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 size() 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> 20 TEST_CONSTEXPR_CXX20 void 21 test(const S& s, typename S::size_type c) 22 { 23 assert(s.size() == c); 24 } 25 26 template <class S> 27 TEST_CONSTEXPR_CXX20 void test_string() { 28 test(S(), 0); 29 test(S("123"), 3); 30 test(S("12345678901234567890123456789012345678901234567890"), 50); 31 } 32 33 TEST_CONSTEXPR_CXX20 bool test() { 34 test_string<std::string>(); 35 #if TEST_STD_VER >= 11 36 test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char>>>(); 37 #endif 38 39 return true; 40 } 41 42 int main(int, char**) 43 { 44 test(); 45 #if TEST_STD_VER > 17 46 static_assert(test()); 47 #endif 48 49 return 0; 50 } 51