Initial commit

module/jni/libcxx/test/std/strings/basic.string/string.nonmembers/string.special/swap.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
+//
+//===----------------------------------------------------------------------===//
+
+// <string>
+
+// template<class charT, class traits, class Allocator>
+//   void swap(basic_string<charT,traits,Allocator>& lhs,
+//             basic_string<charT,traits,Allocator>& rhs); // constexpr since C++20
+
+#include <string>
+#include <stdexcept>
+#include <algorithm>
+#include <cassert>
+
+#include "test_macros.h"
+#include "min_allocator.h"
+
+template <class S>
+TEST_CONSTEXPR_CXX20 void
+test(S s1, S s2)
+{
+    S s1_ = s1;
+    S s2_ = s2;
+    swap(s1, s2);
+    LIBCPP_ASSERT(s1.__invariants());
+    LIBCPP_ASSERT(s2.__invariants());
+    assert(s1 == s2_);
+    assert(s2 == s1_);
+}
+
+TEST_CONSTEXPR_CXX20 bool test() {
+  {
+    typedef std::string S;
+    test(S(""), S(""));
+    test(S(""), S("12345"));
+    test(S(""), S("1234567890"));
+    test(S(""), S("12345678901234567890"));
+    test(S("abcde"), S(""));
+    test(S("abcde"), S("12345"));
+    test(S("abcde"), S("1234567890"));
+    test(S("abcde"), S("12345678901234567890"));
+    test(S("abcdefghij"), S(""));
+    test(S("abcdefghij"), S("12345"));
+    test(S("abcdefghij"), S("1234567890"));
+    test(S("abcdefghij"), S("12345678901234567890"));
+    test(S("abcdefghijklmnopqrst"), S(""));
+    test(S("abcdefghijklmnopqrst"), S("12345"));
+    test(S("abcdefghijklmnopqrst"), S("1234567890"));
+    test(S("abcdefghijklmnopqrst"), S("12345678901234567890"));
+  }
+#if TEST_STD_VER >= 11
+  {
+    typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
+    test(S(""), S(""));
+    test(S(""), S("12345"));
+    test(S(""), S("1234567890"));
+    test(S(""), S("12345678901234567890"));
+    test(S("abcde"), S(""));
+    test(S("abcde"), S("12345"));
+    test(S("abcde"), S("1234567890"));
+    test(S("abcde"), S("12345678901234567890"));
+    test(S("abcdefghij"), S(""));
+    test(S("abcdefghij"), S("12345"));
+    test(S("abcdefghij"), S("1234567890"));
+    test(S("abcdefghij"), S("12345678901234567890"));
+    test(S("abcdefghijklmnopqrst"), S(""));
+    test(S("abcdefghijklmnopqrst"), S("12345"));
+    test(S("abcdefghijklmnopqrst"), S("1234567890"));
+    test(S("abcdefghijklmnopqrst"), S("12345678901234567890"));
+  }
+#endif
+
+  return true;
+}
+
+int main(int, char**)
+{
+  test();
+#if TEST_STD_VER > 17
+  static_assert(test());
+#endif
+
+  return 0;
+}

module/jni/libcxx/test/std/strings/basic.string/string.nonmembers/string.special/swap_noexcept.pass.cpp

@@ -0,0 +1,86 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+
+// <string>
+
+// void swap(basic_string& c)
+//     noexcept(!allocator_type::propagate_on_container_swap::value ||
+//              __is_nothrow_swappable<allocator_type>::value); // constexpr since C++20
+//
+//  In C++17, the standard says that swap shall have:
+//     noexcept(allocator_traits<Allocator>::propagate_on_container_swap::value ||
+//              allocator_traits<Allocator>::is_always_equal::value); // constexpr since C++20
+
+// This tests a conforming extension
+
+#include <string>
+#include <utility>
+#include <cassert>
+
+#include "test_macros.h"
+#include "test_allocator.h"
+
+template <class T>
+struct some_alloc
+{
+    typedef T value_type;
+
+    some_alloc() {}
+    some_alloc(const some_alloc&);
+    T *allocate(size_t);
+    void deallocate(void*, unsigned) {}
+    typedef std::true_type propagate_on_container_swap;
+};
+
+template <class T>
+struct some_alloc2
+{
+    typedef T value_type;
+
+    some_alloc2() {}
+    some_alloc2(const some_alloc2&);
+    T *allocate(size_t);
+    void deallocate(void*, unsigned) {}
+
+    typedef std::false_type propagate_on_container_swap;
+    typedef std::true_type is_always_equal;
+};
+
+int main(int, char**)
+{
+    {
+        typedef std::string C;
+        static_assert(noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
+    }
+#if defined(_LIBCPP_VERSION)
+    {
+        typedef std::basic_string<char, std::char_traits<char>, test_allocator<char>> C;
+        static_assert(noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
+    }
+#endif // _LIBCPP_VERSION
+    {
+        typedef std::basic_string<char, std::char_traits<char>, some_alloc<char>> C;
+#if TEST_STD_VER >= 14
+    //  In C++14, if POCS is set, swapping the allocator is required not to throw
+        static_assert( noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
+#else
+        static_assert(!noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
+#endif
+    }
+#if TEST_STD_VER >= 14
+    {
+        typedef std::basic_string<char, std::char_traits<char>, some_alloc2<char>> C;
+    //  if the allocators are always equal, then the swap can be noexcept
+        static_assert( noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
+    }
+#endif
+
+  return 0;
+}