1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 // <string> 10 11 // size_type length() const; // constexpr since C++20 12 13 #include <string> 14 #include <cassert> 15 16 #include "test_macros.h" 17 #include "min_allocator.h" 18 19 template <class S> test(const S & s)20TEST_CONSTEXPR_CXX20 void test(const S& s) { 21 assert(s.length() == s.size()); 22 } 23 24 template <class S> test_string()25TEST_CONSTEXPR_CXX20 void test_string() { 26 test(S()); 27 test(S("123")); 28 test(S("12345678901234567890123456789012345678901234567890")); 29 } 30 test()31TEST_CONSTEXPR_CXX20 bool test() { 32 test_string<std::string>(); 33 #if TEST_STD_VER >= 11 34 test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char>>>(); 35 #endif 36 37 return true; 38 } 39 main(int,char **)40int main(int, char**) { 41 test(); 42 #if TEST_STD_VER > 17 43 static_assert(test()); 44 #endif 45 46 return 0; 47 } 48