Initial commit

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;
+}