test_ctad<contiguous_iterator<const CharT*>, sized_sentinel<contiguous_iterator<const CharT*>>>(val);
+}
+
+constexpr void test() {
+  test_with_char<char>();
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+  test_with_char<wchar_t>();
+#endif
+  test_with_char<char8_t>();
+  test_with_char<char16_t>();
+  test_with_char<char32_t>();
+}
+
+int main(int, char**) {
+  test();
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.deduct/range.pass.cpp

@@ -0,0 +1,56 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
+
+// <string_view>
+
+//  template<class Range>
+//    basic_string_view(Range&&) -> basic_string_view<ranges::range_value_t<Range>>; // C++23
+
+#include <string_view>
+#include <cassert>
+
+#include "make_string.h"
+#include "test_iterators.h"
+#include "test_macros.h"
+
+template<class CharT>
+void test() {
+  auto val = MAKE_STRING(CharT, "test");
+  auto sv = std::basic_string_view(val);
+  ASSERT_SAME_TYPE(decltype(sv), std::basic_string_view<CharT>);
+  assert(sv.size() == val.size());
+  assert(sv.data() == val.data());
+}
+
+void test() {
+  test<char>();
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+  test<wchar_t>();
+#endif
+  test<char8_t>();
+  test<char16_t>();
+  test<char32_t>();
+  test<char>();
+
+  struct Widget {
+    const char16_t *data_ = u"foo";
+    contiguous_iterator<const char16_t*> begin() const { return contiguous_iterator<const char16_t*>(data_); }
+    contiguous_iterator<const char16_t*> end() const { return contiguous_iterator<const char16_t*>(data_ + 3); }
+  };
+  std::basic_string_view bsv = Widget();
+  ASSERT_SAME_TYPE(decltype(bsv), std::basic_string_view<char16_t>);
+}
+
+int main(int, char**) {
+  test();
+
+  return 0;
+}
+

module/jni/libcxx/test/std/strings/string.view/string.view.find/find_char_size.pass.cpp

@@ -0,0 +1,89 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// constexpr size_type find(charT c, size_type pos = 0) const;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+
+template <class S>
+void
+test(const S& s, typename S::value_type c, typename S::size_type pos,
+     typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.find(c, pos));
+    assert(s.find(c, pos) == x);
+    if (x != S::npos)
+        assert(pos <= x && x + 1 <= s.size());
+}
+
+template <class S>
+void
+test(const S& s, typename S::value_type c, typename S::size_type x)
+{
+    assert(s.find(c) == x);
+    if (x != S::npos)
+        assert(0 <= x && x + 1 <= s.size());
+}
+
+int main(int, char**)
+{
+    {
+    typedef std::string_view S;
+    test(S(""), 'c', 0, S::npos);
+    test(S(""), 'c', 1, S::npos);
+    test(S("abcde"), 'c', 0, 2);
+    test(S("abcde"), 'c', 1, 2);
+    test(S("abcde"), 'c', 2, 2);
+    test(S("abcde"), 'c', 4, S::npos);
+    test(S("abcde"), 'c', 5, S::npos);
+    test(S("abcde"), 'c', 6, S::npos);
+    test(S("abcdeabcde"), 'c', 0, 2);
+    test(S("abcdeabcde"), 'c', 1, 2);
+    test(S("abcdeabcde"), 'c', 5, 7);
+    test(S("abcdeabcde"), 'c', 9, S::npos);
+    test(S("abcdeabcde"), 'c', 10, S::npos);
+    test(S("abcdeabcde"), 'c', 11, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), 'c', 0, 2);
+    test(S("abcdeabcdeabcdeabcde"), 'c', 1, 2);
+    test(S("abcdeabcdeabcdeabcde"), 'c', 10, 12);
+    test(S("abcdeabcdeabcdeabcde"), 'c', 19, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), 'c', 20, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), 'c', 21, S::npos);
+
+    test(S(""), 'c', S::npos);
+    test(S("abcde"), 'c', 2);
+    test(S("abcdeabcde"), 'c', 2);
+    test(S("abcdeabcdeabcdeabcde"), 'c', 2);
+    }
+
+#if TEST_STD_VER > 11
+    {
+    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
+    constexpr SV  sv1;
+    constexpr SV  sv2 { "abcde", 5 };
+
+    static_assert (sv1.find( 'c', 0 ) == SV::npos, "" );
+    static_assert (sv1.find( 'c', 1 ) == SV::npos, "" );
+    static_assert (sv2.find( 'c', 0 ) == 2, "" );
+    static_assert (sv2.find( 'c', 1 ) == 2, "" );
+    static_assert (sv2.find( 'c', 2 ) == 2, "" );
+    static_assert (sv2.find( 'c', 3 ) == SV::npos, "" );
+    static_assert (sv2.find( 'c', 4 ) == SV::npos, "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.find/find_first_not_of_char_size.pass.cpp

@@ -0,0 +1,90 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// constexpr size_type find_first_not_of(charT c, size_type pos = 0) const;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+
+template <class S>
+void
+test(const S& s, typename S::value_type c, typename S::size_type pos,
+     typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.find_first_not_of(c, pos));
+    assert(s.find_first_not_of(c, pos) == x);
+    if (x != S::npos)
+        assert(pos <= x && x < s.size());
+}
+
+template <class S>
+void
+test(const S& s, typename S::value_type c, typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.find_first_not_of(c));
+    assert(s.find_first_not_of(c) == x);
+    if (x != S::npos)
+        assert(x < s.size());
+}
+
+int main(int, char**)
+{
+    {
+    typedef std::string_view S;
+    test(S(""), 'q', 0, S::npos);
+    test(S(""), 'q', 1, S::npos);
+    test(S("kitcj"), 'q', 0, 0);
+    test(S("qkamf"), 'q', 1, 1);
+    test(S("nhmko"), 'q', 2, 2);
+    test(S("tpsaf"), 'q', 4, 4);
+    test(S("lahfb"), 'q', 5, S::npos);
+    test(S("irkhs"), 'q', 6, S::npos);
+    test(S("gmfhdaipsr"), 'q', 0, 0);
+    test(S("kantesmpgj"), 'q', 1, 1);
+    test(S("odaftiegpm"), 'q', 5, 5);
+    test(S("oknlrstdpi"), 'q', 9, 9);
+    test(S("eolhfgpjqk"), 'q', 10, S::npos);
+    test(S("pcdrofikas"), 'q', 11, S::npos);
+    test(S("nbatdlmekrgcfqsophij"), 'q', 0, 0);
+    test(S("bnrpehidofmqtcksjgla"), 'q', 1, 1);
+    test(S("jdmciepkaqgotsrfnhlb"), 'q', 10, 10);
+    test(S("jtdaefblsokrmhpgcnqi"), 'q', 19, 19);
+    test(S("hkbgspofltajcnedqmri"), 'q', 20, S::npos);
+    test(S("oselktgbcapndfjihrmq"), 'q', 21, S::npos);
+
+    test(S(""), 'q', S::npos);
+    test(S("q"), 'q', S::npos);
+    test(S("qqq"), 'q', S::npos);
+    test(S("csope"), 'q', 0);
+    test(S("gfsmthlkon"), 'q', 0);
+    test(S("laenfsbridchgotmkqpj"), 'q', 0);
+    }
+
+#if TEST_STD_VER > 11
+    {
+    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
+    constexpr SV  sv1;
+    constexpr SV  sv2 { "abcde", 5 };
+
+    static_assert (sv1.find_first_not_of( 'q', 0 ) == SV::npos, "" );
+    static_assert (sv1.find_first_not_of( 'q', 1 ) == SV::npos, "" );
+    static_assert (sv2.find_first_not_of( 'q', 0 ) == 0, "" );
+    static_assert (sv2.find_first_not_of( 'q', 1 ) == 1, "" );
+    static_assert (sv2.find_first_not_of( 'q', 5 ) == SV::npos, "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.find/find_first_not_of_pointer_size.pass.cpp

@@ -0,0 +1,170 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// constexpr size_type find_first_not_of(const charT* s, size_type pos = 0) const;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+
+template <class S>
+void
+test(const S& s, const typename S::value_type* str, typename S::size_type pos,
+     typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.find_first_not_of(str, pos));
+    assert(s.find_first_not_of(str, pos) == x);
+    if (x != S::npos)
+        assert(pos <= x && x < s.size());
+}
+
+template <class S>
+void
+test(const S& s, const typename S::value_type* str, typename S::size_type x)
+{
+    assert(s.find_first_not_of(str) == x);
+    if (x != S::npos)
+        assert(x < s.size());
+}
+
+template <class S>
+void test0()
+{
+    test(S(""), "", 0, S::npos);
+    test(S(""), "laenf", 0, S::npos);
+    test(S(""), "pqlnkmbdjo", 0, S::npos);
+    test(S(""), "qkamfogpnljdcshbreti", 0, S::npos);
+    test(S(""), "", 1, S::npos);
+    test(S(""), "bjaht", 1, S::npos);
+    test(S(""), "hjlcmgpket", 1, S::npos);
+    test(S(""), "htaobedqikfplcgjsmrn", 1, S::npos);
+    test(S("fodgq"), "", 0, 0);
+    test(S("qanej"), "dfkap", 0, 0);
+    test(S("clbao"), "ihqrfebgad", 0, 0);
+    test(S("mekdn"), "ngtjfcalbseiqrphmkdo", 0, S::npos);
+    test(S("srdfq"), "", 1, 1);
+    test(S("oemth"), "ikcrq", 1, 1);
+    test(S("cdaih"), "dmajblfhsg", 1, 3);
+    test(S("qohtk"), "oqftjhdmkgsblacenirp", 1, S::npos);
+    test(S("cshmd"), "", 2, 2);
+    test(S("lhcdo"), "oebqi", 2, 2);
+    test(S("qnsoh"), "kojhpmbsfe", 2, S::npos);
+    test(S("pkrof"), "acbsjqogpltdkhinfrem", 2, S::npos);
+    test(S("fmtsp"), "", 4, 4);
+    test(S("khbpm"), "aobjd", 4, 4);
+    test(S("pbsji"), "pcbahntsje", 4, 4);
+    test(S("mprdj"), "fhepcrntkoagbmldqijs", 4, S::npos);
+    test(S("eqmpa"), "", 5, S::npos);
+    test(S("omigs"), "kocgb", 5, S::npos);
+    test(S("onmje"), "fbslrjiqkm", 5, S::npos);
+    test(S("oqmrj"), "jeidpcmalhfnqbgtrsko", 5, S::npos);
+    test(S("schfa"), "", 6, S::npos);
+    test(S("igdsc"), "qngpd", 6, S::npos);
+    test(S("brqgo"), "rodhqklgmb", 6, S::npos);
+    test(S("tnrph"), "thdjgafrlbkoiqcspmne", 6, S::npos);
+    test(S("hcjitbfapl"), "", 0, 0);
+    test(S("daiprenocl"), "ashjd", 0, 2);
+    test(S("litpcfdghe"), "mgojkldsqh", 0, 1);
+    test(S("aidjksrolc"), "imqnaghkfrdtlopbjesc", 0, S::npos);
+    test(S("qpghtfbaji"), "", 1, 1);
+    test(S("gfshlcmdjr"), "nadkh", 1, 1);
+    test(S("nkodajteqp"), "ofdrqmkebl", 1, 4);
+    test(S("gbmetiprqd"), "bdfjqgatlksriohemnpc", 1, S::npos);
+    test(S("crnklpmegd"), "", 5, 5);
+    test(S("jsbtafedoc"), "prqgn", 5, 5);
+    test(S("qnmodrtkeb"), "pejafmnokr", 5, 6);
+    test(S("cpebqsfmnj"), "odnqkgijrhabfmcestlp", 5, S::npos);
+    test(S("lmofqdhpki"), "", 9, 9);
+    test(S("hnefkqimca"), "rtjpa", 9, S::npos);
+    test(S("drtasbgmfp"), "ktsrmnqagd", 9, 9);
+    test(S("lsaijeqhtr"), "rtdhgcisbnmoaqkfpjle", 9, S::npos);
+    test(S("elgofjmbrq"), "", 10, S::npos);
+    test(S("mjqdgalkpc"), "dplqa", 10, S::npos);
+    test(S("kthqnfcerm"), "dkacjoptns", 10, S::npos);
+    test(S("dfsjhanorc"), "hqfimtrgnbekpdcsjalo", 10, S::npos);
+    test(S("eqsgalomhb"), "", 11, S::npos);
+    test(S("akiteljmoh"), "lofbc", 11, S::npos);
+    test(S("hlbdfreqjo"), "astoegbfpn", 11, S::npos);
+    test(S("taqobhlerg"), "pdgreqomsncafklhtibj", 11, S::npos);
+    test(S("snafbdlghrjkpqtoceim"), "", 0, 0);
+    test(S("aemtbrgcklhndjisfpoq"), "lbtqd", 0, 0);
+    test(S("pnracgfkjdiholtbqsem"), "tboimldpjh", 0, 1);
+    test(S("dicfltehbsgrmojnpkaq"), "slcerthdaiqjfnobgkpm", 0, S::npos);
+    test(S("jlnkraeodhcspfgbqitm"), "", 1, 1);
+    test(S("lhosrngtmfjikbqpcade"), "aqibs", 1, 1);
+    test(S("rbtaqjhgkneisldpmfoc"), "gtfblmqinc", 1, 3);
+    test(S("gpifsqlrdkbonjtmheca"), "mkqpbtdalgniorhfescj", 1, S::npos);
+    test(S("hdpkobnsalmcfijregtq"), "", 10, 10);
+    test(S("jtlshdgqaiprkbcoenfm"), "pblas", 10, 11);
+    test(S("fkdrbqltsgmcoiphneaj"), "arosdhcfme", 10, 13);
+    test(S("crsplifgtqedjohnabmk"), "blkhjeogicatqfnpdmsr", 10, S::npos);
+    test(S("niptglfbosehkamrdqcj"), "", 19, 19);
+    test(S("copqdhstbingamjfkler"), "djkqc", 19, 19);
+    test(S("mrtaefilpdsgocnhqbjk"), "lgokshjtpb", 19, S::npos);
+    test(S("kojatdhlcmigpbfrqnes"), "bqjhtkfepimcnsgrlado", 19, S::npos);
+    test(S("eaintpchlqsbdgrkjofm"), "", 20, S::npos);
+    test(S("gjnhidfsepkrtaqbmclo"), "nocfa", 20, S::npos);
+    test(S("spocfaktqdbiejlhngmr"), "bgtajmiedc", 20, S::npos);
+    test(S("rphmlekgfscndtaobiqj"), "lsckfnqgdahejiopbtmr", 20, S::npos);
+    test(S("liatsqdoegkmfcnbhrpj"), "", 21, S::npos);
+    test(S("binjagtfldkrspcomqeh"), "gfsrt", 21, S::npos);
+    test(S("latkmisecnorjbfhqpdg"), "pfsocbhjtm", 21, S::npos);
+    test(S("lecfratdjkhnsmqpoigb"), "tpflmdnoicjgkberhqsa", 21, S::npos);
+}
+
+template <class S>
+void test1()
+{
+    test(S(""), "", S::npos);
+    test(S(""), "laenf", S::npos);
+    test(S(""), "pqlnkmbdjo", S::npos);
+    test(S(""), "qkamfogpnljdcshbreti", S::npos);
+    test(S("nhmko"), "", 0);
+    test(S("lahfb"), "irkhs", 0);
+    test(S("gmfhd"), "kantesmpgj", 2);
+    test(S("odaft"), "oknlrstdpiqmjbaghcfe", S::npos);
+    test(S("eolhfgpjqk"), "", 0);
+    test(S("nbatdlmekr"), "bnrpe", 2);
+    test(S("jdmciepkaq"), "jtdaefblso", 2);
+    test(S("hkbgspoflt"), "oselktgbcapndfjihrmq", S::npos);
+    test(S("gprdcokbnjhlsfmtieqa"), "", 0);
+    test(S("qjghlnftcaismkropdeb"), "bjaht", 0);
+    test(S("pnalfrdtkqcmojiesbhg"), "hjlcmgpket", 1);
+    test(S("pniotcfrhqsmgdkjbael"), "htaobedqikfplcgjsmrn", S::npos);
+}
+
+int main(int, char**)
+{
+    {
+    typedef std::string_view S;
+    test0<S>();
+    test1<S>();
+    }
+
+#if TEST_STD_VER > 11
+    {
+    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
+    constexpr SV  sv1;
+    constexpr SV  sv2 { "abcde", 5 };
+
+    static_assert (sv1.find_first_not_of( "",      0) == SV::npos, "" );
+    static_assert (sv1.find_first_not_of( "irkhs", 0) == SV::npos, "" );
+    static_assert (sv2.find_first_not_of( "",      0) == 0, "" );
+    static_assert (sv2.find_first_not_of( "gfsrt", 0) == 0, "" );
+    static_assert (sv2.find_first_not_of( "lecar", 0) == 1, "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.find/find_first_not_of_pointer_size_size.pass.cpp

@@ -0,0 +1,397 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// constexpr size_type find_first_not_of(const charT* s, size_type pos, size_type n) const;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+
+template <class S>
+void
+test(const S& s, const typename S::value_type* str, typename S::size_type pos,
+     typename S::size_type n, typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.find_first_not_of(str, pos, n));
+    assert(s.find_first_not_of(str, pos, n) == x);
+    if (x != S::npos)
+        assert(pos <= x && x < s.size());
+}
+
+template <class S>
+void test0()
+{
+    test(S(""), "", 0, 0, S::npos);
+    test(S(""), "irkhs", 0, 0, S::npos);
+    test(S(""), "kante", 0, 1, S::npos);
+    test(S(""), "oknlr", 0, 2, S::npos);
+    test(S(""), "pcdro", 0, 4, S::npos);
+    test(S(""), "bnrpe", 0, 5, S::npos);
+    test(S(""), "jtdaefblso", 0, 0, S::npos);
+    test(S(""), "oselktgbca", 0, 1, S::npos);
+    test(S(""), "eqgaplhckj", 0, 5, S::npos);
+    test(S(""), "bjahtcmnlp", 0, 9, S::npos);
+    test(S(""), "hjlcmgpket", 0, 10, S::npos);
+    test(S(""), "htaobedqikfplcgjsmrn", 0, 0, S::npos);
+    test(S(""), "hpqiarojkcdlsgnmfetb", 0, 1, S::npos);
+    test(S(""), "dfkaprhjloqetcsimnbg", 0, 10, S::npos);
+    test(S(""), "ihqrfebgadntlpmjksoc", 0, 19, S::npos);
+    test(S(""), "ngtjfcalbseiqrphmkdo", 0, 20, S::npos);
+    test(S(""), "", 1, 0, S::npos);
+    test(S(""), "lbtqd", 1, 0, S::npos);
+    test(S(""), "tboim", 1, 1, S::npos);
+    test(S(""), "slcer", 1, 2, S::npos);
+    test(S(""), "cbjfs", 1, 4, S::npos);
+    test(S(""), "aqibs", 1, 5, S::npos);
+    test(S(""), "gtfblmqinc", 1, 0, S::npos);
+    test(S(""), "mkqpbtdalg", 1, 1, S::npos);
+    test(S(""), "kphatlimcd", 1, 5, S::npos);
+    test(S(""), "pblasqogic", 1, 9, S::npos);
+    test(S(""), "arosdhcfme", 1, 10, S::npos);
+    test(S(""), "blkhjeogicatqfnpdmsr", 1, 0, S::npos);
+    test(S(""), "bmhineprjcoadgstflqk", 1, 1, S::npos);
+    test(S(""), "djkqcmetslnghpbarfoi", 1, 10, S::npos);
+    test(S(""), "lgokshjtpbemarcdqnfi", 1, 19, S::npos);
+    test(S(""), "bqjhtkfepimcnsgrlado", 1, 20, S::npos);
+    test(S("eaint"), "", 0, 0, 0);
+    test(S("binja"), "gfsrt", 0, 0, 0);
+    test(S("latkm"), "pfsoc", 0, 1, 0);
+    test(S("lecfr"), "tpflm", 0, 2, 0);
+    test(S("eqkst"), "sgkec", 0, 4, 1);
+    test(S("cdafr"), "romds", 0, 5, 0);
+    test(S("prbhe"), "qhjistlgmr", 0, 0, 0);
+    test(S("lbisk"), "pedfirsglo", 0, 1, 0);
+    test(S("hrlpd"), "aqcoslgrmk", 0, 5, 0);
+    test(S("ehmja"), "dabckmepqj", 0, 9, 1);
+    test(S("mhqgd"), "pqscrjthli", 0, 10, 0);
+    test(S("tgklq"), "kfphdcsjqmobliagtren", 0, 0, 0);
+    test(S("bocjs"), "rokpefncljibsdhqtagm", 0, 1, 0);
+    test(S("grbsd"), "afionmkphlebtcjqsgrd", 0, 10, 0);
+    test(S("ofjqr"), "aenmqplidhkofrjbctsg", 0, 19, S::npos);
+    test(S("btlfi"), "osjmbtcadhiklegrpqnf", 0, 20, S::npos);
+    test(S("clrgb"), "", 1, 0, 1);
+    test(S("tjmek"), "osmia", 1, 0, 1);
+    test(S("bgstp"), "ckonl", 1, 1, 1);
+    test(S("hstrk"), "ilcaj", 1, 2, 1);
+    test(S("kmspj"), "lasiq", 1, 4, 1);
+    test(S("tjboh"), "kfqmr", 1, 5, 1);
+    test(S("ilbcj"), "klnitfaobg", 1, 0, 1);
+    test(S("jkngf"), "gjhmdlqikp", 1, 1, 1);
+    test(S("gfcql"), "skbgtahqej", 1, 5, 1);
+    test(S("dqtlg"), "bjsdgtlpkf", 1, 9, 1);
+    test(S("bthpg"), "bjgfmnlkio", 1, 10, 1);
+    test(S("dgsnq"), "lbhepotfsjdqigcnamkr", 1, 0, 1);
+    test(S("rmfhp"), "tebangckmpsrqdlfojhi", 1, 1, 1);
+    test(S("jfdam"), "joflqbdkhtegimscpanr", 1, 10, 3);
+    test(S("edapb"), "adpmcohetfbsrjinlqkg", 1, 19, S::npos);
+    test(S("brfsm"), "iacldqjpfnogbsrhmetk", 1, 20, S::npos);
+    test(S("ndrhl"), "", 2, 0, 2);
+    test(S("mrecp"), "otkgb", 2, 0, 2);
+    test(S("qlasf"), "cqsjl", 2, 1, 2);
+    test(S("smaqd"), "dpifl", 2, 2, 2);
+    test(S("hjeni"), "oapht", 2, 4, 2);
+    test(S("ocmfj"), "cifts", 2, 5, 2);
+    test(S("hmftq"), "nmsckbgalo", 2, 0, 2);
+    test(S("fklad"), "tpksqhamle", 2, 1, 2);
+    test(S("dirnm"), "tpdrchmkji", 2, 5, 3);
+    test(S("hrgdc"), "ijagfkblst", 2, 9, 3);
+    test(S("ifakg"), "kpocsignjb", 2, 10, 2);
+    test(S("ebrgd"), "pecqtkjsnbdrialgmohf", 2, 0, 2);
+    test(S("rcjml"), "aiortphfcmkjebgsndql", 2, 1, 2);
+    test(S("peqmt"), "sdbkeamglhipojqftrcn", 2, 10, 2);
+    test(S("frehn"), "ljqncehgmfktroapidbs", 2, 19, S::npos);
+    test(S("tqolf"), "rtcfodilamkbenjghqps", 2, 20, S::npos);
+    test(S("cjgao"), "", 4, 0, 4);
+    test(S("kjplq"), "mabns", 4, 0, 4);
+    test(S("herni"), "bdnrp", 4, 1, 4);
+    test(S("tadrb"), "scidp", 4, 2, 4);
+    test(S("pkfeo"), "agbjl", 4, 4, 4);
+    test(S("hoser"), "jfmpr", 4, 5, S::npos);
+    test(S("kgrsp"), "rbpefghsmj", 4, 0, 4);
+    test(S("pgejb"), "apsfntdoqc", 4, 1, 4);
+    test(S("thlnq"), "ndkjeisgcl", 4, 5, 4);
+    test(S("nbmit"), "rnfpqatdeo", 4, 9, S::npos);
+    test(S("jgmib"), "bntjlqrfik", 4, 10, S::npos);
+    test(S("ncrfj"), "kcrtmpolnaqejghsfdbi", 4, 0, 4);
+    test(S("ncsik"), "lobheanpkmqidsrtcfgj", 4, 1, 4);
+    test(S("sgbfh"), "athdkljcnreqbgpmisof", 4, 10, S::npos);
+    test(S("dktbn"), "qkdmjialrscpbhefgont", 4, 19, S::npos);
+    test(S("fthqm"), "dmasojntqleribkgfchp", 4, 20, S::npos);
+    test(S("klopi"), "", 5, 0, S::npos);
+    test(S("dajhn"), "psthd", 5, 0, S::npos);
+    test(S("jbgno"), "rpmjd", 5, 1, S::npos);
+    test(S("hkjae"), "dfsmk", 5, 2, S::npos);
+}
+
+template <class S>
+void test1()
+{
+    test(S("gbhqo"), "skqne", 5, 4, S::npos);
+    test(S("ktdor"), "kipnf", 5, 5, S::npos);
+    test(S("ldprn"), "hmrnqdgifl", 5, 0, S::npos);
+    test(S("egmjk"), "fsmjcdairn", 5, 1, S::npos);
+    test(S("armql"), "pcdgltbrfj", 5, 5, S::npos);
+    test(S("cdhjo"), "aekfctpirg", 5, 9, S::npos);
+    test(S("jcons"), "ledihrsgpf", 5, 10, S::npos);
+    test(S("cbrkp"), "mqcklahsbtirgopefndj", 5, 0, S::npos);
+    test(S("fhgna"), "kmlthaoqgecrnpdbjfis", 5, 1, S::npos);
+    test(S("ejfcd"), "sfhbamcdptojlkrenqgi", 5, 10, S::npos);
+    test(S("kqjhe"), "pbniofmcedrkhlstgaqj", 5, 19, S::npos);
+    test(S("pbdjl"), "mongjratcskbhqiepfdl", 5, 20, S::npos);
+    test(S("gajqn"), "", 6, 0, S::npos);
+    test(S("stedk"), "hrnat", 6, 0, S::npos);
+    test(S("tjkaf"), "gsqdt", 6, 1, S::npos);
+    test(S("dthpe"), "bspkd", 6, 2, S::npos);
+    test(S("klhde"), "ohcmb", 6, 4, S::npos);
+    test(S("bhlki"), "heatr", 6, 5, S::npos);
+    test(S("lqmoh"), "pmblckedfn", 6, 0, S::npos);
+    test(S("mtqin"), "aceqmsrbik", 6, 1, S::npos);
+    test(S("dpqbr"), "lmbtdehjrn", 6, 5, S::npos);
+    test(S("kdhmo"), "teqmcrlgib", 6, 9, S::npos);
+    test(S("jblqp"), "njolbmspac", 6, 10, S::npos);
+    test(S("qmjgl"), "pofnhidklamecrbqjgst", 6, 0, S::npos);
+    test(S("rothp"), "jbhckmtgrqnosafedpli", 6, 1, S::npos);
+    test(S("ghknq"), "dobntpmqklicsahgjerf", 6, 10, S::npos);
+    test(S("eopfi"), "tpdshainjkbfoemlrgcq", 6, 19, S::npos);
+    test(S("dsnmg"), "oldpfgeakrnitscbjmqh", 6, 20, S::npos);
+    test(S("jnkrfhotgl"), "", 0, 0, 0);
+    test(S("dltjfngbko"), "rqegt", 0, 0, 0);
+    test(S("bmjlpkiqde"), "dashm", 0, 1, 0);
+    test(S("skrflobnqm"), "jqirk", 0, 2, 0);
+    test(S("jkpldtshrm"), "rckeg", 0, 4, 0);
+    test(S("ghasdbnjqo"), "jscie", 0, 5, 0);
+    test(S("igrkhpbqjt"), "efsphndliq", 0, 0, 0);
+    test(S("ikthdgcamf"), "gdicosleja", 0, 1, 0);
+    test(S("pcofgeniam"), "qcpjibosfl", 0, 5, 2);
+    test(S("rlfjgesqhc"), "lrhmefnjcq", 0, 9, 4);
+    test(S("itphbqsker"), "dtablcrseo", 0, 10, 0);
+    test(S("skjafcirqm"), "apckjsftedbhgomrnilq", 0, 0, 0);
+    test(S("tcqomarsfd"), "pcbrgflehjtiadnsokqm", 0, 1, 0);
+    test(S("rocfeldqpk"), "nsiadegjklhobrmtqcpf", 0, 10, 0);
+    test(S("cfpegndlkt"), "cpmajdqnolikhgsbretf", 0, 19, 1);
+    test(S("fqbtnkeasj"), "jcflkntmgiqrphdosaeb", 0, 20, S::npos);
+    test(S("shbcqnmoar"), "", 1, 0, 1);
+    test(S("bdoshlmfin"), "ontrs", 1, 0, 1);
+    test(S("khfrebnsgq"), "pfkna", 1, 1, 1);
+    test(S("getcrsaoji"), "ekosa", 1, 2, 2);
+    test(S("fjiknedcpq"), "anqhk", 1, 4, 1);
+    test(S("tkejgnafrm"), "jekca", 1, 5, 4);
+    test(S("jnakolqrde"), "ikemsjgacf", 1, 0, 1);
+    test(S("lcjptsmgbe"), "arolgsjkhm", 1, 1, 1);
+    test(S("itfsmcjorl"), "oftkbldhre", 1, 5, 3);
+    test(S("omchkfrjea"), "gbkqdoeftl", 1, 9, 1);
+    test(S("cigfqkated"), "sqcflrgtim", 1, 10, 5);
+    test(S("tscenjikml"), "fmhbkislrjdpanogqcet", 1, 0, 1);
+    test(S("qcpaemsinf"), "rnioadktqlgpbcjsmhef", 1, 1, 1);
+    test(S("gltkojeipd"), "oakgtnldpsefihqmjcbr", 1, 10, 5);
+    test(S("qistfrgnmp"), "gbnaelosidmcjqktfhpr", 1, 19, 5);
+    test(S("bdnpfcqaem"), "akbripjhlosndcmqgfet", 1, 20, S::npos);
+    test(S("ectnhskflp"), "", 5, 0, 5);
+    test(S("fgtianblpq"), "pijag", 5, 0, 5);
+    test(S("mfeqklirnh"), "jrckd", 5, 1, 5);
+    test(S("astedncjhk"), "qcloh", 5, 2, 5);
+    test(S("fhlqgcajbr"), "thlmp", 5, 4, 5);
+    test(S("epfhocmdng"), "qidmo", 5, 5, 5);
+    test(S("apcnsibger"), "lnegpsjqrd", 5, 0, 5);
+    test(S("aqkocrbign"), "rjqdablmfs", 5, 1, 6);
+    test(S("ijsmdtqgce"), "enkgpbsjaq", 5, 5, 5);
+    test(S("clobgsrken"), "kdsgoaijfh", 5, 9, 6);
+    test(S("jbhcfposld"), "trfqgmckbe", 5, 10, 5);
+    test(S("oqnpblhide"), "igetsracjfkdnpoblhqm", 5, 0, 5);
+    test(S("lroeasctif"), "nqctfaogirshlekbdjpm", 5, 1, 5);
+    test(S("bpjlgmiedh"), "csehfgomljdqinbartkp", 5, 10, 6);
+    test(S("pamkeoidrj"), "qahoegcmplkfsjbdnitr", 5, 19, 8);
+    test(S("espogqbthk"), "dpteiajrqmsognhlfbkc", 5, 20, S::npos);
+    test(S("shoiedtcjb"), "", 9, 0, 9);
+    test(S("ebcinjgads"), "tqbnh", 9, 0, 9);
+    test(S("dqmregkcfl"), "akmle", 9, 1, 9);
+    test(S("ngcrieqajf"), "iqfkm", 9, 2, 9);
+    test(S("qosmilgnjb"), "tqjsr", 9, 4, 9);
+    test(S("ikabsjtdfl"), "jplqg", 9, 5, S::npos);
+    test(S("ersmicafdh"), "oilnrbcgtj", 9, 0, 9);
+    test(S("fdnplotmgh"), "morkglpesn", 9, 1, 9);
+    test(S("fdbicojerm"), "dmicerngat", 9, 5, S::npos);
+    test(S("mbtafndjcq"), "radgeskbtc", 9, 9, 9);
+    test(S("mlenkpfdtc"), "ljikprsmqo", 9, 10, 9);
+    test(S("ahlcifdqgs"), "trqihkcgsjamfdbolnpe", 9, 0, 9);
+    test(S("bgjemaltks"), "lqmthbsrekajgnofcipd", 9, 1, 9);
+    test(S("pdhslbqrfc"), "jtalmedribkgqsopcnfh", 9, 10, 9);
+    test(S("dirhtsnjkc"), "spqfoiclmtagejbndkrh", 9, 19, S::npos);
+    test(S("dlroktbcja"), "nmotklspigjrdhcfaebq", 9, 20, S::npos);
+    test(S("ncjpmaekbs"), "", 10, 0, S::npos);
+    test(S("hlbosgmrak"), "hpmsd", 10, 0, S::npos);
+    test(S("pqfhsgilen"), "qnpor", 10, 1, S::npos);
+    test(S("gqtjsbdckh"), "otdma", 10, 2, S::npos);
+    test(S("cfkqpjlegi"), "efhjg", 10, 4, S::npos);
+    test(S("beanrfodgj"), "odpte", 10, 5, S::npos);
+    test(S("adtkqpbjfi"), "bctdgfmolr", 10, 0, S::npos);
+    test(S("iomkfthagj"), "oaklidrbqg", 10, 1, S::npos);
+}
+
+template <class S>
+void test2()
+{
+    test(S("sdpcilonqj"), "dnjfsagktr", 10, 5, S::npos);
+    test(S("gtfbdkqeml"), "nejaktmiqg", 10, 9, S::npos);
+    test(S("bmeqgcdorj"), "pjqonlebsf", 10, 10, S::npos);
+    test(S("etqlcanmob"), "dshmnbtolcjepgaikfqr", 10, 0, S::npos);
+    test(S("roqmkbdtia"), "iogfhpabtjkqlrnemcds", 10, 1, S::npos);
+    test(S("kadsithljf"), "ngridfabjsecpqltkmoh", 10, 10, S::npos);
+    test(S("sgtkpbfdmh"), "athmknplcgofrqejsdib", 10, 19, S::npos);
+    test(S("qgmetnabkl"), "ldobhmqcafnjtkeisgrp", 10, 20, S::npos);
+    test(S("cqjohampgd"), "", 11, 0, S::npos);
+    test(S("hobitmpsan"), "aocjb", 11, 0, S::npos);
+    test(S("tjehkpsalm"), "jbrnk", 11, 1, S::npos);
+    test(S("ngfbojitcl"), "tqedg", 11, 2, S::npos);
+    test(S("rcfkdbhgjo"), "nqskp", 11, 4, S::npos);
+    test(S("qghptonrea"), "eaqkl", 11, 5, S::npos);
+    test(S("hnprfgqjdl"), "reaoicljqm", 11, 0, S::npos);
+    test(S("hlmgabenti"), "lsftgajqpm", 11, 1, S::npos);
+    test(S("ofcjanmrbs"), "rlpfogmits", 11, 5, S::npos);
+    test(S("jqedtkornm"), "shkncmiaqj", 11, 9, S::npos);
+    test(S("rfedlasjmg"), "fpnatrhqgs", 11, 10, S::npos);
+    test(S("talpqjsgkm"), "sjclemqhnpdbgikarfot", 11, 0, S::npos);
+    test(S("lrkcbtqpie"), "otcmedjikgsfnqbrhpla", 11, 1, S::npos);
+    test(S("cipogdskjf"), "bonsaefdqiprkhlgtjcm", 11, 10, S::npos);
+    test(S("nqedcojahi"), "egpscmahijlfnkrodqtb", 11, 19, S::npos);
+    test(S("hefnrkmctj"), "kmqbfepjthgilscrndoa", 11, 20, S::npos);
+    test(S("atqirnmekfjolhpdsgcb"), "", 0, 0, 0);
+    test(S("echfkmlpribjnqsaogtd"), "prboq", 0, 0, 0);
+    test(S("qnhiftdgcleajbpkrosm"), "fjcqh", 0, 1, 0);
+    test(S("chamfknorbedjitgslpq"), "fmosa", 0, 2, 0);
+    test(S("njhqpibfmtlkaecdrgso"), "qdbok", 0, 4, 0);
+    test(S("ebnghfsqkprmdcljoiat"), "amslg", 0, 5, 0);
+    test(S("letjomsgihfrpqbkancd"), "smpltjneqb", 0, 0, 0);
+    test(S("nblgoipcrqeaktshjdmf"), "flitskrnge", 0, 1, 0);
+    test(S("cehkbngtjoiflqapsmrd"), "pgqihmlbef", 0, 5, 0);
+    test(S("mignapfoklbhcqjetdrs"), "cfpdqjtgsb", 0, 9, 0);
+    test(S("ceatbhlsqjgpnokfrmdi"), "htpsiaflom", 0, 10, 0);
+    test(S("ocihkjgrdelpfnmastqb"), "kpjfiaceghsrdtlbnomq", 0, 0, 0);
+    test(S("noelgschdtbrjfmiqkap"), "qhtbomidljgafneksprc", 0, 1, 0);
+    test(S("dkclqfombepritjnghas"), "nhtjobkcefldimpsaqgr", 0, 10, 0);
+    test(S("miklnresdgbhqcojftap"), "prabcjfqnoeskilmtgdh", 0, 19, 11);
+    test(S("htbcigojaqmdkfrnlsep"), "dtrgmchilkasqoebfpjn", 0, 20, S::npos);
+    test(S("febhmqtjanokscdirpgl"), "", 1, 0, 1);
+    test(S("loakbsqjpcrdhftniegm"), "sqome", 1, 0, 1);
+    test(S("reagphsqflbitdcjmkno"), "smfte", 1, 1, 1);
+    test(S("jitlfrqemsdhkopncabg"), "ciboh", 1, 2, 2);
+    test(S("mhtaepscdnrjqgbkifol"), "haois", 1, 4, 2);
+    test(S("tocesrfmnglpbjihqadk"), "abfki", 1, 5, 1);
+    test(S("lpfmctjrhdagneskbqoi"), "frdkocntmq", 1, 0, 1);
+    test(S("lsmqaepkdhncirbtjfgo"), "oasbpedlnr", 1, 1, 1);
+    test(S("epoiqmtldrabnkjhcfsg"), "kltqmhgand", 1, 5, 1);
+    test(S("emgasrilpknqojhtbdcf"), "gdtfjchpmr", 1, 9, 3);
+    test(S("hnfiagdpcklrjetqbsom"), "ponmcqblet", 1, 10, 2);
+    test(S("nsdfebgajhmtricpoklq"), "sgphqdnofeiklatbcmjr", 1, 0, 1);
+    test(S("atjgfsdlpobmeiqhncrk"), "ljqprsmigtfoneadckbh", 1, 1, 1);
+    test(S("sitodfgnrejlahcbmqkp"), "ligeojhafnkmrcsqtbdp", 1, 10, 2);
+    test(S("fraghmbiceknltjpqosd"), "lsimqfnjarbopedkhcgt", 1, 19, 13);
+    test(S("pmafenlhqtdbkirjsogc"), "abedmfjlghniorcqptks", 1, 20, S::npos);
+    test(S("pihgmoeqtnakrjslcbfd"), "", 10, 0, 10);
+    test(S("gjdkeprctqblnhiafsom"), "hqtoa", 10, 0, 10);
+    test(S("mkpnblfdsahrcqijteog"), "cahif", 10, 1, 10);
+    test(S("gckarqnelodfjhmbptis"), "kehis", 10, 2, 10);
+    test(S("gqpskidtbclomahnrjfe"), "kdlmh", 10, 4, 11);
+    test(S("pkldjsqrfgitbhmaecno"), "paeql", 10, 5, 10);
+    test(S("aftsijrbeklnmcdqhgop"), "aghoqiefnb", 10, 0, 10);
+    test(S("mtlgdrhafjkbiepqnsoc"), "jrbqaikpdo", 10, 1, 10);
+    test(S("pqgirnaefthokdmbsclj"), "smjonaeqcl", 10, 5, 10);
+    test(S("kpdbgjmtherlsfcqoina"), "eqbdrkcfah", 10, 9, 11);
+    test(S("jrlbothiknqmdgcfasep"), "kapmsienhf", 10, 10, 10);
+    test(S("mjogldqferckabinptsh"), "jpqotrlenfcsbhkaimdg", 10, 0, 10);
+    test(S("apoklnefbhmgqcdrisjt"), "jlbmhnfgtcqprikeados", 10, 1, 10);
+    test(S("ifeopcnrjbhkdgatmqls"), "stgbhfmdaljnpqoicker", 10, 10, 11);
+    test(S("ckqhaiesmjdnrgolbtpf"), "oihcetflbjagdsrkmqpn", 10, 19, 11);
+    test(S("bnlgapfimcoterskqdjh"), "adtclebmnpjsrqfkigoh", 10, 20, S::npos);
+    test(S("kgdlrobpmjcthqsafeni"), "", 19, 0, 19);
+    test(S("dfkechomjapgnslbtqir"), "beafg", 19, 0, 19);
+    test(S("rloadknfbqtgmhcsipje"), "iclat", 19, 1, 19);
+    test(S("mgjhkolrnadqbpetcifs"), "rkhnf", 19, 2, 19);
+    test(S("cmlfakiojdrgtbsphqen"), "clshq", 19, 4, 19);
+    test(S("kghbfipeomsntdalrqjc"), "dtcoj", 19, 5, S::npos);
+    test(S("eldiqckrnmtasbghjfpo"), "rqosnjmfth", 19, 0, 19);
+    test(S("abqjcfedgotihlnspkrm"), "siatdfqglh", 19, 1, 19);
+    test(S("qfbadrtjsimkolcenhpg"), "mrlshtpgjq", 19, 5, 19);
+    test(S("abseghclkjqifmtodrnp"), "adlcskgqjt", 19, 9, 19);
+    test(S("ibmsnlrjefhtdokacqpg"), "drshcjknaf", 19, 10, 19);
+    test(S("mrkfciqjebaponsthldg"), "etsaqroinghpkjdlfcbm", 19, 0, 19);
+    test(S("mjkticdeoqshpalrfbgn"), "sgepdnkqliambtrocfhj", 19, 1, 19);
+    test(S("rqnoclbdejgiphtfsakm"), "nlmcjaqgbsortfdihkpe", 19, 10, S::npos);
+    test(S("plkqbhmtfaeodjcrsing"), "racfnpmosldibqkghjet", 19, 19, S::npos);
+    test(S("oegalhmstjrfickpbndq"), "fjhdsctkqeiolagrnmbp", 19, 20, S::npos);
+    test(S("rdtgjcaohpblniekmsfq"), "", 20, 0, S::npos);
+    test(S("ofkqbnjetrmsaidphglc"), "ejanp", 20, 0, S::npos);
+    test(S("grkpahljcftesdmonqib"), "odife", 20, 1, S::npos);
+    test(S("jimlgbhfqkteospardcn"), "okaqd", 20, 2, S::npos);
+    test(S("gftenihpmslrjkqadcob"), "lcdbi", 20, 4, S::npos);
+    test(S("bmhldogtckrfsanijepq"), "fsqbj", 20, 5, S::npos);
+    test(S("nfqkrpjdesabgtlcmoih"), "bigdomnplq", 20, 0, S::npos);
+    test(S("focalnrpiqmdkstehbjg"), "apiblotgcd", 20, 1, S::npos);
+    test(S("rhqdspkmebiflcotnjga"), "acfhdenops", 20, 5, S::npos);
+    test(S("rahdtmsckfboqlpniegj"), "jopdeamcrk", 20, 9, S::npos);
+    test(S("fbkeiopclstmdqranjhg"), "trqncbkgmh", 20, 10, S::npos);
+    test(S("lifhpdgmbconstjeqark"), "tomglrkencbsfjqpihda", 20, 0, S::npos);
+}
+
+template <class S>
+void test3()
+{
+    test(S("pboqganrhedjmltsicfk"), "gbkhdnpoietfcmrslajq", 20, 1, S::npos);
+    test(S("klchabsimetjnqgorfpd"), "rtfnmbsglkjaichoqedp", 20, 10, S::npos);
+    test(S("sirfgmjqhctndbklaepo"), "ohkmdpfqbsacrtjnlgei", 20, 19, S::npos);
+    test(S("rlbdsiceaonqjtfpghkm"), "dlbrteoisgphmkncajfq", 20, 20, S::npos);
+    test(S("ecgdanriptblhjfqskom"), "", 21, 0, S::npos);
+    test(S("fdmiarlpgcskbhoteqjn"), "sjrlo", 21, 0, S::npos);
+    test(S("rlbstjqopignecmfadkh"), "qjpor", 21, 1, S::npos);
+    test(S("grjpqmbshektdolcafni"), "odhfn", 21, 2, S::npos);
+    test(S("sakfcohtqnibprjmlged"), "qtfin", 21, 4, S::npos);
+    test(S("mjtdglasihqpocebrfkn"), "hpqfo", 21, 5, S::npos);
+    test(S("okaplfrntghqbmeicsdj"), "fabmertkos", 21, 0, S::npos);
+    test(S("sahngemrtcjidqbklfpo"), "brqtgkmaej", 21, 1, S::npos);
+    test(S("dlmsipcnekhbgoaftqjr"), "nfrdeihsgl", 21, 5, S::npos);
+    test(S("ahegrmqnoiklpfsdbcjt"), "hlfrosekpi", 21, 9, S::npos);
+    test(S("hdsjbnmlegtkqripacof"), "atgbkrjdsm", 21, 10, S::npos);
+    test(S("pcnedrfjihqbalkgtoms"), "blnrptjgqmaifsdkhoec", 21, 0, S::npos);
+    test(S("qjidealmtpskrbfhocng"), "ctpmdahebfqjgknloris", 21, 1, S::npos);
+    test(S("qeindtagmokpfhsclrbj"), "apnkeqthrmlbfodiscgj", 21, 10, S::npos);
+    test(S("kpfegbjhsrnodltqciam"), "jdgictpframeoqlsbknh", 21, 19, S::npos);
+    test(S("hnbrcplsjfgiktoedmaq"), "qprlsfojamgndekthibc", 21, 20, S::npos);
+}
+
+int main(int, char**)
+{
+    {
+    typedef std::string_view S;
+    test0<S>();
+    test1<S>();
+    test2<S>();
+    test3<S>();
+    }
+
+#if TEST_STD_VER > 11
+    {
+    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
+    constexpr SV  sv1;
+    constexpr SV  sv2 { "abcde", 5 };
+
+    static_assert (sv1.find_first_not_of( "",      0, 0) == SV::npos, "" );
+    static_assert (sv1.find_first_not_of( "irkhs", 0, 5) == SV::npos, "" );
+    static_assert (sv2.find_first_not_of( "",      0, 0) == 0, "" );
+    static_assert (sv2.find_first_not_of( "gfsrt", 0, 5) == 0, "" );
+    static_assert (sv2.find_first_not_of( "lecar", 0, 5) == 1, "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.find/find_first_not_of_string_view_size.pass.cpp

@@ -0,0 +1,154 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// size_type find_first_not_of(const basic_string& str, size_type pos = 0) const;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+
+template <class S>
+void
+test(const S& s, const S& str, typename S::size_type pos, typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.find_first_not_of(str, pos));
+    assert(s.find_first_not_of(str, pos) == x);
+    if (x != S::npos)
+        assert(pos <= x && x < s.size());
+}
+
+template <class S>
+void
+test(const S& s, const S& str, typename S::size_type x)
+{
+    assert(s.find_first_not_of(str) == x);
+    if (x != S::npos)
+        assert(x < s.size());
+}
+
+template <class S>
+void test0()
+{
+    test(S(""), S(""), 0, S::npos);
+    test(S(""), S("laenf"), 0, S::npos);
+    test(S(""), S("pqlnkmbdjo"), 0, S::npos);
+    test(S(""), S("qkamfogpnljdcshbreti"), 0, S::npos);
+    test(S(""), S(""), 1, S::npos);
+    test(S(""), S("bjaht"), 1, S::npos);
+    test(S(""), S("hjlcmgpket"), 1, S::npos);
+    test(S(""), S("htaobedqikfplcgjsmrn"), 1, S::npos);
+    test(S("fodgq"), S(""), 0, 0);
+    test(S("qanej"), S("dfkap"), 0, 0);
+    test(S("clbao"), S("ihqrfebgad"), 0, 0);
+    test(S("mekdn"), S("ngtjfcalbseiqrphmkdo"), 0, S::npos);
+    test(S("srdfq"), S(""), 1, 1);
+    test(S("oemth"), S("ikcrq"), 1, 1);
+    test(S("cdaih"), S("dmajblfhsg"), 1, 3);
+    test(S("qohtk"), S("oqftjhdmkgsblacenirp"), 1, S::npos);
+    test(S("cshmd"), S(""), 2, 2);
+    test(S("lhcdo"), S("oebqi"), 2, 2);
+    test(S("qnsoh"), S("kojhpmbsfe"), 2, S::npos);
+    test(S("pkrof"), S("acbsjqogpltdkhinfrem"), 2, S::npos);
+    test(S("fmtsp"), S(""), 4, 4);
+    test(S("khbpm"), S("aobjd"), 4, 4);
+    test(S("pbsji"), S("pcbahntsje"), 4, 4);
+    test(S("mprdj"), S("fhepcrntkoagbmldqijs"), 4, S::npos);
+    test(S("eqmpa"), S(""), 5, S::npos);
+    test(S("omigs"), S("kocgb"), 5, S::npos);
+    test(S("onmje"), S("fbslrjiqkm"), 5, S::npos);
+    test(S("oqmrj"), S("jeidpcmalhfnqbgtrsko"), 5, S::npos);
+    test(S("schfa"), S(""), 6, S::npos);
+    test(S("igdsc"), S("qngpd"), 6, S::npos);
+    test(S("brqgo"), S("rodhqklgmb"), 6, S::npos);
+    test(S("tnrph"), S("thdjgafrlbkoiqcspmne"), 6, S::npos);
+    test(S("hcjitbfapl"), S(""), 0, 0);
+    test(S("daiprenocl"), S("ashjd"), 0, 2);
+    test(S("litpcfdghe"), S("mgojkldsqh"), 0, 1);
+    test(S("aidjksrolc"), S("imqnaghkfrdtlopbjesc"), 0, S::npos);
+    test(S("qpghtfbaji"), S(""), 1, 1);
+    test(S("gfshlcmdjr"), S("nadkh"), 1, 1);
+    test(S("nkodajteqp"), S("ofdrqmkebl"), 1, 4);
+    test(S("gbmetiprqd"), S("bdfjqgatlksriohemnpc"), 1, S::npos);
+    test(S("crnklpmegd"), S(""), 5, 5);
+    test(S("jsbtafedoc"), S("prqgn"), 5, 5);
+    test(S("qnmodrtkeb"), S("pejafmnokr"), 5, 6);
+    test(S("cpebqsfmnj"), S("odnqkgijrhabfmcestlp"), 5, S::npos);
+    test(S("lmofqdhpki"), S(""), 9, 9);
+    test(S("hnefkqimca"), S("rtjpa"), 9, S::npos);
+    test(S("drtasbgmfp"), S("ktsrmnqagd"), 9, 9);
+    test(S("lsaijeqhtr"), S("rtdhgcisbnmoaqkfpjle"), 9, S::npos);
+    test(S("elgofjmbrq"), S(""), 10, S::npos);
+    test(S("mjqdgalkpc"), S("dplqa"), 10, S::npos);
+    test(S("kthqnfcerm"), S("dkacjoptns"), 10, S::npos);
+    test(S("dfsjhanorc"), S("hqfimtrgnbekpdcsjalo"), 10, S::npos);
+    test(S("eqsgalomhb"), S(""), 11, S::npos);
+    test(S("akiteljmoh"), S("lofbc"), 11, S::npos);
+    test(S("hlbdfreqjo"), S("astoegbfpn"), 11, S::npos);
+    test(S("taqobhlerg"), S("pdgreqomsncafklhtibj"), 11, S::npos);
+    test(S("snafbdlghrjkpqtoceim"), S(""), 0, 0);
+    test(S("aemtbrgcklhndjisfpoq"), S("lbtqd"), 0, 0);
+    test(S("pnracgfkjdiholtbqsem"), S("tboimldpjh"), 0, 1);
+    test(S("dicfltehbsgrmojnpkaq"), S("slcerthdaiqjfnobgkpm"), 0, S::npos);
+    test(S("jlnkraeodhcspfgbqitm"), S(""), 1, 1);
+    test(S("lhosrngtmfjikbqpcade"), S("aqibs"), 1, 1);
+    test(S("rbtaqjhgkneisldpmfoc"), S("gtfblmqinc"), 1, 3);
+    test(S("gpifsqlrdkbonjtmheca"), S("mkqpbtdalgniorhfescj"), 1, S::npos);
+    test(S("hdpkobnsalmcfijregtq"), S(""), 10, 10);
+    test(S("jtlshdgqaiprkbcoenfm"), S("pblas"), 10, 11);
+    test(S("fkdrbqltsgmcoiphneaj"), S("arosdhcfme"), 10, 13);
+    test(S("crsplifgtqedjohnabmk"), S("blkhjeogicatqfnpdmsr"), 10, S::npos);
+    test(S("niptglfbosehkamrdqcj"), S(""), 19, 19);
+    test(S("copqdhstbingamjfkler"), S("djkqc"), 19, 19);
+    test(S("mrtaefilpdsgocnhqbjk"), S("lgokshjtpb"), 19, S::npos);
+    test(S("kojatdhlcmigpbfrqnes"), S("bqjhtkfepimcnsgrlado"), 19, S::npos);
+    test(S("eaintpchlqsbdgrkjofm"), S(""), 20, S::npos);
+    test(S("gjnhidfsepkrtaqbmclo"), S("nocfa"), 20, S::npos);
+    test(S("spocfaktqdbiejlhngmr"), S("bgtajmiedc"), 20, S::npos);
+    test(S("rphmlekgfscndtaobiqj"), S("lsckfnqgdahejiopbtmr"), 20, S::npos);
+    test(S("liatsqdoegkmfcnbhrpj"), S(""), 21, S::npos);
+    test(S("binjagtfldkrspcomqeh"), S("gfsrt"), 21, S::npos);
+    test(S("latkmisecnorjbfhqpdg"), S("pfsocbhjtm"), 21, S::npos);
+    test(S("lecfratdjkhnsmqpoigb"), S("tpflmdnoicjgkberhqsa"), 21, S::npos);
+}
+
+template <class S>
+void test1()
+{
+    test(S(""), S(""), S::npos);
+    test(S(""), S("laenf"), S::npos);
+    test(S(""), S("pqlnkmbdjo"), S::npos);
+    test(S(""), S("qkamfogpnljdcshbreti"), S::npos);
+    test(S("nhmko"), S(""), 0);
+    test(S("lahfb"), S("irkhs"), 0);
+    test(S("gmfhd"), S("kantesmpgj"), 2);
+    test(S("odaft"), S("oknlrstdpiqmjbaghcfe"), S::npos);
+    test(S("eolhfgpjqk"), S(""), 0);
+    test(S("nbatdlmekr"), S("bnrpe"), 2);
+    test(S("jdmciepkaq"), S("jtdaefblso"), 2);
+    test(S("hkbgspoflt"), S("oselktgbcapndfjihrmq"), S::npos);
+    test(S("gprdcokbnjhlsfmtieqa"), S(""), 0);
+    test(S("qjghlnftcaismkropdeb"), S("bjaht"), 0);
+    test(S("pnalfrdtkqcmojiesbhg"), S("hjlcmgpket"), 1);
+    test(S("pniotcfrhqsmgdkjbael"), S("htaobedqikfplcgjsmrn"), S::npos);
+}
+
+int main(int, char**)
+{
+    {
+    typedef std::string_view S;
+    test0<S>();
+    test1<S>();
+    }
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.find/find_first_of_char_size.pass.cpp

@@ -0,0 +1,87 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// constexpr size_type find_first_of(charT c, size_type pos = 0) const;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+
+template <class S>
+void
+test(const S& s, typename S::value_type c, typename S::size_type pos,
+     typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.find_first_of(c, pos));
+    assert(s.find_first_of(c, pos) == x);
+    if (x != S::npos)
+        assert(pos <= x && x < s.size());
+}
+
+template <class S>
+void
+test(const S& s, typename S::value_type c, typename S::size_type x)
+{
+    assert(s.find_first_of(c) == x);
+    if (x != S::npos)
+        assert(x < s.size());
+}
+
+int main(int, char**)
+{
+    {
+    typedef std::string_view S;
+    test(S(""), 'e', 0, S::npos);
+    test(S(""), 'e', 1, S::npos);
+    test(S("kitcj"), 'e', 0, S::npos);
+    test(S("qkamf"), 'e', 1, S::npos);
+    test(S("nhmko"), 'e', 2, S::npos);
+    test(S("tpsaf"), 'e', 4, S::npos);
+    test(S("lahfb"), 'e', 5, S::npos);
+    test(S("irkhs"), 'e', 6, S::npos);
+    test(S("gmfhdaipsr"), 'e', 0, S::npos);
+    test(S("kantesmpgj"), 'e', 1, 4);
+    test(S("odaftiegpm"), 'e', 5, 6);
+    test(S("oknlrstdpi"), 'e', 9, S::npos);
+    test(S("eolhfgpjqk"), 'e', 10, S::npos);
+    test(S("pcdrofikas"), 'e', 11, S::npos);
+    test(S("nbatdlmekrgcfqsophij"), 'e', 0, 7);
+    test(S("bnrpehidofmqtcksjgla"), 'e', 1, 4);
+    test(S("jdmciepkaqgotsrfnhlb"), 'e', 10, S::npos);
+    test(S("jtdaefblsokrmhpgcnqi"), 'e', 19, S::npos);
+    test(S("hkbgspofltajcnedqmri"), 'e', 20, S::npos);
+    test(S("oselktgbcapndfjihrmq"), 'e', 21, S::npos);
+
+    test(S(""), 'e', S::npos);
+    test(S("csope"), 'e', 4);
+    test(S("gfsmthlkon"), 'e', S::npos);
+    test(S("laenfsbridchgotmkqpj"), 'e', 2);
+    }
+
+#if TEST_STD_VER > 11
+    {
+    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
+    constexpr SV  sv1;
+    constexpr SV  sv2 { "abcde", 5 };
+
+    static_assert (sv1.find_first_of( 'e', 0 ) == SV::npos, "" );
+    static_assert (sv1.find_first_of( 'e', 1 ) == SV::npos, "" );
+    static_assert (sv2.find_first_of( 'q', 0 ) == SV::npos, "" );
+    static_assert (sv2.find_first_of( 'e', 1 ) == 4, "" );
+    static_assert (sv2.find_first_of( 'e', 5 ) == SV::npos, "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.find/find_first_of_pointer_size.pass.cpp

@@ -0,0 +1,171 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// constexpr size_type find_first_of(const charT* s, size_type pos = 0) const;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+
+template <class S>
+void
+test(const S& s, const typename S::value_type* str, typename S::size_type pos,
+     typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.find_first_of(str, pos));
+    assert(s.find_first_of(str, pos) == x);
+    if (x != S::npos)
+        assert(pos <= x && x < s.size());
+}
+
+template <class S>
+void
+test(const S& s, const typename S::value_type* str, typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.find_first_of(str));
+    assert(s.find_first_of(str) == x);
+    if (x != S::npos)
+        assert(x < s.size());
+}
+
+template <class S>
+void test0()
+{
+    test(S(""), "", 0, S::npos);
+    test(S(""), "laenf", 0, S::npos);
+    test(S(""), "pqlnkmbdjo", 0, S::npos);
+    test(S(""), "qkamfogpnljdcshbreti", 0, S::npos);
+    test(S(""), "", 1, S::npos);
+    test(S(""), "bjaht", 1, S::npos);
+    test(S(""), "hjlcmgpket", 1, S::npos);
+    test(S(""), "htaobedqikfplcgjsmrn", 1, S::npos);
+    test(S("fodgq"), "", 0, S::npos);
+    test(S("qanej"), "dfkap", 0, 1);
+    test(S("clbao"), "ihqrfebgad", 0, 2);
+    test(S("mekdn"), "ngtjfcalbseiqrphmkdo", 0, 0);
+    test(S("srdfq"), "", 1, S::npos);
+    test(S("oemth"), "ikcrq", 1, S::npos);
+    test(S("cdaih"), "dmajblfhsg", 1, 1);
+    test(S("qohtk"), "oqftjhdmkgsblacenirp", 1, 1);
+    test(S("cshmd"), "", 2, S::npos);
+    test(S("lhcdo"), "oebqi", 2, 4);
+    test(S("qnsoh"), "kojhpmbsfe", 2, 2);
+    test(S("pkrof"), "acbsjqogpltdkhinfrem", 2, 2);
+    test(S("fmtsp"), "", 4, S::npos);
+    test(S("khbpm"), "aobjd", 4, S::npos);
+    test(S("pbsji"), "pcbahntsje", 4, S::npos);
+    test(S("mprdj"), "fhepcrntkoagbmldqijs", 4, 4);
+    test(S("eqmpa"), "", 5, S::npos);
+    test(S("omigs"), "kocgb", 5, S::npos);
+    test(S("onmje"), "fbslrjiqkm", 5, S::npos);
+    test(S("oqmrj"), "jeidpcmalhfnqbgtrsko", 5, S::npos);
+    test(S("schfa"), "", 6, S::npos);
+    test(S("igdsc"), "qngpd", 6, S::npos);
+    test(S("brqgo"), "rodhqklgmb", 6, S::npos);
+    test(S("tnrph"), "thdjgafrlbkoiqcspmne", 6, S::npos);
+    test(S("hcjitbfapl"), "", 0, S::npos);
+    test(S("daiprenocl"), "ashjd", 0, 0);
+    test(S("litpcfdghe"), "mgojkldsqh", 0, 0);
+    test(S("aidjksrolc"), "imqnaghkfrdtlopbjesc", 0, 0);
+    test(S("qpghtfbaji"), "", 1, S::npos);
+    test(S("gfshlcmdjr"), "nadkh", 1, 3);
+    test(S("nkodajteqp"), "ofdrqmkebl", 1, 1);
+    test(S("gbmetiprqd"), "bdfjqgatlksriohemnpc", 1, 1);
+    test(S("crnklpmegd"), "", 5, S::npos);
+    test(S("jsbtafedoc"), "prqgn", 5, S::npos);
+    test(S("qnmodrtkeb"), "pejafmnokr", 5, 5);
+    test(S("cpebqsfmnj"), "odnqkgijrhabfmcestlp", 5, 5);
+    test(S("lmofqdhpki"), "", 9, S::npos);
+    test(S("hnefkqimca"), "rtjpa", 9, 9);
+    test(S("drtasbgmfp"), "ktsrmnqagd", 9, S::npos);
+    test(S("lsaijeqhtr"), "rtdhgcisbnmoaqkfpjle", 9, 9);
+    test(S("elgofjmbrq"), "", 10, S::npos);
+    test(S("mjqdgalkpc"), "dplqa", 10, S::npos);
+    test(S("kthqnfcerm"), "dkacjoptns", 10, S::npos);
+    test(S("dfsjhanorc"), "hqfimtrgnbekpdcsjalo", 10, S::npos);
+    test(S("eqsgalomhb"), "", 11, S::npos);
+    test(S("akiteljmoh"), "lofbc", 11, S::npos);
+    test(S("hlbdfreqjo"), "astoegbfpn", 11, S::npos);
+    test(S("taqobhlerg"), "pdgreqomsncafklhtibj", 11, S::npos);
+    test(S("snafbdlghrjkpqtoceim"), "", 0, S::npos);
+    test(S("aemtbrgcklhndjisfpoq"), "lbtqd", 0, 3);
+    test(S("pnracgfkjdiholtbqsem"), "tboimldpjh", 0, 0);
+    test(S("dicfltehbsgrmojnpkaq"), "slcerthdaiqjfnobgkpm", 0, 0);
+    test(S("jlnkraeodhcspfgbqitm"), "", 1, S::npos);
+    test(S("lhosrngtmfjikbqpcade"), "aqibs", 1, 3);
+    test(S("rbtaqjhgkneisldpmfoc"), "gtfblmqinc", 1, 1);
+    test(S("gpifsqlrdkbonjtmheca"), "mkqpbtdalgniorhfescj", 1, 1);
+    test(S("hdpkobnsalmcfijregtq"), "", 10, S::npos);
+    test(S("jtlshdgqaiprkbcoenfm"), "pblas", 10, 10);
+    test(S("fkdrbqltsgmcoiphneaj"), "arosdhcfme", 10, 10);
+    test(S("crsplifgtqedjohnabmk"), "blkhjeogicatqfnpdmsr", 10, 10);
+    test(S("niptglfbosehkamrdqcj"), "", 19, S::npos);
+    test(S("copqdhstbingamjfkler"), "djkqc", 19, S::npos);
+    test(S("mrtaefilpdsgocnhqbjk"), "lgokshjtpb", 19, 19);
+    test(S("kojatdhlcmigpbfrqnes"), "bqjhtkfepimcnsgrlado", 19, 19);
+    test(S("eaintpchlqsbdgrkjofm"), "", 20, S::npos);
+    test(S("gjnhidfsepkrtaqbmclo"), "nocfa", 20, S::npos);
+    test(S("spocfaktqdbiejlhngmr"), "bgtajmiedc", 20, S::npos);
+    test(S("rphmlekgfscndtaobiqj"), "lsckfnqgdahejiopbtmr", 20, S::npos);
+    test(S("liatsqdoegkmfcnbhrpj"), "", 21, S::npos);
+    test(S("binjagtfldkrspcomqeh"), "gfsrt", 21, S::npos);
+    test(S("latkmisecnorjbfhqpdg"), "pfsocbhjtm", 21, S::npos);
+    test(S("lecfratdjkhnsmqpoigb"), "tpflmdnoicjgkberhqsa", 21, S::npos);
+}
+
+template <class S>
+void test1()
+{
+    test(S(""), "", S::npos);
+    test(S(""), "laenf", S::npos);
+    test(S(""), "pqlnkmbdjo", S::npos);
+    test(S(""), "qkamfogpnljdcshbreti", S::npos);
+    test(S("nhmko"), "", S::npos);
+    test(S("lahfb"), "irkhs", 2);
+    test(S("gmfhd"), "kantesmpgj", 0);
+    test(S("odaft"), "oknlrstdpiqmjbaghcfe", 0);
+    test(S("eolhfgpjqk"), "", S::npos);
+    test(S("nbatdlmekr"), "bnrpe", 0);
+    test(S("jdmciepkaq"), "jtdaefblso", 0);
+    test(S("hkbgspoflt"), "oselktgbcapndfjihrmq", 0);
+    test(S("gprdcokbnjhlsfmtieqa"), "", S::npos);
+    test(S("qjghlnftcaismkropdeb"), "bjaht", 1);
+    test(S("pnalfrdtkqcmojiesbhg"), "hjlcmgpket", 0);
+    test(S("pniotcfrhqsmgdkjbael"), "htaobedqikfplcgjsmrn", 0);
+}
+
+int main(int, char**)
+{
+    {
+    typedef std::string_view S;
+    test0<S>();
+    test1<S>();
+    }
+
+#if TEST_STD_VER > 11
+    {
+    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
+    constexpr SV  sv1;
+    constexpr SV  sv2 { "abcde", 5 };
+
+    static_assert (sv1.find_first_of( "",      0) == SV::npos, "" );
+    static_assert (sv1.find_first_of( "irkhs", 0) == SV::npos, "" );
+    static_assert (sv2.find_first_of( "",      0) == SV::npos, "" );
+    static_assert (sv2.find_first_of( "gfsrt", 0) == SV::npos, "" );
+    static_assert (sv2.find_first_of( "lecar", 0) == 0, "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.find/find_first_of_pointer_size_size.pass.cpp

@@ -0,0 +1,397 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// constexpr size_type find_first_of(const charT* s, size_type pos, size_type n) const;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+
+template <class S>
+void
+test(const S& s, const typename S::value_type* str, typename S::size_type pos,
+     typename S::size_type n, typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.find_first_of(str, pos, n));
+    assert(s.find_first_of(str, pos, n) == x);
+    if (x != S::npos)
+        assert(pos <= x && x < s.size());
+}
+
+template <class S>
+void test0()
+{
+    test(S(""), "", 0, 0, S::npos);
+    test(S(""), "irkhs", 0, 0, S::npos);
+    test(S(""), "kante", 0, 1, S::npos);
+    test(S(""), "oknlr", 0, 2, S::npos);
+    test(S(""), "pcdro", 0, 4, S::npos);
+    test(S(""), "bnrpe", 0, 5, S::npos);
+    test(S(""), "jtdaefblso", 0, 0, S::npos);
+    test(S(""), "oselktgbca", 0, 1, S::npos);
+    test(S(""), "eqgaplhckj", 0, 5, S::npos);
+    test(S(""), "bjahtcmnlp", 0, 9, S::npos);
+    test(S(""), "hjlcmgpket", 0, 10, S::npos);
+    test(S(""), "htaobedqikfplcgjsmrn", 0, 0, S::npos);
+    test(S(""), "hpqiarojkcdlsgnmfetb", 0, 1, S::npos);
+    test(S(""), "dfkaprhjloqetcsimnbg", 0, 10, S::npos);
+    test(S(""), "ihqrfebgadntlpmjksoc", 0, 19, S::npos);
+    test(S(""), "ngtjfcalbseiqrphmkdo", 0, 20, S::npos);
+    test(S(""), "", 1, 0, S::npos);
+    test(S(""), "lbtqd", 1, 0, S::npos);
+    test(S(""), "tboim", 1, 1, S::npos);
+    test(S(""), "slcer", 1, 2, S::npos);
+    test(S(""), "cbjfs", 1, 4, S::npos);
+    test(S(""), "aqibs", 1, 5, S::npos);
+    test(S(""), "gtfblmqinc", 1, 0, S::npos);
+    test(S(""), "mkqpbtdalg", 1, 1, S::npos);
+    test(S(""), "kphatlimcd", 1, 5, S::npos);
+    test(S(""), "pblasqogic", 1, 9, S::npos);
+    test(S(""), "arosdhcfme", 1, 10, S::npos);
+    test(S(""), "blkhjeogicatqfnpdmsr", 1, 0, S::npos);
+    test(S(""), "bmhineprjcoadgstflqk", 1, 1, S::npos);
+    test(S(""), "djkqcmetslnghpbarfoi", 1, 10, S::npos);
+    test(S(""), "lgokshjtpbemarcdqnfi", 1, 19, S::npos);
+    test(S(""), "bqjhtkfepimcnsgrlado", 1, 20, S::npos);
+    test(S("eaint"), "", 0, 0, S::npos);
+    test(S("binja"), "gfsrt", 0, 0, S::npos);
+    test(S("latkm"), "pfsoc", 0, 1, S::npos);
+    test(S("lecfr"), "tpflm", 0, 2, S::npos);
+    test(S("eqkst"), "sgkec", 0, 4, 0);
+    test(S("cdafr"), "romds", 0, 5, 1);
+    test(S("prbhe"), "qhjistlgmr", 0, 0, S::npos);
+    test(S("lbisk"), "pedfirsglo", 0, 1, S::npos);
+    test(S("hrlpd"), "aqcoslgrmk", 0, 5, S::npos);
+    test(S("ehmja"), "dabckmepqj", 0, 9, 0);
+    test(S("mhqgd"), "pqscrjthli", 0, 10, 1);
+    test(S("tgklq"), "kfphdcsjqmobliagtren", 0, 0, S::npos);
+    test(S("bocjs"), "rokpefncljibsdhqtagm", 0, 1, S::npos);
+    test(S("grbsd"), "afionmkphlebtcjqsgrd", 0, 10, S::npos);
+    test(S("ofjqr"), "aenmqplidhkofrjbctsg", 0, 19, 0);
+    test(S("btlfi"), "osjmbtcadhiklegrpqnf", 0, 20, 0);
+    test(S("clrgb"), "", 1, 0, S::npos);
+    test(S("tjmek"), "osmia", 1, 0, S::npos);
+    test(S("bgstp"), "ckonl", 1, 1, S::npos);
+    test(S("hstrk"), "ilcaj", 1, 2, S::npos);
+    test(S("kmspj"), "lasiq", 1, 4, 2);
+    test(S("tjboh"), "kfqmr", 1, 5, S::npos);
+    test(S("ilbcj"), "klnitfaobg", 1, 0, S::npos);
+    test(S("jkngf"), "gjhmdlqikp", 1, 1, 3);
+    test(S("gfcql"), "skbgtahqej", 1, 5, S::npos);
+    test(S("dqtlg"), "bjsdgtlpkf", 1, 9, 2);
+    test(S("bthpg"), "bjgfmnlkio", 1, 10, 4);
+    test(S("dgsnq"), "lbhepotfsjdqigcnamkr", 1, 0, S::npos);
+    test(S("rmfhp"), "tebangckmpsrqdlfojhi", 1, 1, S::npos);
+    test(S("jfdam"), "joflqbdkhtegimscpanr", 1, 10, 1);
+    test(S("edapb"), "adpmcohetfbsrjinlqkg", 1, 19, 1);
+    test(S("brfsm"), "iacldqjpfnogbsrhmetk", 1, 20, 1);
+    test(S("ndrhl"), "", 2, 0, S::npos);
+    test(S("mrecp"), "otkgb", 2, 0, S::npos);
+    test(S("qlasf"), "cqsjl", 2, 1, S::npos);
+    test(S("smaqd"), "dpifl", 2, 2, 4);
+    test(S("hjeni"), "oapht", 2, 4, S::npos);
+    test(S("ocmfj"), "cifts", 2, 5, 3);
+    test(S("hmftq"), "nmsckbgalo", 2, 0, S::npos);
+    test(S("fklad"), "tpksqhamle", 2, 1, S::npos);
+    test(S("dirnm"), "tpdrchmkji", 2, 5, 2);
+    test(S("hrgdc"), "ijagfkblst", 2, 9, 2);
+    test(S("ifakg"), "kpocsignjb", 2, 10, 3);
+    test(S("ebrgd"), "pecqtkjsnbdrialgmohf", 2, 0, S::npos);
+    test(S("rcjml"), "aiortphfcmkjebgsndql", 2, 1, S::npos);
+    test(S("peqmt"), "sdbkeamglhipojqftrcn", 2, 10, 3);
+    test(S("frehn"), "ljqncehgmfktroapidbs", 2, 19, 2);
+    test(S("tqolf"), "rtcfodilamkbenjghqps", 2, 20, 2);
+    test(S("cjgao"), "", 4, 0, S::npos);
+    test(S("kjplq"), "mabns", 4, 0, S::npos);
+    test(S("herni"), "bdnrp", 4, 1, S::npos);
+    test(S("tadrb"), "scidp", 4, 2, S::npos);
+    test(S("pkfeo"), "agbjl", 4, 4, S::npos);
+    test(S("hoser"), "jfmpr", 4, 5, 4);
+    test(S("kgrsp"), "rbpefghsmj", 4, 0, S::npos);
+    test(S("pgejb"), "apsfntdoqc", 4, 1, S::npos);
+    test(S("thlnq"), "ndkjeisgcl", 4, 5, S::npos);
+    test(S("nbmit"), "rnfpqatdeo", 4, 9, 4);
+    test(S("jgmib"), "bntjlqrfik", 4, 10, 4);
+    test(S("ncrfj"), "kcrtmpolnaqejghsfdbi", 4, 0, S::npos);
+    test(S("ncsik"), "lobheanpkmqidsrtcfgj", 4, 1, S::npos);
+    test(S("sgbfh"), "athdkljcnreqbgpmisof", 4, 10, 4);
+    test(S("dktbn"), "qkdmjialrscpbhefgont", 4, 19, 4);
+    test(S("fthqm"), "dmasojntqleribkgfchp", 4, 20, 4);
+    test(S("klopi"), "", 5, 0, S::npos);
+    test(S("dajhn"), "psthd", 5, 0, S::npos);
+    test(S("jbgno"), "rpmjd", 5, 1, S::npos);
+    test(S("hkjae"), "dfsmk", 5, 2, S::npos);
+}
+
+template <class S>
+void test1()
+{
+    test(S("gbhqo"), "skqne", 5, 4, S::npos);
+    test(S("ktdor"), "kipnf", 5, 5, S::npos);
+    test(S("ldprn"), "hmrnqdgifl", 5, 0, S::npos);
+    test(S("egmjk"), "fsmjcdairn", 5, 1, S::npos);
+    test(S("armql"), "pcdgltbrfj", 5, 5, S::npos);
+    test(S("cdhjo"), "aekfctpirg", 5, 9, S::npos);
+    test(S("jcons"), "ledihrsgpf", 5, 10, S::npos);
+    test(S("cbrkp"), "mqcklahsbtirgopefndj", 5, 0, S::npos);
+    test(S("fhgna"), "kmlthaoqgecrnpdbjfis", 5, 1, S::npos);
+    test(S("ejfcd"), "sfhbamcdptojlkrenqgi", 5, 10, S::npos);
+    test(S("kqjhe"), "pbniofmcedrkhlstgaqj", 5, 19, S::npos);
+    test(S("pbdjl"), "mongjratcskbhqiepfdl", 5, 20, S::npos);
+    test(S("gajqn"), "", 6, 0, S::npos);
+    test(S("stedk"), "hrnat", 6, 0, S::npos);
+    test(S("tjkaf"), "gsqdt", 6, 1, S::npos);
+    test(S("dthpe"), "bspkd", 6, 2, S::npos);
+    test(S("klhde"), "ohcmb", 6, 4, S::npos);
+    test(S("bhlki"), "heatr", 6, 5, S::npos);
+    test(S("lqmoh"), "pmblckedfn", 6, 0, S::npos);
+    test(S("mtqin"), "aceqmsrbik", 6, 1, S::npos);
+    test(S("dpqbr"), "lmbtdehjrn", 6, 5, S::npos);
+    test(S("kdhmo"), "teqmcrlgib", 6, 9, S::npos);
+    test(S("jblqp"), "njolbmspac", 6, 10, S::npos);
+    test(S("qmjgl"), "pofnhidklamecrbqjgst", 6, 0, S::npos);
+    test(S("rothp"), "jbhckmtgrqnosafedpli", 6, 1, S::npos);
+    test(S("ghknq"), "dobntpmqklicsahgjerf", 6, 10, S::npos);
+    test(S("eopfi"), "tpdshainjkbfoemlrgcq", 6, 19, S::npos);
+    test(S("dsnmg"), "oldpfgeakrnitscbjmqh", 6, 20, S::npos);
+    test(S("jnkrfhotgl"), "", 0, 0, S::npos);
+    test(S("dltjfngbko"), "rqegt", 0, 0, S::npos);
+    test(S("bmjlpkiqde"), "dashm", 0, 1, 8);
+    test(S("skrflobnqm"), "jqirk", 0, 2, 8);
+    test(S("jkpldtshrm"), "rckeg", 0, 4, 1);
+    test(S("ghasdbnjqo"), "jscie", 0, 5, 3);
+    test(S("igrkhpbqjt"), "efsphndliq", 0, 0, S::npos);
+    test(S("ikthdgcamf"), "gdicosleja", 0, 1, 5);
+    test(S("pcofgeniam"), "qcpjibosfl", 0, 5, 0);
+    test(S("rlfjgesqhc"), "lrhmefnjcq", 0, 9, 0);
+    test(S("itphbqsker"), "dtablcrseo", 0, 10, 1);
+    test(S("skjafcirqm"), "apckjsftedbhgomrnilq", 0, 0, S::npos);
+    test(S("tcqomarsfd"), "pcbrgflehjtiadnsokqm", 0, 1, S::npos);
+    test(S("rocfeldqpk"), "nsiadegjklhobrmtqcpf", 0, 10, 4);
+    test(S("cfpegndlkt"), "cpmajdqnolikhgsbretf", 0, 19, 0);
+    test(S("fqbtnkeasj"), "jcflkntmgiqrphdosaeb", 0, 20, 0);
+    test(S("shbcqnmoar"), "", 1, 0, S::npos);
+    test(S("bdoshlmfin"), "ontrs", 1, 0, S::npos);
+    test(S("khfrebnsgq"), "pfkna", 1, 1, S::npos);
+    test(S("getcrsaoji"), "ekosa", 1, 2, 1);
+    test(S("fjiknedcpq"), "anqhk", 1, 4, 4);
+    test(S("tkejgnafrm"), "jekca", 1, 5, 1);
+    test(S("jnakolqrde"), "ikemsjgacf", 1, 0, S::npos);
+    test(S("lcjptsmgbe"), "arolgsjkhm", 1, 1, S::npos);
+    test(S("itfsmcjorl"), "oftkbldhre", 1, 5, 1);
+    test(S("omchkfrjea"), "gbkqdoeftl", 1, 9, 4);
+    test(S("cigfqkated"), "sqcflrgtim", 1, 10, 1);
+    test(S("tscenjikml"), "fmhbkislrjdpanogqcet", 1, 0, S::npos);
+    test(S("qcpaemsinf"), "rnioadktqlgpbcjsmhef", 1, 1, S::npos);
+    test(S("gltkojeipd"), "oakgtnldpsefihqmjcbr", 1, 10, 1);
+    test(S("qistfrgnmp"), "gbnaelosidmcjqktfhpr", 1, 19, 1);
+    test(S("bdnpfcqaem"), "akbripjhlosndcmqgfet", 1, 20, 1);
+    test(S("ectnhskflp"), "", 5, 0, S::npos);
+    test(S("fgtianblpq"), "pijag", 5, 0, S::npos);
+    test(S("mfeqklirnh"), "jrckd", 5, 1, S::npos);
+    test(S("astedncjhk"), "qcloh", 5, 2, 6);
+    test(S("fhlqgcajbr"), "thlmp", 5, 4, S::npos);
+    test(S("epfhocmdng"), "qidmo", 5, 5, 6);
+    test(S("apcnsibger"), "lnegpsjqrd", 5, 0, S::npos);
+    test(S("aqkocrbign"), "rjqdablmfs", 5, 1, 5);
+    test(S("ijsmdtqgce"), "enkgpbsjaq", 5, 5, 7);
+    test(S("clobgsrken"), "kdsgoaijfh", 5, 9, 5);
+    test(S("jbhcfposld"), "trfqgmckbe", 5, 10, S::npos);
+    test(S("oqnpblhide"), "igetsracjfkdnpoblhqm", 5, 0, S::npos);
+    test(S("lroeasctif"), "nqctfaogirshlekbdjpm", 5, 1, S::npos);
+    test(S("bpjlgmiedh"), "csehfgomljdqinbartkp", 5, 10, 5);
+    test(S("pamkeoidrj"), "qahoegcmplkfsjbdnitr", 5, 19, 5);
+    test(S("espogqbthk"), "dpteiajrqmsognhlfbkc", 5, 20, 5);
+    test(S("shoiedtcjb"), "", 9, 0, S::npos);
+    test(S("ebcinjgads"), "tqbnh", 9, 0, S::npos);
+    test(S("dqmregkcfl"), "akmle", 9, 1, S::npos);
+    test(S("ngcrieqajf"), "iqfkm", 9, 2, S::npos);
+    test(S("qosmilgnjb"), "tqjsr", 9, 4, S::npos);
+    test(S("ikabsjtdfl"), "jplqg", 9, 5, 9);
+    test(S("ersmicafdh"), "oilnrbcgtj", 9, 0, S::npos);
+    test(S("fdnplotmgh"), "morkglpesn", 9, 1, S::npos);
+    test(S("fdbicojerm"), "dmicerngat", 9, 5, 9);
+    test(S("mbtafndjcq"), "radgeskbtc", 9, 9, S::npos);
+    test(S("mlenkpfdtc"), "ljikprsmqo", 9, 10, S::npos);
+    test(S("ahlcifdqgs"), "trqihkcgsjamfdbolnpe", 9, 0, S::npos);
+    test(S("bgjemaltks"), "lqmthbsrekajgnofcipd", 9, 1, S::npos);
+    test(S("pdhslbqrfc"), "jtalmedribkgqsopcnfh", 9, 10, S::npos);
+    test(S("dirhtsnjkc"), "spqfoiclmtagejbndkrh", 9, 19, 9);
+    test(S("dlroktbcja"), "nmotklspigjrdhcfaebq", 9, 20, 9);
+    test(S("ncjpmaekbs"), "", 10, 0, S::npos);
+    test(S("hlbosgmrak"), "hpmsd", 10, 0, S::npos);
+    test(S("pqfhsgilen"), "qnpor", 10, 1, S::npos);
+    test(S("gqtjsbdckh"), "otdma", 10, 2, S::npos);
+    test(S("cfkqpjlegi"), "efhjg", 10, 4, S::npos);
+    test(S("beanrfodgj"), "odpte", 10, 5, S::npos);
+    test(S("adtkqpbjfi"), "bctdgfmolr", 10, 0, S::npos);
+    test(S("iomkfthagj"), "oaklidrbqg", 10, 1, S::npos);
+}
+
+template <class S>
+void test2()
+{
+    test(S("sdpcilonqj"), "dnjfsagktr", 10, 5, S::npos);
+    test(S("gtfbdkqeml"), "nejaktmiqg", 10, 9, S::npos);
+    test(S("bmeqgcdorj"), "pjqonlebsf", 10, 10, S::npos);
+    test(S("etqlcanmob"), "dshmnbtolcjepgaikfqr", 10, 0, S::npos);
+    test(S("roqmkbdtia"), "iogfhpabtjkqlrnemcds", 10, 1, S::npos);
+    test(S("kadsithljf"), "ngridfabjsecpqltkmoh", 10, 10, S::npos);
+    test(S("sgtkpbfdmh"), "athmknplcgofrqejsdib", 10, 19, S::npos);
+    test(S("qgmetnabkl"), "ldobhmqcafnjtkeisgrp", 10, 20, S::npos);
+    test(S("cqjohampgd"), "", 11, 0, S::npos);
+    test(S("hobitmpsan"), "aocjb", 11, 0, S::npos);
+    test(S("tjehkpsalm"), "jbrnk", 11, 1, S::npos);
+    test(S("ngfbojitcl"), "tqedg", 11, 2, S::npos);
+    test(S("rcfkdbhgjo"), "nqskp", 11, 4, S::npos);
+    test(S("qghptonrea"), "eaqkl", 11, 5, S::npos);
+    test(S("hnprfgqjdl"), "reaoicljqm", 11, 0, S::npos);
+    test(S("hlmgabenti"), "lsftgajqpm", 11, 1, S::npos);
+    test(S("ofcjanmrbs"), "rlpfogmits", 11, 5, S::npos);
+    test(S("jqedtkornm"), "shkncmiaqj", 11, 9, S::npos);
+    test(S("rfedlasjmg"), "fpnatrhqgs", 11, 10, S::npos);
+    test(S("talpqjsgkm"), "sjclemqhnpdbgikarfot", 11, 0, S::npos);
+    test(S("lrkcbtqpie"), "otcmedjikgsfnqbrhpla", 11, 1, S::npos);
+    test(S("cipogdskjf"), "bonsaefdqiprkhlgtjcm", 11, 10, S::npos);
+    test(S("nqedcojahi"), "egpscmahijlfnkrodqtb", 11, 19, S::npos);
+    test(S("hefnrkmctj"), "kmqbfepjthgilscrndoa", 11, 20, S::npos);
+    test(S("atqirnmekfjolhpdsgcb"), "", 0, 0, S::npos);
+    test(S("echfkmlpribjnqsaogtd"), "prboq", 0, 0, S::npos);
+    test(S("qnhiftdgcleajbpkrosm"), "fjcqh", 0, 1, 4);
+    test(S("chamfknorbedjitgslpq"), "fmosa", 0, 2, 3);
+    test(S("njhqpibfmtlkaecdrgso"), "qdbok", 0, 4, 3);
+    test(S("ebnghfsqkprmdcljoiat"), "amslg", 0, 5, 3);
+    test(S("letjomsgihfrpqbkancd"), "smpltjneqb", 0, 0, S::npos);
+    test(S("nblgoipcrqeaktshjdmf"), "flitskrnge", 0, 1, 19);
+    test(S("cehkbngtjoiflqapsmrd"), "pgqihmlbef", 0, 5, 2);
+    test(S("mignapfoklbhcqjetdrs"), "cfpdqjtgsb", 0, 9, 2);
+    test(S("ceatbhlsqjgpnokfrmdi"), "htpsiaflom", 0, 10, 2);
+    test(S("ocihkjgrdelpfnmastqb"), "kpjfiaceghsrdtlbnomq", 0, 0, S::npos);
+    test(S("noelgschdtbrjfmiqkap"), "qhtbomidljgafneksprc", 0, 1, 16);
+    test(S("dkclqfombepritjnghas"), "nhtjobkcefldimpsaqgr", 0, 10, 1);
+    test(S("miklnresdgbhqcojftap"), "prabcjfqnoeskilmtgdh", 0, 19, 0);
+    test(S("htbcigojaqmdkfrnlsep"), "dtrgmchilkasqoebfpjn", 0, 20, 0);
+    test(S("febhmqtjanokscdirpgl"), "", 1, 0, S::npos);
+    test(S("loakbsqjpcrdhftniegm"), "sqome", 1, 0, S::npos);
+    test(S("reagphsqflbitdcjmkno"), "smfte", 1, 1, 6);
+    test(S("jitlfrqemsdhkopncabg"), "ciboh", 1, 2, 1);
+    test(S("mhtaepscdnrjqgbkifol"), "haois", 1, 4, 1);
+    test(S("tocesrfmnglpbjihqadk"), "abfki", 1, 5, 6);
+    test(S("lpfmctjrhdagneskbqoi"), "frdkocntmq", 1, 0, S::npos);
+    test(S("lsmqaepkdhncirbtjfgo"), "oasbpedlnr", 1, 1, 19);
+    test(S("epoiqmtldrabnkjhcfsg"), "kltqmhgand", 1, 5, 4);
+    test(S("emgasrilpknqojhtbdcf"), "gdtfjchpmr", 1, 9, 1);
+    test(S("hnfiagdpcklrjetqbsom"), "ponmcqblet", 1, 10, 1);
+    test(S("nsdfebgajhmtricpoklq"), "sgphqdnofeiklatbcmjr", 1, 0, S::npos);
+    test(S("atjgfsdlpobmeiqhncrk"), "ljqprsmigtfoneadckbh", 1, 1, 7);
+    test(S("sitodfgnrejlahcbmqkp"), "ligeojhafnkmrcsqtbdp", 1, 10, 1);
+    test(S("fraghmbiceknltjpqosd"), "lsimqfnjarbopedkhcgt", 1, 19, 1);
+    test(S("pmafenlhqtdbkirjsogc"), "abedmfjlghniorcqptks", 1, 20, 1);
+    test(S("pihgmoeqtnakrjslcbfd"), "", 10, 0, S::npos);
+    test(S("gjdkeprctqblnhiafsom"), "hqtoa", 10, 0, S::npos);
+    test(S("mkpnblfdsahrcqijteog"), "cahif", 10, 1, 12);
+    test(S("gckarqnelodfjhmbptis"), "kehis", 10, 2, S::npos);
+    test(S("gqpskidtbclomahnrjfe"), "kdlmh", 10, 4, 10);
+    test(S("pkldjsqrfgitbhmaecno"), "paeql", 10, 5, 15);
+    test(S("aftsijrbeklnmcdqhgop"), "aghoqiefnb", 10, 0, S::npos);
+    test(S("mtlgdrhafjkbiepqnsoc"), "jrbqaikpdo", 10, 1, S::npos);
+    test(S("pqgirnaefthokdmbsclj"), "smjonaeqcl", 10, 5, 11);
+    test(S("kpdbgjmtherlsfcqoina"), "eqbdrkcfah", 10, 9, 10);
+    test(S("jrlbothiknqmdgcfasep"), "kapmsienhf", 10, 10, 11);
+    test(S("mjogldqferckabinptsh"), "jpqotrlenfcsbhkaimdg", 10, 0, S::npos);
+    test(S("apoklnefbhmgqcdrisjt"), "jlbmhnfgtcqprikeados", 10, 1, 18);
+    test(S("ifeopcnrjbhkdgatmqls"), "stgbhfmdaljnpqoicker", 10, 10, 10);
+    test(S("ckqhaiesmjdnrgolbtpf"), "oihcetflbjagdsrkmqpn", 10, 19, 10);
+    test(S("bnlgapfimcoterskqdjh"), "adtclebmnpjsrqfkigoh", 10, 20, 10);
+    test(S("kgdlrobpmjcthqsafeni"), "", 19, 0, S::npos);
+    test(S("dfkechomjapgnslbtqir"), "beafg", 19, 0, S::npos);
+    test(S("rloadknfbqtgmhcsipje"), "iclat", 19, 1, S::npos);
+    test(S("mgjhkolrnadqbpetcifs"), "rkhnf", 19, 2, S::npos);
+    test(S("cmlfakiojdrgtbsphqen"), "clshq", 19, 4, S::npos);
+    test(S("kghbfipeomsntdalrqjc"), "dtcoj", 19, 5, 19);
+    test(S("eldiqckrnmtasbghjfpo"), "rqosnjmfth", 19, 0, S::npos);
+    test(S("abqjcfedgotihlnspkrm"), "siatdfqglh", 19, 1, S::npos);
+    test(S("qfbadrtjsimkolcenhpg"), "mrlshtpgjq", 19, 5, S::npos);
+    test(S("abseghclkjqifmtodrnp"), "adlcskgqjt", 19, 9, S::npos);
+    test(S("ibmsnlrjefhtdokacqpg"), "drshcjknaf", 19, 10, S::npos);
+    test(S("mrkfciqjebaponsthldg"), "etsaqroinghpkjdlfcbm", 19, 0, S::npos);
+    test(S("mjkticdeoqshpalrfbgn"), "sgepdnkqliambtrocfhj", 19, 1, S::npos);
+    test(S("rqnoclbdejgiphtfsakm"), "nlmcjaqgbsortfdihkpe", 19, 10, 19);
+    test(S("plkqbhmtfaeodjcrsing"), "racfnpmosldibqkghjet", 19, 19, 19);
+    test(S("oegalhmstjrfickpbndq"), "fjhdsctkqeiolagrnmbp", 19, 20, 19);
+    test(S("rdtgjcaohpblniekmsfq"), "", 20, 0, S::npos);
+    test(S("ofkqbnjetrmsaidphglc"), "ejanp", 20, 0, S::npos);
+    test(S("grkpahljcftesdmonqib"), "odife", 20, 1, S::npos);
+    test(S("jimlgbhfqkteospardcn"), "okaqd", 20, 2, S::npos);
+    test(S("gftenihpmslrjkqadcob"), "lcdbi", 20, 4, S::npos);
+    test(S("bmhldogtckrfsanijepq"), "fsqbj", 20, 5, S::npos);
+    test(S("nfqkrpjdesabgtlcmoih"), "bigdomnplq", 20, 0, S::npos);
+    test(S("focalnrpiqmdkstehbjg"), "apiblotgcd", 20, 1, S::npos);
+    test(S("rhqdspkmebiflcotnjga"), "acfhdenops", 20, 5, S::npos);
+    test(S("rahdtmsckfboqlpniegj"), "jopdeamcrk", 20, 9, S::npos);
+    test(S("fbkeiopclstmdqranjhg"), "trqncbkgmh", 20, 10, S::npos);
+    test(S("lifhpdgmbconstjeqark"), "tomglrkencbsfjqpihda", 20, 0, S::npos);
+}
+
+template <class S>
+void test3()
+{
+    test(S("pboqganrhedjmltsicfk"), "gbkhdnpoietfcmrslajq", 20, 1, S::npos);
+    test(S("klchabsimetjnqgorfpd"), "rtfnmbsglkjaichoqedp", 20, 10, S::npos);
+    test(S("sirfgmjqhctndbklaepo"), "ohkmdpfqbsacrtjnlgei", 20, 19, S::npos);
+    test(S("rlbdsiceaonqjtfpghkm"), "dlbrteoisgphmkncajfq", 20, 20, S::npos);
+    test(S("ecgdanriptblhjfqskom"), "", 21, 0, S::npos);
+    test(S("fdmiarlpgcskbhoteqjn"), "sjrlo", 21, 0, S::npos);
+    test(S("rlbstjqopignecmfadkh"), "qjpor", 21, 1, S::npos);
+    test(S("grjpqmbshektdolcafni"), "odhfn", 21, 2, S::npos);
+    test(S("sakfcohtqnibprjmlged"), "qtfin", 21, 4, S::npos);
+    test(S("mjtdglasihqpocebrfkn"), "hpqfo", 21, 5, S::npos);
+    test(S("okaplfrntghqbmeicsdj"), "fabmertkos", 21, 0, S::npos);
+    test(S("sahngemrtcjidqbklfpo"), "brqtgkmaej", 21, 1, S::npos);
+    test(S("dlmsipcnekhbgoaftqjr"), "nfrdeihsgl", 21, 5, S::npos);
+    test(S("ahegrmqnoiklpfsdbcjt"), "hlfrosekpi", 21, 9, S::npos);
+    test(S("hdsjbnmlegtkqripacof"), "atgbkrjdsm", 21, 10, S::npos);
+    test(S("pcnedrfjihqbalkgtoms"), "blnrptjgqmaifsdkhoec", 21, 0, S::npos);
+    test(S("qjidealmtpskrbfhocng"), "ctpmdahebfqjgknloris", 21, 1, S::npos);
+    test(S("qeindtagmokpfhsclrbj"), "apnkeqthrmlbfodiscgj", 21, 10, S::npos);
+    test(S("kpfegbjhsrnodltqciam"), "jdgictpframeoqlsbknh", 21, 19, S::npos);
+    test(S("hnbrcplsjfgiktoedmaq"), "qprlsfojamgndekthibc", 21, 20, S::npos);
+}
+
+int main(int, char**)
+{
+    {
+    typedef std::string_view S;
+    test0<S>();
+    test1<S>();
+    test2<S>();
+    test3<S>();
+    }
+
+#if TEST_STD_VER > 11
+    {
+    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
+    constexpr SV  sv1;
+    constexpr SV  sv2 { "abcde", 5 };
+
+    static_assert (sv1.find_first_of( "",      0, 0) == SV::npos, "" );
+    static_assert (sv1.find_first_of( "irkhs", 0, 5) == SV::npos, "" );
+    static_assert (sv2.find_first_of( "",      0, 0) == SV::npos, "" );
+    static_assert (sv2.find_first_of( "gfsrt", 0, 5) == SV::npos, "" );
+    static_assert (sv2.find_first_of( "lecar", 0, 5) == 0, "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.find/find_first_of_string_view_size.pass.cpp

@@ -0,0 +1,155 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// size_type find_first_of(const basic_string_view& str, size_type pos = 0) const;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+
+template <class S>
+void
+test(const S& s, const S& str, typename S::size_type pos, typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.find_first_of(str, pos));
+    assert(s.find_first_of(str, pos) == x);
+    if (x != S::npos)
+        assert(pos <= x && x < s.size());
+}
+
+template <class S>
+void
+test(const S& s, const S& str, typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.find_first_of(str));
+    assert(s.find_first_of(str) == x);
+    if (x != S::npos)
+        assert(x < s.size());
+}
+
+template <class S>
+void test0()
+{
+    test(S(""), S(""), 0, S::npos);
+    test(S(""), S("laenf"), 0, S::npos);
+    test(S(""), S("pqlnkmbdjo"), 0, S::npos);
+    test(S(""), S("qkamfogpnljdcshbreti"), 0, S::npos);
+    test(S(""), S(""), 1, S::npos);
+    test(S(""), S("bjaht"), 1, S::npos);
+    test(S(""), S("hjlcmgpket"), 1, S::npos);
+    test(S(""), S("htaobedqikfplcgjsmrn"), 1, S::npos);
+    test(S("fodgq"), S(""), 0, S::npos);
+    test(S("qanej"), S("dfkap"), 0, 1);
+    test(S("clbao"), S("ihqrfebgad"), 0, 2);
+    test(S("mekdn"), S("ngtjfcalbseiqrphmkdo"), 0, 0);
+    test(S("srdfq"), S(""), 1, S::npos);
+    test(S("oemth"), S("ikcrq"), 1, S::npos);
+    test(S("cdaih"), S("dmajblfhsg"), 1, 1);
+    test(S("qohtk"), S("oqftjhdmkgsblacenirp"), 1, 1);
+    test(S("cshmd"), S(""), 2, S::npos);
+    test(S("lhcdo"), S("oebqi"), 2, 4);
+    test(S("qnsoh"), S("kojhpmbsfe"), 2, 2);
+    test(S("pkrof"), S("acbsjqogpltdkhinfrem"), 2, 2);
+    test(S("fmtsp"), S(""), 4, S::npos);
+    test(S("khbpm"), S("aobjd"), 4, S::npos);
+    test(S("pbsji"), S("pcbahntsje"), 4, S::npos);
+    test(S("mprdj"), S("fhepcrntkoagbmldqijs"), 4, 4);
+    test(S("eqmpa"), S(""), 5, S::npos);
+    test(S("omigs"), S("kocgb"), 5, S::npos);
+    test(S("onmje"), S("fbslrjiqkm"), 5, S::npos);
+    test(S("oqmrj"), S("jeidpcmalhfnqbgtrsko"), 5, S::npos);
+    test(S("schfa"), S(""), 6, S::npos);
+    test(S("igdsc"), S("qngpd"), 6, S::npos);
+    test(S("brqgo"), S("rodhqklgmb"), 6, S::npos);
+    test(S("tnrph"), S("thdjgafrlbkoiqcspmne"), 6, S::npos);
+    test(S("hcjitbfapl"), S(""), 0, S::npos);
+    test(S("daiprenocl"), S("ashjd"), 0, 0);
+    test(S("litpcfdghe"), S("mgojkldsqh"), 0, 0);
+    test(S("aidjksrolc"), S("imqnaghkfrdtlopbjesc"), 0, 0);
+    test(S("qpghtfbaji"), S(""), 1, S::npos);
+    test(S("gfshlcmdjr"), S("nadkh"), 1, 3);
+    test(S("nkodajteqp"), S("ofdrqmkebl"), 1, 1);
+    test(S("gbmetiprqd"), S("bdfjqgatlksriohemnpc"), 1, 1);
+    test(S("crnklpmegd"), S(""), 5, S::npos);
+    test(S("jsbtafedoc"), S("prqgn"), 5, S::npos);
+    test(S("qnmodrtkeb"), S("pejafmnokr"), 5, 5);
+    test(S("cpebqsfmnj"), S("odnqkgijrhabfmcestlp"), 5, 5);
+    test(S("lmofqdhpki"), S(""), 9, S::npos);
+    test(S("hnefkqimca"), S("rtjpa"), 9, 9);
+    test(S("drtasbgmfp"), S("ktsrmnqagd"), 9, S::npos);
+    test(S("lsaijeqhtr"), S("rtdhgcisbnmoaqkfpjle"), 9, 9);
+    test(S("elgofjmbrq"), S(""), 10, S::npos);
+    test(S("mjqdgalkpc"), S("dplqa"), 10, S::npos);
+    test(S("kthqnfcerm"), S("dkacjoptns"), 10, S::npos);
+    test(S("dfsjhanorc"), S("hqfimtrgnbekpdcsjalo"), 10, S::npos);
+    test(S("eqsgalomhb"), S(""), 11, S::npos);
+    test(S("akiteljmoh"), S("lofbc"), 11, S::npos);
+    test(S("hlbdfreqjo"), S("astoegbfpn"), 11, S::npos);
+    test(S("taqobhlerg"), S("pdgreqomsncafklhtibj"), 11, S::npos);
+    test(S("snafbdlghrjkpqtoceim"), S(""), 0, S::npos);
+    test(S("aemtbrgcklhndjisfpoq"), S("lbtqd"), 0, 3);
+    test(S("pnracgfkjdiholtbqsem"), S("tboimldpjh"), 0, 0);
+    test(S("dicfltehbsgrmojnpkaq"), S("slcerthdaiqjfnobgkpm"), 0, 0);
+    test(S("jlnkraeodhcspfgbqitm"), S(""), 1, S::npos);
+    test(S("lhosrngtmfjikbqpcade"), S("aqibs"), 1, 3);
+    test(S("rbtaqjhgkneisldpmfoc"), S("gtfblmqinc"), 1, 1);
+    test(S("gpifsqlrdkbonjtmheca"), S("mkqpbtdalgniorhfescj"), 1, 1);
+    test(S("hdpkobnsalmcfijregtq"), S(""), 10, S::npos);
+    test(S("jtlshdgqaiprkbcoenfm"), S("pblas"), 10, 10);
+    test(S("fkdrbqltsgmcoiphneaj"), S("arosdhcfme"), 10, 10);
+    test(S("crsplifgtqedjohnabmk"), S("blkhjeogicatqfnpdmsr"), 10, 10);
+    test(S("niptglfbosehkamrdqcj"), S(""), 19, S::npos);
+    test(S("copqdhstbingamjfkler"), S("djkqc"), 19, S::npos);
+    test(S("mrtaefilpdsgocnhqbjk"), S("lgokshjtpb"), 19, 19);
+    test(S("kojatdhlcmigpbfrqnes"), S("bqjhtkfepimcnsgrlado"), 19, 19);
+    test(S("eaintpchlqsbdgrkjofm"), S(""), 20, S::npos);
+    test(S("gjnhidfsepkrtaqbmclo"), S("nocfa"), 20, S::npos);
+    test(S("spocfaktqdbiejlhngmr"), S("bgtajmiedc"), 20, S::npos);
+    test(S("rphmlekgfscndtaobiqj"), S("lsckfnqgdahejiopbtmr"), 20, S::npos);
+    test(S("liatsqdoegkmfcnbhrpj"), S(""), 21, S::npos);
+    test(S("binjagtfldkrspcomqeh"), S("gfsrt"), 21, S::npos);
+    test(S("latkmisecnorjbfhqpdg"), S("pfsocbhjtm"), 21, S::npos);
+    test(S("lecfratdjkhnsmqpoigb"), S("tpflmdnoicjgkberhqsa"), 21, S::npos);
+}
+
+template <class S>
+void test1()
+{
+    test(S(""), S(""), S::npos);
+    test(S(""), S("laenf"), S::npos);
+    test(S(""), S("pqlnkmbdjo"), S::npos);
+    test(S(""), S("qkamfogpnljdcshbreti"), S::npos);
+    test(S("nhmko"), S(""), S::npos);
+    test(S("lahfb"), S("irkhs"), 2);
+    test(S("gmfhd"), S("kantesmpgj"), 0);
+    test(S("odaft"), S("oknlrstdpiqmjbaghcfe"), 0);
+    test(S("eolhfgpjqk"), S(""), S::npos);
+    test(S("nbatdlmekr"), S("bnrpe"), 0);
+    test(S("jdmciepkaq"), S("jtdaefblso"), 0);
+    test(S("hkbgspoflt"), S("oselktgbcapndfjihrmq"), 0);
+    test(S("gprdcokbnjhlsfmtieqa"), S(""), S::npos);
+    test(S("qjghlnftcaismkropdeb"), S("bjaht"), 1);
+    test(S("pnalfrdtkqcmojiesbhg"), S("hjlcmgpket"), 0);
+    test(S("pniotcfrhqsmgdkjbael"), S("htaobedqikfplcgjsmrn"), 0);
+}
+
+int main(int, char**)
+{
+    {
+    typedef std::string_view S;
+    test0<S>();
+    test1<S>();
+    }
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.find/find_last_not_of_char_size.pass.cpp

@@ -0,0 +1,88 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// size_type find_last_not_of(charT c, size_type pos = npos) const;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+
+template <class S>
+void
+test(const S& s, typename S::value_type c, typename S::size_type pos,
+     typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.find_last_not_of(c, pos));
+    assert(s.find_last_not_of(c, pos) == x);
+    if (x != S::npos)
+        assert(x <= pos && x < s.size());
+}
+
+template <class S>
+void
+test(const S& s, typename S::value_type c, typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.find_last_not_of(c));
+    assert(s.find_last_not_of(c) == x);
+    if (x != S::npos)
+        assert(x < s.size());
+}
+
+int main(int, char**)
+{
+    {
+    typedef std::string_view S;
+    test(S(""), 'i', 0, S::npos);
+    test(S(""), 'i', 1, S::npos);
+    test(S("kitcj"), 'i', 0, 0);
+    test(S("qkamf"), 'i', 1, 1);
+    test(S("nhmko"), 'i', 2, 2);
+    test(S("tpsaf"), 'i', 4, 4);
+    test(S("lahfb"), 'i', 5, 4);
+    test(S("irkhs"), 'i', 6, 4);
+    test(S("gmfhdaipsr"), 'i', 0, 0);
+    test(S("kantesmpgj"), 'i', 1, 1);
+    test(S("odaftiegpm"), 'i', 5, 4);
+    test(S("oknlrstdpi"), 'i', 9, 8);
+    test(S("eolhfgpjqk"), 'i', 10, 9);
+    test(S("pcdrofikas"), 'i', 11, 9);
+    test(S("nbatdlmekrgcfqsophij"), 'i', 0, 0);
+    test(S("bnrpehidofmqtcksjgla"), 'i', 1, 1);
+    test(S("jdmciepkaqgotsrfnhlb"), 'i', 10, 10);
+    test(S("jtdaefblsokrmhpgcnqi"), 'i', 19, 18);
+    test(S("hkbgspofltajcnedqmri"), 'i', 20, 18);
+    test(S("oselktgbcapndfjihrmq"), 'i', 21, 19);
+
+    test(S(""), 'i', S::npos);
+    test(S("csope"), 'i', 4);
+    test(S("gfsmthlkon"), 'i', 9);
+    test(S("laenfsbridchgotmkqpj"), 'i', 19);
+    }
+
+#if TEST_STD_VER > 11
+    {
+    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
+    constexpr SV  sv1;
+    constexpr SV  sv2 { "abcde", 5 };
+
+    static_assert (sv1.find_last_not_of( 'i', 0 ) == SV::npos, "" );
+    static_assert (sv1.find_last_not_of( 'i', 1 ) == SV::npos, "" );
+    static_assert (sv2.find_last_not_of( 'a', 0 ) == SV::npos, "" );
+    static_assert (sv2.find_last_not_of( 'a', 1 ) == 1, "" );
+    static_assert (sv2.find_last_not_of( 'e', 5 ) == 3, "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.find/find_last_not_of_pointer_size.pass.cpp

@@ -0,0 +1,170 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// constexpr size_type find_last_not_of(const charT* s, size_type pos = npos) const;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+
+template <class S>
+void
+test(const S& s, const typename S::value_type* str, typename S::size_type pos,
+     typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.find_last_not_of(str, pos));
+    assert(s.find_last_not_of(str, pos) == x);
+    if (x != S::npos)
+        assert(x <= pos && x < s.size());
+}
+
+template <class S>
+void
+test(const S& s, const typename S::value_type* str, typename S::size_type x)
+{
+    assert(s.find_last_not_of(str) == x);
+    if (x != S::npos)
+        assert(x < s.size());
+}
+
+template <class S>
+void test0()
+{
+    test(S(""), "", 0, S::npos);
+    test(S(""), "laenf", 0, S::npos);
+    test(S(""), "pqlnkmbdjo", 0, S::npos);
+    test(S(""), "qkamfogpnljdcshbreti", 0, S::npos);
+    test(S(""), "", 1, S::npos);
+    test(S(""), "bjaht", 1, S::npos);
+    test(S(""), "hjlcmgpket", 1, S::npos);
+    test(S(""), "htaobedqikfplcgjsmrn", 1, S::npos);
+    test(S("fodgq"), "", 0, 0);
+    test(S("qanej"), "dfkap", 0, 0);
+    test(S("clbao"), "ihqrfebgad", 0, 0);
+    test(S("mekdn"), "ngtjfcalbseiqrphmkdo", 0, S::npos);
+    test(S("srdfq"), "", 1, 1);
+    test(S("oemth"), "ikcrq", 1, 1);
+    test(S("cdaih"), "dmajblfhsg", 1, 0);
+    test(S("qohtk"), "oqftjhdmkgsblacenirp", 1, S::npos);
+    test(S("cshmd"), "", 2, 2);
+    test(S("lhcdo"), "oebqi", 2, 2);
+    test(S("qnsoh"), "kojhpmbsfe", 2, 1);
+    test(S("pkrof"), "acbsjqogpltdkhinfrem", 2, S::npos);
+    test(S("fmtsp"), "", 4, 4);
+    test(S("khbpm"), "aobjd", 4, 4);
+    test(S("pbsji"), "pcbahntsje", 4, 4);
+    test(S("mprdj"), "fhepcrntkoagbmldqijs", 4, S::npos);
+    test(S("eqmpa"), "", 5, 4);
+    test(S("omigs"), "kocgb", 5, 4);
+    test(S("onmje"), "fbslrjiqkm", 5, 4);
+    test(S("oqmrj"), "jeidpcmalhfnqbgtrsko", 5, S::npos);
+    test(S("schfa"), "", 6, 4);
+    test(S("igdsc"), "qngpd", 6, 4);
+    test(S("brqgo"), "rodhqklgmb", 6, S::npos);
+    test(S("tnrph"), "thdjgafrlbkoiqcspmne", 6, S::npos);
+    test(S("hcjitbfapl"), "", 0, 0);
+    test(S("daiprenocl"), "ashjd", 0, S::npos);
+    test(S("litpcfdghe"), "mgojkldsqh", 0, S::npos);
+    test(S("aidjksrolc"), "imqnaghkfrdtlopbjesc", 0, S::npos);
+    test(S("qpghtfbaji"), "", 1, 1);
+    test(S("gfshlcmdjr"), "nadkh", 1, 1);
+    test(S("nkodajteqp"), "ofdrqmkebl", 1, 0);
+    test(S("gbmetiprqd"), "bdfjqgatlksriohemnpc", 1, S::npos);
+    test(S("crnklpmegd"), "", 5, 5);
+    test(S("jsbtafedoc"), "prqgn", 5, 5);
+    test(S("qnmodrtkeb"), "pejafmnokr", 5, 4);
+    test(S("cpebqsfmnj"), "odnqkgijrhabfmcestlp", 5, S::npos);
+    test(S("lmofqdhpki"), "", 9, 9);
+    test(S("hnefkqimca"), "rtjpa", 9, 8);
+    test(S("drtasbgmfp"), "ktsrmnqagd", 9, 9);
+    test(S("lsaijeqhtr"), "rtdhgcisbnmoaqkfpjle", 9, S::npos);
+    test(S("elgofjmbrq"), "", 10, 9);
+    test(S("mjqdgalkpc"), "dplqa", 10, 9);
+    test(S("kthqnfcerm"), "dkacjoptns", 10, 9);
+    test(S("dfsjhanorc"), "hqfimtrgnbekpdcsjalo", 10, S::npos);
+    test(S("eqsgalomhb"), "", 11, 9);
+    test(S("akiteljmoh"), "lofbc", 11, 9);
+    test(S("hlbdfreqjo"), "astoegbfpn", 11, 8);
+    test(S("taqobhlerg"), "pdgreqomsncafklhtibj", 11, S::npos);
+    test(S("snafbdlghrjkpqtoceim"), "", 0, 0);
+    test(S("aemtbrgcklhndjisfpoq"), "lbtqd", 0, 0);
+    test(S("pnracgfkjdiholtbqsem"), "tboimldpjh", 0, S::npos);
+    test(S("dicfltehbsgrmojnpkaq"), "slcerthdaiqjfnobgkpm", 0, S::npos);
+    test(S("jlnkraeodhcspfgbqitm"), "", 1, 1);
+    test(S("lhosrngtmfjikbqpcade"), "aqibs", 1, 1);
+    test(S("rbtaqjhgkneisldpmfoc"), "gtfblmqinc", 1, 0);
+    test(S("gpifsqlrdkbonjtmheca"), "mkqpbtdalgniorhfescj", 1, S::npos);
+    test(S("hdpkobnsalmcfijregtq"), "", 10, 10);
+    test(S("jtlshdgqaiprkbcoenfm"), "pblas", 10, 9);
+    test(S("fkdrbqltsgmcoiphneaj"), "arosdhcfme", 10, 9);
+    test(S("crsplifgtqedjohnabmk"), "blkhjeogicatqfnpdmsr", 10, S::npos);
+    test(S("niptglfbosehkamrdqcj"), "", 19, 19);
+    test(S("copqdhstbingamjfkler"), "djkqc", 19, 19);
+    test(S("mrtaefilpdsgocnhqbjk"), "lgokshjtpb", 19, 16);
+    test(S("kojatdhlcmigpbfrqnes"), "bqjhtkfepimcnsgrlado", 19, S::npos);
+    test(S("eaintpchlqsbdgrkjofm"), "", 20, 19);
+    test(S("gjnhidfsepkrtaqbmclo"), "nocfa", 20, 18);
+    test(S("spocfaktqdbiejlhngmr"), "bgtajmiedc", 20, 19);
+    test(S("rphmlekgfscndtaobiqj"), "lsckfnqgdahejiopbtmr", 20, S::npos);
+    test(S("liatsqdoegkmfcnbhrpj"), "", 21, 19);
+    test(S("binjagtfldkrspcomqeh"), "gfsrt", 21, 19);
+    test(S("latkmisecnorjbfhqpdg"), "pfsocbhjtm", 21, 19);
+    test(S("lecfratdjkhnsmqpoigb"), "tpflmdnoicjgkberhqsa", 21, S::npos);
+}
+
+template <class S>
+void test1()
+{
+    test(S(""), "", S::npos);
+    test(S(""), "laenf", S::npos);
+    test(S(""), "pqlnkmbdjo", S::npos);
+    test(S(""), "qkamfogpnljdcshbreti", S::npos);
+    test(S("nhmko"), "", 4);
+    test(S("lahfb"), "irkhs", 4);
+    test(S("gmfhd"), "kantesmpgj", 4);
+    test(S("odaft"), "oknlrstdpiqmjbaghcfe", S::npos);
+    test(S("eolhfgpjqk"), "", 9);
+    test(S("nbatdlmekr"), "bnrpe", 8);
+    test(S("jdmciepkaq"), "jtdaefblso", 9);
+    test(S("hkbgspoflt"), "oselktgbcapndfjihrmq", S::npos);
+    test(S("gprdcokbnjhlsfmtieqa"), "", 19);
+    test(S("qjghlnftcaismkropdeb"), "bjaht", 18);
+    test(S("pnalfrdtkqcmojiesbhg"), "hjlcmgpket", 17);
+    test(S("pniotcfrhqsmgdkjbael"), "htaobedqikfplcgjsmrn", S::npos);
+}
+
+int main(int, char**)
+{
+    {
+    typedef std::string_view S;
+    test0<S>();
+    test1<S>();
+    }
+
+#if TEST_STD_VER > 11
+    {
+    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
+    constexpr SV  sv1;
+    constexpr SV  sv2 { "abcde", 5 };
+
+    static_assert (sv1.find_last_not_of( "",      0) == SV::npos, "" );
+    static_assert (sv1.find_last_not_of( "irkhs", 5) == SV::npos, "" );
+    static_assert (sv2.find_last_not_of( "",      0) == 0, "" );
+    static_assert (sv2.find_last_not_of( "gfsrt", 5) == 4, "" );
+    static_assert (sv2.find_last_not_of( "lecar", 5) == 3, "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.find/find_last_not_of_pointer_size_size.pass.cpp

@@ -0,0 +1,397 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// constexpr size_type find_last_not_of(const charT* s, size_type pos, size_type n) const;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+
+template <class S>
+void
+test(const S& s, const typename S::value_type* str, typename S::size_type pos,
+     typename S::size_type n, typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.find_last_not_of(str, pos, n));
+    assert(s.find_last_not_of(str, pos, n) == x);
+    if (x != S::npos)
+        assert(x <= pos && x < s.size());
+}
+
+template <class S>
+void test0()
+{
+    test(S(""), "", 0, 0, S::npos);
+    test(S(""), "irkhs", 0, 0, S::npos);
+    test(S(""), "kante", 0, 1, S::npos);
+    test(S(""), "oknlr", 0, 2, S::npos);
+    test(S(""), "pcdro", 0, 4, S::npos);
+    test(S(""), "bnrpe", 0, 5, S::npos);
+    test(S(""), "jtdaefblso", 0, 0, S::npos);
+    test(S(""), "oselktgbca", 0, 1, S::npos);
+    test(S(""), "eqgaplhckj", 0, 5, S::npos);
+    test(S(""), "bjahtcmnlp", 0, 9, S::npos);
+    test(S(""), "hjlcmgpket", 0, 10, S::npos);
+    test(S(""), "htaobedqikfplcgjsmrn", 0, 0, S::npos);
+    test(S(""), "hpqiarojkcdlsgnmfetb", 0, 1, S::npos);
+    test(S(""), "dfkaprhjloqetcsimnbg", 0, 10, S::npos);
+    test(S(""), "ihqrfebgadntlpmjksoc", 0, 19, S::npos);
+    test(S(""), "ngtjfcalbseiqrphmkdo", 0, 20, S::npos);
+    test(S(""), "", 1, 0, S::npos);
+    test(S(""), "lbtqd", 1, 0, S::npos);
+    test(S(""), "tboim", 1, 1, S::npos);
+    test(S(""), "slcer", 1, 2, S::npos);
+    test(S(""), "cbjfs", 1, 4, S::npos);
+    test(S(""), "aqibs", 1, 5, S::npos);
+    test(S(""), "gtfblmqinc", 1, 0, S::npos);
+    test(S(""), "mkqpbtdalg", 1, 1, S::npos);
+    test(S(""), "kphatlimcd", 1, 5, S::npos);
+    test(S(""), "pblasqogic", 1, 9, S::npos);
+    test(S(""), "arosdhcfme", 1, 10, S::npos);
+    test(S(""), "blkhjeogicatqfnpdmsr", 1, 0, S::npos);
+    test(S(""), "bmhineprjcoadgstflqk", 1, 1, S::npos);
+    test(S(""), "djkqcmetslnghpbarfoi", 1, 10, S::npos);
+    test(S(""), "lgokshjtpbemarcdqnfi", 1, 19, S::npos);
+    test(S(""), "bqjhtkfepimcnsgrlado", 1, 20, S::npos);
+    test(S("eaint"), "", 0, 0, 0);
+    test(S("binja"), "gfsrt", 0, 0, 0);
+    test(S("latkm"), "pfsoc", 0, 1, 0);
+    test(S("lecfr"), "tpflm", 0, 2, 0);
+    test(S("eqkst"), "sgkec", 0, 4, S::npos);
+    test(S("cdafr"), "romds", 0, 5, 0);
+    test(S("prbhe"), "qhjistlgmr", 0, 0, 0);
+    test(S("lbisk"), "pedfirsglo", 0, 1, 0);
+    test(S("hrlpd"), "aqcoslgrmk", 0, 5, 0);
+    test(S("ehmja"), "dabckmepqj", 0, 9, S::npos);
+    test(S("mhqgd"), "pqscrjthli", 0, 10, 0);
+    test(S("tgklq"), "kfphdcsjqmobliagtren", 0, 0, 0);
+    test(S("bocjs"), "rokpefncljibsdhqtagm", 0, 1, 0);
+    test(S("grbsd"), "afionmkphlebtcjqsgrd", 0, 10, 0);
+    test(S("ofjqr"), "aenmqplidhkofrjbctsg", 0, 19, S::npos);
+    test(S("btlfi"), "osjmbtcadhiklegrpqnf", 0, 20, S::npos);
+    test(S("clrgb"), "", 1, 0, 1);
+    test(S("tjmek"), "osmia", 1, 0, 1);
+    test(S("bgstp"), "ckonl", 1, 1, 1);
+    test(S("hstrk"), "ilcaj", 1, 2, 1);
+    test(S("kmspj"), "lasiq", 1, 4, 1);
+    test(S("tjboh"), "kfqmr", 1, 5, 1);
+    test(S("ilbcj"), "klnitfaobg", 1, 0, 1);
+    test(S("jkngf"), "gjhmdlqikp", 1, 1, 1);
+    test(S("gfcql"), "skbgtahqej", 1, 5, 1);
+    test(S("dqtlg"), "bjsdgtlpkf", 1, 9, 1);
+    test(S("bthpg"), "bjgfmnlkio", 1, 10, 1);
+    test(S("dgsnq"), "lbhepotfsjdqigcnamkr", 1, 0, 1);
+    test(S("rmfhp"), "tebangckmpsrqdlfojhi", 1, 1, 1);
+    test(S("jfdam"), "joflqbdkhtegimscpanr", 1, 10, S::npos);
+    test(S("edapb"), "adpmcohetfbsrjinlqkg", 1, 19, S::npos);
+    test(S("brfsm"), "iacldqjpfnogbsrhmetk", 1, 20, S::npos);
+    test(S("ndrhl"), "", 2, 0, 2);
+    test(S("mrecp"), "otkgb", 2, 0, 2);
+    test(S("qlasf"), "cqsjl", 2, 1, 2);
+    test(S("smaqd"), "dpifl", 2, 2, 2);
+    test(S("hjeni"), "oapht", 2, 4, 2);
+    test(S("ocmfj"), "cifts", 2, 5, 2);
+    test(S("hmftq"), "nmsckbgalo", 2, 0, 2);
+    test(S("fklad"), "tpksqhamle", 2, 1, 2);
+    test(S("dirnm"), "tpdrchmkji", 2, 5, 1);
+    test(S("hrgdc"), "ijagfkblst", 2, 9, 1);
+    test(S("ifakg"), "kpocsignjb", 2, 10, 2);
+    test(S("ebrgd"), "pecqtkjsnbdrialgmohf", 2, 0, 2);
+    test(S("rcjml"), "aiortphfcmkjebgsndql", 2, 1, 2);
+    test(S("peqmt"), "sdbkeamglhipojqftrcn", 2, 10, 2);
+    test(S("frehn"), "ljqncehgmfktroapidbs", 2, 19, S::npos);
+    test(S("tqolf"), "rtcfodilamkbenjghqps", 2, 20, S::npos);
+    test(S("cjgao"), "", 4, 0, 4);
+    test(S("kjplq"), "mabns", 4, 0, 4);
+    test(S("herni"), "bdnrp", 4, 1, 4);
+    test(S("tadrb"), "scidp", 4, 2, 4);
+    test(S("pkfeo"), "agbjl", 4, 4, 4);
+    test(S("hoser"), "jfmpr", 4, 5, 3);
+    test(S("kgrsp"), "rbpefghsmj", 4, 0, 4);
+    test(S("pgejb"), "apsfntdoqc", 4, 1, 4);
+    test(S("thlnq"), "ndkjeisgcl", 4, 5, 4);
+    test(S("nbmit"), "rnfpqatdeo", 4, 9, 3);
+    test(S("jgmib"), "bntjlqrfik", 4, 10, 2);
+    test(S("ncrfj"), "kcrtmpolnaqejghsfdbi", 4, 0, 4);
+    test(S("ncsik"), "lobheanpkmqidsrtcfgj", 4, 1, 4);
+    test(S("sgbfh"), "athdkljcnreqbgpmisof", 4, 10, 3);
+    test(S("dktbn"), "qkdmjialrscpbhefgont", 4, 19, 2);
+    test(S("fthqm"), "dmasojntqleribkgfchp", 4, 20, S::npos);
+    test(S("klopi"), "", 5, 0, 4);
+    test(S("dajhn"), "psthd", 5, 0, 4);
+    test(S("jbgno"), "rpmjd", 5, 1, 4);
+    test(S("hkjae"), "dfsmk", 5, 2, 4);
+}
+
+template <class S>
+void test1()
+{
+    test(S("gbhqo"), "skqne", 5, 4, 4);
+    test(S("ktdor"), "kipnf", 5, 5, 4);
+    test(S("ldprn"), "hmrnqdgifl", 5, 0, 4);
+    test(S("egmjk"), "fsmjcdairn", 5, 1, 4);
+    test(S("armql"), "pcdgltbrfj", 5, 5, 3);
+    test(S("cdhjo"), "aekfctpirg", 5, 9, 4);
+    test(S("jcons"), "ledihrsgpf", 5, 10, 3);
+    test(S("cbrkp"), "mqcklahsbtirgopefndj", 5, 0, 4);
+    test(S("fhgna"), "kmlthaoqgecrnpdbjfis", 5, 1, 4);
+    test(S("ejfcd"), "sfhbamcdptojlkrenqgi", 5, 10, 1);
+    test(S("kqjhe"), "pbniofmcedrkhlstgaqj", 5, 19, 2);
+    test(S("pbdjl"), "mongjratcskbhqiepfdl", 5, 20, S::npos);
+    test(S("gajqn"), "", 6, 0, 4);
+    test(S("stedk"), "hrnat", 6, 0, 4);
+    test(S("tjkaf"), "gsqdt", 6, 1, 4);
+    test(S("dthpe"), "bspkd", 6, 2, 4);
+    test(S("klhde"), "ohcmb", 6, 4, 4);
+    test(S("bhlki"), "heatr", 6, 5, 4);
+    test(S("lqmoh"), "pmblckedfn", 6, 0, 4);
+    test(S("mtqin"), "aceqmsrbik", 6, 1, 4);
+    test(S("dpqbr"), "lmbtdehjrn", 6, 5, 4);
+    test(S("kdhmo"), "teqmcrlgib", 6, 9, 4);
+    test(S("jblqp"), "njolbmspac", 6, 10, 3);
+    test(S("qmjgl"), "pofnhidklamecrbqjgst", 6, 0, 4);
+    test(S("rothp"), "jbhckmtgrqnosafedpli", 6, 1, 4);
+    test(S("ghknq"), "dobntpmqklicsahgjerf", 6, 10, 1);
+    test(S("eopfi"), "tpdshainjkbfoemlrgcq", 6, 19, S::npos);
+    test(S("dsnmg"), "oldpfgeakrnitscbjmqh", 6, 20, S::npos);
+    test(S("jnkrfhotgl"), "", 0, 0, 0);
+    test(S("dltjfngbko"), "rqegt", 0, 0, 0);
+    test(S("bmjlpkiqde"), "dashm", 0, 1, 0);
+    test(S("skrflobnqm"), "jqirk", 0, 2, 0);
+    test(S("jkpldtshrm"), "rckeg", 0, 4, 0);
+    test(S("ghasdbnjqo"), "jscie", 0, 5, 0);
+    test(S("igrkhpbqjt"), "efsphndliq", 0, 0, 0);
+    test(S("ikthdgcamf"), "gdicosleja", 0, 1, 0);
+    test(S("pcofgeniam"), "qcpjibosfl", 0, 5, S::npos);
+    test(S("rlfjgesqhc"), "lrhmefnjcq", 0, 9, S::npos);
+    test(S("itphbqsker"), "dtablcrseo", 0, 10, 0);
+    test(S("skjafcirqm"), "apckjsftedbhgomrnilq", 0, 0, 0);
+    test(S("tcqomarsfd"), "pcbrgflehjtiadnsokqm", 0, 1, 0);
+    test(S("rocfeldqpk"), "nsiadegjklhobrmtqcpf", 0, 10, 0);
+    test(S("cfpegndlkt"), "cpmajdqnolikhgsbretf", 0, 19, S::npos);
+    test(S("fqbtnkeasj"), "jcflkntmgiqrphdosaeb", 0, 20, S::npos);
+    test(S("shbcqnmoar"), "", 1, 0, 1);
+    test(S("bdoshlmfin"), "ontrs", 1, 0, 1);
+    test(S("khfrebnsgq"), "pfkna", 1, 1, 1);
+    test(S("getcrsaoji"), "ekosa", 1, 2, 0);
+    test(S("fjiknedcpq"), "anqhk", 1, 4, 1);
+    test(S("tkejgnafrm"), "jekca", 1, 5, 0);
+    test(S("jnakolqrde"), "ikemsjgacf", 1, 0, 1);
+    test(S("lcjptsmgbe"), "arolgsjkhm", 1, 1, 1);
+    test(S("itfsmcjorl"), "oftkbldhre", 1, 5, 0);
+    test(S("omchkfrjea"), "gbkqdoeftl", 1, 9, 1);
+    test(S("cigfqkated"), "sqcflrgtim", 1, 10, S::npos);
+    test(S("tscenjikml"), "fmhbkislrjdpanogqcet", 1, 0, 1);
+    test(S("qcpaemsinf"), "rnioadktqlgpbcjsmhef", 1, 1, 1);
+    test(S("gltkojeipd"), "oakgtnldpsefihqmjcbr", 1, 10, S::npos);
+    test(S("qistfrgnmp"), "gbnaelosidmcjqktfhpr", 1, 19, S::npos);
+    test(S("bdnpfcqaem"), "akbripjhlosndcmqgfet", 1, 20, S::npos);
+    test(S("ectnhskflp"), "", 5, 0, 5);
+    test(S("fgtianblpq"), "pijag", 5, 0, 5);
+    test(S("mfeqklirnh"), "jrckd", 5, 1, 5);
+    test(S("astedncjhk"), "qcloh", 5, 2, 5);
+    test(S("fhlqgcajbr"), "thlmp", 5, 4, 5);
+    test(S("epfhocmdng"), "qidmo", 5, 5, 5);
+    test(S("apcnsibger"), "lnegpsjqrd", 5, 0, 5);
+    test(S("aqkocrbign"), "rjqdablmfs", 5, 1, 4);
+    test(S("ijsmdtqgce"), "enkgpbsjaq", 5, 5, 5);
+    test(S("clobgsrken"), "kdsgoaijfh", 5, 9, 3);
+    test(S("jbhcfposld"), "trfqgmckbe", 5, 10, 5);
+    test(S("oqnpblhide"), "igetsracjfkdnpoblhqm", 5, 0, 5);
+    test(S("lroeasctif"), "nqctfaogirshlekbdjpm", 5, 1, 5);
+    test(S("bpjlgmiedh"), "csehfgomljdqinbartkp", 5, 10, 1);
+    test(S("pamkeoidrj"), "qahoegcmplkfsjbdnitr", 5, 19, S::npos);
+    test(S("espogqbthk"), "dpteiajrqmsognhlfbkc", 5, 20, S::npos);
+    test(S("shoiedtcjb"), "", 9, 0, 9);
+    test(S("ebcinjgads"), "tqbnh", 9, 0, 9);
+    test(S("dqmregkcfl"), "akmle", 9, 1, 9);
+    test(S("ngcrieqajf"), "iqfkm", 9, 2, 9);
+    test(S("qosmilgnjb"), "tqjsr", 9, 4, 9);
+    test(S("ikabsjtdfl"), "jplqg", 9, 5, 8);
+    test(S("ersmicafdh"), "oilnrbcgtj", 9, 0, 9);
+    test(S("fdnplotmgh"), "morkglpesn", 9, 1, 9);
+    test(S("fdbicojerm"), "dmicerngat", 9, 5, 8);
+    test(S("mbtafndjcq"), "radgeskbtc", 9, 9, 9);
+    test(S("mlenkpfdtc"), "ljikprsmqo", 9, 10, 9);
+    test(S("ahlcifdqgs"), "trqihkcgsjamfdbolnpe", 9, 0, 9);
+    test(S("bgjemaltks"), "lqmthbsrekajgnofcipd", 9, 1, 9);
+    test(S("pdhslbqrfc"), "jtalmedribkgqsopcnfh", 9, 10, 9);
+    test(S("dirhtsnjkc"), "spqfoiclmtagejbndkrh", 9, 19, 3);
+    test(S("dlroktbcja"), "nmotklspigjrdhcfaebq", 9, 20, S::npos);
+    test(S("ncjpmaekbs"), "", 10, 0, 9);
+    test(S("hlbosgmrak"), "hpmsd", 10, 0, 9);
+    test(S("pqfhsgilen"), "qnpor", 10, 1, 9);
+    test(S("gqtjsbdckh"), "otdma", 10, 2, 9);
+    test(S("cfkqpjlegi"), "efhjg", 10, 4, 9);
+    test(S("beanrfodgj"), "odpte", 10, 5, 9);
+    test(S("adtkqpbjfi"), "bctdgfmolr", 10, 0, 9);
+    test(S("iomkfthagj"), "oaklidrbqg", 10, 1, 9);
+}
+
+template <class S>
+void test2()
+{
+    test(S("sdpcilonqj"), "dnjfsagktr", 10, 5, 8);
+    test(S("gtfbdkqeml"), "nejaktmiqg", 10, 9, 9);
+    test(S("bmeqgcdorj"), "pjqonlebsf", 10, 10, 8);
+    test(S("etqlcanmob"), "dshmnbtolcjepgaikfqr", 10, 0, 9);
+    test(S("roqmkbdtia"), "iogfhpabtjkqlrnemcds", 10, 1, 9);
+    test(S("kadsithljf"), "ngridfabjsecpqltkmoh", 10, 10, 7);
+    test(S("sgtkpbfdmh"), "athmknplcgofrqejsdib", 10, 19, 5);
+    test(S("qgmetnabkl"), "ldobhmqcafnjtkeisgrp", 10, 20, S::npos);
+    test(S("cqjohampgd"), "", 11, 0, 9);
+    test(S("hobitmpsan"), "aocjb", 11, 0, 9);
+    test(S("tjehkpsalm"), "jbrnk", 11, 1, 9);
+    test(S("ngfbojitcl"), "tqedg", 11, 2, 9);
+    test(S("rcfkdbhgjo"), "nqskp", 11, 4, 9);
+    test(S("qghptonrea"), "eaqkl", 11, 5, 7);
+    test(S("hnprfgqjdl"), "reaoicljqm", 11, 0, 9);
+    test(S("hlmgabenti"), "lsftgajqpm", 11, 1, 9);
+    test(S("ofcjanmrbs"), "rlpfogmits", 11, 5, 9);
+    test(S("jqedtkornm"), "shkncmiaqj", 11, 9, 7);
+    test(S("rfedlasjmg"), "fpnatrhqgs", 11, 10, 8);
+    test(S("talpqjsgkm"), "sjclemqhnpdbgikarfot", 11, 0, 9);
+    test(S("lrkcbtqpie"), "otcmedjikgsfnqbrhpla", 11, 1, 9);
+    test(S("cipogdskjf"), "bonsaefdqiprkhlgtjcm", 11, 10, 8);
+    test(S("nqedcojahi"), "egpscmahijlfnkrodqtb", 11, 19, S::npos);
+    test(S("hefnrkmctj"), "kmqbfepjthgilscrndoa", 11, 20, S::npos);
+    test(S("atqirnmekfjolhpdsgcb"), "", 0, 0, 0);
+    test(S("echfkmlpribjnqsaogtd"), "prboq", 0, 0, 0);
+    test(S("qnhiftdgcleajbpkrosm"), "fjcqh", 0, 1, 0);
+    test(S("chamfknorbedjitgslpq"), "fmosa", 0, 2, 0);
+    test(S("njhqpibfmtlkaecdrgso"), "qdbok", 0, 4, 0);
+    test(S("ebnghfsqkprmdcljoiat"), "amslg", 0, 5, 0);
+    test(S("letjomsgihfrpqbkancd"), "smpltjneqb", 0, 0, 0);
+    test(S("nblgoipcrqeaktshjdmf"), "flitskrnge", 0, 1, 0);
+    test(S("cehkbngtjoiflqapsmrd"), "pgqihmlbef", 0, 5, 0);
+    test(S("mignapfoklbhcqjetdrs"), "cfpdqjtgsb", 0, 9, 0);
+    test(S("ceatbhlsqjgpnokfrmdi"), "htpsiaflom", 0, 10, 0);
+    test(S("ocihkjgrdelpfnmastqb"), "kpjfiaceghsrdtlbnomq", 0, 0, 0);
+    test(S("noelgschdtbrjfmiqkap"), "qhtbomidljgafneksprc", 0, 1, 0);
+    test(S("dkclqfombepritjnghas"), "nhtjobkcefldimpsaqgr", 0, 10, 0);
+    test(S("miklnresdgbhqcojftap"), "prabcjfqnoeskilmtgdh", 0, 19, S::npos);
+    test(S("htbcigojaqmdkfrnlsep"), "dtrgmchilkasqoebfpjn", 0, 20, S::npos);
+    test(S("febhmqtjanokscdirpgl"), "", 1, 0, 1);
+    test(S("loakbsqjpcrdhftniegm"), "sqome", 1, 0, 1);
+    test(S("reagphsqflbitdcjmkno"), "smfte", 1, 1, 1);
+    test(S("jitlfrqemsdhkopncabg"), "ciboh", 1, 2, 0);
+    test(S("mhtaepscdnrjqgbkifol"), "haois", 1, 4, 0);
+    test(S("tocesrfmnglpbjihqadk"), "abfki", 1, 5, 1);
+    test(S("lpfmctjrhdagneskbqoi"), "frdkocntmq", 1, 0, 1);
+    test(S("lsmqaepkdhncirbtjfgo"), "oasbpedlnr", 1, 1, 1);
+    test(S("epoiqmtldrabnkjhcfsg"), "kltqmhgand", 1, 5, 1);
+    test(S("emgasrilpknqojhtbdcf"), "gdtfjchpmr", 1, 9, 0);
+    test(S("hnfiagdpcklrjetqbsom"), "ponmcqblet", 1, 10, 0);
+    test(S("nsdfebgajhmtricpoklq"), "sgphqdnofeiklatbcmjr", 1, 0, 1);
+    test(S("atjgfsdlpobmeiqhncrk"), "ljqprsmigtfoneadckbh", 1, 1, 1);
+    test(S("sitodfgnrejlahcbmqkp"), "ligeojhafnkmrcsqtbdp", 1, 10, 0);
+    test(S("fraghmbiceknltjpqosd"), "lsimqfnjarbopedkhcgt", 1, 19, S::npos);
+    test(S("pmafenlhqtdbkirjsogc"), "abedmfjlghniorcqptks", 1, 20, S::npos);
+    test(S("pihgmoeqtnakrjslcbfd"), "", 10, 0, 10);
+    test(S("gjdkeprctqblnhiafsom"), "hqtoa", 10, 0, 10);
+    test(S("mkpnblfdsahrcqijteog"), "cahif", 10, 1, 10);
+    test(S("gckarqnelodfjhmbptis"), "kehis", 10, 2, 10);
+    test(S("gqpskidtbclomahnrjfe"), "kdlmh", 10, 4, 9);
+    test(S("pkldjsqrfgitbhmaecno"), "paeql", 10, 5, 10);
+    test(S("aftsijrbeklnmcdqhgop"), "aghoqiefnb", 10, 0, 10);
+    test(S("mtlgdrhafjkbiepqnsoc"), "jrbqaikpdo", 10, 1, 10);
+    test(S("pqgirnaefthokdmbsclj"), "smjonaeqcl", 10, 5, 10);
+    test(S("kpdbgjmtherlsfcqoina"), "eqbdrkcfah", 10, 9, 8);
+    test(S("jrlbothiknqmdgcfasep"), "kapmsienhf", 10, 10, 10);
+    test(S("mjogldqferckabinptsh"), "jpqotrlenfcsbhkaimdg", 10, 0, 10);
+    test(S("apoklnefbhmgqcdrisjt"), "jlbmhnfgtcqprikeados", 10, 1, 10);
+    test(S("ifeopcnrjbhkdgatmqls"), "stgbhfmdaljnpqoicker", 10, 10, 8);
+    test(S("ckqhaiesmjdnrgolbtpf"), "oihcetflbjagdsrkmqpn", 10, 19, S::npos);
+    test(S("bnlgapfimcoterskqdjh"), "adtclebmnpjsrqfkigoh", 10, 20, S::npos);
+    test(S("kgdlrobpmjcthqsafeni"), "", 19, 0, 19);
+    test(S("dfkechomjapgnslbtqir"), "beafg", 19, 0, 19);
+    test(S("rloadknfbqtgmhcsipje"), "iclat", 19, 1, 19);
+    test(S("mgjhkolrnadqbpetcifs"), "rkhnf", 19, 2, 19);
+    test(S("cmlfakiojdrgtbsphqen"), "clshq", 19, 4, 19);
+    test(S("kghbfipeomsntdalrqjc"), "dtcoj", 19, 5, 17);
+    test(S("eldiqckrnmtasbghjfpo"), "rqosnjmfth", 19, 0, 19);
+    test(S("abqjcfedgotihlnspkrm"), "siatdfqglh", 19, 1, 19);
+    test(S("qfbadrtjsimkolcenhpg"), "mrlshtpgjq", 19, 5, 19);
+    test(S("abseghclkjqifmtodrnp"), "adlcskgqjt", 19, 9, 19);
+    test(S("ibmsnlrjefhtdokacqpg"), "drshcjknaf", 19, 10, 19);
+    test(S("mrkfciqjebaponsthldg"), "etsaqroinghpkjdlfcbm", 19, 0, 19);
+    test(S("mjkticdeoqshpalrfbgn"), "sgepdnkqliambtrocfhj", 19, 1, 19);
+    test(S("rqnoclbdejgiphtfsakm"), "nlmcjaqgbsortfdihkpe", 19, 10, 18);
+    test(S("plkqbhmtfaeodjcrsing"), "racfnpmosldibqkghjet", 19, 19, 7);
+    test(S("oegalhmstjrfickpbndq"), "fjhdsctkqeiolagrnmbp", 19, 20, S::npos);
+    test(S("rdtgjcaohpblniekmsfq"), "", 20, 0, 19);
+    test(S("ofkqbnjetrmsaidphglc"), "ejanp", 20, 0, 19);
+    test(S("grkpahljcftesdmonqib"), "odife", 20, 1, 19);
+    test(S("jimlgbhfqkteospardcn"), "okaqd", 20, 2, 19);
+    test(S("gftenihpmslrjkqadcob"), "lcdbi", 20, 4, 18);
+    test(S("bmhldogtckrfsanijepq"), "fsqbj", 20, 5, 18);
+    test(S("nfqkrpjdesabgtlcmoih"), "bigdomnplq", 20, 0, 19);
+    test(S("focalnrpiqmdkstehbjg"), "apiblotgcd", 20, 1, 19);
+    test(S("rhqdspkmebiflcotnjga"), "acfhdenops", 20, 5, 18);
+    test(S("rahdtmsckfboqlpniegj"), "jopdeamcrk", 20, 9, 18);
+    test(S("fbkeiopclstmdqranjhg"), "trqncbkgmh", 20, 10, 17);
+    test(S("lifhpdgmbconstjeqark"), "tomglrkencbsfjqpihda", 20, 0, 19);
+}
+
+template <class S>
+void test3()
+{
+    test(S("pboqganrhedjmltsicfk"), "gbkhdnpoietfcmrslajq", 20, 1, 19);
+    test(S("klchabsimetjnqgorfpd"), "rtfnmbsglkjaichoqedp", 20, 10, 19);
+    test(S("sirfgmjqhctndbklaepo"), "ohkmdpfqbsacrtjnlgei", 20, 19, 1);
+    test(S("rlbdsiceaonqjtfpghkm"), "dlbrteoisgphmkncajfq", 20, 20, S::npos);
+    test(S("ecgdanriptblhjfqskom"), "", 21, 0, 19);
+    test(S("fdmiarlpgcskbhoteqjn"), "sjrlo", 21, 0, 19);
+    test(S("rlbstjqopignecmfadkh"), "qjpor", 21, 1, 19);
+    test(S("grjpqmbshektdolcafni"), "odhfn", 21, 2, 19);
+    test(S("sakfcohtqnibprjmlged"), "qtfin", 21, 4, 19);
+    test(S("mjtdglasihqpocebrfkn"), "hpqfo", 21, 5, 19);
+    test(S("okaplfrntghqbmeicsdj"), "fabmertkos", 21, 0, 19);
+    test(S("sahngemrtcjidqbklfpo"), "brqtgkmaej", 21, 1, 19);
+    test(S("dlmsipcnekhbgoaftqjr"), "nfrdeihsgl", 21, 5, 18);
+    test(S("ahegrmqnoiklpfsdbcjt"), "hlfrosekpi", 21, 9, 19);
+    test(S("hdsjbnmlegtkqripacof"), "atgbkrjdsm", 21, 10, 19);
+    test(S("pcnedrfjihqbalkgtoms"), "blnrptjgqmaifsdkhoec", 21, 0, 19);
+    test(S("qjidealmtpskrbfhocng"), "ctpmdahebfqjgknloris", 21, 1, 19);
+    test(S("qeindtagmokpfhsclrbj"), "apnkeqthrmlbfodiscgj", 21, 10, 19);
+    test(S("kpfegbjhsrnodltqciam"), "jdgictpframeoqlsbknh", 21, 19, 7);
+    test(S("hnbrcplsjfgiktoedmaq"), "qprlsfojamgndekthibc", 21, 20, S::npos);
+}
+
+int main(int, char**)
+{
+    {
+    typedef std::string_view S;
+    test0<S>();
+    test1<S>();
+    test2<S>();
+    test3<S>();
+    }
+
+#if TEST_STD_VER > 11
+    {
+    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
+    constexpr SV  sv1;
+    constexpr SV  sv2 { "abcde", 5 };
+
+    static_assert (sv1.find_last_not_of( "",      0, 0) == SV::npos, "" );
+    static_assert (sv1.find_last_not_of( "irkhs", 0, 5) == SV::npos, "" );
+    static_assert (sv2.find_last_not_of( "",      0, 0) == 0, "" );
+    static_assert (sv2.find_last_not_of( "gfsrt", 5, 0) == 4, "" );
+    static_assert (sv2.find_last_not_of( "lecar", 5, 0) == 4, "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.find/find_last_not_of_string_view_size.pass.cpp

@@ -0,0 +1,155 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// size_type find_last_not_of(const basic_string& str, size_type pos = npos) const;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+
+template <class S>
+void
+test(const S& s, const S& str, typename S::size_type pos, typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.find_last_not_of(str, pos));
+    assert(s.find_last_not_of(str, pos) == x);
+    if (x != S::npos)
+        assert(x <= pos && x < s.size());
+}
+
+template <class S>
+void
+test(const S& s, const S& str, typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.find_last_not_of(str));
+    assert(s.find_last_not_of(str) == x);
+    if (x != S::npos)
+        assert(x < s.size());
+}
+
+template <class S>
+void test0()
+{
+    test(S(""), S(""), 0, S::npos);
+    test(S(""), S("laenf"), 0, S::npos);
+    test(S(""), S("pqlnkmbdjo"), 0, S::npos);
+    test(S(""), S("qkamfogpnljdcshbreti"), 0, S::npos);
+    test(S(""), S(""), 1, S::npos);
+    test(S(""), S("bjaht"), 1, S::npos);
+    test(S(""), S("hjlcmgpket"), 1, S::npos);
+    test(S(""), S("htaobedqikfplcgjsmrn"), 1, S::npos);
+    test(S("fodgq"), S(""), 0, 0);
+    test(S("qanej"), S("dfkap"), 0, 0);
+    test(S("clbao"), S("ihqrfebgad"), 0, 0);
+    test(S("mekdn"), S("ngtjfcalbseiqrphmkdo"), 0, S::npos);
+    test(S("srdfq"), S(""), 1, 1);
+    test(S("oemth"), S("ikcrq"), 1, 1);
+    test(S("cdaih"), S("dmajblfhsg"), 1, 0);
+    test(S("qohtk"), S("oqftjhdmkgsblacenirp"), 1, S::npos);
+    test(S("cshmd"), S(""), 2, 2);
+    test(S("lhcdo"), S("oebqi"), 2, 2);
+    test(S("qnsoh"), S("kojhpmbsfe"), 2, 1);
+    test(S("pkrof"), S("acbsjqogpltdkhinfrem"), 2, S::npos);
+    test(S("fmtsp"), S(""), 4, 4);
+    test(S("khbpm"), S("aobjd"), 4, 4);
+    test(S("pbsji"), S("pcbahntsje"), 4, 4);
+    test(S("mprdj"), S("fhepcrntkoagbmldqijs"), 4, S::npos);
+    test(S("eqmpa"), S(""), 5, 4);
+    test(S("omigs"), S("kocgb"), 5, 4);
+    test(S("onmje"), S("fbslrjiqkm"), 5, 4);
+    test(S("oqmrj"), S("jeidpcmalhfnqbgtrsko"), 5, S::npos);
+    test(S("schfa"), S(""), 6, 4);
+    test(S("igdsc"), S("qngpd"), 6, 4);
+    test(S("brqgo"), S("rodhqklgmb"), 6, S::npos);
+    test(S("tnrph"), S("thdjgafrlbkoiqcspmne"), 6, S::npos);
+    test(S("hcjitbfapl"), S(""), 0, 0);
+    test(S("daiprenocl"), S("ashjd"), 0, S::npos);
+    test(S("litpcfdghe"), S("mgojkldsqh"), 0, S::npos);
+    test(S("aidjksrolc"), S("imqnaghkfrdtlopbjesc"), 0, S::npos);
+    test(S("qpghtfbaji"), S(""), 1, 1);
+    test(S("gfshlcmdjr"), S("nadkh"), 1, 1);
+    test(S("nkodajteqp"), S("ofdrqmkebl"), 1, 0);
+    test(S("gbmetiprqd"), S("bdfjqgatlksriohemnpc"), 1, S::npos);
+    test(S("crnklpmegd"), S(""), 5, 5);
+    test(S("jsbtafedoc"), S("prqgn"), 5, 5);
+    test(S("qnmodrtkeb"), S("pejafmnokr"), 5, 4);
+    test(S("cpebqsfmnj"), S("odnqkgijrhabfmcestlp"), 5, S::npos);
+    test(S("lmofqdhpki"), S(""), 9, 9);
+    test(S("hnefkqimca"), S("rtjpa"), 9, 8);
+    test(S("drtasbgmfp"), S("ktsrmnqagd"), 9, 9);
+    test(S("lsaijeqhtr"), S("rtdhgcisbnmoaqkfpjle"), 9, S::npos);
+    test(S("elgofjmbrq"), S(""), 10, 9);
+    test(S("mjqdgalkpc"), S("dplqa"), 10, 9);
+    test(S("kthqnfcerm"), S("dkacjoptns"), 10, 9);
+    test(S("dfsjhanorc"), S("hqfimtrgnbekpdcsjalo"), 10, S::npos);
+    test(S("eqsgalomhb"), S(""), 11, 9);
+    test(S("akiteljmoh"), S("lofbc"), 11, 9);
+    test(S("hlbdfreqjo"), S("astoegbfpn"), 11, 8);
+    test(S("taqobhlerg"), S("pdgreqomsncafklhtibj"), 11, S::npos);
+    test(S("snafbdlghrjkpqtoceim"), S(""), 0, 0);
+    test(S("aemtbrgcklhndjisfpoq"), S("lbtqd"), 0, 0);
+    test(S("pnracgfkjdiholtbqsem"), S("tboimldpjh"), 0, S::npos);
+    test(S("dicfltehbsgrmojnpkaq"), S("slcerthdaiqjfnobgkpm"), 0, S::npos);
+    test(S("jlnkraeodhcspfgbqitm"), S(""), 1, 1);
+    test(S("lhosrngtmfjikbqpcade"), S("aqibs"), 1, 1);
+    test(S("rbtaqjhgkneisldpmfoc"), S("gtfblmqinc"), 1, 0);
+    test(S("gpifsqlrdkbonjtmheca"), S("mkqpbtdalgniorhfescj"), 1, S::npos);
+    test(S("hdpkobnsalmcfijregtq"), S(""), 10, 10);
+    test(S("jtlshdgqaiprkbcoenfm"), S("pblas"), 10, 9);
+    test(S("fkdrbqltsgmcoiphneaj"), S("arosdhcfme"), 10, 9);
+    test(S("crsplifgtqedjohnabmk"), S("blkhjeogicatqfnpdmsr"), 10, S::npos);
+    test(S("niptglfbosehkamrdqcj"), S(""), 19, 19);
+    test(S("copqdhstbingamjfkler"), S("djkqc"), 19, 19);
+    test(S("mrtaefilpdsgocnhqbjk"), S("lgokshjtpb"), 19, 16);
+    test(S("kojatdhlcmigpbfrqnes"), S("bqjhtkfepimcnsgrlado"), 19, S::npos);
+    test(S("eaintpchlqsbdgrkjofm"), S(""), 20, 19);
+    test(S("gjnhidfsepkrtaqbmclo"), S("nocfa"), 20, 18);
+    test(S("spocfaktqdbiejlhngmr"), S("bgtajmiedc"), 20, 19);
+    test(S("rphmlekgfscndtaobiqj"), S("lsckfnqgdahejiopbtmr"), 20, S::npos);
+    test(S("liatsqdoegkmfcnbhrpj"), S(""), 21, 19);
+    test(S("binjagtfldkrspcomqeh"), S("gfsrt"), 21, 19);
+    test(S("latkmisecnorjbfhqpdg"), S("pfsocbhjtm"), 21, 19);
+    test(S("lecfratdjkhnsmqpoigb"), S("tpflmdnoicjgkberhqsa"), 21, S::npos);
+}
+
+template <class S>
+void test1()
+{
+    test(S(""), S(""), S::npos);
+    test(S(""), S("laenf"), S::npos);
+    test(S(""), S("pqlnkmbdjo"), S::npos);
+    test(S(""), S("qkamfogpnljdcshbreti"), S::npos);
+    test(S("nhmko"), S(""), 4);
+    test(S("lahfb"), S("irkhs"), 4);
+    test(S("gmfhd"), S("kantesmpgj"), 4);
+    test(S("odaft"), S("oknlrstdpiqmjbaghcfe"), S::npos);
+    test(S("eolhfgpjqk"), S(""), 9);
+    test(S("nbatdlmekr"), S("bnrpe"), 8);
+    test(S("jdmciepkaq"), S("jtdaefblso"), 9);
+    test(S("hkbgspoflt"), S("oselktgbcapndfjihrmq"), S::npos);
+    test(S("gprdcokbnjhlsfmtieqa"), S(""), 19);
+    test(S("qjghlnftcaismkropdeb"), S("bjaht"), 18);
+    test(S("pnalfrdtkqcmojiesbhg"), S("hjlcmgpket"), 17);
+    test(S("pniotcfrhqsmgdkjbael"), S("htaobedqikfplcgjsmrn"), S::npos);
+}
+
+int main(int, char**)
+{
+    {
+    typedef std::string_view S;
+    test0<S>();
+    test1<S>();
+    }
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.find/find_last_of_char_size.pass.cpp

@@ -0,0 +1,88 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// constexpr size_type find_last_of(charT c, size_type pos = npos) const;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+
+template <class S>
+void
+test(const S& s, typename S::value_type c, typename S::size_type pos,
+     typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.find_last_of(c, pos));
+    assert(s.find_last_of(c, pos) == x);
+    if (x != S::npos)
+        assert(x <= pos && x < s.size());
+}
+
+template <class S>
+void
+test(const S& s, typename S::value_type c, typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.find_last_of(c));
+    assert(s.find_last_of(c) == x);
+    if (x != S::npos)
+        assert(x < s.size());
+}
+
+int main(int, char**)
+{
+    {
+    typedef std::string_view S;
+    test(S(""), 'm', 0, S::npos);
+    test(S(""), 'm', 1, S::npos);
+    test(S("kitcj"), 'm', 0, S::npos);
+    test(S("qkamf"), 'm', 1, S::npos);
+    test(S("nhmko"), 'm', 2, 2);
+    test(S("tpsaf"), 'm', 4, S::npos);
+    test(S("lahfb"), 'm', 5, S::npos);
+    test(S("irkhs"), 'm', 6, S::npos);
+    test(S("gmfhdaipsr"), 'm', 0, S::npos);
+    test(S("kantesmpgj"), 'm', 1, S::npos);
+    test(S("odaftiegpm"), 'm', 5, S::npos);
+    test(S("oknlrstdpi"), 'm', 9, S::npos);
+    test(S("eolhfgpjqk"), 'm', 10, S::npos);
+    test(S("pcdrofikas"), 'm', 11, S::npos);
+    test(S("nbatdlmekrgcfqsophij"), 'm', 0, S::npos);
+    test(S("bnrpehidofmqtcksjgla"), 'm', 1, S::npos);
+    test(S("jdmciepkaqgotsrfnhlb"), 'm', 10, 2);
+    test(S("jtdaefblsokrmhpgcnqi"), 'm', 19, 12);
+    test(S("hkbgspofltajcnedqmri"), 'm', 20, 17);
+    test(S("oselktgbcapndfjihrmq"), 'm', 21, 18);
+
+    test(S(""), 'm', S::npos);
+    test(S("csope"), 'm', S::npos);
+    test(S("gfsmthlkon"), 'm', 3);
+    test(S("laenfsbridchgotmkqpj"), 'm', 15);
+    }
+
+#if TEST_STD_VER > 11
+    {
+    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
+    constexpr SV  sv1;
+    constexpr SV  sv2 { "abcde", 5 };
+
+    static_assert (sv1.find_last_of( 'i', 0 ) == SV::npos, "" );
+    static_assert (sv1.find_last_of( 'i', 1 ) == SV::npos, "" );
+    static_assert (sv2.find_last_of( 'a', 0 ) == 0, "" );
+    static_assert (sv2.find_last_of( 'a', 1 ) == 0, "" );
+    static_assert (sv2.find_last_of( 'e', 5 ) == 4, "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.find/find_last_of_pointer_size.pass.cpp

@@ -0,0 +1,171 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// constexpr size_type find_last_of(const charT* s, size_type pos = npos) const;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+
+template <class S>
+void
+test(const S& s, const typename S::value_type* str, typename S::size_type pos,
+     typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.find_last_of(str, pos));
+    assert(s.find_last_of(str, pos) == x);
+    if (x != S::npos)
+        assert(x <= pos && x < s.size());
+}
+
+template <class S>
+void
+test(const S& s, const typename S::value_type* str, typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.find_last_of(str));
+    assert(s.find_last_of(str) == x);
+    if (x != S::npos)
+        assert(x < s.size());
+}
+
+template <class S>
+void test0()
+{
+    test(S(""), "", 0, S::npos);
+    test(S(""), "laenf", 0, S::npos);
+    test(S(""), "pqlnkmbdjo", 0, S::npos);
+    test(S(""), "qkamfogpnljdcshbreti", 0, S::npos);
+    test(S(""), "", 1, S::npos);
+    test(S(""), "bjaht", 1, S::npos);
+    test(S(""), "hjlcmgpket", 1, S::npos);
+    test(S(""), "htaobedqikfplcgjsmrn", 1, S::npos);
+    test(S("fodgq"), "", 0, S::npos);
+    test(S("qanej"), "dfkap", 0, S::npos);
+    test(S("clbao"), "ihqrfebgad", 0, S::npos);
+    test(S("mekdn"), "ngtjfcalbseiqrphmkdo", 0, 0);
+    test(S("srdfq"), "", 1, S::npos);
+    test(S("oemth"), "ikcrq", 1, S::npos);
+    test(S("cdaih"), "dmajblfhsg", 1, 1);
+    test(S("qohtk"), "oqftjhdmkgsblacenirp", 1, 1);
+    test(S("cshmd"), "", 2, S::npos);
+    test(S("lhcdo"), "oebqi", 2, S::npos);
+    test(S("qnsoh"), "kojhpmbsfe", 2, 2);
+    test(S("pkrof"), "acbsjqogpltdkhinfrem", 2, 2);
+    test(S("fmtsp"), "", 4, S::npos);
+    test(S("khbpm"), "aobjd", 4, 2);
+    test(S("pbsji"), "pcbahntsje", 4, 3);
+    test(S("mprdj"), "fhepcrntkoagbmldqijs", 4, 4);
+    test(S("eqmpa"), "", 5, S::npos);
+    test(S("omigs"), "kocgb", 5, 3);
+    test(S("onmje"), "fbslrjiqkm", 5, 3);
+    test(S("oqmrj"), "jeidpcmalhfnqbgtrsko", 5, 4);
+    test(S("schfa"), "", 6, S::npos);
+    test(S("igdsc"), "qngpd", 6, 2);
+    test(S("brqgo"), "rodhqklgmb", 6, 4);
+    test(S("tnrph"), "thdjgafrlbkoiqcspmne", 6, 4);
+    test(S("hcjitbfapl"), "", 0, S::npos);
+    test(S("daiprenocl"), "ashjd", 0, 0);
+    test(S("litpcfdghe"), "mgojkldsqh", 0, 0);
+    test(S("aidjksrolc"), "imqnaghkfrdtlopbjesc", 0, 0);
+    test(S("qpghtfbaji"), "", 1, S::npos);
+    test(S("gfshlcmdjr"), "nadkh", 1, S::npos);
+    test(S("nkodajteqp"), "ofdrqmkebl", 1, 1);
+    test(S("gbmetiprqd"), "bdfjqgatlksriohemnpc", 1, 1);
+    test(S("crnklpmegd"), "", 5, S::npos);
+    test(S("jsbtafedoc"), "prqgn", 5, S::npos);
+    test(S("qnmodrtkeb"), "pejafmnokr", 5, 5);
+    test(S("cpebqsfmnj"), "odnqkgijrhabfmcestlp", 5, 5);
+    test(S("lmofqdhpki"), "", 9, S::npos);
+    test(S("hnefkqimca"), "rtjpa", 9, 9);
+    test(S("drtasbgmfp"), "ktsrmnqagd", 9, 7);
+    test(S("lsaijeqhtr"), "rtdhgcisbnmoaqkfpjle", 9, 9);
+    test(S("elgofjmbrq"), "", 10, S::npos);
+    test(S("mjqdgalkpc"), "dplqa", 10, 8);
+    test(S("kthqnfcerm"), "dkacjoptns", 10, 6);
+    test(S("dfsjhanorc"), "hqfimtrgnbekpdcsjalo", 10, 9);
+    test(S("eqsgalomhb"), "", 11, S::npos);
+    test(S("akiteljmoh"), "lofbc", 11, 8);
+    test(S("hlbdfreqjo"), "astoegbfpn", 11, 9);
+    test(S("taqobhlerg"), "pdgreqomsncafklhtibj", 11, 9);
+    test(S("snafbdlghrjkpqtoceim"), "", 0, S::npos);
+    test(S("aemtbrgcklhndjisfpoq"), "lbtqd", 0, S::npos);
+    test(S("pnracgfkjdiholtbqsem"), "tboimldpjh", 0, 0);
+    test(S("dicfltehbsgrmojnpkaq"), "slcerthdaiqjfnobgkpm", 0, 0);
+    test(S("jlnkraeodhcspfgbqitm"), "", 1, S::npos);
+    test(S("lhosrngtmfjikbqpcade"), "aqibs", 1, S::npos);
+    test(S("rbtaqjhgkneisldpmfoc"), "gtfblmqinc", 1, 1);
+    test(S("gpifsqlrdkbonjtmheca"), "mkqpbtdalgniorhfescj", 1, 1);
+    test(S("hdpkobnsalmcfijregtq"), "", 10, S::npos);
+    test(S("jtlshdgqaiprkbcoenfm"), "pblas", 10, 10);
+    test(S("fkdrbqltsgmcoiphneaj"), "arosdhcfme", 10, 10);
+    test(S("crsplifgtqedjohnabmk"), "blkhjeogicatqfnpdmsr", 10, 10);
+    test(S("niptglfbosehkamrdqcj"), "", 19, S::npos);
+    test(S("copqdhstbingamjfkler"), "djkqc", 19, 16);
+    test(S("mrtaefilpdsgocnhqbjk"), "lgokshjtpb", 19, 19);
+    test(S("kojatdhlcmigpbfrqnes"), "bqjhtkfepimcnsgrlado", 19, 19);
+    test(S("eaintpchlqsbdgrkjofm"), "", 20, S::npos);
+    test(S("gjnhidfsepkrtaqbmclo"), "nocfa", 20, 19);
+    test(S("spocfaktqdbiejlhngmr"), "bgtajmiedc", 20, 18);
+    test(S("rphmlekgfscndtaobiqj"), "lsckfnqgdahejiopbtmr", 20, 19);
+    test(S("liatsqdoegkmfcnbhrpj"), "", 21, S::npos);
+    test(S("binjagtfldkrspcomqeh"), "gfsrt", 21, 12);
+    test(S("latkmisecnorjbfhqpdg"), "pfsocbhjtm", 21, 17);
+    test(S("lecfratdjkhnsmqpoigb"), "tpflmdnoicjgkberhqsa", 21, 19);
+}
+
+template <class S>
+void test1()
+{
+    test(S(""), "", S::npos);
+    test(S(""), "laenf", S::npos);
+    test(S(""), "pqlnkmbdjo", S::npos);
+    test(S(""), "qkamfogpnljdcshbreti", S::npos);
+    test(S("nhmko"), "", S::npos);
+    test(S("lahfb"), "irkhs", 2);
+    test(S("gmfhd"), "kantesmpgj", 1);
+    test(S("odaft"), "oknlrstdpiqmjbaghcfe", 4);
+    test(S("eolhfgpjqk"), "", S::npos);
+    test(S("nbatdlmekr"), "bnrpe", 9);
+    test(S("jdmciepkaq"), "jtdaefblso", 8);
+    test(S("hkbgspoflt"), "oselktgbcapndfjihrmq", 9);
+    test(S("gprdcokbnjhlsfmtieqa"), "", S::npos);
+    test(S("qjghlnftcaismkropdeb"), "bjaht", 19);
+    test(S("pnalfrdtkqcmojiesbhg"), "hjlcmgpket", 19);
+    test(S("pniotcfrhqsmgdkjbael"), "htaobedqikfplcgjsmrn", 19);
+}
+
+int main(int, char**)
+{
+    {
+    typedef std::string_view S;
+    test0<S>();
+    test1<S>();
+    }
+
+#if TEST_STD_VER > 11
+    {
+    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
+    constexpr SV  sv1;
+    constexpr SV  sv2 { "abcde", 5 };
+
+    static_assert (sv1.find_last_of( "",      0) == SV::npos, "" );
+    static_assert (sv1.find_last_of( "irkhs", 5) == SV::npos, "" );
+    static_assert (sv2.find_last_of( "",      0) == SV::npos, "" );
+    static_assert (sv2.find_last_of( "gfsrt", 5) == SV::npos, "" );
+    static_assert (sv2.find_last_of( "lecar", 5) == 4, "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.find/find_last_of_pointer_size_size.pass.cpp

@@ -0,0 +1,397 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// constexpr size_type find_last_of(const charT* s, size_type pos, size_type n) const;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+
+template <class S>
+void
+test(const S& s, const typename S::value_type* str, typename S::size_type pos,
+     typename S::size_type n, typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.find_last_of(str, pos, n));
+    assert(s.find_last_of(str, pos, n) == x);
+    if (x != S::npos)
+        assert(x <= pos && x < s.size());
+}
+
+template <class S>
+void test0()
+{
+    test(S(""), "", 0, 0, S::npos);
+    test(S(""), "irkhs", 0, 0, S::npos);
+    test(S(""), "kante", 0, 1, S::npos);
+    test(S(""), "oknlr", 0, 2, S::npos);
+    test(S(""), "pcdro", 0, 4, S::npos);
+    test(S(""), "bnrpe", 0, 5, S::npos);
+    test(S(""), "jtdaefblso", 0, 0, S::npos);
+    test(S(""), "oselktgbca", 0, 1, S::npos);
+    test(S(""), "eqgaplhckj", 0, 5, S::npos);
+    test(S(""), "bjahtcmnlp", 0, 9, S::npos);
+    test(S(""), "hjlcmgpket", 0, 10, S::npos);
+    test(S(""), "htaobedqikfplcgjsmrn", 0, 0, S::npos);
+    test(S(""), "hpqiarojkcdlsgnmfetb", 0, 1, S::npos);
+    test(S(""), "dfkaprhjloqetcsimnbg", 0, 10, S::npos);
+    test(S(""), "ihqrfebgadntlpmjksoc", 0, 19, S::npos);
+    test(S(""), "ngtjfcalbseiqrphmkdo", 0, 20, S::npos);
+    test(S(""), "", 1, 0, S::npos);
+    test(S(""), "lbtqd", 1, 0, S::npos);
+    test(S(""), "tboim", 1, 1, S::npos);
+    test(S(""), "slcer", 1, 2, S::npos);
+    test(S(""), "cbjfs", 1, 4, S::npos);
+    test(S(""), "aqibs", 1, 5, S::npos);
+    test(S(""), "gtfblmqinc", 1, 0, S::npos);
+    test(S(""), "mkqpbtdalg", 1, 1, S::npos);
+    test(S(""), "kphatlimcd", 1, 5, S::npos);
+    test(S(""), "pblasqogic", 1, 9, S::npos);
+    test(S(""), "arosdhcfme", 1, 10, S::npos);
+    test(S(""), "blkhjeogicatqfnpdmsr", 1, 0, S::npos);
+    test(S(""), "bmhineprjcoadgstflqk", 1, 1, S::npos);
+    test(S(""), "djkqcmetslnghpbarfoi", 1, 10, S::npos);
+    test(S(""), "lgokshjtpbemarcdqnfi", 1, 19, S::npos);
+    test(S(""), "bqjhtkfepimcnsgrlado", 1, 20, S::npos);
+    test(S("eaint"), "", 0, 0, S::npos);
+    test(S("binja"), "gfsrt", 0, 0, S::npos);
+    test(S("latkm"), "pfsoc", 0, 1, S::npos);
+    test(S("lecfr"), "tpflm", 0, 2, S::npos);
+    test(S("eqkst"), "sgkec", 0, 4, 0);
+    test(S("cdafr"), "romds", 0, 5, S::npos);
+    test(S("prbhe"), "qhjistlgmr", 0, 0, S::npos);
+    test(S("lbisk"), "pedfirsglo", 0, 1, S::npos);
+    test(S("hrlpd"), "aqcoslgrmk", 0, 5, S::npos);
+    test(S("ehmja"), "dabckmepqj", 0, 9, 0);
+    test(S("mhqgd"), "pqscrjthli", 0, 10, S::npos);
+    test(S("tgklq"), "kfphdcsjqmobliagtren", 0, 0, S::npos);
+    test(S("bocjs"), "rokpefncljibsdhqtagm", 0, 1, S::npos);
+    test(S("grbsd"), "afionmkphlebtcjqsgrd", 0, 10, S::npos);
+    test(S("ofjqr"), "aenmqplidhkofrjbctsg", 0, 19, 0);
+    test(S("btlfi"), "osjmbtcadhiklegrpqnf", 0, 20, 0);
+    test(S("clrgb"), "", 1, 0, S::npos);
+    test(S("tjmek"), "osmia", 1, 0, S::npos);
+    test(S("bgstp"), "ckonl", 1, 1, S::npos);
+    test(S("hstrk"), "ilcaj", 1, 2, S::npos);
+    test(S("kmspj"), "lasiq", 1, 4, S::npos);
+    test(S("tjboh"), "kfqmr", 1, 5, S::npos);
+    test(S("ilbcj"), "klnitfaobg", 1, 0, S::npos);
+    test(S("jkngf"), "gjhmdlqikp", 1, 1, S::npos);
+    test(S("gfcql"), "skbgtahqej", 1, 5, 0);
+    test(S("dqtlg"), "bjsdgtlpkf", 1, 9, 0);
+    test(S("bthpg"), "bjgfmnlkio", 1, 10, 0);
+    test(S("dgsnq"), "lbhepotfsjdqigcnamkr", 1, 0, S::npos);
+    test(S("rmfhp"), "tebangckmpsrqdlfojhi", 1, 1, S::npos);
+    test(S("jfdam"), "joflqbdkhtegimscpanr", 1, 10, 1);
+    test(S("edapb"), "adpmcohetfbsrjinlqkg", 1, 19, 1);
+    test(S("brfsm"), "iacldqjpfnogbsrhmetk", 1, 20, 1);
+    test(S("ndrhl"), "", 2, 0, S::npos);
+    test(S("mrecp"), "otkgb", 2, 0, S::npos);
+    test(S("qlasf"), "cqsjl", 2, 1, S::npos);
+    test(S("smaqd"), "dpifl", 2, 2, S::npos);
+    test(S("hjeni"), "oapht", 2, 4, 0);
+    test(S("ocmfj"), "cifts", 2, 5, 1);
+    test(S("hmftq"), "nmsckbgalo", 2, 0, S::npos);
+    test(S("fklad"), "tpksqhamle", 2, 1, S::npos);
+    test(S("dirnm"), "tpdrchmkji", 2, 5, 2);
+    test(S("hrgdc"), "ijagfkblst", 2, 9, 2);
+    test(S("ifakg"), "kpocsignjb", 2, 10, 0);
+    test(S("ebrgd"), "pecqtkjsnbdrialgmohf", 2, 0, S::npos);
+    test(S("rcjml"), "aiortphfcmkjebgsndql", 2, 1, S::npos);
+    test(S("peqmt"), "sdbkeamglhipojqftrcn", 2, 10, 1);
+    test(S("frehn"), "ljqncehgmfktroapidbs", 2, 19, 2);
+    test(S("tqolf"), "rtcfodilamkbenjghqps", 2, 20, 2);
+    test(S("cjgao"), "", 4, 0, S::npos);
+    test(S("kjplq"), "mabns", 4, 0, S::npos);
+    test(S("herni"), "bdnrp", 4, 1, S::npos);
+    test(S("tadrb"), "scidp", 4, 2, S::npos);
+    test(S("pkfeo"), "agbjl", 4, 4, S::npos);
+    test(S("hoser"), "jfmpr", 4, 5, 4);
+    test(S("kgrsp"), "rbpefghsmj", 4, 0, S::npos);
+    test(S("pgejb"), "apsfntdoqc", 4, 1, S::npos);
+    test(S("thlnq"), "ndkjeisgcl", 4, 5, 3);
+    test(S("nbmit"), "rnfpqatdeo", 4, 9, 4);
+    test(S("jgmib"), "bntjlqrfik", 4, 10, 4);
+    test(S("ncrfj"), "kcrtmpolnaqejghsfdbi", 4, 0, S::npos);
+    test(S("ncsik"), "lobheanpkmqidsrtcfgj", 4, 1, S::npos);
+    test(S("sgbfh"), "athdkljcnreqbgpmisof", 4, 10, 4);
+    test(S("dktbn"), "qkdmjialrscpbhefgont", 4, 19, 4);
+    test(S("fthqm"), "dmasojntqleribkgfchp", 4, 20, 4);
+    test(S("klopi"), "", 5, 0, S::npos);
+    test(S("dajhn"), "psthd", 5, 0, S::npos);
+    test(S("jbgno"), "rpmjd", 5, 1, S::npos);
+    test(S("hkjae"), "dfsmk", 5, 2, S::npos);
+}
+
+template <class S>
+void test1()
+{
+    test(S("gbhqo"), "skqne", 5, 4, 3);
+    test(S("ktdor"), "kipnf", 5, 5, 0);
+    test(S("ldprn"), "hmrnqdgifl", 5, 0, S::npos);
+    test(S("egmjk"), "fsmjcdairn", 5, 1, S::npos);
+    test(S("armql"), "pcdgltbrfj", 5, 5, 4);
+    test(S("cdhjo"), "aekfctpirg", 5, 9, 0);
+    test(S("jcons"), "ledihrsgpf", 5, 10, 4);
+    test(S("cbrkp"), "mqcklahsbtirgopefndj", 5, 0, S::npos);
+    test(S("fhgna"), "kmlthaoqgecrnpdbjfis", 5, 1, S::npos);
+    test(S("ejfcd"), "sfhbamcdptojlkrenqgi", 5, 10, 4);
+    test(S("kqjhe"), "pbniofmcedrkhlstgaqj", 5, 19, 4);
+    test(S("pbdjl"), "mongjratcskbhqiepfdl", 5, 20, 4);
+    test(S("gajqn"), "", 6, 0, S::npos);
+    test(S("stedk"), "hrnat", 6, 0, S::npos);
+    test(S("tjkaf"), "gsqdt", 6, 1, S::npos);
+    test(S("dthpe"), "bspkd", 6, 2, S::npos);
+    test(S("klhde"), "ohcmb", 6, 4, 2);
+    test(S("bhlki"), "heatr", 6, 5, 1);
+    test(S("lqmoh"), "pmblckedfn", 6, 0, S::npos);
+    test(S("mtqin"), "aceqmsrbik", 6, 1, S::npos);
+    test(S("dpqbr"), "lmbtdehjrn", 6, 5, 3);
+    test(S("kdhmo"), "teqmcrlgib", 6, 9, 3);
+    test(S("jblqp"), "njolbmspac", 6, 10, 4);
+    test(S("qmjgl"), "pofnhidklamecrbqjgst", 6, 0, S::npos);
+    test(S("rothp"), "jbhckmtgrqnosafedpli", 6, 1, S::npos);
+    test(S("ghknq"), "dobntpmqklicsahgjerf", 6, 10, 4);
+    test(S("eopfi"), "tpdshainjkbfoemlrgcq", 6, 19, 4);
+    test(S("dsnmg"), "oldpfgeakrnitscbjmqh", 6, 20, 4);
+    test(S("jnkrfhotgl"), "", 0, 0, S::npos);
+    test(S("dltjfngbko"), "rqegt", 0, 0, S::npos);
+    test(S("bmjlpkiqde"), "dashm", 0, 1, S::npos);
+    test(S("skrflobnqm"), "jqirk", 0, 2, S::npos);
+    test(S("jkpldtshrm"), "rckeg", 0, 4, S::npos);
+    test(S("ghasdbnjqo"), "jscie", 0, 5, S::npos);
+    test(S("igrkhpbqjt"), "efsphndliq", 0, 0, S::npos);
+    test(S("ikthdgcamf"), "gdicosleja", 0, 1, S::npos);
+    test(S("pcofgeniam"), "qcpjibosfl", 0, 5, 0);
+    test(S("rlfjgesqhc"), "lrhmefnjcq", 0, 9, 0);
+    test(S("itphbqsker"), "dtablcrseo", 0, 10, S::npos);
+    test(S("skjafcirqm"), "apckjsftedbhgomrnilq", 0, 0, S::npos);
+    test(S("tcqomarsfd"), "pcbrgflehjtiadnsokqm", 0, 1, S::npos);
+    test(S("rocfeldqpk"), "nsiadegjklhobrmtqcpf", 0, 10, S::npos);
+    test(S("cfpegndlkt"), "cpmajdqnolikhgsbretf", 0, 19, 0);
+    test(S("fqbtnkeasj"), "jcflkntmgiqrphdosaeb", 0, 20, 0);
+    test(S("shbcqnmoar"), "", 1, 0, S::npos);
+    test(S("bdoshlmfin"), "ontrs", 1, 0, S::npos);
+    test(S("khfrebnsgq"), "pfkna", 1, 1, S::npos);
+    test(S("getcrsaoji"), "ekosa", 1, 2, 1);
+    test(S("fjiknedcpq"), "anqhk", 1, 4, S::npos);
+    test(S("tkejgnafrm"), "jekca", 1, 5, 1);
+    test(S("jnakolqrde"), "ikemsjgacf", 1, 0, S::npos);
+    test(S("lcjptsmgbe"), "arolgsjkhm", 1, 1, S::npos);
+    test(S("itfsmcjorl"), "oftkbldhre", 1, 5, 1);
+    test(S("omchkfrjea"), "gbkqdoeftl", 1, 9, 0);
+    test(S("cigfqkated"), "sqcflrgtim", 1, 10, 1);
+    test(S("tscenjikml"), "fmhbkislrjdpanogqcet", 1, 0, S::npos);
+    test(S("qcpaemsinf"), "rnioadktqlgpbcjsmhef", 1, 1, S::npos);
+    test(S("gltkojeipd"), "oakgtnldpsefihqmjcbr", 1, 10, 1);
+    test(S("qistfrgnmp"), "gbnaelosidmcjqktfhpr", 1, 19, 1);
+    test(S("bdnpfcqaem"), "akbripjhlosndcmqgfet", 1, 20, 1);
+    test(S("ectnhskflp"), "", 5, 0, S::npos);
+    test(S("fgtianblpq"), "pijag", 5, 0, S::npos);
+    test(S("mfeqklirnh"), "jrckd", 5, 1, S::npos);
+    test(S("astedncjhk"), "qcloh", 5, 2, S::npos);
+    test(S("fhlqgcajbr"), "thlmp", 5, 4, 2);
+    test(S("epfhocmdng"), "qidmo", 5, 5, 4);
+    test(S("apcnsibger"), "lnegpsjqrd", 5, 0, S::npos);
+    test(S("aqkocrbign"), "rjqdablmfs", 5, 1, 5);
+    test(S("ijsmdtqgce"), "enkgpbsjaq", 5, 5, S::npos);
+    test(S("clobgsrken"), "kdsgoaijfh", 5, 9, 5);
+    test(S("jbhcfposld"), "trfqgmckbe", 5, 10, 4);
+    test(S("oqnpblhide"), "igetsracjfkdnpoblhqm", 5, 0, S::npos);
+    test(S("lroeasctif"), "nqctfaogirshlekbdjpm", 5, 1, S::npos);
+    test(S("bpjlgmiedh"), "csehfgomljdqinbartkp", 5, 10, 5);
+    test(S("pamkeoidrj"), "qahoegcmplkfsjbdnitr", 5, 19, 5);
+    test(S("espogqbthk"), "dpteiajrqmsognhlfbkc", 5, 20, 5);
+    test(S("shoiedtcjb"), "", 9, 0, S::npos);
+    test(S("ebcinjgads"), "tqbnh", 9, 0, S::npos);
+    test(S("dqmregkcfl"), "akmle", 9, 1, S::npos);
+    test(S("ngcrieqajf"), "iqfkm", 9, 2, 6);
+    test(S("qosmilgnjb"), "tqjsr", 9, 4, 8);
+    test(S("ikabsjtdfl"), "jplqg", 9, 5, 9);
+    test(S("ersmicafdh"), "oilnrbcgtj", 9, 0, S::npos);
+    test(S("fdnplotmgh"), "morkglpesn", 9, 1, 7);
+    test(S("fdbicojerm"), "dmicerngat", 9, 5, 9);
+    test(S("mbtafndjcq"), "radgeskbtc", 9, 9, 6);
+    test(S("mlenkpfdtc"), "ljikprsmqo", 9, 10, 5);
+    test(S("ahlcifdqgs"), "trqihkcgsjamfdbolnpe", 9, 0, S::npos);
+    test(S("bgjemaltks"), "lqmthbsrekajgnofcipd", 9, 1, 6);
+    test(S("pdhslbqrfc"), "jtalmedribkgqsopcnfh", 9, 10, 7);
+    test(S("dirhtsnjkc"), "spqfoiclmtagejbndkrh", 9, 19, 9);
+    test(S("dlroktbcja"), "nmotklspigjrdhcfaebq", 9, 20, 9);
+    test(S("ncjpmaekbs"), "", 10, 0, S::npos);
+    test(S("hlbosgmrak"), "hpmsd", 10, 0, S::npos);
+    test(S("pqfhsgilen"), "qnpor", 10, 1, 1);
+    test(S("gqtjsbdckh"), "otdma", 10, 2, 2);
+    test(S("cfkqpjlegi"), "efhjg", 10, 4, 7);
+    test(S("beanrfodgj"), "odpte", 10, 5, 7);
+    test(S("adtkqpbjfi"), "bctdgfmolr", 10, 0, S::npos);
+    test(S("iomkfthagj"), "oaklidrbqg", 10, 1, 1);
+}
+
+template <class S>
+void test2()
+{
+    test(S("sdpcilonqj"), "dnjfsagktr", 10, 5, 9);
+    test(S("gtfbdkqeml"), "nejaktmiqg", 10, 9, 8);
+    test(S("bmeqgcdorj"), "pjqonlebsf", 10, 10, 9);
+    test(S("etqlcanmob"), "dshmnbtolcjepgaikfqr", 10, 0, S::npos);
+    test(S("roqmkbdtia"), "iogfhpabtjkqlrnemcds", 10, 1, 8);
+    test(S("kadsithljf"), "ngridfabjsecpqltkmoh", 10, 10, 9);
+    test(S("sgtkpbfdmh"), "athmknplcgofrqejsdib", 10, 19, 9);
+    test(S("qgmetnabkl"), "ldobhmqcafnjtkeisgrp", 10, 20, 9);
+    test(S("cqjohampgd"), "", 11, 0, S::npos);
+    test(S("hobitmpsan"), "aocjb", 11, 0, S::npos);
+    test(S("tjehkpsalm"), "jbrnk", 11, 1, 1);
+    test(S("ngfbojitcl"), "tqedg", 11, 2, 7);
+    test(S("rcfkdbhgjo"), "nqskp", 11, 4, 3);
+    test(S("qghptonrea"), "eaqkl", 11, 5, 9);
+    test(S("hnprfgqjdl"), "reaoicljqm", 11, 0, S::npos);
+    test(S("hlmgabenti"), "lsftgajqpm", 11, 1, 1);
+    test(S("ofcjanmrbs"), "rlpfogmits", 11, 5, 7);
+    test(S("jqedtkornm"), "shkncmiaqj", 11, 9, 9);
+    test(S("rfedlasjmg"), "fpnatrhqgs", 11, 10, 9);
+    test(S("talpqjsgkm"), "sjclemqhnpdbgikarfot", 11, 0, S::npos);
+    test(S("lrkcbtqpie"), "otcmedjikgsfnqbrhpla", 11, 1, S::npos);
+    test(S("cipogdskjf"), "bonsaefdqiprkhlgtjcm", 11, 10, 9);
+    test(S("nqedcojahi"), "egpscmahijlfnkrodqtb", 11, 19, 9);
+    test(S("hefnrkmctj"), "kmqbfepjthgilscrndoa", 11, 20, 9);
+    test(S("atqirnmekfjolhpdsgcb"), "", 0, 0, S::npos);
+    test(S("echfkmlpribjnqsaogtd"), "prboq", 0, 0, S::npos);
+    test(S("qnhiftdgcleajbpkrosm"), "fjcqh", 0, 1, S::npos);
+    test(S("chamfknorbedjitgslpq"), "fmosa", 0, 2, S::npos);
+    test(S("njhqpibfmtlkaecdrgso"), "qdbok", 0, 4, S::npos);
+    test(S("ebnghfsqkprmdcljoiat"), "amslg", 0, 5, S::npos);
+    test(S("letjomsgihfrpqbkancd"), "smpltjneqb", 0, 0, S::npos);
+    test(S("nblgoipcrqeaktshjdmf"), "flitskrnge", 0, 1, S::npos);
+    test(S("cehkbngtjoiflqapsmrd"), "pgqihmlbef", 0, 5, S::npos);
+    test(S("mignapfoklbhcqjetdrs"), "cfpdqjtgsb", 0, 9, S::npos);
+    test(S("ceatbhlsqjgpnokfrmdi"), "htpsiaflom", 0, 10, S::npos);
+    test(S("ocihkjgrdelpfnmastqb"), "kpjfiaceghsrdtlbnomq", 0, 0, S::npos);
+    test(S("noelgschdtbrjfmiqkap"), "qhtbomidljgafneksprc", 0, 1, S::npos);
+    test(S("dkclqfombepritjnghas"), "nhtjobkcefldimpsaqgr", 0, 10, S::npos);
+    test(S("miklnresdgbhqcojftap"), "prabcjfqnoeskilmtgdh", 0, 19, 0);
+    test(S("htbcigojaqmdkfrnlsep"), "dtrgmchilkasqoebfpjn", 0, 20, 0);
+    test(S("febhmqtjanokscdirpgl"), "", 1, 0, S::npos);
+    test(S("loakbsqjpcrdhftniegm"), "sqome", 1, 0, S::npos);
+    test(S("reagphsqflbitdcjmkno"), "smfte", 1, 1, S::npos);
+    test(S("jitlfrqemsdhkopncabg"), "ciboh", 1, 2, 1);
+    test(S("mhtaepscdnrjqgbkifol"), "haois", 1, 4, 1);
+    test(S("tocesrfmnglpbjihqadk"), "abfki", 1, 5, S::npos);
+    test(S("lpfmctjrhdagneskbqoi"), "frdkocntmq", 1, 0, S::npos);
+    test(S("lsmqaepkdhncirbtjfgo"), "oasbpedlnr", 1, 1, S::npos);
+    test(S("epoiqmtldrabnkjhcfsg"), "kltqmhgand", 1, 5, S::npos);
+    test(S("emgasrilpknqojhtbdcf"), "gdtfjchpmr", 1, 9, 1);
+    test(S("hnfiagdpcklrjetqbsom"), "ponmcqblet", 1, 10, 1);
+    test(S("nsdfebgajhmtricpoklq"), "sgphqdnofeiklatbcmjr", 1, 0, S::npos);
+    test(S("atjgfsdlpobmeiqhncrk"), "ljqprsmigtfoneadckbh", 1, 1, S::npos);
+    test(S("sitodfgnrejlahcbmqkp"), "ligeojhafnkmrcsqtbdp", 1, 10, 1);
+    test(S("fraghmbiceknltjpqosd"), "lsimqfnjarbopedkhcgt", 1, 19, 1);
+    test(S("pmafenlhqtdbkirjsogc"), "abedmfjlghniorcqptks", 1, 20, 1);
+    test(S("pihgmoeqtnakrjslcbfd"), "", 10, 0, S::npos);
+    test(S("gjdkeprctqblnhiafsom"), "hqtoa", 10, 0, S::npos);
+    test(S("mkpnblfdsahrcqijteog"), "cahif", 10, 1, S::npos);
+    test(S("gckarqnelodfjhmbptis"), "kehis", 10, 2, 7);
+    test(S("gqpskidtbclomahnrjfe"), "kdlmh", 10, 4, 10);
+    test(S("pkldjsqrfgitbhmaecno"), "paeql", 10, 5, 6);
+    test(S("aftsijrbeklnmcdqhgop"), "aghoqiefnb", 10, 0, S::npos);
+    test(S("mtlgdrhafjkbiepqnsoc"), "jrbqaikpdo", 10, 1, 9);
+    test(S("pqgirnaefthokdmbsclj"), "smjonaeqcl", 10, 5, 5);
+    test(S("kpdbgjmtherlsfcqoina"), "eqbdrkcfah", 10, 9, 10);
+    test(S("jrlbothiknqmdgcfasep"), "kapmsienhf", 10, 10, 9);
+    test(S("mjogldqferckabinptsh"), "jpqotrlenfcsbhkaimdg", 10, 0, S::npos);
+    test(S("apoklnefbhmgqcdrisjt"), "jlbmhnfgtcqprikeados", 10, 1, S::npos);
+    test(S("ifeopcnrjbhkdgatmqls"), "stgbhfmdaljnpqoicker", 10, 10, 10);
+    test(S("ckqhaiesmjdnrgolbtpf"), "oihcetflbjagdsrkmqpn", 10, 19, 10);
+    test(S("bnlgapfimcoterskqdjh"), "adtclebmnpjsrqfkigoh", 10, 20, 10);
+    test(S("kgdlrobpmjcthqsafeni"), "", 19, 0, S::npos);
+    test(S("dfkechomjapgnslbtqir"), "beafg", 19, 0, S::npos);
+    test(S("rloadknfbqtgmhcsipje"), "iclat", 19, 1, 16);
+    test(S("mgjhkolrnadqbpetcifs"), "rkhnf", 19, 2, 7);
+    test(S("cmlfakiojdrgtbsphqen"), "clshq", 19, 4, 16);
+    test(S("kghbfipeomsntdalrqjc"), "dtcoj", 19, 5, 19);
+    test(S("eldiqckrnmtasbghjfpo"), "rqosnjmfth", 19, 0, S::npos);
+    test(S("abqjcfedgotihlnspkrm"), "siatdfqglh", 19, 1, 15);
+    test(S("qfbadrtjsimkolcenhpg"), "mrlshtpgjq", 19, 5, 17);
+    test(S("abseghclkjqifmtodrnp"), "adlcskgqjt", 19, 9, 16);
+    test(S("ibmsnlrjefhtdokacqpg"), "drshcjknaf", 19, 10, 16);
+    test(S("mrkfciqjebaponsthldg"), "etsaqroinghpkjdlfcbm", 19, 0, S::npos);
+    test(S("mjkticdeoqshpalrfbgn"), "sgepdnkqliambtrocfhj", 19, 1, 10);
+    test(S("rqnoclbdejgiphtfsakm"), "nlmcjaqgbsortfdihkpe", 19, 10, 19);
+    test(S("plkqbhmtfaeodjcrsing"), "racfnpmosldibqkghjet", 19, 19, 19);
+    test(S("oegalhmstjrfickpbndq"), "fjhdsctkqeiolagrnmbp", 19, 20, 19);
+    test(S("rdtgjcaohpblniekmsfq"), "", 20, 0, S::npos);
+    test(S("ofkqbnjetrmsaidphglc"), "ejanp", 20, 0, S::npos);
+    test(S("grkpahljcftesdmonqib"), "odife", 20, 1, 15);
+    test(S("jimlgbhfqkteospardcn"), "okaqd", 20, 2, 12);
+    test(S("gftenihpmslrjkqadcob"), "lcdbi", 20, 4, 19);
+    test(S("bmhldogtckrfsanijepq"), "fsqbj", 20, 5, 19);
+    test(S("nfqkrpjdesabgtlcmoih"), "bigdomnplq", 20, 0, S::npos);
+    test(S("focalnrpiqmdkstehbjg"), "apiblotgcd", 20, 1, 3);
+    test(S("rhqdspkmebiflcotnjga"), "acfhdenops", 20, 5, 19);
+    test(S("rahdtmsckfboqlpniegj"), "jopdeamcrk", 20, 9, 19);
+    test(S("fbkeiopclstmdqranjhg"), "trqncbkgmh", 20, 10, 19);
+    test(S("lifhpdgmbconstjeqark"), "tomglrkencbsfjqpihda", 20, 0, S::npos);
+}
+
+template <class S>
+void test3()
+{
+    test(S("pboqganrhedjmltsicfk"), "gbkhdnpoietfcmrslajq", 20, 1, 4);
+    test(S("klchabsimetjnqgorfpd"), "rtfnmbsglkjaichoqedp", 20, 10, 17);
+    test(S("sirfgmjqhctndbklaepo"), "ohkmdpfqbsacrtjnlgei", 20, 19, 19);
+    test(S("rlbdsiceaonqjtfpghkm"), "dlbrteoisgphmkncajfq", 20, 20, 19);
+    test(S("ecgdanriptblhjfqskom"), "", 21, 0, S::npos);
+    test(S("fdmiarlpgcskbhoteqjn"), "sjrlo", 21, 0, S::npos);
+    test(S("rlbstjqopignecmfadkh"), "qjpor", 21, 1, 6);
+    test(S("grjpqmbshektdolcafni"), "odhfn", 21, 2, 13);
+    test(S("sakfcohtqnibprjmlged"), "qtfin", 21, 4, 10);
+    test(S("mjtdglasihqpocebrfkn"), "hpqfo", 21, 5, 17);
+    test(S("okaplfrntghqbmeicsdj"), "fabmertkos", 21, 0, S::npos);
+    test(S("sahngemrtcjidqbklfpo"), "brqtgkmaej", 21, 1, 14);
+    test(S("dlmsipcnekhbgoaftqjr"), "nfrdeihsgl", 21, 5, 19);
+    test(S("ahegrmqnoiklpfsdbcjt"), "hlfrosekpi", 21, 9, 14);
+    test(S("hdsjbnmlegtkqripacof"), "atgbkrjdsm", 21, 10, 16);
+    test(S("pcnedrfjihqbalkgtoms"), "blnrptjgqmaifsdkhoec", 21, 0, S::npos);
+    test(S("qjidealmtpskrbfhocng"), "ctpmdahebfqjgknloris", 21, 1, 17);
+    test(S("qeindtagmokpfhsclrbj"), "apnkeqthrmlbfodiscgj", 21, 10, 17);
+    test(S("kpfegbjhsrnodltqciam"), "jdgictpframeoqlsbknh", 21, 19, 19);
+    test(S("hnbrcplsjfgiktoedmaq"), "qprlsfojamgndekthibc", 21, 20, 19);
+}
+
+int main(int, char**)
+{
+    {
+    typedef std::string_view S;
+    test0<S>();
+    test1<S>();
+    test2<S>();
+    test3<S>();
+    }
+
+#if TEST_STD_VER > 11
+    {
+    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
+    constexpr SV  sv1;
+    constexpr SV  sv2 { "abcde", 5 };
+
+    static_assert (sv1.find_last_of( "",      0, 0) == SV::npos, "" );
+    static_assert (sv1.find_last_of( "irkhs", 0, 5) == SV::npos, "" );
+    static_assert (sv2.find_last_of( "",      0, 0) == SV::npos, "" );
+    static_assert (sv2.find_last_of( "gfsrt", 5, 5) == SV::npos, "" );
+    static_assert (sv2.find_last_of( "lecar", 5, 5) == 4, "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.find/find_last_of_string_view_size.pass.cpp

@@ -0,0 +1,155 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// size_type find_last_of(const basic_string& str, size_type pos = npos) const;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+
+template <class S>
+void
+test(const S& s, const S& str, typename S::size_type pos, typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.find_last_of(str, pos));
+    assert(s.find_last_of(str, pos) == x);
+    if (x != S::npos)
+        assert(x <= pos && x < s.size());
+}
+
+template <class S>
+void
+test(const S& s, const S& str, typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.find_last_of(str));
+    assert(s.find_last_of(str) == x);
+    if (x != S::npos)
+        assert(x < s.size());
+}
+
+template <class S>
+void test0()
+{
+    test(S(""), S(""), 0, S::npos);
+    test(S(""), S("laenf"), 0, S::npos);
+    test(S(""), S("pqlnkmbdjo"), 0, S::npos);
+    test(S(""), S("qkamfogpnljdcshbreti"), 0, S::npos);
+    test(S(""), S(""), 1, S::npos);
+    test(S(""), S("bjaht"), 1, S::npos);
+    test(S(""), S("hjlcmgpket"), 1, S::npos);
+    test(S(""), S("htaobedqikfplcgjsmrn"), 1, S::npos);
+    test(S("fodgq"), S(""), 0, S::npos);
+    test(S("qanej"), S("dfkap"), 0, S::npos);
+    test(S("clbao"), S("ihqrfebgad"), 0, S::npos);
+    test(S("mekdn"), S("ngtjfcalbseiqrphmkdo"), 0, 0);
+    test(S("srdfq"), S(""), 1, S::npos);
+    test(S("oemth"), S("ikcrq"), 1, S::npos);
+    test(S("cdaih"), S("dmajblfhsg"), 1, 1);
+    test(S("qohtk"), S("oqftjhdmkgsblacenirp"), 1, 1);
+    test(S("cshmd"), S(""), 2, S::npos);
+    test(S("lhcdo"), S("oebqi"), 2, S::npos);
+    test(S("qnsoh"), S("kojhpmbsfe"), 2, 2);
+    test(S("pkrof"), S("acbsjqogpltdkhinfrem"), 2, 2);
+    test(S("fmtsp"), S(""), 4, S::npos);
+    test(S("khbpm"), S("aobjd"), 4, 2);
+    test(S("pbsji"), S("pcbahntsje"), 4, 3);
+    test(S("mprdj"), S("fhepcrntkoagbmldqijs"), 4, 4);
+    test(S("eqmpa"), S(""), 5, S::npos);
+    test(S("omigs"), S("kocgb"), 5, 3);
+    test(S("onmje"), S("fbslrjiqkm"), 5, 3);
+    test(S("oqmrj"), S("jeidpcmalhfnqbgtrsko"), 5, 4);
+    test(S("schfa"), S(""), 6, S::npos);
+    test(S("igdsc"), S("qngpd"), 6, 2);
+    test(S("brqgo"), S("rodhqklgmb"), 6, 4);
+    test(S("tnrph"), S("thdjgafrlbkoiqcspmne"), 6, 4);
+    test(S("hcjitbfapl"), S(""), 0, S::npos);
+    test(S("daiprenocl"), S("ashjd"), 0, 0);
+    test(S("litpcfdghe"), S("mgojkldsqh"), 0, 0);
+    test(S("aidjksrolc"), S("imqnaghkfrdtlopbjesc"), 0, 0);
+    test(S("qpghtfbaji"), S(""), 1, S::npos);
+    test(S("gfshlcmdjr"), S("nadkh"), 1, S::npos);
+    test(S("nkodajteqp"), S("ofdrqmkebl"), 1, 1);
+    test(S("gbmetiprqd"), S("bdfjqgatlksriohemnpc"), 1, 1);
+    test(S("crnklpmegd"), S(""), 5, S::npos);
+    test(S("jsbtafedoc"), S("prqgn"), 5, S::npos);
+    test(S("qnmodrtkeb"), S("pejafmnokr"), 5, 5);
+    test(S("cpebqsfmnj"), S("odnqkgijrhabfmcestlp"), 5, 5);
+    test(S("lmofqdhpki"), S(""), 9, S::npos);
+    test(S("hnefkqimca"), S("rtjpa"), 9, 9);
+    test(S("drtasbgmfp"), S("ktsrmnqagd"), 9, 7);
+    test(S("lsaijeqhtr"), S("rtdhgcisbnmoaqkfpjle"), 9, 9);
+    test(S("elgofjmbrq"), S(""), 10, S::npos);
+    test(S("mjqdgalkpc"), S("dplqa"), 10, 8);
+    test(S("kthqnfcerm"), S("dkacjoptns"), 10, 6);
+    test(S("dfsjhanorc"), S("hqfimtrgnbekpdcsjalo"), 10, 9);
+    test(S("eqsgalomhb"), S(""), 11, S::npos);
+    test(S("akiteljmoh"), S("lofbc"), 11, 8);
+    test(S("hlbdfreqjo"), S("astoegbfpn"), 11, 9);
+    test(S("taqobhlerg"), S("pdgreqomsncafklhtibj"), 11, 9);
+    test(S("snafbdlghrjkpqtoceim"), S(""), 0, S::npos);
+    test(S("aemtbrgcklhndjisfpoq"), S("lbtqd"), 0, S::npos);
+    test(S("pnracgfkjdiholtbqsem"), S("tboimldpjh"), 0, 0);
+    test(S("dicfltehbsgrmojnpkaq"), S("slcerthdaiqjfnobgkpm"), 0, 0);
+    test(S("jlnkraeodhcspfgbqitm"), S(""), 1, S::npos);
+    test(S("lhosrngtmfjikbqpcade"), S("aqibs"), 1, S::npos);
+    test(S("rbtaqjhgkneisldpmfoc"), S("gtfblmqinc"), 1, 1);
+    test(S("gpifsqlrdkbonjtmheca"), S("mkqpbtdalgniorhfescj"), 1, 1);
+    test(S("hdpkobnsalmcfijregtq"), S(""), 10, S::npos);
+    test(S("jtlshdgqaiprkbcoenfm"), S("pblas"), 10, 10);
+    test(S("fkdrbqltsgmcoiphneaj"), S("arosdhcfme"), 10, 10);
+    test(S("crsplifgtqedjohnabmk"), S("blkhjeogicatqfnpdmsr"), 10, 10);
+    test(S("niptglfbosehkamrdqcj"), S(""), 19, S::npos);
+    test(S("copqdhstbingamjfkler"), S("djkqc"), 19, 16);
+    test(S("mrtaefilpdsgocnhqbjk"), S("lgokshjtpb"), 19, 19);
+    test(S("kojatdhlcmigpbfrqnes"), S("bqjhtkfepimcnsgrlado"), 19, 19);
+    test(S("eaintpchlqsbdgrkjofm"), S(""), 20, S::npos);
+    test(S("gjnhidfsepkrtaqbmclo"), S("nocfa"), 20, 19);
+    test(S("spocfaktqdbiejlhngmr"), S("bgtajmiedc"), 20, 18);
+    test(S("rphmlekgfscndtaobiqj"), S("lsckfnqgdahejiopbtmr"), 20, 19);
+    test(S("liatsqdoegkmfcnbhrpj"), S(""), 21, S::npos);
+    test(S("binjagtfldkrspcomqeh"), S("gfsrt"), 21, 12);
+    test(S("latkmisecnorjbfhqpdg"), S("pfsocbhjtm"), 21, 17);
+    test(S("lecfratdjkhnsmqpoigb"), S("tpflmdnoicjgkberhqsa"), 21, 19);
+}
+
+template <class S>
+void test1()
+{
+    test(S(""), S(""), S::npos);
+    test(S(""), S("laenf"), S::npos);
+    test(S(""), S("pqlnkmbdjo"), S::npos);
+    test(S(""), S("qkamfogpnljdcshbreti"), S::npos);
+    test(S("nhmko"), S(""), S::npos);
+    test(S("lahfb"), S("irkhs"), 2);
+    test(S("gmfhd"), S("kantesmpgj"), 1);
+    test(S("odaft"), S("oknlrstdpiqmjbaghcfe"), 4);
+    test(S("eolhfgpjqk"), S(""), S::npos);
+    test(S("nbatdlmekr"), S("bnrpe"), 9);
+    test(S("jdmciepkaq"), S("jtdaefblso"), 8);
+    test(S("hkbgspoflt"), S("oselktgbcapndfjihrmq"), 9);
+    test(S("gprdcokbnjhlsfmtieqa"), S(""), S::npos);
+    test(S("qjghlnftcaismkropdeb"), S("bjaht"), 19);
+    test(S("pnalfrdtkqcmojiesbhg"), S("hjlcmgpket"), 19);
+    test(S("pniotcfrhqsmgdkjbael"), S("htaobedqikfplcgjsmrn"), 19);
+}
+
+int main(int, char**)
+{
+    {
+    typedef std::string_view S;
+    test0<S>();
+    test1<S>();
+    }
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.find/find_pointer_size.pass.cpp

@@ -0,0 +1,177 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// constexpr size_type find(const charT* s, size_type pos = 0) const;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+
+template <class S>
+void
+test(const S& s, const typename S::value_type* str, typename S::size_type pos,
+     typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.find(str, pos));
+    assert(s.find(str, pos) == x);
+    if (x != S::npos)
+    {
+        typename S::size_type n = S::traits_type::length(str);
+        assert(pos <= x && x + n <= s.size());
+    }
+}
+
+template <class S>
+void
+test(const S& s, const typename S::value_type* str, typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.find(str));
+    assert(s.find(str) == x);
+    if (x != S::npos)
+    {
+        typename S::size_type n = S::traits_type::length(str);
+        assert(0 <= x && x + n <= s.size());
+    }
+}
+
+template <class S>
+void test0()
+{
+    test(S(""), "", 0, 0);
+    test(S(""), "abcde", 0, S::npos);
+    test(S(""), "abcdeabcde", 0, S::npos);
+    test(S(""), "abcdeabcdeabcdeabcde", 0, S::npos);
+    test(S(""), "", 1, S::npos);
+    test(S(""), "abcde", 1, S::npos);
+    test(S(""), "abcdeabcde", 1, S::npos);
+    test(S(""), "abcdeabcdeabcdeabcde", 1, S::npos);
+    test(S("abcde"), "", 0, 0);
+    test(S("abcde"), "abcde", 0, 0);
+    test(S("abcde"), "abcdeabcde", 0, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 0, S::npos);
+    test(S("abcde"), "", 1, 1);
+    test(S("abcde"), "abcde", 1, S::npos);
+    test(S("abcde"), "abcdeabcde", 1, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 1, S::npos);
+    test(S("abcde"), "", 2, 2);
+    test(S("abcde"), "abcde", 2, S::npos);
+    test(S("abcde"), "abcdeabcde", 2, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 2, S::npos);
+    test(S("abcde"), "", 4, 4);
+    test(S("abcde"), "abcde", 4, S::npos);
+    test(S("abcde"), "abcdeabcde", 4, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 4, S::npos);
+    test(S("abcde"), "", 5, 5);
+    test(S("abcde"), "abcde", 5, S::npos);
+    test(S("abcde"), "abcdeabcde", 5, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 5, S::npos);
+    test(S("abcde"), "", 6, S::npos);
+    test(S("abcde"), "abcde", 6, S::npos);
+    test(S("abcde"), "abcdeabcde", 6, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 6, S::npos);
+    test(S("abcdeabcde"), "", 0, 0);
+    test(S("abcdeabcde"), "abcde", 0, 0);
+    test(S("abcdeabcde"), "abcdeabcde", 0, 0);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 0, S::npos);
+    test(S("abcdeabcde"), "", 1, 1);
+    test(S("abcdeabcde"), "abcde", 1, 5);
+    test(S("abcdeabcde"), "abcdeabcde", 1, S::npos);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 1, S::npos);
+    test(S("abcdeabcde"), "", 5, 5);
+    test(S("abcdeabcde"), "abcde", 5, 5);
+    test(S("abcdeabcde"), "abcdeabcde", 5, S::npos);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 5, S::npos);
+    test(S("abcdeabcde"), "", 9, 9);
+    test(S("abcdeabcde"), "abcde", 9, S::npos);
+    test(S("abcdeabcde"), "abcdeabcde", 9, S::npos);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 9, S::npos);
+    test(S("abcdeabcde"), "", 10, 10);
+    test(S("abcdeabcde"), "abcde", 10, S::npos);
+    test(S("abcdeabcde"), "abcdeabcde", 10, S::npos);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 10, S::npos);
+    test(S("abcdeabcde"), "", 11, S::npos);
+    test(S("abcdeabcde"), "abcde", 11, S::npos);
+    test(S("abcdeabcde"), "abcdeabcde", 11, S::npos);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 11, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "", 0, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 0, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 0, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 0, 0);
+    test(S("abcdeabcdeabcdeabcde"), "", 1, 1);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 1, 5);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 1, 5);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 1, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "", 10, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 10, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 10, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 10, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "", 19, 19);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 19, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 19, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 19, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "", 20, 20);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 20, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 20, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 20, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "", 21, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 21, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 21, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 21, S::npos);
+}
+
+template <class S>
+void test1()
+{
+    test(S(""), "", 0);
+    test(S(""), "abcde", S::npos);
+    test(S(""), "abcdeabcde", S::npos);
+    test(S(""), "abcdeabcdeabcdeabcde", S::npos);
+    test(S("abcde"), "", 0);
+    test(S("abcde"), "abcde", 0);
+    test(S("abcde"), "abcdeabcde", S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", S::npos);
+    test(S("abcdeabcde"), "", 0);
+    test(S("abcdeabcde"), "abcde", 0);
+    test(S("abcdeabcde"), "abcdeabcde", 0);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "", 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 0);
+}
+
+int main(int, char**)
+{
+    {
+    typedef std::string_view S;
+    test0<S>();
+    test1<S>();
+    }
+
+#if TEST_STD_VER > 11
+    {
+    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
+    constexpr SV  sv1;
+    constexpr SV  sv2 { "abcde", 5 };
+
+    static_assert (sv1.find( "") == 0, "" );
+    static_assert (sv1.find( "abcde") == SV::npos, "" );
+    static_assert (sv2.find( "") == 0, "" );
+    static_assert (sv2.find( "abcde") == 0, "" );
+    static_assert (sv2.find( "abcde", 1) == SV::npos, "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.find/find_pointer_size_size.pass.cpp

@@ -0,0 +1,398 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// constexpr size_type find(const charT* s, size_type pos, size_type n) const;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+
+template <class S>
+void
+test(const S& s, const typename S::value_type* str, typename S::size_type pos,
+     typename S::size_type n, typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.find(str, pos, n));
+    assert(s.find(str, pos, n) == x);
+    if (x != S::npos)
+        assert(pos <= x && x + n <= s.size());
+}
+
+template <class S>
+void test0()
+{
+    test(S(""), "", 0, 0, 0);
+    test(S(""), "abcde", 0, 0, 0);
+    test(S(""), "abcde", 0, 1, S::npos);
+    test(S(""), "abcde", 0, 2, S::npos);
+    test(S(""), "abcde", 0, 4, S::npos);
+    test(S(""), "abcde", 0, 5, S::npos);
+    test(S(""), "abcdeabcde", 0, 0, 0);
+    test(S(""), "abcdeabcde", 0, 1, S::npos);
+    test(S(""), "abcdeabcde", 0, 5, S::npos);
+    test(S(""), "abcdeabcde", 0, 9, S::npos);
+    test(S(""), "abcdeabcde", 0, 10, S::npos);
+    test(S(""), "abcdeabcdeabcdeabcde", 0, 0, 0);
+    test(S(""), "abcdeabcdeabcdeabcde", 0, 1, S::npos);
+    test(S(""), "abcdeabcdeabcdeabcde", 0, 10, S::npos);
+    test(S(""), "abcdeabcdeabcdeabcde", 0, 19, S::npos);
+    test(S(""), "abcdeabcdeabcdeabcde", 0, 20, S::npos);
+    test(S(""), "", 1, 0, S::npos);
+    test(S(""), "abcde", 1, 0, S::npos);
+    test(S(""), "abcde", 1, 1, S::npos);
+    test(S(""), "abcde", 1, 2, S::npos);
+    test(S(""), "abcde", 1, 4, S::npos);
+    test(S(""), "abcde", 1, 5, S::npos);
+    test(S(""), "abcdeabcde", 1, 0, S::npos);
+    test(S(""), "abcdeabcde", 1, 1, S::npos);
+    test(S(""), "abcdeabcde", 1, 5, S::npos);
+    test(S(""), "abcdeabcde", 1, 9, S::npos);
+    test(S(""), "abcdeabcde", 1, 10, S::npos);
+    test(S(""), "abcdeabcdeabcdeabcde", 1, 0, S::npos);
+    test(S(""), "abcdeabcdeabcdeabcde", 1, 1, S::npos);
+    test(S(""), "abcdeabcdeabcdeabcde", 1, 10, S::npos);
+    test(S(""), "abcdeabcdeabcdeabcde", 1, 19, S::npos);
+    test(S(""), "abcdeabcdeabcdeabcde", 1, 20, S::npos);
+    test(S("abcde"), "", 0, 0, 0);
+    test(S("abcde"), "abcde", 0, 0, 0);
+    test(S("abcde"), "abcde", 0, 1, 0);
+    test(S("abcde"), "abcde", 0, 2, 0);
+    test(S("abcde"), "abcde", 0, 4, 0);
+    test(S("abcde"), "abcde", 0, 5, 0);
+    test(S("abcde"), "abcdeabcde", 0, 0, 0);
+    test(S("abcde"), "abcdeabcde", 0, 1, 0);
+    test(S("abcde"), "abcdeabcde", 0, 5, 0);
+    test(S("abcde"), "abcdeabcde", 0, 9, S::npos);
+    test(S("abcde"), "abcdeabcde", 0, 10, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 0, 0, 0);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 0, 1, 0);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 0, 10, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 0, 19, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 0, 20, S::npos);
+    test(S("abcde"), "", 1, 0, 1);
+    test(S("abcde"), "abcde", 1, 0, 1);
+    test(S("abcde"), "abcde", 1, 1, S::npos);
+    test(S("abcde"), "abcde", 1, 2, S::npos);
+    test(S("abcde"), "abcde", 1, 4, S::npos);
+    test(S("abcde"), "abcde", 1, 5, S::npos);
+    test(S("abcde"), "abcdeabcde", 1, 0, 1);
+    test(S("abcde"), "abcdeabcde", 1, 1, S::npos);
+    test(S("abcde"), "abcdeabcde", 1, 5, S::npos);
+    test(S("abcde"), "abcdeabcde", 1, 9, S::npos);
+    test(S("abcde"), "abcdeabcde", 1, 10, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 1, 0, 1);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 1, 1, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 1, 10, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 1, 19, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 1, 20, S::npos);
+    test(S("abcde"), "", 2, 0, 2);
+    test(S("abcde"), "abcde", 2, 0, 2);
+    test(S("abcde"), "abcde", 2, 1, S::npos);
+    test(S("abcde"), "abcde", 2, 2, S::npos);
+    test(S("abcde"), "abcde", 2, 4, S::npos);
+    test(S("abcde"), "abcde", 2, 5, S::npos);
+    test(S("abcde"), "abcdeabcde", 2, 0, 2);
+    test(S("abcde"), "abcdeabcde", 2, 1, S::npos);
+    test(S("abcde"), "abcdeabcde", 2, 5, S::npos);
+    test(S("abcde"), "abcdeabcde", 2, 9, S::npos);
+    test(S("abcde"), "abcdeabcde", 2, 10, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 2, 0, 2);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 2, 1, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 2, 10, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 2, 19, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 2, 20, S::npos);
+    test(S("abcde"), "", 4, 0, 4);
+    test(S("abcde"), "abcde", 4, 0, 4);
+    test(S("abcde"), "abcde", 4, 1, S::npos);
+    test(S("abcde"), "abcde", 4, 2, S::npos);
+    test(S("abcde"), "abcde", 4, 4, S::npos);
+    test(S("abcde"), "abcde", 4, 5, S::npos);
+    test(S("abcde"), "abcdeabcde", 4, 0, 4);
+    test(S("abcde"), "abcdeabcde", 4, 1, S::npos);
+    test(S("abcde"), "abcdeabcde", 4, 5, S::npos);
+    test(S("abcde"), "abcdeabcde", 4, 9, S::npos);
+    test(S("abcde"), "abcdeabcde", 4, 10, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 4, 0, 4);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 4, 1, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 4, 10, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 4, 19, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 4, 20, S::npos);
+    test(S("abcde"), "", 5, 0, 5);
+    test(S("abcde"), "abcde", 5, 0, 5);
+    test(S("abcde"), "abcde", 5, 1, S::npos);
+    test(S("abcde"), "abcde", 5, 2, S::npos);
+}
+
+template <class S>
+void test1()
+{
+    test(S("abcde"), "abcde", 5, 4, S::npos);
+    test(S("abcde"), "abcde", 5, 5, S::npos);
+    test(S("abcde"), "abcdeabcde", 5, 0, 5);
+    test(S("abcde"), "abcdeabcde", 5, 1, S::npos);
+    test(S("abcde"), "abcdeabcde", 5, 5, S::npos);
+    test(S("abcde"), "abcdeabcde", 5, 9, S::npos);
+    test(S("abcde"), "abcdeabcde", 5, 10, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 5, 0, 5);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 5, 1, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 5, 10, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 5, 19, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 5, 20, S::npos);
+    test(S("abcde"), "", 6, 0, S::npos);
+    test(S("abcde"), "abcde", 6, 0, S::npos);
+    test(S("abcde"), "abcde", 6, 1, S::npos);
+    test(S("abcde"), "abcde", 6, 2, S::npos);
+    test(S("abcde"), "abcde", 6, 4, S::npos);
+    test(S("abcde"), "abcde", 6, 5, S::npos);
+    test(S("abcde"), "abcdeabcde", 6, 0, S::npos);
+    test(S("abcde"), "abcdeabcde", 6, 1, S::npos);
+    test(S("abcde"), "abcdeabcde", 6, 5, S::npos);
+    test(S("abcde"), "abcdeabcde", 6, 9, S::npos);
+    test(S("abcde"), "abcdeabcde", 6, 10, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 6, 0, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 6, 1, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 6, 10, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 6, 19, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 6, 20, S::npos);
+    test(S("abcdeabcde"), "", 0, 0, 0);
+    test(S("abcdeabcde"), "abcde", 0, 0, 0);
+    test(S("abcdeabcde"), "abcde", 0, 1, 0);
+    test(S("abcdeabcde"), "abcde", 0, 2, 0);
+    test(S("abcdeabcde"), "abcde", 0, 4, 0);
+    test(S("abcdeabcde"), "abcde", 0, 5, 0);
+    test(S("abcdeabcde"), "abcdeabcde", 0, 0, 0);
+    test(S("abcdeabcde"), "abcdeabcde", 0, 1, 0);
+    test(S("abcdeabcde"), "abcdeabcde", 0, 5, 0);
+    test(S("abcdeabcde"), "abcdeabcde", 0, 9, 0);
+    test(S("abcdeabcde"), "abcdeabcde", 0, 10, 0);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 0, 0, 0);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 0, 1, 0);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 0, 10, 0);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 0, 19, S::npos);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 0, 20, S::npos);
+    test(S("abcdeabcde"), "", 1, 0, 1);
+    test(S("abcdeabcde"), "abcde", 1, 0, 1);
+    test(S("abcdeabcde"), "abcde", 1, 1, 5);
+    test(S("abcdeabcde"), "abcde", 1, 2, 5);
+    test(S("abcdeabcde"), "abcde", 1, 4, 5);
+    test(S("abcdeabcde"), "abcde", 1, 5, 5);
+    test(S("abcdeabcde"), "abcdeabcde", 1, 0, 1);
+    test(S("abcdeabcde"), "abcdeabcde", 1, 1, 5);
+    test(S("abcdeabcde"), "abcdeabcde", 1, 5, 5);
+    test(S("abcdeabcde"), "abcdeabcde", 1, 9, S::npos);
+    test(S("abcdeabcde"), "abcdeabcde", 1, 10, S::npos);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 1, 0, 1);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 1, 1, 5);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 1, 10, S::npos);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 1, 19, S::npos);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 1, 20, S::npos);
+    test(S("abcdeabcde"), "", 5, 0, 5);
+    test(S("abcdeabcde"), "abcde", 5, 0, 5);
+    test(S("abcdeabcde"), "abcde", 5, 1, 5);
+    test(S("abcdeabcde"), "abcde", 5, 2, 5);
+    test(S("abcdeabcde"), "abcde", 5, 4, 5);
+    test(S("abcdeabcde"), "abcde", 5, 5, 5);
+    test(S("abcdeabcde"), "abcdeabcde", 5, 0, 5);
+    test(S("abcdeabcde"), "abcdeabcde", 5, 1, 5);
+    test(S("abcdeabcde"), "abcdeabcde", 5, 5, 5);
+    test(S("abcdeabcde"), "abcdeabcde", 5, 9, S::npos);
+    test(S("abcdeabcde"), "abcdeabcde", 5, 10, S::npos);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 5, 0, 5);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 5, 1, 5);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 5, 10, S::npos);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 5, 19, S::npos);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 5, 20, S::npos);
+    test(S("abcdeabcde"), "", 9, 0, 9);
+    test(S("abcdeabcde"), "abcde", 9, 0, 9);
+    test(S("abcdeabcde"), "abcde", 9, 1, S::npos);
+    test(S("abcdeabcde"), "abcde", 9, 2, S::npos);
+    test(S("abcdeabcde"), "abcde", 9, 4, S::npos);
+    test(S("abcdeabcde"), "abcde", 9, 5, S::npos);
+    test(S("abcdeabcde"), "abcdeabcde", 9, 0, 9);
+    test(S("abcdeabcde"), "abcdeabcde", 9, 1, S::npos);
+    test(S("abcdeabcde"), "abcdeabcde", 9, 5, S::npos);
+    test(S("abcdeabcde"), "abcdeabcde", 9, 9, S::npos);
+    test(S("abcdeabcde"), "abcdeabcde", 9, 10, S::npos);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 9, 0, 9);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 9, 1, S::npos);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 9, 10, S::npos);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 9, 19, S::npos);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 9, 20, S::npos);
+    test(S("abcdeabcde"), "", 10, 0, 10);
+    test(S("abcdeabcde"), "abcde", 10, 0, 10);
+    test(S("abcdeabcde"), "abcde", 10, 1, S::npos);
+    test(S("abcdeabcde"), "abcde", 10, 2, S::npos);
+    test(S("abcdeabcde"), "abcde", 10, 4, S::npos);
+    test(S("abcdeabcde"), "abcde", 10, 5, S::npos);
+    test(S("abcdeabcde"), "abcdeabcde", 10, 0, 10);
+    test(S("abcdeabcde"), "abcdeabcde", 10, 1, S::npos);
+}
+
+template <class S>
+void test2()
+{
+    test(S("abcdeabcde"), "abcdeabcde", 10, 5, S::npos);
+    test(S("abcdeabcde"), "abcdeabcde", 10, 9, S::npos);
+    test(S("abcdeabcde"), "abcdeabcde", 10, 10, S::npos);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 10, 0, 10);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 10, 1, S::npos);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 10, 10, S::npos);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 10, 19, S::npos);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 10, 20, S::npos);
+    test(S("abcdeabcde"), "", 11, 0, S::npos);
+    test(S("abcdeabcde"), "abcde", 11, 0, S::npos);
+    test(S("abcdeabcde"), "abcde", 11, 1, S::npos);
+    test(S("abcdeabcde"), "abcde", 11, 2, S::npos);
+    test(S("abcdeabcde"), "abcde", 11, 4, S::npos);
+    test(S("abcdeabcde"), "abcde", 11, 5, S::npos);
+    test(S("abcdeabcde"), "abcdeabcde", 11, 0, S::npos);
+    test(S("abcdeabcde"), "abcdeabcde", 11, 1, S::npos);
+    test(S("abcdeabcde"), "abcdeabcde", 11, 5, S::npos);
+    test(S("abcdeabcde"), "abcdeabcde", 11, 9, S::npos);
+    test(S("abcdeabcde"), "abcdeabcde", 11, 10, S::npos);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 11, 0, S::npos);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 11, 1, S::npos);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 11, 10, S::npos);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 11, 19, S::npos);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 11, 20, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "", 0, 0, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 0, 0, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 0, 1, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 0, 2, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 0, 4, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 0, 5, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 0, 0, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 0, 1, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 0, 5, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 0, 9, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 0, 10, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 0, 0, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 0, 1, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 0, 10, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 0, 19, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 0, 20, 0);
+    test(S("abcdeabcdeabcdeabcde"), "", 1, 0, 1);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 1, 0, 1);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 1, 1, 5);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 1, 2, 5);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 1, 4, 5);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 1, 5, 5);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 1, 0, 1);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 1, 1, 5);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 1, 5, 5);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 1, 9, 5);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 1, 10, 5);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 1, 0, 1);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 1, 1, 5);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 1, 10, 5);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 1, 19, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 1, 20, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "", 10, 0, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 10, 0, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 10, 1, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 10, 2, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 10, 4, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 10, 5, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 10, 0, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 10, 1, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 10, 5, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 10, 9, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 10, 10, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 10, 0, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 10, 1, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 10, 10, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 10, 19, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 10, 20, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "", 19, 0, 19);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 19, 0, 19);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 19, 1, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 19, 2, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 19, 4, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 19, 5, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 19, 0, 19);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 19, 1, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 19, 5, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 19, 9, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 19, 10, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 19, 0, 19);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 19, 1, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 19, 10, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 19, 19, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 19, 20, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "", 20, 0, 20);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 20, 0, 20);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 20, 1, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 20, 2, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 20, 4, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 20, 5, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 20, 0, 20);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 20, 1, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 20, 5, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 20, 9, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 20, 10, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 20, 0, 20);
+}
+
+template <class S>
+void test3()
+{
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 20, 1, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 20, 10, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 20, 19, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 20, 20, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "", 21, 0, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 21, 0, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 21, 1, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 21, 2, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 21, 4, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 21, 5, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 21, 0, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 21, 1, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 21, 5, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 21, 9, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 21, 10, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 21, 0, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 21, 1, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 21, 10, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 21, 19, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 21, 20, S::npos);
+}
+
+int main(int, char**)
+{
+    {
+    typedef std::string_view S;
+    test0<S>();
+    test1<S>();
+    test2<S>();
+    test3<S>();
+    }
+
+#if TEST_STD_VER > 11
+    {
+    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
+    constexpr SV  sv1;
+    constexpr SV  sv2 { "abcde", 5 };
+
+    static_assert (sv1.find( "",      0, 0 ) == 0, "" );
+    static_assert (sv1.find( "abcde", 0, 0 ) == 0, "" );
+    static_assert (sv1.find( "abcde", 0, 1 ) == SV::npos, "" );
+    static_assert (sv2.find( "",      0, 0 ) == 0, "" );
+    static_assert (sv2.find( "abcde", 0, 0 ) == 0, "" );
+    static_assert (sv2.find( "abcde", 0, 1 ) == 0, "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.find/find_string_view_size.pass.cpp

@@ -0,0 +1,170 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// constexpr size_type find(const basic_string_view& str, size_type pos = 0) const;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+
+template <class S>
+void
+test(const S& s, const S& str, typename S::size_type pos, typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.find(str, pos));
+    assert(s.find(str, pos) == x);
+    if (x != S::npos)
+        assert(pos <= x && x + str.size() <= s.size());
+}
+
+template <class S>
+void
+test(const S& s, const S& str, typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.find(str));
+    assert(s.find(str) == x);
+    if (x != S::npos)
+        assert(0 <= x && x + str.size() <= s.size());
+}
+
+template <class S>
+void test0()
+{
+    test(S(""), S(""), 0, 0);
+    test(S(""), S("abcde"), 0, S::npos);
+    test(S(""), S("abcdeabcde"), 0, S::npos);
+    test(S(""), S("abcdeabcdeabcdeabcde"), 0, S::npos);
+    test(S(""), S(""), 1, S::npos);
+    test(S(""), S("abcde"), 1, S::npos);
+    test(S(""), S("abcdeabcde"), 1, S::npos);
+    test(S(""), S("abcdeabcdeabcdeabcde"), 1, S::npos);
+    test(S("abcde"), S(""), 0, 0);
+    test(S("abcde"), S("abcde"), 0, 0);
+    test(S("abcde"), S("abcdeabcde"), 0, S::npos);
+    test(S("abcde"), S("abcdeabcdeabcdeabcde"), 0, S::npos);
+    test(S("abcde"), S(""), 1, 1);
+    test(S("abcde"), S("abcde"), 1, S::npos);
+    test(S("abcde"), S("abcdeabcde"), 1, S::npos);
+    test(S("abcde"), S("abcdeabcdeabcdeabcde"), 1, S::npos);
+    test(S("abcde"), S(""), 2, 2);
+    test(S("abcde"), S("abcde"), 2, S::npos);
+    test(S("abcde"), S("abcdeabcde"), 2, S::npos);
+    test(S("abcde"), S("abcdeabcdeabcdeabcde"), 2, S::npos);
+    test(S("abcde"), S(""), 4, 4);
+    test(S("abcde"), S("abcde"), 4, S::npos);
+    test(S("abcde"), S("abcdeabcde"), 4, S::npos);
+    test(S("abcde"), S("abcdeabcdeabcdeabcde"), 4, S::npos);
+    test(S("abcde"), S(""), 5, 5);
+    test(S("abcde"), S("abcde"), 5, S::npos);
+    test(S("abcde"), S("abcdeabcde"), 5, S::npos);
+    test(S("abcde"), S("abcdeabcdeabcdeabcde"), 5, S::npos);
+    test(S("abcde"), S(""), 6, S::npos);
+    test(S("abcde"), S("abcde"), 6, S::npos);
+    test(S("abcde"), S("abcdeabcde"), 6, S::npos);
+    test(S("abcde"), S("abcdeabcdeabcdeabcde"), 6, S::npos);
+    test(S("abcdeabcde"), S(""), 0, 0);
+    test(S("abcdeabcde"), S("abcde"), 0, 0);
+    test(S("abcdeabcde"), S("abcdeabcde"), 0, 0);
+    test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), 0, S::npos);
+    test(S("abcdeabcde"), S(""), 1, 1);
+    test(S("abcdeabcde"), S("abcde"), 1, 5);
+    test(S("abcdeabcde"), S("abcdeabcde"), 1, S::npos);
+    test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), 1, S::npos);
+    test(S("abcdeabcde"), S(""), 5, 5);
+    test(S("abcdeabcde"), S("abcde"), 5, 5);
+    test(S("abcdeabcde"), S("abcdeabcde"), 5, S::npos);
+    test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), 5, S::npos);
+    test(S("abcdeabcde"), S(""), 9, 9);
+    test(S("abcdeabcde"), S("abcde"), 9, S::npos);
+    test(S("abcdeabcde"), S("abcdeabcde"), 9, S::npos);
+    test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), 9, S::npos);
+    test(S("abcdeabcde"), S(""), 10, 10);
+    test(S("abcdeabcde"), S("abcde"), 10, S::npos);
+    test(S("abcdeabcde"), S("abcdeabcde"), 10, S::npos);
+    test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), 10, S::npos);
+    test(S("abcdeabcde"), S(""), 11, S::npos);
+    test(S("abcdeabcde"), S("abcde"), 11, S::npos);
+    test(S("abcdeabcde"), S("abcdeabcde"), 11, S::npos);
+    test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), 11, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), S(""), 0, 0);
+    test(S("abcdeabcdeabcdeabcde"), S("abcde"), 0, 0);
+    test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 0, 0);
+    test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 0, 0);
+    test(S("abcdeabcdeabcdeabcde"), S(""), 1, 1);
+    test(S("abcdeabcdeabcdeabcde"), S("abcde"), 1, 5);
+    test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 1, 5);
+    test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 1, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), S(""), 10, 10);
+    test(S("abcdeabcdeabcdeabcde"), S("abcde"), 10, 10);
+    test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 10, 10);
+    test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 10, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), S(""), 19, 19);
+    test(S("abcdeabcdeabcdeabcde"), S("abcde"), 19, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 19, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 19, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), S(""), 20, 20);
+    test(S("abcdeabcdeabcdeabcde"), S("abcde"), 20, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 20, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 20, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), S(""), 21, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), S("abcde"), 21, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 21, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 21, S::npos);
+}
+
+template <class S>
+void test1()
+{
+    test(S(""), S(""), 0);
+    test(S(""), S("abcde"), S::npos);
+    test(S(""), S("abcdeabcde"), S::npos);
+    test(S(""), S("abcdeabcdeabcdeabcde"), S::npos);
+    test(S("abcde"), S(""), 0);
+    test(S("abcde"), S("abcde"), 0);
+    test(S("abcde"), S("abcdeabcde"), S::npos);
+    test(S("abcde"), S("abcdeabcdeabcdeabcde"), S::npos);
+    test(S("abcdeabcde"), S(""), 0);
+    test(S("abcdeabcde"), S("abcde"), 0);
+    test(S("abcdeabcde"), S("abcdeabcde"), 0);
+    test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), S::npos);
+    test(S("abcdeabcdeabcdeabcde"), S(""), 0);
+    test(S("abcdeabcdeabcdeabcde"), S("abcde"), 0);
+    test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 0);
+    test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 0);
+}
+
+int main(int, char**)
+{
+    {
+    typedef std::string_view S;
+    test0<S>();
+    test1<S>();
+    }
+
+#if TEST_STD_VER > 11
+    {
+    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
+    constexpr SV  sv1;
+    constexpr SV  sv2 { "abcde", 5 };
+
+    static_assert (sv1.find(sv1) == 0, "" );
+    static_assert (sv1.find(sv2) == SV::npos, "" );
+    static_assert (sv2.find(sv1) == 0, "" );
+    static_assert (sv2.find(sv2) == 0, "" );
+    static_assert (sv2.find(sv2, 1 ) == SV::npos, "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.find/rfind_char_size.pass.cpp

@@ -0,0 +1,89 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+// constexpr size_type rfind(charT c, size_type pos = npos) const;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+
+template <class S>
+void
+test(const S& s, typename S::value_type c, typename S::size_type pos,
+     typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.rfind(c, pos));
+    assert(s.rfind(c, pos) == x);
+    if (x != S::npos)
+        assert(x <= pos && x + 1 <= s.size());
+}
+
+template <class S>
+void
+test(const S& s, typename S::value_type c, typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.rfind(c));
+    assert(s.rfind(c) == x);
+    if (x != S::npos)
+        assert(x + 1 <= s.size());
+}
+
+int main(int, char**)
+{
+    {
+    typedef std::string_view S;
+    test(S(""), 'b', 0, S::npos);
+    test(S(""), 'b', 1, S::npos);
+    test(S("abcde"), 'b', 0, S::npos);
+    test(S("abcde"), 'b', 1, 1);
+    test(S("abcde"), 'b', 2, 1);
+    test(S("abcde"), 'b', 4, 1);
+    test(S("abcde"), 'b', 5, 1);
+    test(S("abcde"), 'b', 6, 1);
+    test(S("abcdeabcde"), 'b', 0, S::npos);
+    test(S("abcdeabcde"), 'b', 1, 1);
+    test(S("abcdeabcde"), 'b', 5, 1);
+    test(S("abcdeabcde"), 'b', 9, 6);
+    test(S("abcdeabcde"), 'b', 10, 6);
+    test(S("abcdeabcde"), 'b', 11, 6);
+    test(S("abcdeabcdeabcdeabcde"), 'b', 0, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), 'b', 1, 1);
+    test(S("abcdeabcdeabcdeabcde"), 'b', 10, 6);
+    test(S("abcdeabcdeabcdeabcde"), 'b', 19, 16);
+    test(S("abcdeabcdeabcdeabcde"), 'b', 20, 16);
+    test(S("abcdeabcdeabcdeabcde"), 'b', 21, 16);
+
+    test(S(""), 'b', S::npos);
+    test(S("abcde"), 'b', 1);
+    test(S("abcdeabcde"), 'b', 6);
+    test(S("abcdeabcdeabcdeabcde"), 'b', 16);
+    }
+
+#if TEST_STD_VER > 11
+    {
+    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
+    constexpr SV  sv1;
+    constexpr SV  sv2 { "abcde", 5 };
+
+    static_assert (sv1.rfind( 'b', 0 ) == SV::npos, "" );
+    static_assert (sv1.rfind( 'b', 1 ) == SV::npos, "" );
+    static_assert (sv2.rfind( 'b', 0 ) == SV::npos, "" );
+    static_assert (sv2.rfind( 'b', 1 ) == 1, "" );
+    static_assert (sv2.rfind( 'b', 2 ) == 1, "" );
+    static_assert (sv2.rfind( 'b', 3 ) == 1, "" );
+    static_assert (sv2.rfind( 'b', 4 ) == 1, "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.find/rfind_pointer_size.pass.cpp

@@ -0,0 +1,177 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+// constexpr size_type rfind(const charT* s, size_type pos = npos) const;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+
+template <class S>
+void
+test(const S& s, const typename S::value_type* str, typename S::size_type pos,
+     typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.rfind(str, pos));
+    assert(s.rfind(str, pos) == x);
+    if (x != S::npos)
+    {
+        typename S::size_type n = S::traits_type::length(str);
+        assert(x <= pos && x + n <= s.size());
+    }
+}
+
+template <class S>
+void
+test(const S& s, const typename S::value_type* str, typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.rfind(str));
+    assert(s.rfind(str) == x);
+    if (x != S::npos)
+    {
+        typename S::size_type pos = s.size();
+        typename S::size_type n = S::traits_type::length(str);
+        assert(x <= pos && x + n <= s.size());
+    }
+}
+
+template <class S>
+void test0()
+{
+    test(S(""), "", 0, 0);
+    test(S(""), "abcde", 0, S::npos);
+    test(S(""), "abcdeabcde", 0, S::npos);
+    test(S(""), "abcdeabcdeabcdeabcde", 0, S::npos);
+    test(S(""), "", 1, 0);
+    test(S(""), "abcde", 1, S::npos);
+    test(S(""), "abcdeabcde", 1, S::npos);
+    test(S(""), "abcdeabcdeabcdeabcde", 1, S::npos);
+    test(S("abcde"), "", 0, 0);
+    test(S("abcde"), "abcde", 0, 0);
+    test(S("abcde"), "abcdeabcde", 0, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 0, S::npos);
+    test(S("abcde"), "", 1, 1);
+    test(S("abcde"), "abcde", 1, 0);
+    test(S("abcde"), "abcdeabcde", 1, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 1, S::npos);
+    test(S("abcde"), "", 2, 2);
+    test(S("abcde"), "abcde", 2, 0);
+    test(S("abcde"), "abcdeabcde", 2, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 2, S::npos);
+    test(S("abcde"), "", 4, 4);
+    test(S("abcde"), "abcde", 4, 0);
+    test(S("abcde"), "abcdeabcde", 4, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 4, S::npos);
+    test(S("abcde"), "", 5, 5);
+    test(S("abcde"), "abcde", 5, 0);
+    test(S("abcde"), "abcdeabcde", 5, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 5, S::npos);
+    test(S("abcde"), "", 6, 5);
+    test(S("abcde"), "abcde", 6, 0);
+    test(S("abcde"), "abcdeabcde", 6, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 6, S::npos);
+    test(S("abcdeabcde"), "", 0, 0);
+    test(S("abcdeabcde"), "abcde", 0, 0);
+    test(S("abcdeabcde"), "abcdeabcde", 0, 0);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 0, S::npos);
+    test(S("abcdeabcde"), "", 1, 1);
+    test(S("abcdeabcde"), "abcde", 1, 0);
+    test(S("abcdeabcde"), "abcdeabcde", 1, 0);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 1, S::npos);
+    test(S("abcdeabcde"), "", 5, 5);
+    test(S("abcdeabcde"), "abcde", 5, 5);
+    test(S("abcdeabcde"), "abcdeabcde", 5, 0);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 5, S::npos);
+    test(S("abcdeabcde"), "", 9, 9);
+    test(S("abcdeabcde"), "abcde", 9, 5);
+    test(S("abcdeabcde"), "abcdeabcde", 9, 0);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 9, S::npos);
+    test(S("abcdeabcde"), "", 10, 10);
+    test(S("abcdeabcde"), "abcde", 10, 5);
+    test(S("abcdeabcde"), "abcdeabcde", 10, 0);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 10, S::npos);
+    test(S("abcdeabcde"), "", 11, 10);
+    test(S("abcdeabcde"), "abcde", 11, 5);
+    test(S("abcdeabcde"), "abcdeabcde", 11, 0);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 11, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "", 0, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 0, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 0, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 0, 0);
+    test(S("abcdeabcdeabcdeabcde"), "", 1, 1);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 1, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 1, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 1, 0);
+    test(S("abcdeabcdeabcdeabcde"), "", 10, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 10, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 10, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 10, 0);
+    test(S("abcdeabcdeabcdeabcde"), "", 19, 19);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 19, 15);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 19, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 19, 0);
+    test(S("abcdeabcdeabcdeabcde"), "", 20, 20);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 20, 15);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 20, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 20, 0);
+    test(S("abcdeabcdeabcdeabcde"), "", 21, 20);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 21, 15);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 21, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 21, 0);
+}
+
+template <class S>
+void test1()
+{
+    test(S(""), "", 0);
+    test(S(""), "abcde", S::npos);
+    test(S(""), "abcdeabcde", S::npos);
+    test(S(""), "abcdeabcdeabcdeabcde", S::npos);
+    test(S("abcde"), "", 5);
+    test(S("abcde"), "abcde", 0);
+    test(S("abcde"), "abcdeabcde", S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", S::npos);
+    test(S("abcdeabcde"), "", 10);
+    test(S("abcdeabcde"), "abcde", 5);
+    test(S("abcdeabcde"), "abcdeabcde", 0);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "", 20);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 15);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 0);
+}
+
+int main(int, char**)
+{
+    {
+    typedef std::string_view S;
+    test0<S>();
+    test1<S>();
+    }
+
+#if TEST_STD_VER > 11
+    {
+    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
+    constexpr SV  sv1;
+    constexpr SV  sv2 { "abcde", 5 };
+
+    static_assert (sv1.rfind( "") == 0, "" );
+    static_assert (sv1.rfind( "abcde") == SV::npos, "" );
+    static_assert (sv2.rfind( "") == 5, "" );
+    static_assert (sv2.rfind( "abcde") == 0, "" );
+    static_assert (sv2.rfind( "abcde", 1) == 0, "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.find/rfind_pointer_size_size.pass.cpp

@@ -0,0 +1,397 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+// constexpr size_type rfind(const charT* s, size_type pos, size_type n) const;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+
+template <class S>
+void
+test(const S& s, const typename S::value_type* str, typename S::size_type pos,
+      typename S::size_type n, typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.rfind(str, pos, n));
+    assert(s.rfind(str, pos, n) == x);
+    if (x != S::npos)
+        assert(x <= pos && x + n <= s.size());
+}
+
+template <class S>
+void test0()
+{
+    test(S(""), "", 0, 0, 0);
+    test(S(""), "abcde", 0, 0, 0);
+    test(S(""), "abcde", 0, 1, S::npos);
+    test(S(""), "abcde", 0, 2, S::npos);
+    test(S(""), "abcde", 0, 4, S::npos);
+    test(S(""), "abcde", 0, 5, S::npos);
+    test(S(""), "abcdeabcde", 0, 0, 0);
+    test(S(""), "abcdeabcde", 0, 1, S::npos);
+    test(S(""), "abcdeabcde", 0, 5, S::npos);
+    test(S(""), "abcdeabcde", 0, 9, S::npos);
+    test(S(""), "abcdeabcde", 0, 10, S::npos);
+    test(S(""), "abcdeabcdeabcdeabcde", 0, 0, 0);
+    test(S(""), "abcdeabcdeabcdeabcde", 0, 1, S::npos);
+    test(S(""), "abcdeabcdeabcdeabcde", 0, 10, S::npos);
+    test(S(""), "abcdeabcdeabcdeabcde", 0, 19, S::npos);
+    test(S(""), "abcdeabcdeabcdeabcde", 0, 20, S::npos);
+    test(S(""), "", 1, 0, 0);
+    test(S(""), "abcde", 1, 0, 0);
+    test(S(""), "abcde", 1, 1, S::npos);
+    test(S(""), "abcde", 1, 2, S::npos);
+    test(S(""), "abcde", 1, 4, S::npos);
+    test(S(""), "abcde", 1, 5, S::npos);
+    test(S(""), "abcdeabcde", 1, 0, 0);
+    test(S(""), "abcdeabcde", 1, 1, S::npos);
+    test(S(""), "abcdeabcde", 1, 5, S::npos);
+    test(S(""), "abcdeabcde", 1, 9, S::npos);
+    test(S(""), "abcdeabcde", 1, 10, S::npos);
+    test(S(""), "abcdeabcdeabcdeabcde", 1, 0, 0);
+    test(S(""), "abcdeabcdeabcdeabcde", 1, 1, S::npos);
+    test(S(""), "abcdeabcdeabcdeabcde", 1, 10, S::npos);
+    test(S(""), "abcdeabcdeabcdeabcde", 1, 19, S::npos);
+    test(S(""), "abcdeabcdeabcdeabcde", 1, 20, S::npos);
+    test(S("abcde"), "", 0, 0, 0);
+    test(S("abcde"), "abcde", 0, 0, 0);
+    test(S("abcde"), "abcde", 0, 1, 0);
+    test(S("abcde"), "abcde", 0, 2, 0);
+    test(S("abcde"), "abcde", 0, 4, 0);
+    test(S("abcde"), "abcde", 0, 5, 0);
+    test(S("abcde"), "abcdeabcde", 0, 0, 0);
+    test(S("abcde"), "abcdeabcde", 0, 1, 0);
+    test(S("abcde"), "abcdeabcde", 0, 5, 0);
+    test(S("abcde"), "abcdeabcde", 0, 9, S::npos);
+    test(S("abcde"), "abcdeabcde", 0, 10, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 0, 0, 0);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 0, 1, 0);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 0, 10, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 0, 19, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 0, 20, S::npos);
+    test(S("abcde"), "", 1, 0, 1);
+    test(S("abcde"), "abcde", 1, 0, 1);
+    test(S("abcde"), "abcde", 1, 1, 0);
+    test(S("abcde"), "abcde", 1, 2, 0);
+    test(S("abcde"), "abcde", 1, 4, 0);
+    test(S("abcde"), "abcde", 1, 5, 0);
+    test(S("abcde"), "abcdeabcde", 1, 0, 1);
+    test(S("abcde"), "abcdeabcde", 1, 1, 0);
+    test(S("abcde"), "abcdeabcde", 1, 5, 0);
+    test(S("abcde"), "abcdeabcde", 1, 9, S::npos);
+    test(S("abcde"), "abcdeabcde", 1, 10, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 1, 0, 1);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 1, 1, 0);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 1, 10, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 1, 19, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 1, 20, S::npos);
+    test(S("abcde"), "", 2, 0, 2);
+    test(S("abcde"), "abcde", 2, 0, 2);
+    test(S("abcde"), "abcde", 2, 1, 0);
+    test(S("abcde"), "abcde", 2, 2, 0);
+    test(S("abcde"), "abcde", 2, 4, 0);
+    test(S("abcde"), "abcde", 2, 5, 0);
+    test(S("abcde"), "abcdeabcde", 2, 0, 2);
+    test(S("abcde"), "abcdeabcde", 2, 1, 0);
+    test(S("abcde"), "abcdeabcde", 2, 5, 0);
+    test(S("abcde"), "abcdeabcde", 2, 9, S::npos);
+    test(S("abcde"), "abcdeabcde", 2, 10, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 2, 0, 2);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 2, 1, 0);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 2, 10, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 2, 19, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 2, 20, S::npos);
+    test(S("abcde"), "", 4, 0, 4);
+    test(S("abcde"), "abcde", 4, 0, 4);
+    test(S("abcde"), "abcde", 4, 1, 0);
+    test(S("abcde"), "abcde", 4, 2, 0);
+    test(S("abcde"), "abcde", 4, 4, 0);
+    test(S("abcde"), "abcde", 4, 5, 0);
+    test(S("abcde"), "abcdeabcde", 4, 0, 4);
+    test(S("abcde"), "abcdeabcde", 4, 1, 0);
+    test(S("abcde"), "abcdeabcde", 4, 5, 0);
+    test(S("abcde"), "abcdeabcde", 4, 9, S::npos);
+    test(S("abcde"), "abcdeabcde", 4, 10, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 4, 0, 4);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 4, 1, 0);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 4, 10, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 4, 19, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 4, 20, S::npos);
+    test(S("abcde"), "", 5, 0, 5);
+    test(S("abcde"), "abcde", 5, 0, 5);
+    test(S("abcde"), "abcde", 5, 1, 0);
+    test(S("abcde"), "abcde", 5, 2, 0);
+}
+
+template <class S>
+void test1()
+{
+    test(S("abcde"), "abcde", 5, 4, 0);
+    test(S("abcde"), "abcde", 5, 5, 0);
+    test(S("abcde"), "abcdeabcde", 5, 0, 5);
+    test(S("abcde"), "abcdeabcde", 5, 1, 0);
+    test(S("abcde"), "abcdeabcde", 5, 5, 0);
+    test(S("abcde"), "abcdeabcde", 5, 9, S::npos);
+    test(S("abcde"), "abcdeabcde", 5, 10, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 5, 0, 5);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 5, 1, 0);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 5, 10, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 5, 19, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 5, 20, S::npos);
+    test(S("abcde"), "", 6, 0, 5);
+    test(S("abcde"), "abcde", 6, 0, 5);
+    test(S("abcde"), "abcde", 6, 1, 0);
+    test(S("abcde"), "abcde", 6, 2, 0);
+    test(S("abcde"), "abcde", 6, 4, 0);
+    test(S("abcde"), "abcde", 6, 5, 0);
+    test(S("abcde"), "abcdeabcde", 6, 0, 5);
+    test(S("abcde"), "abcdeabcde", 6, 1, 0);
+    test(S("abcde"), "abcdeabcde", 6, 5, 0);
+    test(S("abcde"), "abcdeabcde", 6, 9, S::npos);
+    test(S("abcde"), "abcdeabcde", 6, 10, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 6, 0, 5);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 6, 1, 0);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 6, 10, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 6, 19, S::npos);
+    test(S("abcde"), "abcdeabcdeabcdeabcde", 6, 20, S::npos);
+    test(S("abcdeabcde"), "", 0, 0, 0);
+    test(S("abcdeabcde"), "abcde", 0, 0, 0);
+    test(S("abcdeabcde"), "abcde", 0, 1, 0);
+    test(S("abcdeabcde"), "abcde", 0, 2, 0);
+    test(S("abcdeabcde"), "abcde", 0, 4, 0);
+    test(S("abcdeabcde"), "abcde", 0, 5, 0);
+    test(S("abcdeabcde"), "abcdeabcde", 0, 0, 0);
+    test(S("abcdeabcde"), "abcdeabcde", 0, 1, 0);
+    test(S("abcdeabcde"), "abcdeabcde", 0, 5, 0);
+    test(S("abcdeabcde"), "abcdeabcde", 0, 9, 0);
+    test(S("abcdeabcde"), "abcdeabcde", 0, 10, 0);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 0, 0, 0);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 0, 1, 0);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 0, 10, 0);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 0, 19, S::npos);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 0, 20, S::npos);
+    test(S("abcdeabcde"), "", 1, 0, 1);
+    test(S("abcdeabcde"), "abcde", 1, 0, 1);
+    test(S("abcdeabcde"), "abcde", 1, 1, 0);
+    test(S("abcdeabcde"), "abcde", 1, 2, 0);
+    test(S("abcdeabcde"), "abcde", 1, 4, 0);
+    test(S("abcdeabcde"), "abcde", 1, 5, 0);
+    test(S("abcdeabcde"), "abcdeabcde", 1, 0, 1);
+    test(S("abcdeabcde"), "abcdeabcde", 1, 1, 0);
+    test(S("abcdeabcde"), "abcdeabcde", 1, 5, 0);
+    test(S("abcdeabcde"), "abcdeabcde", 1, 9, 0);
+    test(S("abcdeabcde"), "abcdeabcde", 1, 10, 0);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 1, 0, 1);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 1, 1, 0);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 1, 10, 0);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 1, 19, S::npos);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 1, 20, S::npos);
+    test(S("abcdeabcde"), "", 5, 0, 5);
+    test(S("abcdeabcde"), "abcde", 5, 0, 5);
+    test(S("abcdeabcde"), "abcde", 5, 1, 5);
+    test(S("abcdeabcde"), "abcde", 5, 2, 5);
+    test(S("abcdeabcde"), "abcde", 5, 4, 5);
+    test(S("abcdeabcde"), "abcde", 5, 5, 5);
+    test(S("abcdeabcde"), "abcdeabcde", 5, 0, 5);
+    test(S("abcdeabcde"), "abcdeabcde", 5, 1, 5);
+    test(S("abcdeabcde"), "abcdeabcde", 5, 5, 5);
+    test(S("abcdeabcde"), "abcdeabcde", 5, 9, 0);
+    test(S("abcdeabcde"), "abcdeabcde", 5, 10, 0);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 5, 0, 5);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 5, 1, 5);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 5, 10, 0);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 5, 19, S::npos);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 5, 20, S::npos);
+    test(S("abcdeabcde"), "", 9, 0, 9);
+    test(S("abcdeabcde"), "abcde", 9, 0, 9);
+    test(S("abcdeabcde"), "abcde", 9, 1, 5);
+    test(S("abcdeabcde"), "abcde", 9, 2, 5);
+    test(S("abcdeabcde"), "abcde", 9, 4, 5);
+    test(S("abcdeabcde"), "abcde", 9, 5, 5);
+    test(S("abcdeabcde"), "abcdeabcde", 9, 0, 9);
+    test(S("abcdeabcde"), "abcdeabcde", 9, 1, 5);
+    test(S("abcdeabcde"), "abcdeabcde", 9, 5, 5);
+    test(S("abcdeabcde"), "abcdeabcde", 9, 9, 0);
+    test(S("abcdeabcde"), "abcdeabcde", 9, 10, 0);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 9, 0, 9);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 9, 1, 5);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 9, 10, 0);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 9, 19, S::npos);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 9, 20, S::npos);
+    test(S("abcdeabcde"), "", 10, 0, 10);
+    test(S("abcdeabcde"), "abcde", 10, 0, 10);
+    test(S("abcdeabcde"), "abcde", 10, 1, 5);
+    test(S("abcdeabcde"), "abcde", 10, 2, 5);
+    test(S("abcdeabcde"), "abcde", 10, 4, 5);
+    test(S("abcdeabcde"), "abcde", 10, 5, 5);
+    test(S("abcdeabcde"), "abcdeabcde", 10, 0, 10);
+    test(S("abcdeabcde"), "abcdeabcde", 10, 1, 5);
+}
+
+template <class S>
+void test2()
+{
+    test(S("abcdeabcde"), "abcdeabcde", 10, 5, 5);
+    test(S("abcdeabcde"), "abcdeabcde", 10, 9, 0);
+    test(S("abcdeabcde"), "abcdeabcde", 10, 10, 0);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 10, 0, 10);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 10, 1, 5);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 10, 10, 0);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 10, 19, S::npos);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 10, 20, S::npos);
+    test(S("abcdeabcde"), "", 11, 0, 10);
+    test(S("abcdeabcde"), "abcde", 11, 0, 10);
+    test(S("abcdeabcde"), "abcde", 11, 1, 5);
+    test(S("abcdeabcde"), "abcde", 11, 2, 5);
+    test(S("abcdeabcde"), "abcde", 11, 4, 5);
+    test(S("abcdeabcde"), "abcde", 11, 5, 5);
+    test(S("abcdeabcde"), "abcdeabcde", 11, 0, 10);
+    test(S("abcdeabcde"), "abcdeabcde", 11, 1, 5);
+    test(S("abcdeabcde"), "abcdeabcde", 11, 5, 5);
+    test(S("abcdeabcde"), "abcdeabcde", 11, 9, 0);
+    test(S("abcdeabcde"), "abcdeabcde", 11, 10, 0);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 11, 0, 10);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 11, 1, 5);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 11, 10, 0);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 11, 19, S::npos);
+    test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 11, 20, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), "", 0, 0, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 0, 0, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 0, 1, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 0, 2, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 0, 4, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 0, 5, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 0, 0, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 0, 1, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 0, 5, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 0, 9, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 0, 10, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 0, 0, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 0, 1, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 0, 10, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 0, 19, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 0, 20, 0);
+    test(S("abcdeabcdeabcdeabcde"), "", 1, 0, 1);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 1, 0, 1);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 1, 1, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 1, 2, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 1, 4, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 1, 5, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 1, 0, 1);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 1, 1, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 1, 5, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 1, 9, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 1, 10, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 1, 0, 1);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 1, 1, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 1, 10, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 1, 19, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 1, 20, 0);
+    test(S("abcdeabcdeabcdeabcde"), "", 10, 0, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 10, 0, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 10, 1, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 10, 2, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 10, 4, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 10, 5, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 10, 0, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 10, 1, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 10, 5, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 10, 9, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 10, 10, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 10, 0, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 10, 1, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 10, 10, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 10, 19, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 10, 20, 0);
+    test(S("abcdeabcdeabcdeabcde"), "", 19, 0, 19);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 19, 0, 19);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 19, 1, 15);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 19, 2, 15);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 19, 4, 15);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 19, 5, 15);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 19, 0, 19);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 19, 1, 15);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 19, 5, 15);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 19, 9, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 19, 10, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 19, 0, 19);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 19, 1, 15);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 19, 10, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 19, 19, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 19, 20, 0);
+    test(S("abcdeabcdeabcdeabcde"), "", 20, 0, 20);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 20, 0, 20);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 20, 1, 15);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 20, 2, 15);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 20, 4, 15);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 20, 5, 15);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 20, 0, 20);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 20, 1, 15);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 20, 5, 15);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 20, 9, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 20, 10, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 20, 0, 20);
+}
+
+template <class S>
+void test3()
+{
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 20, 1, 15);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 20, 10, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 20, 19, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 20, 20, 0);
+    test(S("abcdeabcdeabcdeabcde"), "", 21, 0, 20);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 21, 0, 20);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 21, 1, 15);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 21, 2, 15);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 21, 4, 15);
+    test(S("abcdeabcdeabcdeabcde"), "abcde", 21, 5, 15);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 21, 0, 20);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 21, 1, 15);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 21, 5, 15);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 21, 9, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 21, 10, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 21, 0, 20);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 21, 1, 15);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 21, 10, 10);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 21, 19, 0);
+    test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 21, 20, 0);
+}
+
+int main(int, char**)
+{
+    {
+    typedef std::string_view S;
+    test0<S>();
+    test1<S>();
+    test2<S>();
+    test3<S>();
+    }
+
+#if TEST_STD_VER > 11
+    {
+    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
+    constexpr SV  sv1;
+    constexpr SV  sv2 { "abcde", 5 };
+
+    static_assert (sv1.rfind( "",      0, 0 ) == 0, "" );
+    static_assert (sv1.rfind( "abcde", 0, 0 ) == 0, "" );
+    static_assert (sv1.rfind( "abcde", 0, 1 ) == SV::npos, "" );
+    static_assert (sv2.rfind( "",      0, 0 ) == 0, "" );
+    static_assert (sv2.rfind( "abcde", 0, 0 ) == 0, "" );
+    static_assert (sv2.rfind( "abcde", 0, 1 ) == 0, "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.find/rfind_string_view_size.pass.cpp

@@ -0,0 +1,170 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// constexpr size_type rfind(const basic_string& str, size_type pos = npos) const;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+
+template <class S>
+void
+test(const S& s, const S& str, typename S::size_type pos, typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.rfind(str, pos));
+    assert(s.rfind(str, pos) == x);
+    if (x != S::npos)
+        assert(x <= pos && x + str.size() <= s.size());
+}
+
+template <class S>
+void
+test(const S& s, const S& str, typename S::size_type x)
+{
+    LIBCPP_ASSERT_NOEXCEPT(s.rfind(str));
+    assert(s.rfind(str) == x);
+    if (x != S::npos)
+        assert(0 <= x && x + str.size() <= s.size());
+}
+
+template <class S>
+void test0()
+{
+    test(S(""), S(""), 0, 0);
+    test(S(""), S("abcde"), 0, S::npos);
+    test(S(""), S("abcdeabcde"), 0, S::npos);
+    test(S(""), S("abcdeabcdeabcdeabcde"), 0, S::npos);
+    test(S(""), S(""), 1, 0);
+    test(S(""), S("abcde"), 1, S::npos);
+    test(S(""), S("abcdeabcde"), 1, S::npos);
+    test(S(""), S("abcdeabcdeabcdeabcde"), 1, S::npos);
+    test(S("abcde"), S(""), 0, 0);
+    test(S("abcde"), S("abcde"), 0, 0);
+    test(S("abcde"), S("abcdeabcde"), 0, S::npos);
+    test(S("abcde"), S("abcdeabcdeabcdeabcde"), 0, S::npos);
+    test(S("abcde"), S(""), 1, 1);
+    test(S("abcde"), S("abcde"), 1, 0);
+    test(S("abcde"), S("abcdeabcde"), 1, S::npos);
+    test(S("abcde"), S("abcdeabcdeabcdeabcde"), 1, S::npos);
+    test(S("abcde"), S(""), 2, 2);
+    test(S("abcde"), S("abcde"), 2, 0);
+    test(S("abcde"), S("abcdeabcde"), 2, S::npos);
+    test(S("abcde"), S("abcdeabcdeabcdeabcde"), 2, S::npos);
+    test(S("abcde"), S(""), 4, 4);
+    test(S("abcde"), S("abcde"), 4, 0);
+    test(S("abcde"), S("abcdeabcde"), 4, S::npos);
+    test(S("abcde"), S("abcdeabcdeabcdeabcde"), 4, S::npos);
+    test(S("abcde"), S(""), 5, 5);
+    test(S("abcde"), S("abcde"), 5, 0);
+    test(S("abcde"), S("abcdeabcde"), 5, S::npos);
+    test(S("abcde"), S("abcdeabcdeabcdeabcde"), 5, S::npos);
+    test(S("abcde"), S(""), 6, 5);
+    test(S("abcde"), S("abcde"), 6, 0);
+    test(S("abcde"), S("abcdeabcde"), 6, S::npos);
+    test(S("abcde"), S("abcdeabcdeabcdeabcde"), 6, S::npos);
+    test(S("abcdeabcde"), S(""), 0, 0);
+    test(S("abcdeabcde"), S("abcde"), 0, 0);
+    test(S("abcdeabcde"), S("abcdeabcde"), 0, 0);
+    test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), 0, S::npos);
+    test(S("abcdeabcde"), S(""), 1, 1);
+    test(S("abcdeabcde"), S("abcde"), 1, 0);
+    test(S("abcdeabcde"), S("abcdeabcde"), 1, 0);
+    test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), 1, S::npos);
+    test(S("abcdeabcde"), S(""), 5, 5);
+    test(S("abcdeabcde"), S("abcde"), 5, 5);
+    test(S("abcdeabcde"), S("abcdeabcde"), 5, 0);
+    test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), 5, S::npos);
+    test(S("abcdeabcde"), S(""), 9, 9);
+    test(S("abcdeabcde"), S("abcde"), 9, 5);
+    test(S("abcdeabcde"), S("abcdeabcde"), 9, 0);
+    test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), 9, S::npos);
+    test(S("abcdeabcde"), S(""), 10, 10);
+    test(S("abcdeabcde"), S("abcde"), 10, 5);
+    test(S("abcdeabcde"), S("abcdeabcde"), 10, 0);
+    test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), 10, S::npos);
+    test(S("abcdeabcde"), S(""), 11, 10);
+    test(S("abcdeabcde"), S("abcde"), 11, 5);
+    test(S("abcdeabcde"), S("abcdeabcde"), 11, 0);
+    test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), 11, S::npos);
+    test(S("abcdeabcdeabcdeabcde"), S(""), 0, 0);
+    test(S("abcdeabcdeabcdeabcde"), S("abcde"), 0, 0);
+    test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 0, 0);
+    test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 0, 0);
+    test(S("abcdeabcdeabcdeabcde"), S(""), 1, 1);
+    test(S("abcdeabcdeabcdeabcde"), S("abcde"), 1, 0);
+    test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 1, 0);
+    test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 1, 0);
+    test(S("abcdeabcdeabcdeabcde"), S(""), 10, 10);
+    test(S("abcdeabcdeabcdeabcde"), S("abcde"), 10, 10);
+    test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 10, 10);
+    test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 10, 0);
+    test(S("abcdeabcdeabcdeabcde"), S(""), 19, 19);
+    test(S("abcdeabcdeabcdeabcde"), S("abcde"), 19, 15);
+    test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 19, 10);
+    test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 19, 0);
+    test(S("abcdeabcdeabcdeabcde"), S(""), 20, 20);
+    test(S("abcdeabcdeabcdeabcde"), S("abcde"), 20, 15);
+    test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 20, 10);
+    test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 20, 0);
+    test(S("abcdeabcdeabcdeabcde"), S(""), 21, 20);
+    test(S("abcdeabcdeabcdeabcde"), S("abcde"), 21, 15);
+    test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 21, 10);
+    test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 21, 0);
+}
+
+template <class S>
+void test1()
+{
+    test(S(""), S(""), 0);
+    test(S(""), S("abcde"), S::npos);
+    test(S(""), S("abcdeabcde"), S::npos);
+    test(S(""), S("abcdeabcdeabcdeabcde"), S::npos);
+    test(S("abcde"), S(""), 5);
+    test(S("abcde"), S("abcde"), 0);
+    test(S("abcde"), S("abcdeabcde"), S::npos);
+    test(S("abcde"), S("abcdeabcdeabcdeabcde"), S::npos);
+    test(S("abcdeabcde"), S(""), 10);
+    test(S("abcdeabcde"), S("abcde"), 5);
+    test(S("abcdeabcde"), S("abcdeabcde"), 0);
+    test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), S::npos);
+    test(S("abcdeabcdeabcdeabcde"), S(""), 20);
+    test(S("abcdeabcdeabcdeabcde"), S("abcde"), 15);
+    test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 10);
+    test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 0);
+}
+
+int main(int, char**)
+{
+    {
+    typedef std::string_view S;
+    test0<S>();
+    test1<S>();
+    }
+
+#if TEST_STD_VER > 11
+    {
+    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
+    constexpr SV  sv1;
+    constexpr SV  sv2 { "abcde", 5 };
+
+    static_assert (sv1.rfind(sv1) == 0, "" );
+    static_assert (sv1.rfind(sv2) == SV::npos, "" );
+    static_assert (sv2.rfind(sv1) == 5, "" );
+    static_assert (sv2.rfind(sv2) == 0, "" );
+    static_assert (sv2.rfind(sv2, 1) == 0, "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.hash/char_type.hash.fail.cpp

@@ -0,0 +1,77 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03
+// UNSUPPORTED: !stdlib=libc++ && (c++11 || c++14)
+
+// <string_view>
+
+// Test that hash specializations for <string_view> require "char_traits<_CharT>" not just any "_Trait".
+
+#include <string_view>
+#include <string> // for 'mbstate_t'
+
+#include "test_macros.h"
+
+template <class _CharT>
+struct trait // copied from <__string>
+{
+    typedef _CharT         char_type;
+    typedef int            int_type;
+    typedef std::streamoff off_type;
+    typedef std::streampos pos_type;
+    typedef std::mbstate_t state_type;
+
+    static inline void assign(char_type& __c1, const char_type& __c2) {
+        __c1 = __c2;
+    }
+    static inline bool eq(char_type __c1, char_type __c2) { return __c1 == __c2; }
+    static inline bool lt(char_type __c1, char_type __c2) { return __c1 < __c2; }
+
+    static int compare(const char_type* __s1, const char_type* __s2, size_t __n);
+    static size_t length(const char_type* __s);
+    static const char_type* find(const char_type* __s, size_t __n,
+                                 const char_type& __a);
+
+    static char_type* move(char_type* __s1, const char_type* __s2, size_t __n);
+    static char_type* copy(char_type* __s1, const char_type* __s2, size_t __n);
+    static char_type* assign(char_type* __s, size_t __n, char_type __a);
+
+    static inline int_type not_eof(int_type __c) {
+        return eq_int_type(__c, eof()) ? ~eof() : __c;
+    }
+    static inline char_type to_char_type(int_type __c) { return char_type(__c); }
+    static inline int_type to_int_type(char_type __c) { return int_type(__c); }
+    static inline bool eq_int_type(int_type __c1, int_type __c2) {
+        return __c1 == __c2;
+    }
+    static inline int_type eof() { return int_type(EOF); }
+};
+
+template <class CharT>
+void test() {
+    typedef std::basic_string_view<CharT, trait<CharT> > strv_t;
+    std::hash<strv_t>
+        h; // expected-error-re 4 {{{{call to implicitly-deleted default constructor of 'std::hash<strv_t>'|implicit instantiation of undefined template}} {{.+}}}}}}
+#if TEST_STD_VER > 17 && defined(__cpp_char8_t)
+    // expected-error-re@-2 {{{{call to implicitly-deleted default constructor of 'std::hash<strv_t>'|implicit instantiation of undefined template}} {{.+}}}}}}
+#endif
+    (void)h;
+}
+
+int main(int, char**) {
+    test<char>();
+    test<wchar_t>();
+#if TEST_STD_VER > 17 && defined(__cpp_char8_t)
+    test<char8_t>();
+#endif
+    test<char16_t>();
+    test<char32_t>();
+
+    return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.hash/enabled_hashes.pass.cpp

@@ -0,0 +1,38 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03
+// UNSUPPORTED: !stdlib=libc++ && (c++11 || c++14)
+
+// <string_view>
+
+// Test that <string_view> provides all of the arithmetic, enum, and pointer
+// hash specializations.
+
+#include <string_view>
+
+#include "poisoned_hash_helper.h"
+
+#include "test_macros.h"
+
+int main(int, char**) {
+  test_library_hash_specializations_available();
+  {
+    test_hash_enabled_for_type<std::string_view>();
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    test_hash_enabled_for_type<std::wstring_view>();
+#endif
+#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
+    test_hash_enabled_for_type<std::u8string_view>();
+#endif
+    test_hash_enabled_for_type<std::u16string_view>();
+    test_hash_enabled_for_type<std::u32string_view>();
+  }
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.hash/string_view.pass.cpp

@@ -0,0 +1,74 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <functional>
+
+// template <class T>
+// struct hash
+// {
+//     size_t operator()(T val) const;
+// };
+
+// Not very portable
+
+#include <string_view>
+#include <string>
+#include <cassert>
+#include <type_traits>
+
+#include "test_macros.h"
+
+using std::string_view;
+
+template <class SV>
+void
+test()
+{
+    typedef std::hash<SV> H;
+#if TEST_STD_VER <= 14
+    static_assert((std::is_same<typename H::argument_type, SV>::value), "" );
+    static_assert((std::is_same<typename H::result_type, std::size_t>::value), "" );
+#endif
+
+    typedef typename SV::value_type char_type;
+    typedef std::basic_string<char_type> String;
+    typedef std::hash<String> SH;
+    ASSERT_NOEXCEPT(H()(SV()));
+
+    char_type g1 [ 10 ];
+    char_type g2 [ 10 ];
+    for ( int i = 0; i < 10; ++i )
+        g1[i] = g2[9-i] = static_cast<char_type>('0' + i);
+    H h;
+    SH sh;
+    SV s1(g1, 10);
+    String ss1(s1);
+    SV s2(g2, 10);
+    String ss2(s2);
+    assert(h(s1) == h(s1));
+    assert(h(s1) != h(s2));
+    assert(sh(ss1) == h(s1));
+    assert(sh(ss2) == h(s2));
+}
+
+int main(int, char**)
+{
+    test<std::string_view>();
+#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
+    test<std::u8string_view>();
+#endif
+    test<std::u16string_view>();
+    test<std::u32string_view>();
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    test<std::wstring_view>();
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.io/stream_insert.pass.cpp

@@ -0,0 +1,63 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: no-localization
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// template<class charT, class traits, class Allocator>
+//   basic_ostream<charT, traits>&
+//   operator<<(basic_ostream<charT, traits>& os,
+//              const basic_string_view<charT,traits> str);
+
+#include <string_view>
+#include <sstream>
+#include <cassert>
+
+#include "test_macros.h"
+
+int main(int, char**)
+{
+    {
+        std::ostringstream out;
+        std::string_view sv("some text");
+        out << sv;
+        assert(out.good());
+        assert(sv == out.str());
+    }
+    {
+        std::ostringstream out;
+        std::string s("some text");
+        std::string_view sv(s);
+        out.width(12);
+        out << sv;
+        assert(out.good());
+        assert("   " + s == out.str());
+    }
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    {
+        std::wostringstream out;
+        std::wstring_view sv(L"some text");
+        out << sv;
+        assert(out.good());
+        assert(sv == out.str());
+    }
+    {
+        std::wostringstream out;
+        std::wstring s(L"some text");
+        std::wstring_view sv(s);
+        out.width(12);
+        out << sv;
+        assert(out.good());
+        assert(L"   " + s == out.str());
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.io/stream_insert_decl_present.compile.pass.cpp

@@ -0,0 +1,26 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// template<class charT, class traits, class Allocator>
+//   basic_ostream<charT, traits>&
+//   operator<<(basic_ostream<charT, traits>& os,
+//              const basic_string_view<charT,traits> str);
+
+#include <string_view>
+#include <iosfwd>
+
+template <class SV, class = void>
+struct HasDecl : std::false_type {};
+template <class SV>
+struct HasDecl<SV, decltype(static_cast<void>(std::declval<std::ostream&>() << std::declval<SV&>()))> : std::true_type {};
+
+static_assert(HasDecl<std::string_view>::value, "streaming operator declaration not present");

module/jni/libcxx/test/std/strings/string.view/string.view.iterators/begin.pass.cpp

@@ -0,0 +1,105 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// constexpr const_iterator begin() const;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+
+template <class S>
+void
+test(S s)
+{
+    const S& cs = s;
+    typename S::iterator b = s.begin();
+    typename S::const_iterator cb1 = cs.begin();
+    typename S::const_iterator cb2 = s.cbegin();
+    if (!s.empty())
+    {
+        assert(   *b ==  s[0]);
+        assert(  &*b == &s[0]);
+        assert( *cb1 ==  s[0]);
+        assert(&*cb1 == &s[0]);
+        assert( *cb2 ==  s[0]);
+        assert(&*cb2 == &s[0]);
+
+    }
+    assert(  b == cb1);
+    assert(  b == cb2);
+    assert(cb1 == cb2);
+}
+
+
+int main(int, char**)
+{
+    typedef std::string_view    string_view;
+#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
+    typedef std::u8string_view  u8string_view;
+#endif
+    typedef std::u16string_view u16string_view;
+    typedef std::u32string_view u32string_view;
+
+    test(string_view   ());
+    test(u16string_view());
+    test(u32string_view());
+    test(string_view   ( "123"));
+#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
+    test(u8string_view{u8"123"});
+#endif
+#if TEST_STD_VER >= 11
+    test(u16string_view{u"123"});
+    test(u32string_view{U"123"});
+#endif
+
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    typedef std::wstring_view   wstring_view;
+    test(wstring_view  ());
+    test(wstring_view  (L"123"));
+#endif
+
+#if TEST_STD_VER > 11
+    {
+    constexpr string_view       sv { "123", 3 };
+#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
+    constexpr u8string_view u8sv  {u8"123", 3 };
+#endif
+    constexpr u16string_view u16sv {u"123", 3 };
+    constexpr u32string_view u32sv {U"123", 3 };
+
+    static_assert (    *sv.begin() ==    sv[0], "" );
+#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
+    static_assert (  *u8sv.begin() ==  u8sv[0], "" );
+#endif
+    static_assert ( *u16sv.begin() == u16sv[0], "" );
+    static_assert ( *u32sv.begin() == u32sv[0], "" );
+
+    static_assert (    *sv.cbegin() ==    sv[0], "" );
+#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
+    static_assert (  *u8sv.cbegin() ==  u8sv[0], "" );
+#endif
+    static_assert ( *u16sv.cbegin() == u16sv[0], "" );
+    static_assert ( *u32sv.cbegin() == u32sv[0], "" );
+
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+        {
+            constexpr wstring_view     wsv {L"123", 3 };
+            static_assert (   *wsv.begin() ==   wsv[0], "" );
+            static_assert (   *wsv.cbegin() ==   wsv[0], "" );
+        }
+#endif
+    }
+#endif // TEST_STD_VER > 11
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.iterators/end.pass.cpp

@@ -0,0 +1,114 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// constexpr const_iterator end() const;
+
+#include <string_view>
+#include <cassert>
+#include <cstddef>
+
+#include "test_macros.h"
+
+template <class S>
+void
+test(S s)
+{
+    const S& cs = s;
+    typename S::iterator e = s.end();
+    typename S::const_iterator ce1 = cs.end();
+    typename S::const_iterator ce2 = s.cend();
+
+    if (s.empty())
+    {
+        assert(  e ==  s.begin());
+        assert(ce1 == cs.begin());
+        assert(ce2 ==  s.begin());
+    }
+    else
+    {
+        assert(  e !=  s.begin());
+        assert(ce1 != cs.begin());
+        assert(ce2 !=  s.begin());
+    }
+
+    assert(static_cast<std::size_t>(  e -  s.begin()) == s.size());
+    assert(static_cast<std::size_t>(ce1 - cs.begin()) == cs.size());
+    assert(static_cast<std::size_t>(ce2 - s.cbegin()) == s.size());
+
+    assert(  e == ce1);
+    assert(  e == ce2);
+    assert(ce1 == ce2);
+}
+
+
+int main(int, char**)
+{
+    typedef std::string_view    string_view;
+#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
+    typedef std::u8string_view  u8string_view;
+#endif
+    typedef std::u16string_view u16string_view;
+    typedef std::u32string_view u32string_view;
+
+    test(string_view   ());
+    test(u16string_view());
+    test(u32string_view());
+    test(string_view   ( "123"));
+#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
+    test(u8string_view{u8"123"});
+#endif
+#if TEST_STD_VER >= 11
+    test(u16string_view{u"123"});
+    test(u32string_view{U"123"});
+#endif
+
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    typedef std::wstring_view   wstring_view;
+    test(wstring_view  ());
+    test(wstring_view  (L"123"));
+#endif
+
+#if TEST_STD_VER > 11
+    {
+    constexpr string_view       sv { "123", 3 };
+#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
+    constexpr u8string_view u8sv  {u8"123", 3 };
+#endif
+    constexpr u16string_view u16sv {u"123", 3 };
+    constexpr u32string_view u32sv {U"123", 3 };
+
+    static_assert (    sv.begin() !=    sv.end(), "" );
+#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
+    static_assert (  u8sv.begin() !=  u8sv.end(), "" );
+#endif
+    static_assert ( u16sv.begin() != u16sv.end(), "" );
+    static_assert ( u32sv.begin() != u32sv.end(), "" );
+
+    static_assert (    sv.begin() !=    sv.cend(), "" );
+#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
+    static_assert (  u8sv.begin() !=  u8sv.cend(), "" );
+#endif
+    static_assert ( u16sv.begin() != u16sv.cend(), "" );
+    static_assert ( u32sv.begin() != u32sv.cend(), "" );
+
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+        {
+            constexpr wstring_view     wsv {L"123", 3 };
+            static_assert (   wsv.begin() !=   wsv.end(), "" );
+            static_assert (   wsv.begin() !=   wsv.cend(), "" );
+        }
+#endif
+    }
+#endif // TEST_STD_VER > 11
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.iterators/iterator_concept_conformance.compile.pass.cpp

@@ -0,0 +1,52 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+
+// iterator, const_iterator, reverse_iterator, const_reverse_iterator
+
+#include <string_view>
+
+#include <iterator>
+
+#include "test_macros.h"
+
+using iterator = std::string_view::iterator;
+using const_iterator = std::string_view::const_iterator;
+using reverse_iterator = std::string_view::reverse_iterator;
+using const_reverse_iterator = std::string_view::const_reverse_iterator;
+
+static_assert(std::contiguous_iterator<iterator>);
+LIBCPP_STATIC_ASSERT(std::__is_cpp17_random_access_iterator<iterator>::value);
+static_assert(!std::indirectly_writable<iterator, char>);
+static_assert(std::sentinel_for<iterator, iterator>);
+static_assert(std::sentinel_for<iterator, const_iterator>);
+static_assert(!std::sentinel_for<iterator, reverse_iterator>);
+static_assert(!std::sentinel_for<iterator, const_reverse_iterator>);
+static_assert(std::sized_sentinel_for<iterator, iterator>);
+static_assert(std::sized_sentinel_for<iterator, const_iterator>);
+static_assert(!std::sized_sentinel_for<iterator, reverse_iterator>);
+static_assert(!std::sized_sentinel_for<iterator, const_reverse_iterator>);
+static_assert(std::indirectly_movable<iterator, char*>);
+static_assert(std::indirectly_movable_storable<iterator, char*>);
+static_assert(std::indirectly_copyable<iterator, char*>);
+static_assert(std::indirectly_copyable_storable<iterator, char*>);
+static_assert(!std::indirectly_swappable<iterator, iterator>);
+
+static_assert(std::contiguous_iterator<const_iterator>);
+LIBCPP_STATIC_ASSERT(std::__is_cpp17_random_access_iterator<const_iterator>::value);
+static_assert(!std::indirectly_writable<const_iterator, char>);
+static_assert(std::sentinel_for<const_iterator, iterator>);
+static_assert(std::sentinel_for<const_iterator, const_iterator>);
+static_assert(!std::sentinel_for<const_iterator, reverse_iterator>);
+static_assert(!std::sentinel_for<const_iterator, const_reverse_iterator>);
+static_assert(std::sized_sentinel_for<const_iterator, iterator>);
+static_assert(std::sized_sentinel_for<const_iterator, const_iterator>);
+static_assert(!std::sized_sentinel_for<const_iterator, reverse_iterator>);
+static_assert(!std::sized_sentinel_for<const_iterator, const_reverse_iterator>);
+static_assert(!std::indirectly_swappable<const_iterator, const_iterator>);

module/jni/libcxx/test/std/strings/string.view/string.view.iterators/rbegin.pass.cpp

@@ -0,0 +1,106 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// const_iterator rbegin() const;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+
+template <class S>
+void
+test(S s)
+{
+    const S& cs = s;
+    typename S::reverse_iterator b = s.rbegin();
+    typename S::const_reverse_iterator cb1 = cs.rbegin();
+    typename S::const_reverse_iterator cb2 = s.crbegin();
+    if (!s.empty())
+    {
+        const size_t last = s.size() - 1;
+        assert(   *b ==  s[last]);
+        assert(  &*b == &s[last]);
+        assert( *cb1 ==  s[last]);
+        assert(&*cb1 == &s[last]);
+        assert( *cb2 ==  s[last]);
+        assert(&*cb2 == &s[last]);
+
+    }
+    assert(  b == cb1);
+    assert(  b == cb2);
+    assert(cb1 == cb2);
+}
+
+
+int main(int, char**)
+{
+    typedef std::string_view    string_view;
+#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
+    typedef std::u8string_view  u8string_view;
+#endif
+    typedef std::u16string_view u16string_view;
+    typedef std::u32string_view u32string_view;
+
+    test(string_view   ());
+    test(u16string_view());
+    test(u32string_view());
+    test(string_view   ( "123"));
+#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
+    test(u8string_view{u8"123"});
+#endif
+#if TEST_STD_VER >= 11
+    test(u16string_view{u"123"});
+    test(u32string_view{U"123"});
+#endif
+
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    typedef std::wstring_view   wstring_view;
+    test(wstring_view  ());
+    test(wstring_view  (L"123"));
+#endif
+
+#if TEST_STD_VER > 14
+    {
+    constexpr string_view       sv { "123", 3 };
+#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
+    constexpr u8string_view u8sv  {u8"123", 3 };
+#endif
+    constexpr u16string_view u16sv {u"123", 3 };
+    constexpr u32string_view u32sv {U"123", 3 };
+
+    static_assert (    *sv.rbegin() ==    sv[2], "" );
+#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
+    static_assert (  *u8sv.rbegin() ==  u8sv[2], "" );
+#endif
+    static_assert ( *u16sv.rbegin() == u16sv[2], "" );
+    static_assert ( *u32sv.rbegin() == u32sv[2], "" );
+
+    static_assert (    *sv.crbegin() ==    sv[2], "" );
+#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
+    static_assert (  *u8sv.crbegin() == u8sv[2], "" );
+#endif
+    static_assert ( *u16sv.crbegin() == u16sv[2], "" );
+    static_assert ( *u32sv.crbegin() == u32sv[2], "" );
+
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+        {
+            constexpr wstring_view     wsv {L"123", 3 };
+            static_assert (   *wsv.rbegin() ==   wsv[2], "" );
+            static_assert (   *wsv.crbegin() ==   wsv[2], "" );
+        }
+#endif
+    }
+#endif // TEST_STD_VER > 14
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.iterators/rend.pass.cpp

@@ -0,0 +1,114 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// constexpr const_iterator rend() const;
+
+#include <string_view>
+#include <cassert>
+#include <cstddef>
+
+#include "test_macros.h"
+
+template <class S>
+void
+test(S s)
+{
+    const S& cs = s;
+    typename S::reverse_iterator e = s.rend();
+    typename S::const_reverse_iterator ce1 = cs.rend();
+    typename S::const_reverse_iterator ce2 = s.crend();
+
+    if (s.empty())
+    {
+        assert(  e ==  s.rbegin());
+        assert(ce1 == cs.rbegin());
+        assert(ce2 ==  s.rbegin());
+    }
+    else
+    {
+        assert(  e !=  s.rbegin());
+        assert(ce1 != cs.rbegin());
+        assert(ce2 !=  s.rbegin());
+    }
+
+    assert(static_cast<std::size_t>(  e -  s.rbegin()) == s.size());
+    assert(static_cast<std::size_t>(ce1 - cs.rbegin()) == cs.size());
+    assert(static_cast<std::size_t>(ce2 - s.crbegin()) == s.size());
+
+    assert(  e == ce1);
+    assert(  e == ce2);
+    assert(ce1 == ce2);
+}
+
+
+int main(int, char**)
+{
+    typedef std::string_view    string_view;
+#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
+    typedef std::u8string_view u8string_view;
+#endif
+    typedef std::u16string_view u16string_view;
+    typedef std::u32string_view u32string_view;
+
+    test(string_view   ());
+    test(u16string_view());
+    test(u32string_view());
+    test(string_view   ( "123"));
+#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
+    test(u8string_view{u8"123"});
+#endif
+#if TEST_STD_VER >= 11
+    test(u16string_view{u"123"});
+    test(u32string_view{U"123"});
+#endif
+
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    typedef std::wstring_view   wstring_view;
+    test(wstring_view  ());
+    test(wstring_view  (L"123"));
+#endif
+
+#if TEST_STD_VER > 14
+    {
+    constexpr string_view       sv { "123", 3 };
+#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
+    constexpr u8string_view u8sv {u8"123", 3 };
+#endif
+    constexpr u16string_view u16sv {u"123", 3 };
+    constexpr u32string_view u32sv {U"123", 3 };
+
+    static_assert (    *--sv.rend() ==    sv[0], "" );
+#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
+    static_assert (  *--u8sv.rend() ==  u8sv[0], "" );
+#endif
+    static_assert ( *--u16sv.rend() == u16sv[0], "" );
+    static_assert ( *--u32sv.rend() == u32sv[0], "" );
+
+    static_assert (    *--sv.crend() ==    sv[0], "" );
+#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
+    static_assert (  *--u8sv.crend() ==  u8sv[0], "" );
+#endif
+    static_assert ( *--u16sv.crend() == u16sv[0], "" );
+    static_assert ( *--u32sv.crend() == u32sv[0], "" );
+
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+        {
+            constexpr wstring_view     wsv {L"123", 3 };
+            static_assert (   *--wsv.rend() ==   wsv[0], "" );
+            static_assert (   *--wsv.crend() ==   wsv[0], "" );
+        }
+#endif
+    }
+#endif // TEST_STD_VER > 14
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.modifiers/remove_prefix.pass.cpp

@@ -0,0 +1,81 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// void remove_prefix(size_type _n)
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+
+template<typename CharT>
+void test ( const CharT *s, size_t len ) {
+    typedef std::basic_string_view<CharT> SV;
+    {
+    SV sv1 ( s );
+    assert ( sv1.size() == len );
+    assert ( sv1.data() == s );
+
+    if ( len > 0 ) {
+        sv1.remove_prefix ( 1 );
+        assert ( sv1.size() == (len - 1));
+        assert ( sv1.data() == (s + 1));
+        sv1.remove_prefix ( len - 1 );
+    }
+
+    assert ( sv1.size() == 0 );
+    sv1.remove_prefix ( 0 );
+    assert ( sv1.size() == 0 );
+    }
+}
+
+#if TEST_STD_VER > 11
+constexpr size_t test_ce ( size_t n, size_t k ) {
+    typedef std::basic_string_view<char> SV;
+    SV sv1{ "ABCDEFGHIJKL", n };
+    sv1.remove_prefix ( k );
+    return sv1.size();
+}
+#endif
+
+int main(int, char**) {
+    test ( "ABCDE", 5 );
+    test ( "a", 1 );
+    test ( "", 0 );
+
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    test ( L"ABCDE", 5 );
+    test ( L"a", 1 );
+    test ( L"", 0 );
+#endif
+
+#if TEST_STD_VER >= 11
+    test ( u"ABCDE", 5 );
+    test ( u"a", 1 );
+    test ( u"", 0 );
+
+    test ( U"ABCDE", 5 );
+    test ( U"a", 1 );
+    test ( U"", 0 );
+#endif
+
+#if TEST_STD_VER > 11
+    {
+    static_assert ( test_ce ( 5, 0 ) == 5, "" );
+    static_assert ( test_ce ( 5, 1 ) == 4, "" );
+    static_assert ( test_ce ( 5, 5 ) == 0, "" );
+    static_assert ( test_ce ( 9, 3 ) == 6, "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.modifiers/remove_suffix.pass.cpp

@@ -0,0 +1,82 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// void remove_suffix(size_type _n)
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+
+template<typename CharT>
+void test ( const CharT *s, size_t len ) {
+    typedef std::basic_string_view<CharT> SV;
+    {
+    SV sv1 ( s );
+    assert ( sv1.size() == len );
+    assert ( sv1.data() == s );
+
+    if ( len > 0 ) {
+        sv1.remove_suffix ( 1 );
+        assert ( sv1.size() == (len - 1));
+        assert ( sv1.data() == s);
+        sv1.remove_suffix ( len - 1 );
+        }
+
+    assert ( sv1.size() == 0 );
+    sv1.remove_suffix ( 0 );
+    assert ( sv1.size() == 0 );
+    }
+
+}
+
+#if TEST_STD_VER > 11
+constexpr size_t test_ce ( size_t n, size_t k ) {
+    typedef std::basic_string_view<char> SV;
+    SV sv1{ "ABCDEFGHIJKL", n };
+    sv1.remove_suffix ( k );
+    return sv1.size();
+}
+#endif
+
+int main(int, char**) {
+    test ( "ABCDE", 5 );
+    test ( "a", 1 );
+    test ( "", 0 );
+
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    test ( L"ABCDE", 5 );
+    test ( L"a", 1 );
+    test ( L"", 0 );
+#endif
+
+#if TEST_STD_VER >= 11
+    test ( u"ABCDE", 5 );
+    test ( u"a", 1 );
+    test ( u"", 0 );
+
+    test ( U"ABCDE", 5 );
+    test ( U"a", 1 );
+    test ( U"", 0 );
+#endif
+
+#if TEST_STD_VER > 11
+    {
+    static_assert ( test_ce ( 5, 0 ) == 5, "" );
+    static_assert ( test_ce ( 5, 1 ) == 4, "" );
+    static_assert ( test_ce ( 5, 5 ) == 0, "" );
+    static_assert ( test_ce ( 9, 3 ) == 6, "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.modifiers/swap.pass.cpp

@@ -0,0 +1,80 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// void swap(basic_string_view& _other) noexcept
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+
+template<typename CharT>
+void test ( const CharT *s, size_t len ) {
+    typedef std::basic_string_view<CharT> SV;
+    {
+    SV sv1(s);
+    SV sv2;
+
+    assert ( sv1.size() == len );
+    assert ( sv1.data() == s );
+    assert ( sv2.size() == 0 );
+
+    sv1.swap ( sv2 );
+    assert ( sv1.size() == 0 );
+    assert ( sv2.size() == len );
+    assert ( sv2.data() == s );
+    }
+
+}
+
+#if TEST_STD_VER > 11
+constexpr size_t test_ce ( size_t n, size_t k ) {
+    typedef std::basic_string_view<char> SV;
+    SV sv1{ "ABCDEFGHIJKL", n };
+    SV sv2 { sv1.data(), k };
+    sv1.swap ( sv2 );
+    return sv1.size();
+}
+#endif
+
+
+int main(int, char**) {
+    test ( "ABCDE", 5 );
+    test ( "a", 1 );
+    test ( "", 0 );
+
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    test ( L"ABCDE", 5 );
+    test ( L"a", 1 );
+    test ( L"", 0 );
+#endif
+
+#if TEST_STD_VER >= 11
+    test ( u"ABCDE", 5 );
+    test ( u"a", 1 );
+    test ( u"", 0 );
+
+    test ( U"ABCDE", 5 );
+    test ( U"a", 1 );
+    test ( U"", 0 );
+#endif
+
+#if TEST_STD_VER > 11
+    {
+    static_assert ( test_ce (2, 3) == 3, "" );
+    static_assert ( test_ce (5, 3) == 3, "" );
+    static_assert ( test_ce (0, 1) == 1, "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.nonmem/quoted.pass.cpp

@@ -0,0 +1,225 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11
+// UNSUPPORTED: no-localization
+// UNSUPPORTED: !stdlib=libc++ && c++14
+
+// <iomanip>
+
+// quoted
+
+#include <iomanip>
+#include <sstream>
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+
+bool is_skipws ( const std::istream *is ) {
+    return ( is->flags() & std::ios_base::skipws ) != 0;
+}
+
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+bool is_skipws ( const std::wistream *is ) {
+    return ( is->flags() & std::ios_base::skipws ) != 0;
+}
+#endif
+
+void round_trip ( const char *p ) {
+    std::stringstream ss;
+    bool skippingws = is_skipws ( &ss );
+    std::string_view sv {p};
+
+    ss << std::quoted(sv);
+    std::string s;
+    ss >> std::quoted(s);
+    assert ( s == sv );
+    assert ( skippingws == is_skipws ( &ss ));
+    }
+
+void round_trip_ws ( const char *p ) {
+    std::stringstream ss;
+    std::noskipws ( ss );
+    bool skippingws = is_skipws ( &ss );
+    std::string_view sv {p};
+
+    ss << std::quoted(sv);
+    std::string s;
+    ss >> std::quoted(s);
+    assert ( s == sv );
+    assert ( skippingws == is_skipws ( &ss ));
+    }
+
+void round_trip_d ( const char *p, char delim ) {
+    std::stringstream ss;
+    std::string_view sv {p};
+
+    ss << std::quoted(sv, delim);
+    std::string s;
+    ss >> std::quoted(s, delim);
+    assert ( s == sv );
+    }
+
+void round_trip_e ( const char *p, char escape ) {
+    std::stringstream ss;
+    std::string_view sv {p};
+
+    ss << std::quoted(sv, '"', escape );
+    std::string s;
+    ss >> std::quoted(s, '"', escape );
+    assert ( s == sv );
+    }
+
+
+
+std::string quote ( const char *p, char delim='"', char escape='\\' ) {
+    std::stringstream ss;
+    ss << std::quoted(p, delim, escape);
+    std::string s;
+    ss >> s;    // no quote
+    return s;
+}
+
+std::string unquote ( const char *p, char delim='"', char escape='\\' ) {
+    std::stringstream ss;
+    ss << p;
+    std::string s;
+    ss >> std::quoted(s, delim, escape);
+    return s;
+}
+
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+void round_trip ( const wchar_t *p ) {
+    std::wstringstream ss;
+    bool skippingws = is_skipws ( &ss );
+    std::wstring_view sv {p};
+
+    ss << std::quoted(sv);
+    std::wstring s;
+    ss >> std::quoted(s);
+    assert ( s == sv );
+    assert ( skippingws == is_skipws ( &ss ));
+    }
+
+
+void round_trip_ws ( const wchar_t *p ) {
+    std::wstringstream ss;
+    std::noskipws ( ss );
+    bool skippingws = is_skipws ( &ss );
+    std::wstring_view sv {p};
+
+    ss << std::quoted(sv);
+    std::wstring s;
+    ss >> std::quoted(s);
+    assert ( s == sv );
+    assert ( skippingws == is_skipws ( &ss ));
+    }
+
+void round_trip_d ( const wchar_t *p, wchar_t delim ) {
+    std::wstringstream ss;
+    std::wstring_view sv {p};
+
+    ss << std::quoted(sv, delim);
+    std::wstring s;
+    ss >> std::quoted(s, delim);
+    assert ( s == sv );
+    }
+
+void round_trip_e ( const wchar_t *p, wchar_t escape ) {
+    std::wstringstream ss;
+    std::wstring_view sv {p};
+
+    ss << std::quoted(sv, wchar_t('"'), escape );
+    std::wstring s;
+    ss >> std::quoted(s, wchar_t('"'), escape );
+    assert ( s == sv );
+    }
+
+
+std::wstring quote ( const wchar_t *p, wchar_t delim='"', wchar_t escape='\\' ) {
+    std::wstringstream ss;
+    std::wstring_view sv {p};
+
+    ss << std::quoted(sv, delim, escape);
+    std::wstring s;
+    ss >> s;    // no quote
+    return s;
+}
+
+std::wstring unquote ( const wchar_t *p, wchar_t delim='"', wchar_t escape='\\' ) {
+    std::wstringstream ss;
+    std::wstring_view sv {p};
+
+    ss << sv;
+    std::wstring s;
+    ss >> std::quoted(s, delim, escape);
+    return s;
+}
+#endif // TEST_HAS_NO_WIDE_CHARACTERS
+
+int main(int, char**)
+{
+    round_trip    (  "" );
+    round_trip_ws (  "" );
+    round_trip_d  (  "", 'q' );
+    round_trip_e  (  "", 'q' );
+
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    round_trip    ( L"" );
+    round_trip_ws ( L"" );
+    round_trip_d  ( L"", 'q' );
+    round_trip_e  ( L"", 'q' );
+#endif
+
+    round_trip    (  "Hi" );
+    round_trip_ws (  "Hi" );
+    round_trip_d  (  "Hi", '!' );
+    round_trip_e  (  "Hi", '!' );
+    assert ( quote ( "Hi", '!' ) == "!Hi!" );
+    assert ( quote ( "Hi!", '!' ) == R"(!Hi\!!)" );
+
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    round_trip    ( L"Hi" );
+    round_trip_ws ( L"Hi" );
+    round_trip_d  ( L"Hi", '!' );
+    round_trip_e  ( L"Hi", '!' );
+    assert ( quote ( L"Hi", '!' )  == L"!Hi!" );
+    assert ( quote ( L"Hi!", '!' ) == LR"(!Hi\!!)" );
+#endif
+
+    round_trip    (  "Hi Mom" );
+    round_trip_ws (  "Hi Mom" );
+
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    round_trip    ( L"Hi Mom" );
+    round_trip_ws ( L"Hi Mom" );
+#endif
+
+    assert ( quote (  "" )  ==  "\"\"" );
+    assert ( quote (  "a" ) ==  "\"a\"" );
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    assert ( quote ( L"" )  == L"\"\"" );
+    assert ( quote ( L"a" ) == L"\"a\"" );
+#endif
+
+    // missing end quote - must not hang
+    assert ( unquote (  "\"abc" ) ==  "abc" );
+    assert ( unquote (  "abc" ) == "abc" ); // no delimiter
+    assert ( unquote (  "abc def" ) ==  "abc" ); // no delimiter
+    assert ( unquote (  "" ) ==  "" ); // nothing there
+
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+    assert ( unquote ( L"\"abc" ) == L"abc" );
+    assert ( unquote ( L"abc" ) == L"abc" ); // no delimiter
+    assert ( unquote ( L"abc def" ) == L"abc" ); // no delimiter
+    assert ( unquote ( L"" ) == L"" ); // nothing there
+#endif
+
+    return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.ops/compare.pointer.pass.cpp

@@ -0,0 +1,130 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// constexpr int compare(const charT* s) const;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+
+int sign ( int x ) { return x > 0 ? 1 : ( x < 0 ? -1 : 0 ); }
+
+template<typename CharT>
+void test1 ( std::basic_string_view<CharT> sv1, const CharT *s, int expected ) {
+    assert ( sign( sv1.compare(s)) == sign(expected));
+}
+
+template<typename CharT>
+void
+test( const CharT *s1, const CharT *s2, int expected)
+{
+    typedef std::basic_string_view<CharT> string_view_t;
+    string_view_t sv1 ( s1 );
+    test1 ( sv1, s2, expected );
+}
+
+int main(int, char**)
+{
+    {
+    test("", "", 0);
+    test("", "abcde", -5);
+    test("", "abcdefghij", -10);
+    test("", "abcdefghijklmnopqrst", -20);
+    test("abcde", "", 5);
+    test("abcde", "abcde", 0);
+    test("abcde", "abcdefghij", -5);
+    test("abcde", "abcdefghijklmnopqrst", -15);
+    test("abcdefghij", "", 10);
+    test("abcdefghij", "abcde", 5);
+    test("abcdefghij", "abcdefghij", 0);
+    test("abcdefghij", "abcdefghijklmnopqrst", -10);
+    test("abcdefghijklmnopqrst", "", 20);
+    test("abcdefghijklmnopqrst", "abcde", 15);
+    test("abcdefghijklmnopqrst", "abcdefghij", 10);
+    test("abcdefghijklmnopqrst", "abcdefghijklmnopqrst", 0);
+    }
+
+    {
+    test(L"", L"", 0);
+    test(L"", L"abcde", -5);
+    test(L"", L"abcdefghij", -10);
+    test(L"", L"abcdefghijklmnopqrst", -20);
+    test(L"abcde", L"", 5);
+    test(L"abcde", L"abcde", 0);
+    test(L"abcde", L"abcdefghij", -5);
+    test(L"abcde", L"abcdefghijklmnopqrst", -15);
+    test(L"abcdefghij", L"", 10);
+    test(L"abcdefghij", L"abcde", 5);
+    test(L"abcdefghij", L"abcdefghij", 0);
+    test(L"abcdefghij", L"abcdefghijklmnopqrst", -10);
+    test(L"abcdefghijklmnopqrst", L"", 20);
+    test(L"abcdefghijklmnopqrst", L"abcde", 15);
+    test(L"abcdefghijklmnopqrst", L"abcdefghij", 10);
+    test(L"abcdefghijklmnopqrst", L"abcdefghijklmnopqrst", 0);
+    }
+
+#if TEST_STD_VER >= 11
+    {
+    test(U"", U"", 0);
+    test(U"", U"abcde", -5);
+    test(U"", U"abcdefghij", -10);
+    test(U"", U"abcdefghijklmnopqrst", -20);
+    test(U"abcde", U"", 5);
+    test(U"abcde", U"abcde", 0);
+    test(U"abcde", U"abcdefghij", -5);
+    test(U"abcde", U"abcdefghijklmnopqrst", -15);
+    test(U"abcdefghij", U"", 10);
+    test(U"abcdefghij", U"abcde", 5);
+    test(U"abcdefghij", U"abcdefghij", 0);
+    test(U"abcdefghij", U"abcdefghijklmnopqrst", -10);
+    test(U"abcdefghijklmnopqrst", U"", 20);
+    test(U"abcdefghijklmnopqrst", U"abcde", 15);
+    test(U"abcdefghijklmnopqrst", U"abcdefghij", 10);
+    test(U"abcdefghijklmnopqrst", U"abcdefghijklmnopqrst", 0);
+    }
+
+    {
+    test(u"", u"", 0);
+    test(u"", u"abcde", -5);
+    test(u"", u"abcdefghij", -10);
+    test(u"", u"abcdefghijklmnopqrst", -20);
+    test(u"abcde", u"", 5);
+    test(u"abcde", u"abcde", 0);
+    test(u"abcde", u"abcdefghij", -5);
+    test(u"abcde", u"abcdefghijklmnopqrst", -15);
+    test(u"abcdefghij", u"", 10);
+    test(u"abcdefghij", u"abcde", 5);
+    test(u"abcdefghij", u"abcdefghij", 0);
+    test(u"abcdefghij", u"abcdefghijklmnopqrst", -10);
+    test(u"abcdefghijklmnopqrst", u"", 20);
+    test(u"abcdefghijklmnopqrst", u"abcde", 15);
+    test(u"abcdefghijklmnopqrst", u"abcdefghij", 10);
+    test(u"abcdefghijklmnopqrst", u"abcdefghijklmnopqrst", 0);
+    }
+#endif
+
+#if TEST_STD_VER > 11
+    {
+    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
+    constexpr SV  sv1;
+    constexpr SV  sv2 { "abcde", 5 };
+    static_assert ( sv1.compare("") == 0, "" );
+    static_assert ( sv1.compare("abcde") < 0, "" );
+    static_assert ( sv2.compare("") > 0, "" );
+    static_assert ( sv2.compare("abcde") == 0, "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.ops/compare.pointer_size.pass.cpp

@@ -0,0 +1,456 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// constexpr int compare(size_type pos1, size_type n1, const charT* s) const;
+
+#include <string_view>
+#include <cassert>
+#include <stdexcept>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+
+int sign ( int x ) { return x > 0 ? 1 : ( x < 0 ? -1 : 0 ); }
+
+template<typename CharT>
+void test1 ( std::basic_string_view<CharT> sv1,
+             size_t pos1, size_t n1, const CharT *s, int expected ) {
+#ifdef TEST_HAS_NO_EXCEPTIONS
+    if (pos1 <= sv1.size())
+        assert(sign(sv1.compare(pos1, n1, s)) == sign(expected));
+#else
+    try {
+        assert(sign(sv1.compare(pos1, n1, s)) == sign(expected));
+        assert(pos1 <= sv1.size());
+    }
+    catch (const std::out_of_range&) {
+        assert(pos1 > sv1.size());
+    }
+#endif
+}
+
+template<typename CharT>
+void
+test( const CharT *s1, size_t pos1, size_t n1, const CharT *s2, int expected)
+{
+    typedef std::basic_string_view<CharT> string_view_t;
+    string_view_t sv1 ( s1 );
+    test1 ( sv1, pos1, n1, s2, expected );
+}
+
+void test0()
+{
+    test("", 0, 0, "", 0);
+    test("", 0, 0, "abcde", -5);
+    test("", 0, 0, "abcdefghij", -10);
+    test("", 0, 0, "abcdefghijklmnopqrst", -20);
+    test("", 0, 1, "", 0);
+    test("", 0, 1, "abcde", -5);
+    test("", 0, 1, "abcdefghij", -10);
+    test("", 0, 1, "abcdefghijklmnopqrst", -20);
+    test("", 1, 0, "", 0);
+    test("", 1, 0, "abcde", 0);
+    test("", 1, 0, "abcdefghij", 0);
+    test("", 1, 0, "abcdefghijklmnopqrst", 0);
+    test("abcde", 0, 0, "", 0);
+    test("abcde", 0, 0, "abcde", -5);
+    test("abcde", 0, 0, "abcdefghij", -10);
+    test("abcde", 0, 0, "abcdefghijklmnopqrst", -20);
+    test("abcde", 0, 1, "", 1);
+    test("abcde", 0, 1, "abcde", -4);
+    test("abcde", 0, 1, "abcdefghij", -9);
+    test("abcde", 0, 1, "abcdefghijklmnopqrst", -19);
+    test("abcde", 0, 2, "", 2);
+    test("abcde", 0, 2, "abcde", -3);
+    test("abcde", 0, 2, "abcdefghij", -8);
+    test("abcde", 0, 2, "abcdefghijklmnopqrst", -18);
+    test("abcde", 0, 4, "", 4);
+    test("abcde", 0, 4, "abcde", -1);
+    test("abcde", 0, 4, "abcdefghij", -6);
+    test("abcde", 0, 4, "abcdefghijklmnopqrst", -16);
+    test("abcde", 0, 5, "", 5);
+    test("abcde", 0, 5, "abcde", 0);
+    test("abcde", 0, 5, "abcdefghij", -5);
+    test("abcde", 0, 5, "abcdefghijklmnopqrst", -15);
+    test("abcde", 0, 6, "", 5);
+    test("abcde", 0, 6, "abcde", 0);
+    test("abcde", 0, 6, "abcdefghij", -5);
+    test("abcde", 0, 6, "abcdefghijklmnopqrst", -15);
+    test("abcde", 1, 0, "", 0);
+    test("abcde", 1, 0, "abcde", -5);
+    test("abcde", 1, 0, "abcdefghij", -10);
+    test("abcde", 1, 0, "abcdefghijklmnopqrst", -20);
+    test("abcde", 1, 1, "", 1);
+    test("abcde", 1, 1, "abcde", 1);
+    test("abcde", 1, 1, "abcdefghij", 1);
+    test("abcde", 1, 1, "abcdefghijklmnopqrst", 1);
+    test("abcde", 1, 2, "", 2);
+    test("abcde", 1, 2, "abcde", 1);
+    test("abcde", 1, 2, "abcdefghij", 1);
+    test("abcde", 1, 2, "abcdefghijklmnopqrst", 1);
+    test("abcde", 1, 3, "", 3);
+    test("abcde", 1, 3, "abcde", 1);
+    test("abcde", 1, 3, "abcdefghij", 1);
+    test("abcde", 1, 3, "abcdefghijklmnopqrst", 1);
+    test("abcde", 1, 4, "", 4);
+    test("abcde", 1, 4, "abcde", 1);
+    test("abcde", 1, 4, "abcdefghij", 1);
+    test("abcde", 1, 4, "abcdefghijklmnopqrst", 1);
+    test("abcde", 1, 5, "", 4);
+    test("abcde", 1, 5, "abcde", 1);
+    test("abcde", 1, 5, "abcdefghij", 1);
+    test("abcde", 1, 5, "abcdefghijklmnopqrst", 1);
+    test("abcde", 2, 0, "", 0);
+    test("abcde", 2, 0, "abcde", -5);
+    test("abcde", 2, 0, "abcdefghij", -10);
+    test("abcde", 2, 0, "abcdefghijklmnopqrst", -20);
+    test("abcde", 2, 1, "", 1);
+    test("abcde", 2, 1, "abcde", 2);
+    test("abcde", 2, 1, "abcdefghij", 2);
+    test("abcde", 2, 1, "abcdefghijklmnopqrst", 2);
+    test("abcde", 2, 2, "", 2);
+    test("abcde", 2, 2, "abcde", 2);
+    test("abcde", 2, 2, "abcdefghij", 2);
+    test("abcde", 2, 2, "abcdefghijklmnopqrst", 2);
+    test("abcde", 2, 3, "", 3);
+    test("abcde", 2, 3, "abcde", 2);
+    test("abcde", 2, 3, "abcdefghij", 2);
+    test("abcde", 2, 3, "abcdefghijklmnopqrst", 2);
+    test("abcde", 2, 4, "", 3);
+    test("abcde", 2, 4, "abcde", 2);
+    test("abcde", 2, 4, "abcdefghij", 2);
+    test("abcde", 2, 4, "abcdefghijklmnopqrst", 2);
+    test("abcde", 4, 0, "", 0);
+    test("abcde", 4, 0, "abcde", -5);
+    test("abcde", 4, 0, "abcdefghij", -10);
+    test("abcde", 4, 0, "abcdefghijklmnopqrst", -20);
+    test("abcde", 4, 1, "", 1);
+    test("abcde", 4, 1, "abcde", 4);
+    test("abcde", 4, 1, "abcdefghij", 4);
+    test("abcde", 4, 1, "abcdefghijklmnopqrst", 4);
+    test("abcde", 4, 2, "", 1);
+    test("abcde", 4, 2, "abcde", 4);
+    test("abcde", 4, 2, "abcdefghij", 4);
+    test("abcde", 4, 2, "abcdefghijklmnopqrst", 4);
+    test("abcde", 5, 0, "", 0);
+    test("abcde", 5, 0, "abcde", -5);
+    test("abcde", 5, 0, "abcdefghij", -10);
+    test("abcde", 5, 0, "abcdefghijklmnopqrst", -20);
+    test("abcde", 5, 1, "", 0);
+    test("abcde", 5, 1, "abcde", -5);
+    test("abcde", 5, 1, "abcdefghij", -10);
+    test("abcde", 5, 1, "abcdefghijklmnopqrst", -20);
+}
+
+void test1()
+{
+    test("abcde", 6, 0, "", 0);
+    test("abcde", 6, 0, "abcde", 0);
+    test("abcde", 6, 0, "abcdefghij", 0);
+    test("abcde", 6, 0, "abcdefghijklmnopqrst", 0);
+    test("abcdefghij", 0, 0, "", 0);
+    test("abcdefghij", 0, 0, "abcde", -5);
+    test("abcdefghij", 0, 0, "abcdefghij", -10);
+    test("abcdefghij", 0, 0, "abcdefghijklmnopqrst", -20);
+    test("abcdefghij", 0, 1, "", 1);
+    test("abcdefghij", 0, 1, "abcde", -4);
+    test("abcdefghij", 0, 1, "abcdefghij", -9);
+    test("abcdefghij", 0, 1, "abcdefghijklmnopqrst", -19);
+    test("abcdefghij", 0, 5, "", 5);
+    test("abcdefghij", 0, 5, "abcde", 0);
+    test("abcdefghij", 0, 5, "abcdefghij", -5);
+    test("abcdefghij", 0, 5, "abcdefghijklmnopqrst", -15);
+    test("abcdefghij", 0, 9, "", 9);
+    test("abcdefghij", 0, 9, "abcde", 4);
+    test("abcdefghij", 0, 9, "abcdefghij", -1);
+    test("abcdefghij", 0, 9, "abcdefghijklmnopqrst", -11);
+    test("abcdefghij", 0, 10, "", 10);
+    test("abcdefghij", 0, 10, "abcde", 5);
+    test("abcdefghij", 0, 10, "abcdefghij", 0);
+    test("abcdefghij", 0, 10, "abcdefghijklmnopqrst", -10);
+    test("abcdefghij", 0, 11, "", 10);
+    test("abcdefghij", 0, 11, "abcde", 5);
+    test("abcdefghij", 0, 11, "abcdefghij", 0);
+    test("abcdefghij", 0, 11, "abcdefghijklmnopqrst", -10);
+    test("abcdefghij", 1, 0, "", 0);
+    test("abcdefghij", 1, 0, "abcde", -5);
+    test("abcdefghij", 1, 0, "abcdefghij", -10);
+    test("abcdefghij", 1, 0, "abcdefghijklmnopqrst", -20);
+    test("abcdefghij", 1, 1, "", 1);
+    test("abcdefghij", 1, 1, "abcde", 1);
+    test("abcdefghij", 1, 1, "abcdefghij", 1);
+    test("abcdefghij", 1, 1, "abcdefghijklmnopqrst", 1);
+    test("abcdefghij", 1, 4, "", 4);
+    test("abcdefghij", 1, 4, "abcde", 1);
+    test("abcdefghij", 1, 4, "abcdefghij", 1);
+    test("abcdefghij", 1, 4, "abcdefghijklmnopqrst", 1);
+    test("abcdefghij", 1, 8, "", 8);
+    test("abcdefghij", 1, 8, "abcde", 1);
+    test("abcdefghij", 1, 8, "abcdefghij", 1);
+    test("abcdefghij", 1, 8, "abcdefghijklmnopqrst", 1);
+    test("abcdefghij", 1, 9, "", 9);
+    test("abcdefghij", 1, 9, "abcde", 1);
+    test("abcdefghij", 1, 9, "abcdefghij", 1);
+    test("abcdefghij", 1, 9, "abcdefghijklmnopqrst", 1);
+    test("abcdefghij", 1, 10, "", 9);
+    test("abcdefghij", 1, 10, "abcde", 1);
+    test("abcdefghij", 1, 10, "abcdefghij", 1);
+    test("abcdefghij", 1, 10, "abcdefghijklmnopqrst", 1);
+    test("abcdefghij", 5, 0, "", 0);
+    test("abcdefghij", 5, 0, "abcde", -5);
+    test("abcdefghij", 5, 0, "abcdefghij", -10);
+    test("abcdefghij", 5, 0, "abcdefghijklmnopqrst", -20);
+    test("abcdefghij", 5, 1, "", 1);
+    test("abcdefghij", 5, 1, "abcde", 5);
+    test("abcdefghij", 5, 1, "abcdefghij", 5);
+    test("abcdefghij", 5, 1, "abcdefghijklmnopqrst", 5);
+    test("abcdefghij", 5, 2, "", 2);
+    test("abcdefghij", 5, 2, "abcde", 5);
+    test("abcdefghij", 5, 2, "abcdefghij", 5);
+    test("abcdefghij", 5, 2, "abcdefghijklmnopqrst", 5);
+    test("abcdefghij", 5, 4, "", 4);
+    test("abcdefghij", 5, 4, "abcde", 5);
+    test("abcdefghij", 5, 4, "abcdefghij", 5);
+    test("abcdefghij", 5, 4, "abcdefghijklmnopqrst", 5);
+    test("abcdefghij", 5, 5, "", 5);
+    test("abcdefghij", 5, 5, "abcde", 5);
+    test("abcdefghij", 5, 5, "abcdefghij", 5);
+    test("abcdefghij", 5, 5, "abcdefghijklmnopqrst", 5);
+    test("abcdefghij", 5, 6, "", 5);
+    test("abcdefghij", 5, 6, "abcde", 5);
+    test("abcdefghij", 5, 6, "abcdefghij", 5);
+    test("abcdefghij", 5, 6, "abcdefghijklmnopqrst", 5);
+    test("abcdefghij", 9, 0, "", 0);
+    test("abcdefghij", 9, 0, "abcde", -5);
+    test("abcdefghij", 9, 0, "abcdefghij", -10);
+    test("abcdefghij", 9, 0, "abcdefghijklmnopqrst", -20);
+    test("abcdefghij", 9, 1, "", 1);
+    test("abcdefghij", 9, 1, "abcde", 9);
+    test("abcdefghij", 9, 1, "abcdefghij", 9);
+    test("abcdefghij", 9, 1, "abcdefghijklmnopqrst", 9);
+    test("abcdefghij", 9, 2, "", 1);
+    test("abcdefghij", 9, 2, "abcde", 9);
+    test("abcdefghij", 9, 2, "abcdefghij", 9);
+    test("abcdefghij", 9, 2, "abcdefghijklmnopqrst", 9);
+    test("abcdefghij", 10, 0, "", 0);
+    test("abcdefghij", 10, 0, "abcde", -5);
+    test("abcdefghij", 10, 0, "abcdefghij", -10);
+    test("abcdefghij", 10, 0, "abcdefghijklmnopqrst", -20);
+    test("abcdefghij", 10, 1, "", 0);
+    test("abcdefghij", 10, 1, "abcde", -5);
+    test("abcdefghij", 10, 1, "abcdefghij", -10);
+    test("abcdefghij", 10, 1, "abcdefghijklmnopqrst", -20);
+    test("abcdefghij", 11, 0, "", 0);
+    test("abcdefghij", 11, 0, "abcde", 0);
+    test("abcdefghij", 11, 0, "abcdefghij", 0);
+    test("abcdefghij", 11, 0, "abcdefghijklmnopqrst", 0);
+}
+
+void test2()
+{
+    test("abcdefghijklmnopqrst", 0, 0, "", 0);
+    test("abcdefghijklmnopqrst", 0, 0, "abcde", -5);
+    test("abcdefghijklmnopqrst", 0, 0, "abcdefghij", -10);
+    test("abcdefghijklmnopqrst", 0, 0, "abcdefghijklmnopqrst", -20);
+    test("abcdefghijklmnopqrst", 0, 1, "", 1);
+    test("abcdefghijklmnopqrst", 0, 1, "abcde", -4);
+    test("abcdefghijklmnopqrst", 0, 1, "abcdefghij", -9);
+    test("abcdefghijklmnopqrst", 0, 1, "abcdefghijklmnopqrst", -19);
+    test("abcdefghijklmnopqrst", 0, 10, "", 10);
+    test("abcdefghijklmnopqrst", 0, 10, "abcde", 5);
+    test("abcdefghijklmnopqrst", 0, 10, "abcdefghij", 0);
+    test("abcdefghijklmnopqrst", 0, 10, "abcdefghijklmnopqrst", -10);
+    test("abcdefghijklmnopqrst", 0, 19, "", 19);
+    test("abcdefghijklmnopqrst", 0, 19, "abcde", 14);
+    test("abcdefghijklmnopqrst", 0, 19, "abcdefghij", 9);
+    test("abcdefghijklmnopqrst", 0, 19, "abcdefghijklmnopqrst", -1);
+    test("abcdefghijklmnopqrst", 0, 20, "", 20);
+    test("abcdefghijklmnopqrst", 0, 20, "abcde", 15);
+    test("abcdefghijklmnopqrst", 0, 20, "abcdefghij", 10);
+    test("abcdefghijklmnopqrst", 0, 20, "abcdefghijklmnopqrst", 0);
+    test("abcdefghijklmnopqrst", 0, 21, "", 20);
+    test("abcdefghijklmnopqrst", 0, 21, "abcde", 15);
+    test("abcdefghijklmnopqrst", 0, 21, "abcdefghij", 10);
+    test("abcdefghijklmnopqrst", 0, 21, "abcdefghijklmnopqrst", 0);
+    test("abcdefghijklmnopqrst", 1, 0, "", 0);
+    test("abcdefghijklmnopqrst", 1, 0, "abcde", -5);
+    test("abcdefghijklmnopqrst", 1, 0, "abcdefghij", -10);
+    test("abcdefghijklmnopqrst", 1, 0, "abcdefghijklmnopqrst", -20);
+    test("abcdefghijklmnopqrst", 1, 1, "", 1);
+    test("abcdefghijklmnopqrst", 1, 1, "abcde", 1);
+    test("abcdefghijklmnopqrst", 1, 1, "abcdefghij", 1);
+    test("abcdefghijklmnopqrst", 1, 1, "abcdefghijklmnopqrst", 1);
+    test("abcdefghijklmnopqrst", 1, 9, "", 9);
+    test("abcdefghijklmnopqrst", 1, 9, "abcde", 1);
+    test("abcdefghijklmnopqrst", 1, 9, "abcdefghij", 1);
+    test("abcdefghijklmnopqrst", 1, 9, "abcdefghijklmnopqrst", 1);
+    test("abcdefghijklmnopqrst", 1, 18, "", 18);
+    test("abcdefghijklmnopqrst", 1, 18, "abcde", 1);
+    test("abcdefghijklmnopqrst", 1, 18, "abcdefghij", 1);
+    test("abcdefghijklmnopqrst", 1, 18, "abcdefghijklmnopqrst", 1);
+    test("abcdefghijklmnopqrst", 1, 19, "", 19);
+    test("abcdefghijklmnopqrst", 1, 19, "abcde", 1);
+    test("abcdefghijklmnopqrst", 1, 19, "abcdefghij", 1);
+    test("abcdefghijklmnopqrst", 1, 19, "abcdefghijklmnopqrst", 1);
+    test("abcdefghijklmnopqrst", 1, 20, "", 19);
+    test("abcdefghijklmnopqrst", 1, 20, "abcde", 1);
+    test("abcdefghijklmnopqrst", 1, 20, "abcdefghij", 1);
+    test("abcdefghijklmnopqrst", 1, 20, "abcdefghijklmnopqrst", 1);
+    test("abcdefghijklmnopqrst", 10, 0, "", 0);
+    test("abcdefghijklmnopqrst", 10, 0, "abcde", -5);
+    test("abcdefghijklmnopqrst", 10, 0, "abcdefghij", -10);
+    test("abcdefghijklmnopqrst", 10, 0, "abcdefghijklmnopqrst", -20);
+    test("abcdefghijklmnopqrst", 10, 1, "", 1);
+    test("abcdefghijklmnopqrst", 10, 1, "abcde", 10);
+    test("abcdefghijklmnopqrst", 10, 1, "abcdefghij", 10);
+    test("abcdefghijklmnopqrst", 10, 1, "abcdefghijklmnopqrst", 10);
+    test("abcdefghijklmnopqrst", 10, 5, "", 5);
+    test("abcdefghijklmnopqrst", 10, 5, "abcde", 10);
+    test("abcdefghijklmnopqrst", 10, 5, "abcdefghij", 10);
+    test("abcdefghijklmnopqrst", 10, 5, "abcdefghijklmnopqrst", 10);
+    test("abcdefghijklmnopqrst", 10, 9, "", 9);
+    test("abcdefghijklmnopqrst", 10, 9, "abcde", 10);
+    test("abcdefghijklmnopqrst", 10, 9, "abcdefghij", 10);
+    test("abcdefghijklmnopqrst", 10, 9, "abcdefghijklmnopqrst", 10);
+    test("abcdefghijklmnopqrst", 10, 10, "", 10);
+    test("abcdefghijklmnopqrst", 10, 10, "abcde", 10);
+    test("abcdefghijklmnopqrst", 10, 10, "abcdefghij", 10);
+    test("abcdefghijklmnopqrst", 10, 10, "abcdefghijklmnopqrst", 10);
+    test("abcdefghijklmnopqrst", 10, 11, "", 10);
+    test("abcdefghijklmnopqrst", 10, 11, "abcde", 10);
+    test("abcdefghijklmnopqrst", 10, 11, "abcdefghij", 10);
+    test("abcdefghijklmnopqrst", 10, 11, "abcdefghijklmnopqrst", 10);
+    test("abcdefghijklmnopqrst", 19, 0, "", 0);
+    test("abcdefghijklmnopqrst", 19, 0, "abcde", -5);
+    test("abcdefghijklmnopqrst", 19, 0, "abcdefghij", -10);
+    test("abcdefghijklmnopqrst", 19, 0, "abcdefghijklmnopqrst", -20);
+    test("abcdefghijklmnopqrst", 19, 1, "", 1);
+    test("abcdefghijklmnopqrst", 19, 1, "abcde", 19);
+    test("abcdefghijklmnopqrst", 19, 1, "abcdefghij", 19);
+    test("abcdefghijklmnopqrst", 19, 1, "abcdefghijklmnopqrst", 19);
+    test("abcdefghijklmnopqrst", 19, 2, "", 1);
+    test("abcdefghijklmnopqrst", 19, 2, "abcde", 19);
+    test("abcdefghijklmnopqrst", 19, 2, "abcdefghij", 19);
+    test("abcdefghijklmnopqrst", 19, 2, "abcdefghijklmnopqrst", 19);
+    test("abcdefghijklmnopqrst", 20, 0, "", 0);
+    test("abcdefghijklmnopqrst", 20, 0, "abcde", -5);
+    test("abcdefghijklmnopqrst", 20, 0, "abcdefghij", -10);
+    test("abcdefghijklmnopqrst", 20, 0, "abcdefghijklmnopqrst", -20);
+    test("abcdefghijklmnopqrst", 20, 1, "", 0);
+    test("abcdefghijklmnopqrst", 20, 1, "abcde", -5);
+    test("abcdefghijklmnopqrst", 20, 1, "abcdefghij", -10);
+    test("abcdefghijklmnopqrst", 20, 1, "abcdefghijklmnopqrst", -20);
+    test("abcdefghijklmnopqrst", 21, 0, "", 0);
+    test("abcdefghijklmnopqrst", 21, 0, "abcde", 0);
+    test("abcdefghijklmnopqrst", 21, 0, "abcdefghij", 0);
+    test("abcdefghijklmnopqrst", 21, 0, "abcdefghijklmnopqrst", 0);
+}
+
+
+int main(int, char**)
+{
+    test0();
+    test1();
+    test2();
+
+    {
+    test("", 0, 0, "", 0);
+    test("", 0, 0, "abcde", -5);
+    test("", 0, 0, "abcdefghij", -10);
+    test("", 0, 0, "abcdefghijklmnopqrst", -20);
+    test("abcde", 0, 2, "", 5);
+    test("abcde", 0, 6,"abcde", 0);
+    test("abcde", 0, 6, "abcdefghij", -5);
+    test("abcde", 0, 6, "abcdefghijklmnopqrst", -15);
+    test("abcdefghij", 3, 3, "", 10);
+    test("abcdefghij", 3, 3,"abcde", 5);
+    test("abcdefghij", 3, 3, "def", 0);
+    test("abcdefghij", 0, 4, "abcdefghijklmnopqrst", -10);
+    test("abcdefghijklmnopqrst", 5, 5, "", 20);
+    test("abcdefghijklmnopqrst", 0, 8, "abcde", 15);
+    test("abcdefghijklmnopqrst", 0, 12, "abcdefghij", 10);
+    test("abcdefghijklmnopqrst", 0, static_cast<size_t>(-1), "abcdefghijklmnopqrst", 0);
+    }
+
+    {
+    test(L"", 0, 0, L"", 0);
+    test(L"", 0, 0, L"abcde", -5);
+    test(L"", 0, 0, L"abcdefghij", -10);
+    test(L"", 0, 0, L"abcdefghijklmnopqrst", -20);
+    test(L"abcde", 0, 2, L"", 5);
+    test(L"abcde", 0, 6, L"abcde", 0);
+    test(L"abcde", 0, 6, L"abcdefghij", -5);
+    test(L"abcde", 0, 6, L"abcdefghijklmnopqrst", -15);
+    test(L"abcdefghij", 3, 3, L"", 10);
+    test(L"abcdefghij", 3, 3, L"abcde", 5);
+    test(L"abcdefghij", 3, 3, L"def", 0);
+    test(L"abcdefghij", 0, 4, L"abcdefghijklmnopqrst", -10);
+    test(L"abcdefghijklmnopqrst", 5, 5, L"", 20);
+    test(L"abcdefghijklmnopqrst", 0, 8, L"abcde", 15);
+    test(L"abcdefghijklmnopqrst", 0, 12, L"abcdefghij", 10);
+    test(L"abcdefghijklmnopqrst", 0, static_cast<size_t>(-1), L"abcdefghijklmnopqrst", 0);
+    }
+
+#if TEST_STD_VER >= 11
+    {
+    test(U"", 0, 0, U"", 0);
+    test(U"", 0, 0, U"abcde", -5);
+    test(U"", 0, 0, U"abcdefghij", -10);
+    test(U"", 0, 0, U"abcdefghijklmnopqrst", -20);
+    test(U"abcde", 0, 2, U"", 5);
+    test(U"abcde", 0, 6, U"abcde", 0);
+    test(U"abcde", 0, 6, U"abcdefghij", -5);
+    test(U"abcde", 0, 6, U"abcdefghijklmnopqrst", -15);
+    test(U"abcdefghij", 3, 3, U"", 10);
+    test(U"abcdefghij", 3, 3, U"abcde", 5);
+    test(U"abcdefghij", 3, 3, U"def", 0);
+    test(U"abcdefghij", 0, 4, U"abcdefghijklmnopqrst", -10);
+    test(U"abcdefghijklmnopqrst", 5, 5, U"", 20);
+    test(U"abcdefghijklmnopqrst", 0, 8, U"abcde", 15);
+    test(U"abcdefghijklmnopqrst", 0, 12, U"abcdefghij", 10);
+    test(U"abcdefghijklmnopqrst", 0, static_cast<size_t>(-1), U"abcdefghijklmnopqrst", 0);
+    }
+
+    {
+    test(u"", 0, 0, u"", 0);
+    test(u"", 0, 0, u"abcde", -5);
+    test(u"", 0, 0, u"abcdefghij", -10);
+    test(u"", 0, 0, u"abcdefghijklmnopqrst", -20);
+    test(u"abcde", 0, 2, u"", 5);
+    test(u"abcde", 0, 6, u"abcde", 0);
+    test(u"abcde", 0, 6, u"abcdefghij", -5);
+    test(u"abcde", 0, 6, u"abcdefghijklmnopqrst", -15);
+    test(u"abcdefghij", 3, 3, u"", 10);
+    test(u"abcdefghij", 3, 3, u"abcde", 5);
+    test(u"abcdefghij", 3, 3, u"def", 0);
+    test(u"abcdefghij", 0, 4, u"abcdefghijklmnopqrst", -10);
+    test(u"abcdefghijklmnopqrst", 5, 5, u"", 20);
+    test(u"abcdefghijklmnopqrst", 0, 8, u"abcde", 15);
+    test(u"abcdefghijklmnopqrst", 0, 12, u"abcdefghij", 10);
+    test(u"abcdefghijklmnopqrst", 0, static_cast<size_t>(-1), u"abcdefghijklmnopqrst", 0);
+    }
+#endif
+
+#if TEST_STD_VER > 11
+    {
+    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
+    constexpr SV  sv1;
+    constexpr SV  sv2 { "abcde", 5 };
+    static_assert ( sv1.compare(0, 0, "") == 0, "" );
+    static_assert ( sv1.compare(0, 0, "abcde") < 0, "" );
+    static_assert ( sv2.compare(0, 2, "") > 0, "" );
+    static_assert ( sv2.compare(0, 6, "abcde") == 0, "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.ops/compare.size_size_sv.pass.cpp

@@ -0,0 +1,405 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// constexpr int compare(size_type pos1, size_type n1, basic_string_view str) const;
+
+#include <string_view>
+#include <cassert>
+#include <stdexcept>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+
+int sign ( int x ) { return x > 0 ? 1 : ( x < 0 ? -1 : 0 ); }
+
+template<typename CharT>
+void test1 ( std::basic_string_view<CharT> sv1, size_t pos1, size_t n1,
+            std::basic_string_view<CharT> sv2, int expected ) {
+#ifdef TEST_HAS_NO_EXCEPTIONS
+    if (pos1 <= sv1.size())
+        assert(sign( sv1.compare(pos1, n1, sv2)) == sign(expected));
+#else
+    try {
+        assert(sign( sv1.compare(pos1, n1, sv2)) == sign(expected));
+        assert(pos1 <= sv1.size());
+    }
+    catch (const std::out_of_range&) {
+        assert(pos1 > sv1.size());
+    }
+#endif
+}
+
+
+template<typename CharT>
+void test ( const CharT *s1, size_t pos1, size_t n1, const CharT  *s2, int expected ) {
+    typedef std::basic_string_view<CharT> string_view_t;
+    string_view_t sv1 ( s1 );
+    string_view_t sv2 ( s2 );
+    test1(sv1, pos1, n1, sv2, expected);
+}
+
+void test0()
+{
+    test("", 0, 0, "", 0);
+    test("", 0, 0, "abcde", -5);
+    test("", 0, 0, "abcdefghij", -10);
+    test("", 0, 0, "abcdefghijklmnopqrst", -20);
+    test("", 0, 1, "", 0);
+    test("", 0, 1, "abcde", -5);
+    test("", 0, 1, "abcdefghij", -10);
+    test("", 0, 1, "abcdefghijklmnopqrst", -20);
+    test("", 1, 0, "", 0);
+    test("", 1, 0, "abcde", 0);
+    test("", 1, 0, "abcdefghij", 0);
+    test("", 1, 0, "abcdefghijklmnopqrst", 0);
+    test("abcde", 0, 0, "", 0);
+    test("abcde", 0, 0, "abcde", -5);
+    test("abcde", 0, 0, "abcdefghij", -10);
+    test("abcde", 0, 0, "abcdefghijklmnopqrst", -20);
+    test("abcde", 0, 1, "", 1);
+    test("abcde", 0, 1, "abcde", -4);
+    test("abcde", 0, 1, "abcdefghij", -9);
+    test("abcde", 0, 1, "abcdefghijklmnopqrst", -19);
+    test("abcde", 0, 2, "", 2);
+    test("abcde", 0, 2, "abcde", -3);
+    test("abcde", 0, 2, "abcdefghij", -8);
+    test("abcde", 0, 2, "abcdefghijklmnopqrst", -18);
+    test("abcde", 0, 4, "", 4);
+    test("abcde", 0, 4, "abcde", -1);
+    test("abcde", 0, 4, "abcdefghij", -6);
+    test("abcde", 0, 4, "abcdefghijklmnopqrst", -16);
+    test("abcde", 0, 5, "", 5);
+    test("abcde", 0, 5, "abcde", 0);
+    test("abcde", 0, 5, "abcdefghij", -5);
+    test("abcde", 0, 5, "abcdefghijklmnopqrst", -15);
+    test("abcde", 0, 6, "", 5);
+    test("abcde", 0, 6, "abcde", 0);
+    test("abcde", 0, 6, "abcdefghij", -5);
+    test("abcde", 0, 6, "abcdefghijklmnopqrst", -15);
+    test("abcde", 1, 0, "", 0);
+    test("abcde", 1, 0, "abcde", -5);
+    test("abcde", 1, 0, "abcdefghij", -10);
+    test("abcde", 1, 0, "abcdefghijklmnopqrst", -20);
+    test("abcde", 1, 1, "", 1);
+    test("abcde", 1, 1, "abcde", 1);
+    test("abcde", 1, 1, "abcdefghij", 1);
+    test("abcde", 1, 1, "abcdefghijklmnopqrst", 1);
+    test("abcde", 1, 2, "", 2);
+    test("abcde", 1, 2, "abcde", 1);
+    test("abcde", 1, 2, "abcdefghij", 1);
+    test("abcde", 1, 2, "abcdefghijklmnopqrst", 1);
+    test("abcde", 1, 3, "", 3);
+    test("abcde", 1, 3, "abcde", 1);
+    test("abcde", 1, 3, "abcdefghij", 1);
+    test("abcde", 1, 3, "abcdefghijklmnopqrst", 1);
+    test("abcde", 1, 4, "", 4);
+    test("abcde", 1, 4, "abcde", 1);
+    test("abcde", 1, 4, "abcdefghij", 1);
+    test("abcde", 1, 4, "abcdefghijklmnopqrst", 1);
+    test("abcde", 1, 5, "", 4);
+    test("abcde", 1, 5, "abcde", 1);
+    test("abcde", 1, 5, "abcdefghij", 1);
+    test("abcde", 1, 5, "abcdefghijklmnopqrst", 1);
+    test("abcde", 2, 0, "", 0);
+    test("abcde", 2, 0, "abcde", -5);
+    test("abcde", 2, 0, "abcdefghij", -10);
+    test("abcde", 2, 0, "abcdefghijklmnopqrst", -20);
+    test("abcde", 2, 1, "", 1);
+    test("abcde", 2, 1, "abcde", 2);
+    test("abcde", 2, 1, "abcdefghij", 2);
+    test("abcde", 2, 1, "abcdefghijklmnopqrst", 2);
+    test("abcde", 2, 2, "", 2);
+    test("abcde", 2, 2, "abcde", 2);
+    test("abcde", 2, 2, "abcdefghij", 2);
+    test("abcde", 2, 2, "abcdefghijklmnopqrst", 2);
+    test("abcde", 2, 3, "", 3);
+    test("abcde", 2, 3, "abcde", 2);
+    test("abcde", 2, 3, "abcdefghij", 2);
+    test("abcde", 2, 3, "abcdefghijklmnopqrst", 2);
+    test("abcde", 2, 4, "", 3);
+    test("abcde", 2, 4, "abcde", 2);
+    test("abcde", 2, 4, "abcdefghij", 2);
+    test("abcde", 2, 4, "abcdefghijklmnopqrst", 2);
+    test("abcde", 4, 0, "", 0);
+    test("abcde", 4, 0, "abcde", -5);
+    test("abcde", 4, 0, "abcdefghij", -10);
+    test("abcde", 4, 0, "abcdefghijklmnopqrst", -20);
+    test("abcde", 4, 1, "", 1);
+    test("abcde", 4, 1, "abcde", 4);
+    test("abcde", 4, 1, "abcdefghij", 4);
+    test("abcde", 4, 1, "abcdefghijklmnopqrst", 4);
+    test("abcde", 4, 2, "", 1);
+    test("abcde", 4, 2, "abcde", 4);
+    test("abcde", 4, 2, "abcdefghij", 4);
+    test("abcde", 4, 2, "abcdefghijklmnopqrst", 4);
+    test("abcde", 5, 0, "", 0);
+    test("abcde", 5, 0, "abcde", -5);
+    test("abcde", 5, 0, "abcdefghij", -10);
+    test("abcde", 5, 0, "abcdefghijklmnopqrst", -20);
+    test("abcde", 5, 1, "", 0);
+    test("abcde", 5, 1, "abcde", -5);
+    test("abcde", 5, 1, "abcdefghij", -10);
+    test("abcde", 5, 1, "abcdefghijklmnopqrst", -20);
+}
+
+void test1()
+{
+    test("abcde", 6, 0, "", 0);
+    test("abcde", 6, 0, "abcde", 0);
+    test("abcde", 6, 0, "abcdefghij", 0);
+    test("abcde", 6, 0, "abcdefghijklmnopqrst", 0);
+    test("abcdefghij", 0, 0, "", 0);
+    test("abcdefghij", 0, 0, "abcde", -5);
+    test("abcdefghij", 0, 0, "abcdefghij", -10);
+    test("abcdefghij", 0, 0, "abcdefghijklmnopqrst", -20);
+    test("abcdefghij", 0, 1, "", 1);
+    test("abcdefghij", 0, 1, "abcde", -4);
+    test("abcdefghij", 0, 1, "abcdefghij", -9);
+    test("abcdefghij", 0, 1, "abcdefghijklmnopqrst", -19);
+    test("abcdefghij", 0, 5, "", 5);
+    test("abcdefghij", 0, 5, "abcde", 0);
+    test("abcdefghij", 0, 5, "abcdefghij", -5);
+    test("abcdefghij", 0, 5, "abcdefghijklmnopqrst", -15);
+    test("abcdefghij", 0, 9, "", 9);
+    test("abcdefghij", 0, 9, "abcde", 4);
+    test("abcdefghij", 0, 9, "abcdefghij", -1);
+    test("abcdefghij", 0, 9, "abcdefghijklmnopqrst", -11);
+    test("abcdefghij", 0, 10, "", 10);
+    test("abcdefghij", 0, 10, "abcde", 5);
+    test("abcdefghij", 0, 10, "abcdefghij", 0);
+    test("abcdefghij", 0, 10, "abcdefghijklmnopqrst", -10);
+    test("abcdefghij", 0, 11, "", 10);
+    test("abcdefghij", 0, 11, "abcde", 5);
+    test("abcdefghij", 0, 11, "abcdefghij", 0);
+    test("abcdefghij", 0, 11, "abcdefghijklmnopqrst", -10);
+    test("abcdefghij", 1, 0, "", 0);
+    test("abcdefghij", 1, 0, "abcde", -5);
+    test("abcdefghij", 1, 0, "abcdefghij", -10);
+    test("abcdefghij", 1, 0, "abcdefghijklmnopqrst", -20);
+    test("abcdefghij", 1, 1, "", 1);
+    test("abcdefghij", 1, 1, "abcde", 1);
+    test("abcdefghij", 1, 1, "abcdefghij", 1);
+    test("abcdefghij", 1, 1, "abcdefghijklmnopqrst", 1);
+    test("abcdefghij", 1, 4, "", 4);
+    test("abcdefghij", 1, 4, "abcde", 1);
+    test("abcdefghij", 1, 4, "abcdefghij", 1);
+    test("abcdefghij", 1, 4, "abcdefghijklmnopqrst", 1);
+    test("abcdefghij", 1, 8, "", 8);
+    test("abcdefghij", 1, 8, "abcde", 1);
+    test("abcdefghij", 1, 8, "abcdefghij", 1);
+    test("abcdefghij", 1, 8, "abcdefghijklmnopqrst", 1);
+    test("abcdefghij", 1, 9, "", 9);
+    test("abcdefghij", 1, 9, "abcde", 1);
+    test("abcdefghij", 1, 9, "abcdefghij", 1);
+    test("abcdefghij", 1, 9, "abcdefghijklmnopqrst", 1);
+    test("abcdefghij", 1, 10, "", 9);
+    test("abcdefghij", 1, 10, "abcde", 1);
+    test("abcdefghij", 1, 10, "abcdefghij", 1);
+    test("abcdefghij", 1, 10, "abcdefghijklmnopqrst", 1);
+    test("abcdefghij", 5, 0, "", 0);
+    test("abcdefghij", 5, 0, "abcde", -5);
+    test("abcdefghij", 5, 0, "abcdefghij", -10);
+    test("abcdefghij", 5, 0, "abcdefghijklmnopqrst", -20);
+    test("abcdefghij", 5, 1, "", 1);
+    test("abcdefghij", 5, 1, "abcde", 5);
+    test("abcdefghij", 5, 1, "abcdefghij", 5);
+    test("abcdefghij", 5, 1, "abcdefghijklmnopqrst", 5);
+    test("abcdefghij", 5, 2, "", 2);
+    test("abcdefghij", 5, 2, "abcde", 5);
+    test("abcdefghij", 5, 2, "abcdefghij", 5);
+    test("abcdefghij", 5, 2, "abcdefghijklmnopqrst", 5);
+    test("abcdefghij", 5, 4, "", 4);
+    test("abcdefghij", 5, 4, "abcde", 5);
+    test("abcdefghij", 5, 4, "abcdefghij", 5);
+    test("abcdefghij", 5, 4, "abcdefghijklmnopqrst", 5);
+    test("abcdefghij", 5, 5, "", 5);
+    test("abcdefghij", 5, 5, "abcde", 5);
+    test("abcdefghij", 5, 5, "abcdefghij", 5);
+    test("abcdefghij", 5, 5, "abcdefghijklmnopqrst", 5);
+    test("abcdefghij", 5, 6, "", 5);
+    test("abcdefghij", 5, 6, "abcde", 5);
+    test("abcdefghij", 5, 6, "abcdefghij", 5);
+    test("abcdefghij", 5, 6, "abcdefghijklmnopqrst", 5);
+    test("abcdefghij", 9, 0, "", 0);
+    test("abcdefghij", 9, 0, "abcde", -5);
+    test("abcdefghij", 9, 0, "abcdefghij", -10);
+    test("abcdefghij", 9, 0, "abcdefghijklmnopqrst", -20);
+    test("abcdefghij", 9, 1, "", 1);
+    test("abcdefghij", 9, 1, "abcde", 9);
+    test("abcdefghij", 9, 1, "abcdefghij", 9);
+    test("abcdefghij", 9, 1, "abcdefghijklmnopqrst", 9);
+    test("abcdefghij", 9, 2, "", 1);
+    test("abcdefghij", 9, 2, "abcde", 9);
+    test("abcdefghij", 9, 2, "abcdefghij", 9);
+    test("abcdefghij", 9, 2, "abcdefghijklmnopqrst", 9);
+    test("abcdefghij", 10, 0, "", 0);
+    test("abcdefghij", 10, 0, "abcde", -5);
+    test("abcdefghij", 10, 0, "abcdefghij", -10);
+    test("abcdefghij", 10, 0, "abcdefghijklmnopqrst", -20);
+    test("abcdefghij", 10, 1, "", 0);
+    test("abcdefghij", 10, 1, "abcde", -5);
+    test("abcdefghij", 10, 1, "abcdefghij", -10);
+    test("abcdefghij", 10, 1, "abcdefghijklmnopqrst", -20);
+    test("abcdefghij", 11, 0, "", 0);
+    test("abcdefghij", 11, 0, "abcde", 0);
+    test("abcdefghij", 11, 0, "abcdefghij", 0);
+    test("abcdefghij", 11, 0, "abcdefghijklmnopqrst", 0);
+}
+
+void test2()
+{
+    test("abcdefghijklmnopqrst", 0, 0, "", 0);
+    test("abcdefghijklmnopqrst", 0, 0, "abcde", -5);
+    test("abcdefghijklmnopqrst", 0, 0, "abcdefghij", -10);
+    test("abcdefghijklmnopqrst", 0, 0, "abcdefghijklmnopqrst", -20);
+    test("abcdefghijklmnopqrst", 0, 1, "", 1);
+    test("abcdefghijklmnopqrst", 0, 1, "abcde", -4);
+    test("abcdefghijklmnopqrst", 0, 1, "abcdefghij", -9);
+    test("abcdefghijklmnopqrst", 0, 1, "abcdefghijklmnopqrst", -19);
+    test("abcdefghijklmnopqrst", 0, 10, "", 10);
+    test("abcdefghijklmnopqrst", 0, 10, "abcde", 5);
+    test("abcdefghijklmnopqrst", 0, 10, "abcdefghij", 0);
+    test("abcdefghijklmnopqrst", 0, 10, "abcdefghijklmnopqrst", -10);
+    test("abcdefghijklmnopqrst", 0, 19, "", 19);
+    test("abcdefghijklmnopqrst", 0, 19, "abcde", 14);
+    test("abcdefghijklmnopqrst", 0, 19, "abcdefghij", 9);
+    test("abcdefghijklmnopqrst", 0, 19, "abcdefghijklmnopqrst", -1);
+    test("abcdefghijklmnopqrst", 0, 20, "", 20);
+    test("abcdefghijklmnopqrst", 0, 20, "abcde", 15);
+    test("abcdefghijklmnopqrst", 0, 20, "abcdefghij", 10);
+    test("abcdefghijklmnopqrst", 0, 20, "abcdefghijklmnopqrst", 0);
+    test("abcdefghijklmnopqrst", 0, 21, "", 20);
+    test("abcdefghijklmnopqrst", 0, 21, "abcde", 15);
+    test("abcdefghijklmnopqrst", 0, 21, "abcdefghij", 10);
+    test("abcdefghijklmnopqrst", 0, 21, "abcdefghijklmnopqrst", 0);
+    test("abcdefghijklmnopqrst", 1, 0, "", 0);
+    test("abcdefghijklmnopqrst", 1, 0, "abcde", -5);
+    test("abcdefghijklmnopqrst", 1, 0, "abcdefghij", -10);
+    test("abcdefghijklmnopqrst", 1, 0, "abcdefghijklmnopqrst", -20);
+    test("abcdefghijklmnopqrst", 1, 1, "", 1);
+    test("abcdefghijklmnopqrst", 1, 1, "abcde", 1);
+    test("abcdefghijklmnopqrst", 1, 1, "abcdefghij", 1);
+    test("abcdefghijklmnopqrst", 1, 1, "abcdefghijklmnopqrst", 1);
+    test("abcdefghijklmnopqrst", 1, 9, "", 9);
+    test("abcdefghijklmnopqrst", 1, 9, "abcde", 1);
+    test("abcdefghijklmnopqrst", 1, 9, "abcdefghij", 1);
+    test("abcdefghijklmnopqrst", 1, 9, "abcdefghijklmnopqrst", 1);
+    test("abcdefghijklmnopqrst", 1, 18, "", 18);
+    test("abcdefghijklmnopqrst", 1, 18, "abcde", 1);
+    test("abcdefghijklmnopqrst", 1, 18, "abcdefghij", 1);
+    test("abcdefghijklmnopqrst", 1, 18, "abcdefghijklmnopqrst", 1);
+    test("abcdefghijklmnopqrst", 1, 19, "", 19);
+    test("abcdefghijklmnopqrst", 1, 19, "abcde", 1);
+    test("abcdefghijklmnopqrst", 1, 19, "abcdefghij", 1);
+    test("abcdefghijklmnopqrst", 1, 19, "abcdefghijklmnopqrst", 1);
+    test("abcdefghijklmnopqrst", 1, 20, "", 19);
+    test("abcdefghijklmnopqrst", 1, 20, "abcde", 1);
+    test("abcdefghijklmnopqrst", 1, 20, "abcdefghij", 1);
+    test("abcdefghijklmnopqrst", 1, 20, "abcdefghijklmnopqrst", 1);
+    test("abcdefghijklmnopqrst", 10, 0, "", 0);
+    test("abcdefghijklmnopqrst", 10, 0, "abcde", -5);
+    test("abcdefghijklmnopqrst", 10, 0, "abcdefghij", -10);
+    test("abcdefghijklmnopqrst", 10, 0, "abcdefghijklmnopqrst", -20);
+    test("abcdefghijklmnopqrst", 10, 1, "", 1);
+    test("abcdefghijklmnopqrst", 10, 1, "abcde", 10);
+    test("abcdefghijklmnopqrst", 10, 1, "abcdefghij", 10);
+    test("abcdefghijklmnopqrst", 10, 1, "abcdefghijklmnopqrst", 10);
+    test("abcdefghijklmnopqrst", 10, 5, "", 5);
+    test("abcdefghijklmnopqrst", 10, 5, "abcde", 10);
+    test("abcdefghijklmnopqrst", 10, 5, "abcdefghij", 10);
+    test("abcdefghijklmnopqrst", 10, 5, "abcdefghijklmnopqrst", 10);
+    test("abcdefghijklmnopqrst", 10, 9, "", 9);
+    test("abcdefghijklmnopqrst", 10, 9, "abcde", 10);
+    test("abcdefghijklmnopqrst", 10, 9, "abcdefghij", 10);
+    test("abcdefghijklmnopqrst", 10, 9, "abcdefghijklmnopqrst", 10);
+    test("abcdefghijklmnopqrst", 10, 10, "", 10);
+    test("abcdefghijklmnopqrst", 10, 10, "abcde", 10);
+    test("abcdefghijklmnopqrst", 10, 10, "abcdefghij", 10);
+    test("abcdefghijklmnopqrst", 10, 10, "abcdefghijklmnopqrst", 10);
+    test("abcdefghijklmnopqrst", 10, 11, "", 10);
+    test("abcdefghijklmnopqrst", 10, 11, "abcde", 10);
+    test("abcdefghijklmnopqrst", 10, 11, "abcdefghij", 10);
+    test("abcdefghijklmnopqrst", 10, 11, "abcdefghijklmnopqrst", 10);
+    test("abcdefghijklmnopqrst", 19, 0, "", 0);
+    test("abcdefghijklmnopqrst", 19, 0, "abcde", -5);
+    test("abcdefghijklmnopqrst", 19, 0, "abcdefghij", -10);
+    test("abcdefghijklmnopqrst", 19, 0, "abcdefghijklmnopqrst", -20);
+    test("abcdefghijklmnopqrst", 19, 1, "", 1);
+    test("abcdefghijklmnopqrst", 19, 1, "abcde", 19);
+    test("abcdefghijklmnopqrst", 19, 1, "abcdefghij", 19);
+    test("abcdefghijklmnopqrst", 19, 1, "abcdefghijklmnopqrst", 19);
+    test("abcdefghijklmnopqrst", 19, 2, "", 1);
+    test("abcdefghijklmnopqrst", 19, 2, "abcde", 19);
+    test("abcdefghijklmnopqrst", 19, 2, "abcdefghij", 19);
+    test("abcdefghijklmnopqrst", 19, 2, "abcdefghijklmnopqrst", 19);
+    test("abcdefghijklmnopqrst", 20, 0, "", 0);
+    test("abcdefghijklmnopqrst", 20, 0, "abcde", -5);
+    test("abcdefghijklmnopqrst", 20, 0, "abcdefghij", -10);
+    test("abcdefghijklmnopqrst", 20, 0, "abcdefghijklmnopqrst", -20);
+    test("abcdefghijklmnopqrst", 20, 1, "", 0);
+    test("abcdefghijklmnopqrst", 20, 1, "abcde", -5);
+    test("abcdefghijklmnopqrst", 20, 1, "abcdefghij", -10);
+    test("abcdefghijklmnopqrst", 20, 1, "abcdefghijklmnopqrst", -20);
+    test("abcdefghijklmnopqrst", 21, 0, "", 0);
+    test("abcdefghijklmnopqrst", 21, 0, "abcde", 0);
+    test("abcdefghijklmnopqrst", 21, 0, "abcdefghij", 0);
+    test("abcdefghijklmnopqrst", 21, 0, "abcdefghijklmnopqrst", 0);
+}
+
+
+int main(int, char**) {
+    test0();
+    test1();
+    test2();
+
+    {
+    test("abcde", 5, 1, "", 0);
+    test("abcde", 2, 4, "", 3);
+    test("abcde", 2, 4, "abcde", 2);
+    test("ABCde", 2, 4, "abcde", -1);
+    }
+
+    {
+    test(L"abcde", 5, 1, L"", 0);
+    test(L"abcde", 2, 4, L"", 3);
+    test(L"abcde", 2, 4, L"abcde", 2);
+    test(L"ABCde", 2, 4, L"abcde", -1);
+    }
+
+#if TEST_STD_VER >= 11
+    {
+    test(u"abcde", 5, 1, u"", 0);
+    test(u"abcde", 2, 4, u"", 3);
+    test(u"abcde", 2, 4, u"abcde", 2);
+    test(u"ABCde", 2, 4, u"abcde", -1);
+    }
+
+    {
+    test(U"abcde", 5, 1, U"", 0);
+    test(U"abcde", 2, 4, U"", 3);
+    test(U"abcde", 2, 4, U"abcde", 2);
+    test(U"ABCde", 2, 4, U"abcde", -1);
+    }
+#endif
+
+#if TEST_STD_VER > 11
+    {
+    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
+    constexpr SV  sv1 { "abcde", 5 };
+    constexpr SV  sv2 { "abcde", 0 };
+    static_assert ( sv1.compare(5, 1, sv2) == 0, "" );
+    static_assert ( sv1.compare(2, 4, sv2) > 0, "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.ops/compare.sv.pass.cpp

@@ -0,0 +1,125 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// constexpr int compare(basic_string_view str) const noexcept;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+
+int sign ( int x ) { return x > 0 ? 1 : ( x < 0 ? -1 : 0 ); }
+
+template<typename CharT>
+void test1 ( std::basic_string_view<CharT> sv1,
+            std::basic_string_view<CharT> sv2, int expected ) {
+    assert ( sign( sv1.compare(sv2)) == sign(expected));
+}
+
+
+template<typename CharT>
+void test ( const CharT *s1, const CharT  *s2, int expected ) {
+    typedef std::basic_string_view<CharT> string_view_t;
+
+    string_view_t sv1 ( s1 );
+    string_view_t sv2 ( s2 );
+    test1(sv1, sv2, expected);
+}
+
+int main(int, char**) {
+
+    test("",                     "", 0);
+    test("",                     "abcde", -5);
+    test("",                     "abcdefghij", -10);
+    test("",                     "abcdefghijklmnopqrst", -20);
+    test("abcde",                "", 5);
+    test("abcde",                "abcde", 0);
+    test("abcde",                "abcdefghij", -5);
+    test("abcde",                "abcdefghijklmnopqrst", -15);
+    test("abcdefghij",           "", 10);
+    test("abcdefghij",           "abcde", 5);
+    test("abcdefghij",           "abcdefghij", 0);
+    test("abcdefghij",           "abcdefghijklmnopqrst", -10);
+    test("abcdefghijklmnopqrst", "", 20);
+    test("abcdefghijklmnopqrst", "abcde", 15);
+    test("abcdefghijklmnopqrst", "abcdefghij", 10);
+    test("abcdefghijklmnopqrst", "abcdefghijklmnopqrst", 0);
+
+    test(L"",                     L"", 0);
+    test(L"",                     L"abcde", -5);
+    test(L"",                     L"abcdefghij", -10);
+    test(L"",                     L"abcdefghijklmnopqrst", -20);
+    test(L"abcde",                L"", 5);
+    test(L"abcde",                L"abcde", 0);
+    test(L"abcde",                L"abcdefghij", -5);
+    test(L"abcde",                L"abcdefghijklmnopqrst", -15);
+    test(L"abcdefghij",           L"", 10);
+    test(L"abcdefghij",           L"abcde", 5);
+    test(L"abcdefghij",           L"abcdefghij", 0);
+    test(L"abcdefghij",           L"abcdefghijklmnopqrst", -10);
+    test(L"abcdefghijklmnopqrst", L"", 20);
+    test(L"abcdefghijklmnopqrst", L"abcde", 15);
+    test(L"abcdefghijklmnopqrst", L"abcdefghij", 10);
+    test(L"abcdefghijklmnopqrst", L"abcdefghijklmnopqrst", 0);
+
+#if TEST_STD_VER >= 11
+    test(u"",                     u"", 0);
+    test(u"",                     u"abcde", -5);
+    test(u"",                     u"abcdefghij", -10);
+    test(u"",                     u"abcdefghijklmnopqrst", -20);
+    test(u"abcde",                u"", 5);
+    test(u"abcde",                u"abcde", 0);
+    test(u"abcde",                u"abcdefghij", -5);
+    test(u"abcde",                u"abcdefghijklmnopqrst", -15);
+    test(u"abcdefghij",           u"", 10);
+    test(u"abcdefghij",           u"abcde", 5);
+    test(u"abcdefghij",           u"abcdefghij", 0);
+    test(u"abcdefghij",           u"abcdefghijklmnopqrst", -10);
+    test(u"abcdefghijklmnopqrst", u"", 20);
+    test(u"abcdefghijklmnopqrst", u"abcde", 15);
+    test(u"abcdefghijklmnopqrst", u"abcdefghij", 10);
+    test(u"abcdefghijklmnopqrst", u"abcdefghijklmnopqrst", 0);
+
+    test(U"",                     U"", 0);
+    test(U"",                     U"abcde", -5);
+    test(U"",                     U"abcdefghij", -10);
+    test(U"",                     U"abcdefghijklmnopqrst", -20);
+    test(U"abcde",                U"", 5);
+    test(U"abcde",                U"abcde", 0);
+    test(U"abcde",                U"abcdefghij", -5);
+    test(U"abcde",                U"abcdefghijklmnopqrst", -15);
+    test(U"abcdefghij",           U"", 10);
+    test(U"abcdefghij",           U"abcde", 5);
+    test(U"abcdefghij",           U"abcdefghij", 0);
+    test(U"abcdefghij",           U"abcdefghijklmnopqrst", -10);
+    test(U"abcdefghijklmnopqrst", U"", 20);
+    test(U"abcdefghijklmnopqrst", U"abcde", 15);
+    test(U"abcdefghijklmnopqrst", U"abcdefghij", 10);
+    test(U"abcdefghijklmnopqrst", U"abcdefghijklmnopqrst", 0);
+#endif
+
+#if TEST_STD_VER > 11
+    {
+    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
+    constexpr SV  sv1 { "abcde", 5 };
+    constexpr SV  sv2 { "abcde", 5 };
+    constexpr SV  sv3 { "edcba0", 6 };
+    static_assert ( sv1.compare(sv2) == 0, "" );
+    static_assert ( sv2.compare(sv1) == 0, "" );
+    static_assert ( sv3.compare(sv2)  > 0, "" );
+    static_assert ( sv2.compare(sv3)  < 0, "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.ops/copy.pass.cpp

@@ -0,0 +1,131 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// size_type copy(charT* s, size_type n, size_type pos = 0) const;
+
+// Throws: out_of_range if pos > size().
+// Remarks: Let rlen be the smaller of n and size() - pos.
+// Requires: [s, s+rlen) is a valid range.
+// Effects: Equivalent to std::copy_n(begin() + pos, rlen, s).
+// Returns: rlen.
+
+#include <string_view>
+#include <algorithm>
+#include <cassert>
+#include <stdexcept>
+
+#include "test_macros.h"
+
+template<typename CharT>
+void test1 ( std::basic_string_view<CharT> sv, size_t n, size_t pos ) {
+    const size_t rlen = std::min ( n, sv.size() - pos );
+
+    CharT *dest1 = new CharT [rlen + 1];    dest1[rlen] = 0;
+    CharT *dest2 = new CharT [rlen + 1];    dest2[rlen] = 0;
+
+    if (pos > sv.size()) {
+#ifndef TEST_HAS_NO_EXCEPTIONS
+        try {
+            sv.copy(dest1, n, pos);
+            assert(false);
+        } catch (const std::out_of_range&) {
+        } catch (...) {
+            assert(false);
+        }
+#endif
+    } else {
+        sv.copy(dest1, n, pos);
+        std::copy_n(sv.begin() + pos, rlen, dest2);
+        for ( size_t i = 0; i <= rlen; ++i )
+            assert ( dest1[i] == dest2[i] );
+    }
+    delete [] dest1;
+    delete [] dest2;
+}
+
+
+template<typename CharT>
+void test ( const CharT *s ) {
+    typedef std::basic_string_view<CharT> string_view_t;
+
+    string_view_t sv1 ( s );
+
+    test1(sv1,  0, 0);
+    test1(sv1,  1, 0);
+    test1(sv1, 20, 0);
+    test1(sv1, sv1.size(), 0);
+    test1(sv1, 20, string_view_t::npos);
+
+    test1(sv1,   0, 3);
+    test1(sv1,   2, 3);
+    test1(sv1, 100, 3);
+    test1(sv1, 100, string_view_t::npos);
+
+    test1(sv1, sv1.size(), string_view_t::npos);
+
+    test1(sv1, sv1.size() + 1, 0);
+    test1(sv1, sv1.size() + 1, 1);
+    test1(sv1, sv1.size() + 1, string_view_t::npos);
+}
+
+template<typename CharT>
+TEST_CONSTEXPR_CXX20 bool test_constexpr_copy(const CharT *abcde, const CharT *ghijk, const CharT *bcdjk)
+{
+    CharT buf[6] = {};
+    std::basic_string_view<CharT> lval(ghijk); lval.copy(buf, 6);
+    std::basic_string_view<CharT>(abcde).copy(buf, 3, 1);
+    assert(std::basic_string_view<CharT>(buf) == bcdjk);
+    return true;
+}
+
+int main(int, char**) {
+    test ( "ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE" );
+    test ( "ABCDE");
+    test ( "a" );
+    test ( "" );
+
+    test ( L"ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE" );
+    test ( L"ABCDE" );
+    test ( L"a" );
+    test ( L"" );
+
+#if TEST_STD_VER >= 11
+    test ( u"ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE" );
+    test ( u"ABCDE" );
+    test ( u"a" );
+    test ( u"" );
+
+    test ( U"ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE" );
+    test ( U"ABCDE" );
+    test ( U"a" );
+    test ( U"" );
+#endif
+
+    test_constexpr_copy("ABCDE", "GHIJK", "BCDJK");
+    test_constexpr_copy(L"ABCDE", L"GHIJK", L"BCDJK");
+#if TEST_STD_VER >= 11
+    test_constexpr_copy(u"ABCDE", u"GHIJK", u"BCDJK");
+    test_constexpr_copy(U"ABCDE", U"GHIJK", U"BCDJK");
+#endif
+#if TEST_STD_VER >= 17
+    test_constexpr_copy(u8"ABCDE", u8"GHIJK", u8"BCDJK");
+#endif
+#if TEST_STD_VER >= 20
+    static_assert(test_constexpr_copy("ABCDE", "GHIJK", "BCDJK"));
+    static_assert(test_constexpr_copy(L"ABCDE", L"GHIJK", L"BCDJK"));
+    static_assert(test_constexpr_copy(u"ABCDE", u"GHIJK", u"BCDJK"));
+    static_assert(test_constexpr_copy(U"ABCDE", U"GHIJK", U"BCDJK"));
+    static_assert(test_constexpr_copy(u8"ABCDE", u8"GHIJK", u8"BCDJK"));
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.ops/substr.pass.cpp

@@ -0,0 +1,124 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// constexpr basic_string_view substr(size_type pos = 0, size_type n = npos) const;
+
+// Throws: out_of_range if pos > size().
+// Effects: Determines the effective length rlen of the string to reference as the smaller of n and size() - pos.
+// Returns: basic_string_view(data()+pos, rlen).
+
+#include <string_view>
+#include <algorithm>
+#include <stdexcept>
+#include <cassert>
+
+#include "test_macros.h"
+
+template<typename CharT>
+void test1(std::basic_string_view<CharT> sv, size_t n, size_t pos) {
+    std::basic_string_view<CharT> sv1;
+#ifdef TEST_HAS_NO_EXCEPTIONS
+    if (pos > sv.size())
+        return ;  // would throw if exceptions were enabled
+    sv1 = sv.substr(pos, n);
+#else
+    try {
+        sv1 = sv.substr(pos, n);
+        assert(pos <= sv.size());
+    }
+    catch (const std::out_of_range&) {
+        assert(pos > sv.size());
+        return ;
+    }
+#endif
+    const size_t rlen = std::min(n, sv.size() - pos);
+    assert (sv1.size() == rlen);
+    for (size_t i = 0; i < rlen; ++i)
+        assert(sv[pos+i] == sv1[i]);
+}
+
+
+template<typename CharT>
+void test ( const CharT *s ) {
+    typedef std::basic_string_view<CharT> string_view_t;
+
+    string_view_t sv1 ( s );
+
+    test1(sv1,  0, 0);
+    test1(sv1,  1, 0);
+    test1(sv1, 20, 0);
+    test1(sv1, sv1.size(), 0);
+
+    test1(sv1,   0, 3);
+    test1(sv1,   2, 3);
+    test1(sv1, 100, 3);
+
+    test1(sv1, 0, string_view_t::npos);
+    test1(sv1, 2, string_view_t::npos);
+    test1(sv1, sv1.size(), string_view_t::npos);
+
+    test1(sv1, sv1.size() + 1, 0);
+    test1(sv1, sv1.size() + 1, 1);
+    test1(sv1, sv1.size() + 1, string_view_t::npos);
+}
+
+int main(int, char**) {
+    test ( "ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE" );
+    test ( "ABCDE");
+    test ( "a" );
+    test ( "" );
+
+    test ( L"ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE" );
+    test ( L"ABCDE" );
+    test ( L"a" );
+    test ( L"" );
+
+#if TEST_STD_VER >= 11
+    test ( u"ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE" );
+    test ( u"ABCDE" );
+    test ( u"a" );
+    test ( u"" );
+
+    test ( U"ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE" );
+    test ( U"ABCDE" );
+    test ( U"a" );
+    test ( U"" );
+#endif
+
+#if TEST_STD_VER > 11
+    {
+    constexpr std::string_view sv1 { "ABCDE", 5 };
+
+    {
+    constexpr std::string_view sv2 = sv1.substr ( 0, 3 );
+    static_assert ( sv2.size() == 3, "" );
+    static_assert ( sv2[0] == 'A', "" );
+    static_assert ( sv2[1] == 'B', "" );
+    static_assert ( sv2[2] == 'C', "" );
+    }
+
+    {
+    constexpr std::string_view sv2 = sv1.substr ( 3, 0 );
+    static_assert ( sv2.size() == 0, "" );
+    }
+
+    {
+    constexpr std::string_view sv2 = sv1.substr ( 3, 3 );
+    static_assert ( sv2.size() == 2, "" );
+    static_assert ( sv2[0] == 'D', "" );
+    static_assert ( sv2[1] == 'E', "" );
+    }
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.synop/nothing_to_do.pass.cpp

@@ -0,0 +1,13 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include <string_view>
+
+int main(int, char**) {
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.template/contains.char.pass.cpp

@@ -0,0 +1,45 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
+
+// <string_view>
+
+//   constexpr bool contains(charT x) const noexcept;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+
+constexpr bool test()
+{
+    using SV = std::string_view;
+
+    SV sv1 {};
+    SV sv2 {"abcde", 5};
+
+    ASSERT_NOEXCEPT(sv1.contains('e'));
+
+    assert(!sv1.contains('c'));
+    assert(!sv1.contains('e'));
+    assert(!sv1.contains('x'));
+    assert( sv2.contains('c'));
+    assert( sv2.contains('e'));
+    assert(!sv2.contains('x'));
+
+    return true;
+}
+
+int main(int, char**)
+{
+    test();
+    static_assert(test());
+
+    return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.template/contains.ptr.pass.cpp

@@ -0,0 +1,75 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
+
+// <string_view>
+
+//   constexpr bool contains(const CharT *x) const;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+
+constexpr bool test()
+{
+    using SV = std::string_view;
+
+    const char* s = "abcde";
+    SV sv0;
+    SV sv1 {s + 4, 1};
+    SV sv3 {s + 2, 3};
+    SV svNot {"xyz", 3};
+
+    assert( sv0.contains(""));
+    assert(!sv0.contains("e"));
+
+    assert( sv1.contains(""));
+    assert(!sv1.contains("d"));
+    assert( sv1.contains("e"));
+    assert(!sv1.contains("de"));
+    assert(!sv1.contains("cd"));
+    assert(!sv1.contains("cde"));
+    assert(!sv1.contains("bcde"));
+    assert(!sv1.contains("abcde"));
+    assert(!sv1.contains("xyz"));
+
+    assert( sv3.contains(""));
+    assert( sv3.contains("d"));
+    assert( sv3.contains("e"));
+    assert( sv3.contains("de"));
+    assert( sv3.contains("cd"));
+    assert(!sv3.contains("ce"));
+    assert( sv3.contains("cde"));
+    assert(!sv3.contains("edc"));
+    assert(!sv3.contains("bcde"));
+    assert(!sv3.contains("abcde"));
+    assert(!sv3.contains("xyz"));
+
+    assert( svNot.contains(""));
+    assert(!svNot.contains("d"));
+    assert(!svNot.contains("e"));
+    assert(!svNot.contains("de"));
+    assert(!svNot.contains("cd"));
+    assert(!svNot.contains("cde"));
+    assert(!svNot.contains("bcde"));
+    assert(!svNot.contains("abcde"));
+    assert( svNot.contains("xyz"));
+    assert(!svNot.contains("zyx"));
+
+    return true;
+}
+
+int main(int, char**)
+{
+    test();
+    static_assert(test());
+
+    return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.template/contains.string_view.pass.cpp

@@ -0,0 +1,89 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
+
+// <string_view>
+
+//   constexpr bool contains(string_view x) const noexcept;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+
+constexpr bool test()
+{
+    using SV = std::string_view;
+
+    const char* s = "abcde";
+    SV sv0;
+    SV sv1 {s + 1, 1};
+    SV sv2 {s + 1, 2};
+    SV sv3 {s + 1, 3};
+    SV sv4 {s + 1, 4};
+    SV sv5 {s    , 5};
+    SV svNot  {"xyz", 3};
+    SV svNot2 {"bd" , 2};
+    SV svNot3 {"dcb", 3};
+
+    ASSERT_NOEXCEPT(sv0.contains(sv0));
+
+    assert( sv0.contains(sv0));
+    assert(!sv0.contains(sv1));
+
+    assert( sv1.contains(sv0));
+    assert( sv1.contains(sv1));
+    assert(!sv1.contains(sv2));
+    assert(!sv1.contains(sv3));
+    assert(!sv1.contains(sv4));
+    assert(!sv1.contains(sv5));
+    assert(!sv1.contains(svNot));
+    assert(!sv1.contains(svNot2));
+    assert(!sv1.contains(svNot3));
+
+    assert( sv3.contains(sv0));
+    assert( sv3.contains(sv1));
+    assert( sv3.contains(sv2));
+    assert( sv3.contains(sv3));
+    assert(!sv3.contains(sv4));
+    assert(!sv3.contains(sv5));
+    assert(!sv3.contains(svNot));
+    assert(!sv3.contains(svNot2));
+    assert(!sv3.contains(svNot3));
+
+    assert( sv5.contains(sv0));
+    assert( sv5.contains(sv1));
+    assert( sv5.contains(sv2));
+    assert( sv5.contains(sv3));
+    assert( sv5.contains(sv4));
+    assert( sv5.contains(sv5));
+    assert(!sv5.contains(svNot));
+    assert(!sv5.contains(svNot2));
+    assert(!sv5.contains(svNot3));
+
+    assert( svNot.contains(sv0));
+    assert(!svNot.contains(sv1));
+    assert(!svNot.contains(sv2));
+    assert(!svNot.contains(sv3));
+    assert(!svNot.contains(sv4));
+    assert(!svNot.contains(sv5));
+    assert( svNot.contains(svNot));
+    assert(!svNot.contains(svNot2));
+    assert(!svNot.contains(svNot3));
+
+    return true;
+}
+
+int main(int, char**)
+{
+    test();
+    static_assert(test());
+
+    return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.template/ends_with.char.pass.cpp

@@ -0,0 +1,49 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+
+// <string_view>
+
+//   constexpr bool ends_with(charT x) const noexcept;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+
+int main(int, char**)
+{
+    {
+    typedef std::string_view SV;
+    SV  sv1 {};
+    SV  sv2 { "abcde", 5 };
+
+    ASSERT_NOEXCEPT(sv1.ends_with('e'));
+
+    assert (!sv1.ends_with('e'));
+    assert (!sv1.ends_with('x'));
+    assert ( sv2.ends_with('e'));
+    assert (!sv2.ends_with('x'));
+    }
+
+#if TEST_STD_VER > 11
+    {
+    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
+    constexpr SV  sv1 {};
+    constexpr SV  sv2 { "abcde", 5 };
+    static_assert (!sv1.ends_with('e'), "" );
+    static_assert (!sv1.ends_with('x'), "" );
+    static_assert ( sv2.ends_with('e'), "" );
+    static_assert (!sv2.ends_with('x'), "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.template/ends_with.ptr.pass.cpp

@@ -0,0 +1,100 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+
+// <string_view>
+
+//   constexpr bool ends_with(const CharT *x) const;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+
+int main(int, char**)
+{
+    {
+    typedef std::string_view SV;
+    const char *s = "abcde";
+    SV  sv0 {};
+    SV  sv1 { s + 4, 1 };
+    SV  sv2 { s + 3, 2 };
+    SV  svNot {"def", 3 };
+
+    LIBCPP_ASSERT_NOEXCEPT(sv0.ends_with(""));
+
+    assert ( sv0.ends_with(""));
+    assert (!sv0.ends_with("e"));
+
+    assert ( sv1.ends_with(""));
+    assert ( sv1.ends_with("e"));
+    assert (!sv1.ends_with("de"));
+    assert (!sv1.ends_with("cde"));
+    assert (!sv1.ends_with("bcde"));
+    assert (!sv1.ends_with("abcde"));
+    assert (!sv1.ends_with("def"));
+
+    assert ( sv2.ends_with(""));
+    assert ( sv2.ends_with("e"));
+    assert ( sv2.ends_with("de"));
+    assert (!sv2.ends_with("cde"));
+    assert (!sv2.ends_with("bcde"));
+    assert (!sv2.ends_with("abcde"));
+    assert (!sv2.ends_with("def"));
+
+    assert ( svNot.ends_with(""));
+    assert (!svNot.ends_with("e"));
+    assert (!svNot.ends_with("de"));
+    assert (!svNot.ends_with("cde"));
+    assert (!svNot.ends_with("bcde"));
+    assert (!svNot.ends_with("abcde"));
+    assert ( svNot.ends_with("def"));
+    }
+
+#if TEST_STD_VER > 11
+    {
+    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
+    constexpr const char *s = "abcde";
+    constexpr SV  sv0 {};
+    constexpr SV  sv1 { s + 4, 1 };
+    constexpr SV  sv2 { s + 3, 2 };
+    constexpr SV  svNot {"def", 3 };
+
+    static_assert ( sv0.ends_with(""), "" );
+    static_assert (!sv0.ends_with("e"), "" );
+
+    static_assert ( sv1.ends_with(""), "" );
+    static_assert ( sv1.ends_with("e"), "" );
+    static_assert (!sv1.ends_with("de"), "" );
+    static_assert (!sv1.ends_with("cde"), "" );
+    static_assert (!sv1.ends_with("bcde"), "" );
+    static_assert (!sv1.ends_with("abcde"), "" );
+    static_assert (!sv1.ends_with("def"), "" );
+
+    static_assert ( sv2.ends_with(""), "" );
+    static_assert ( sv2.ends_with("e"), "" );
+    static_assert ( sv2.ends_with("de"), "" );
+    static_assert (!sv2.ends_with("cde"), "" );
+    static_assert (!sv2.ends_with("bcde"), "" );
+    static_assert (!sv2.ends_with("abcde"), "" );
+    static_assert (!sv2.ends_with("def"), "" );
+
+    static_assert ( svNot.ends_with(""), "" );
+    static_assert (!svNot.ends_with("e"), "" );
+    static_assert (!svNot.ends_with("de"), "" );
+    static_assert (!svNot.ends_with("cde"), "" );
+    static_assert (!svNot.ends_with("bcde"), "" );
+    static_assert (!svNot.ends_with("abcde"), "" );
+    static_assert ( svNot.ends_with("def"), "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.template/ends_with.string_view.pass.cpp

@@ -0,0 +1,106 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+
+// <string_view>
+
+//   constexpr bool ends_with(string_view x) const noexcept;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+
+int main(int, char**)
+{
+    {
+    typedef std::string_view SV;
+    const char *s = "abcde";
+    SV  sv0;
+    SV  sv1 { s + 4, 1 };
+    SV  sv2 { s + 3, 2 };
+    SV  sv3 { s + 2, 3 };
+    SV  sv4 { s + 1, 4 };
+    SV  sv5 { s    , 5 };
+    SV  svNot {"def", 3 };
+
+    ASSERT_NOEXCEPT(sv0.ends_with(sv0));
+
+    assert ( sv0.ends_with(sv0));
+    assert (!sv0.ends_with(sv1));
+
+    assert ( sv1.ends_with(sv0));
+    assert ( sv1.ends_with(sv1));
+    assert (!sv1.ends_with(sv2));
+    assert (!sv1.ends_with(sv3));
+    assert (!sv1.ends_with(sv4));
+    assert (!sv1.ends_with(sv5));
+    assert (!sv1.ends_with(svNot));
+
+    assert ( sv2.ends_with(sv0));
+    assert ( sv2.ends_with(sv1));
+    assert ( sv2.ends_with(sv2));
+    assert (!sv2.ends_with(sv3));
+    assert (!sv2.ends_with(sv4));
+    assert (!sv2.ends_with(sv5));
+    assert (!sv2.ends_with(svNot));
+
+    assert ( svNot.ends_with(sv0));
+    assert (!svNot.ends_with(sv1));
+    assert (!svNot.ends_with(sv2));
+    assert (!svNot.ends_with(sv3));
+    assert (!svNot.ends_with(sv4));
+    assert (!svNot.ends_with(sv5));
+    assert ( svNot.ends_with(svNot));
+    }
+
+#if TEST_STD_VER > 11
+    {
+    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
+    constexpr const char *s = "abcde";
+    constexpr SV  sv0 {};
+    constexpr SV  sv1 { s + 4, 1 };
+    constexpr SV  sv2 { s + 3, 2 };
+    constexpr SV  sv3 { s + 2, 3 };
+    constexpr SV  sv4 { s + 1, 4 };
+    constexpr SV  sv5 { s,     5 };
+    constexpr SV  svNot {"def", 3 };
+
+    static_assert ( sv0.ends_with(sv0), "" );
+    static_assert (!sv0.ends_with(sv1), "" );
+
+    static_assert ( sv1.ends_with(sv0), "" );
+    static_assert ( sv1.ends_with(sv1), "" );
+    static_assert (!sv1.ends_with(sv2), "" );
+    static_assert (!sv1.ends_with(sv3), "" );
+    static_assert (!sv1.ends_with(sv4), "" );
+    static_assert (!sv1.ends_with(sv5), "" );
+    static_assert (!sv1.ends_with(svNot), "" );
+
+    static_assert ( sv2.ends_with(sv0), "" );
+    static_assert ( sv2.ends_with(sv1), "" );
+    static_assert ( sv2.ends_with(sv2), "" );
+    static_assert (!sv2.ends_with(sv3), "" );
+    static_assert (!sv2.ends_with(sv4), "" );
+    static_assert (!sv2.ends_with(sv5), "" );
+    static_assert (!sv2.ends_with(svNot), "" );
+
+    static_assert ( svNot.ends_with(sv0), "" );
+    static_assert (!svNot.ends_with(sv1), "" );
+    static_assert (!svNot.ends_with(sv2), "" );
+    static_assert (!svNot.ends_with(sv3), "" );
+    static_assert (!svNot.ends_with(sv4), "" );
+    static_assert (!svNot.ends_with(sv5), "" );
+    static_assert ( svNot.ends_with(svNot), "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.template/starts_with.char.pass.cpp

@@ -0,0 +1,49 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+
+// <string_view>
+
+//   constexpr bool starts_with(charT x) const noexcept;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+
+int main(int, char**)
+{
+    {
+    typedef std::string_view SV;
+    SV  sv1 {};
+    SV  sv2 { "abcde", 5 };
+
+    ASSERT_NOEXCEPT(sv1.starts_with('e'));
+
+    assert (!sv1.starts_with('a'));
+    assert (!sv1.starts_with('x'));
+    assert ( sv2.starts_with('a'));
+    assert (!sv2.starts_with('x'));
+    }
+
+#if TEST_STD_VER > 11
+    {
+    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
+    constexpr SV  sv1 {};
+    constexpr SV  sv2 { "abcde", 5 };
+    static_assert (!sv1.starts_with('a'), "" );
+    static_assert (!sv1.starts_with('x'), "" );
+    static_assert ( sv2.starts_with('a'), "" );
+    static_assert (!sv2.starts_with('x'), "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.template/starts_with.ptr.pass.cpp

@@ -0,0 +1,100 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+
+// <string_view>
+
+//   constexpr bool starts_with(string_view x) const noexcept;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+
+int main(int, char**)
+{
+    {
+    typedef std::string_view SV;
+    const char *s = "abcde";
+    SV  sv0 {};
+    SV  sv1 { s, 1 };
+    SV  sv2 { s, 2 };
+    SV  svNot {"def", 3 };
+
+    LIBCPP_ASSERT_NOEXCEPT(sv0.starts_with(""));
+
+    assert ( sv0.starts_with(""));
+    assert (!sv0.starts_with("a"));
+
+    assert ( sv1.starts_with(""));
+    assert ( sv1.starts_with("a"));
+    assert (!sv1.starts_with("ab"));
+    assert (!sv1.starts_with("abc"));
+    assert (!sv1.starts_with("abcd"));
+    assert (!sv1.starts_with("abcde"));
+    assert (!sv1.starts_with("def"));
+
+    assert ( sv2.starts_with(s + 5));
+    assert ( sv2.starts_with("a"));
+    assert ( sv2.starts_with("ab"));
+    assert (!sv2.starts_with("abc"));
+    assert (!sv2.starts_with("abcd"));
+    assert (!sv2.starts_with("abcde"));
+    assert (!sv2.starts_with("def"));
+
+    assert ( svNot.starts_with(""));
+    assert (!svNot.starts_with("a"));
+    assert (!svNot.starts_with("ab"));
+    assert (!svNot.starts_with("abc"));
+    assert (!svNot.starts_with("abcd"));
+    assert (!svNot.starts_with("abcde"));
+    assert ( svNot.starts_with("def"));
+    }
+
+#if TEST_STD_VER > 11
+    {
+    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
+    constexpr const char *s = "abcde";
+    constexpr SV  sv0 {};
+    constexpr SV  sv1 { s, 1 };
+    constexpr SV  sv2 { s, 2 };
+    constexpr SV  svNot {"def", 3 };
+
+    static_assert ( sv0.starts_with(""), "" );
+    static_assert (!sv0.starts_with("a"), "" );
+
+    static_assert ( sv1.starts_with(""), "" );
+    static_assert ( sv1.starts_with("a"), "" );
+    static_assert (!sv1.starts_with("ab"), "" );
+    static_assert (!sv1.starts_with("abc"), "" );
+    static_assert (!sv1.starts_with("abcd"), "" );
+    static_assert (!sv1.starts_with("abcde"), "" );
+    static_assert (!sv1.starts_with("def"), "" );
+
+    static_assert ( sv2.starts_with(s + 5), "" );
+    static_assert ( sv2.starts_with("a"), "" );
+    static_assert ( sv2.starts_with("ab"), "" );
+    static_assert (!sv2.starts_with("abc"), "" );
+    static_assert (!sv2.starts_with("abcd"), "" );
+    static_assert (!sv2.starts_with("abcde"), "" );
+    static_assert (!sv2.starts_with("def"), "" );
+
+    static_assert ( svNot.starts_with(""), "" );
+    static_assert (!svNot.starts_with("a"), "" );
+    static_assert (!svNot.starts_with("ab"), "" );
+    static_assert (!svNot.starts_with("abc"), "" );
+    static_assert (!svNot.starts_with("abcd"), "" );
+    static_assert (!svNot.starts_with("abcde"), "" );
+    static_assert ( svNot.starts_with("def"), "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string.view.template/starts_with.string_view.pass.cpp

@@ -0,0 +1,106 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+
+// <string_view>
+
+//   constexpr bool starts_with(string_view x) const noexcept;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.h"
+
+int main(int, char**)
+{
+    {
+    typedef std::string_view SV;
+    const char *s = "abcde";
+    SV  sv0 {};
+    SV  sv1 { s, 1 };
+    SV  sv2 { s, 2 };
+    SV  sv3 { s, 3 };
+    SV  sv4 { s, 4 };
+    SV  sv5 { s, 5 };
+    SV  svNot {"def", 3 };
+
+    ASSERT_NOEXCEPT(sv0.starts_with(sv0));
+
+    assert ( sv0.starts_with(sv0));
+    assert (!sv0.starts_with(sv1));
+
+    assert ( sv1.starts_with(sv0));
+    assert ( sv1.starts_with(sv1));
+    assert (!sv1.starts_with(sv2));
+    assert (!sv1.starts_with(sv3));
+    assert (!sv1.starts_with(sv4));
+    assert (!sv1.starts_with(sv5));
+    assert (!sv1.starts_with(svNot));
+
+    assert ( sv2.starts_with(sv0));
+    assert ( sv2.starts_with(sv1));
+    assert ( sv2.starts_with(sv2));
+    assert (!sv2.starts_with(sv3));
+    assert (!sv2.starts_with(sv4));
+    assert (!sv2.starts_with(sv5));
+    assert (!sv2.starts_with(svNot));
+
+    assert ( svNot.starts_with(sv0));
+    assert (!svNot.starts_with(sv1));
+    assert (!svNot.starts_with(sv2));
+    assert (!svNot.starts_with(sv3));
+    assert (!svNot.starts_with(sv4));
+    assert (!svNot.starts_with(sv5));
+    assert ( svNot.starts_with(svNot));
+    }
+
+#if TEST_STD_VER > 11
+    {
+    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
+    constexpr const char *s = "abcde";
+    constexpr SV  sv0 {};
+    constexpr SV  sv1 { s, 1 };
+    constexpr SV  sv2 { s, 2 };
+    constexpr SV  sv3 { s, 3 };
+    constexpr SV  sv4 { s, 4 };
+    constexpr SV  sv5 { s, 5 };
+    constexpr SV  svNot {"def", 3 };
+
+    static_assert ( sv0.starts_with(sv0), "" );
+    static_assert (!sv0.starts_with(sv1), "" );
+
+    static_assert ( sv1.starts_with(sv0), "" );
+    static_assert ( sv1.starts_with(sv1), "" );
+    static_assert (!sv1.starts_with(sv2), "" );
+    static_assert (!sv1.starts_with(sv3), "" );
+    static_assert (!sv1.starts_with(sv4), "" );
+    static_assert (!sv1.starts_with(sv5), "" );
+    static_assert (!sv1.starts_with(svNot), "" );
+
+    static_assert ( sv2.starts_with(sv0), "" );
+    static_assert ( sv2.starts_with(sv1), "" );
+    static_assert ( sv2.starts_with(sv2), "" );
+    static_assert (!sv2.starts_with(sv3), "" );
+    static_assert (!sv2.starts_with(sv4), "" );
+    static_assert (!sv2.starts_with(sv5), "" );
+    static_assert (!sv2.starts_with(svNot), "" );
+
+    static_assert ( svNot.starts_with(sv0), "" );
+    static_assert (!svNot.starts_with(sv1), "" );
+    static_assert (!svNot.starts_with(sv2), "" );
+    static_assert (!svNot.starts_with(sv3), "" );
+    static_assert (!svNot.starts_with(sv4), "" );
+    static_assert (!svNot.starts_with(sv5), "" );
+    static_assert ( svNot.starts_with(svNot), "" );
+    }
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string_view.literals/literal.pass.cpp

@@ -0,0 +1,96 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// Note: libc++ supports string_view before C++17, but literals were introduced in C++14
+// UNSUPPORTED: c++03, c++11
+// UNSUPPORTED: !stdlib=libc++ && c++14
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+
+#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
+    typedef std::u8string_view u8string_view;
+#else
+    typedef std::string_view   u8string_view;
+#endif
+
+int main(int, char**) {
+    {
+        using namespace std::literals::string_view_literals;
+
+        ASSERT_SAME_TYPE(decltype(  "Hi"sv), std::string_view);
+        ASSERT_SAME_TYPE(decltype(u8"Hi"sv), u8string_view);
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+        ASSERT_SAME_TYPE(decltype( L"Hi"sv), std::wstring_view);
+#endif
+        ASSERT_SAME_TYPE(decltype( u"Hi"sv), std::u16string_view);
+        ASSERT_SAME_TYPE(decltype( U"Hi"sv), std::u32string_view);
+
+        std::string_view foo;
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+        std::wstring_view Lfoo;
+#endif
+        u8string_view u8foo;
+        std::u16string_view ufoo;
+        std::u32string_view Ufoo;
+
+        foo  =    ""sv;     assert(  foo.size() == 0);
+        u8foo = u8""sv;     assert(u8foo.size() == 0);
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+        Lfoo  =  L""sv;     assert( Lfoo.size() == 0);
+#endif
+        ufoo  =  u""sv;     assert( ufoo.size() == 0);
+        Ufoo  =  U""sv;     assert( Ufoo.size() == 0);
+
+        foo   =   " "sv;    assert(  foo.size() == 1);
+        u8foo = u8" "sv;    assert(u8foo.size() == 1);
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+        Lfoo  =  L" "sv;    assert( Lfoo.size() == 1);
+#endif
+        ufoo  =  u" "sv;    assert( ufoo.size() == 1);
+        Ufoo  =  U" "sv;    assert( Ufoo.size() == 1);
+
+        foo   =   "ABC"sv;  assert(  foo ==   "ABC");   assert(  foo == std::string_view   (  "ABC"));
+        u8foo = u8"ABC"sv;  assert(u8foo == u8"ABC");   assert(u8foo == u8string_view      (u8"ABC"));
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+        Lfoo  =  L"ABC"sv;  assert( Lfoo ==  L"ABC");   assert( Lfoo == std::wstring_view  ( L"ABC"));
+#endif
+        ufoo  =  u"ABC"sv;  assert( ufoo ==  u"ABC");   assert( ufoo == std::u16string_view( u"ABC"));
+        Ufoo  =  U"ABC"sv;  assert( Ufoo ==  U"ABC");   assert( Ufoo == std::u32string_view( U"ABC"));
+
+        static_assert(  "ABC"sv.size() == 3, "");
+        static_assert(u8"ABC"sv.size() == 3, "");
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+        static_assert( L"ABC"sv.size() == 3, "");
+#endif
+        static_assert( u"ABC"sv.size() == 3, "");
+        static_assert( U"ABC"sv.size() == 3, "");
+
+        ASSERT_NOEXCEPT(  "ABC"sv);
+        ASSERT_NOEXCEPT(u8"ABC"sv);
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+        ASSERT_NOEXCEPT( L"ABC"sv);
+#endif
+        ASSERT_NOEXCEPT( u"ABC"sv);
+        ASSERT_NOEXCEPT( U"ABC"sv);
+    }
+    {
+        using namespace std::literals;
+        std::string_view foo = ""sv;
+        assert(foo.length() == 0);
+    }
+    {
+        using namespace std;
+        std::string_view foo = ""sv;
+        assert(foo.length() == 0);
+    }
+
+    return 0;
+}

module/jni/libcxx/test/std/strings/string.view/string_view.literals/literal.verify.cpp

@@ -0,0 +1,23 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// Note: libc++ supports string_view before C++17, but literals were introduced in C++14
+// UNSUPPORTED: c++03, c++11
+// UNSUPPORTED: !stdlib=libc++ && c++14
+
+#include <string_view>
+
+void f() {
+  {
+    using std::string_view;
+    string_view foo = ""sv; // expected-error {{no matching literal operator}}
+  }
+  {
+    std::string_view foo = ""sv; // expected-error {{no matching literal operator}}
+  }
+}

module/jni/libcxx/test/std/strings/string.view/traits_mismatch.compile.fail.cpp

@@ -0,0 +1,21 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+//   The string_views's value type must be the same as the traits's char_type
+
+#include <string_view>
+
+int main(int, char**)
+{
+    std::basic_string_view<char, std::char_traits<wchar_t>> s;
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/string.view/trivially_copyable.compile.pass.cpp

@@ -0,0 +1,28 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// P2251 was voted into C++23, but is supported even in C++17 mode by all vendors.
+
+// <string_view>
+
+#include <string_view>
+#include <type_traits>
+
+#include "test_macros.h"
+
+static_assert(std::is_trivially_copyable<std::basic_string_view<char> >::value, "");
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+static_assert(std::is_trivially_copyable<std::basic_string_view<wchar_t> >::value, "");
+#endif
+#ifndef TEST_HAS_NO_CHAR8_T
+static_assert(std::is_trivially_copyable<std::basic_string_view<char8_t> >::value, "");
+#endif
+static_assert(std::is_trivially_copyable<std::basic_string_view<char16_t> >::value, "");
+static_assert(std::is_trivially_copyable<std::basic_string_view<char32_t> >::value, "");

module/jni/libcxx/test/std/strings/string.view/types.pass.cpp

@@ -0,0 +1,83 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
+// <string_view>
+
+// Test nested types and default template args:
+
+// template<class charT, class traits = char_traits<charT>>
+// {
+// public:
+//     // types:
+//     using traits_type               = traits;
+//     using value_type                = charT;
+//     using pointer                   = value_type*;
+//     using const_pointer             = const value_type*;
+//     using reference                 = value_type&;
+//     using const_reference           = const value_type&;
+//     using const_iterator            = implementation-defined ; // see 24.4.2.2
+//     using iterator                  = const_iterator;
+//     using const_reverse_iterator    = reverse_iterator<const_iterator>;
+//     using iterator                  = const_reverse_iterator;
+//     using size_type                 = size_t;
+//     using difference_type           = ptrdiff_t;
+//     static constexpr size_type npos = size_type(-1);
+//
+// };
+
+#include <string_view>
+#include <iterator>
+#include <type_traits>
+
+#include "test_macros.h"
+
+template <class Traits>
+void
+test()
+{
+    typedef std::basic_string_view<typename Traits::char_type, Traits> S;
+
+    static_assert((std::is_same<typename S::traits_type,     Traits>::value), "");
+    static_assert((std::is_same<typename S::value_type,      typename Traits::char_type>::value), "");
+    static_assert((std::is_same<typename S::size_type,       std::size_t>::value), "");
+    static_assert((std::is_same<typename S::difference_type, ptrdiff_t>::value), "");
+    static_assert((std::is_same<typename S::reference,             typename S::value_type&>::value), "");
+    static_assert((std::is_same<typename S::const_reference, const typename S::value_type&>::value), "");
+    static_assert((std::is_same<typename S::pointer,               typename S::value_type*>::value), "");
+    static_assert((std::is_same<typename S::const_pointer,   const typename S::value_type*>::value), "");
+    static_assert((std::is_same<
+        typename std::iterator_traits<typename S::iterator>::iterator_category,
+        std::random_access_iterator_tag>::value), "");
+    static_assert((std::is_same<
+        typename std::iterator_traits<typename S::const_iterator>::iterator_category,
+        std::random_access_iterator_tag>::value), "");
+    static_assert((std::is_same<
+        typename S::reverse_iterator,
+        std::reverse_iterator<typename S::iterator> >::value), "");
+    static_assert((std::is_same<
+        typename S::const_reverse_iterator,
+        std::reverse_iterator<typename S::const_iterator> >::value), "");
+    static_assert(S::npos == -1, "");
+    static_assert((std::is_same<typename S::iterator,         typename S::const_iterator>::value), "");
+    static_assert((std::is_same<typename S::reverse_iterator, typename S::const_reverse_iterator>::value), "");
+}
+
+int main(int, char**)
+{
+    test<std::char_traits<char> >();
+    test<std::char_traits<wchar_t> >();
+#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
+    test<std::char_traits<char8_t> >();
+#endif
+    static_assert((std::is_same<std::basic_string_view<char>::traits_type,
+                                std::char_traits<char> >::value), "");
+
+  return 0;
+}