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 // XFAIL: LIBCXX-AIX-FIXME 10 11 // <string> 12 13 // const charT* c_str() const; // constexpr since C++20 14 15 #include <string> 16 #include <cassert> 17 18 #include "test_macros.h" 19 #include "min_allocator.h" 20 21 template <class S> 22 TEST_CONSTEXPR_CXX20 void 23 test(const S& s) 24 { 25 typedef typename S::traits_type T; 26 const typename S::value_type* str = s.c_str(); 27 if (s.size() > 0) 28 { 29 assert(T::compare(str, &s[0], s.size()) == 0); 30 assert(T::eq(str[s.size()], typename S::value_type())); 31 } 32 else 33 assert(T::eq(str[0], typename S::value_type())); 34 } 35 36 TEST_CONSTEXPR_CXX20 bool test() { 37 { 38 typedef std::string S; 39 test(S("")); 40 test(S("abcde")); 41 test(S("abcdefghij")); 42 test(S("abcdefghijklmnopqrst")); 43 } 44 #if TEST_STD_VER >= 11 45 { 46 typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S; 47 test(S("")); 48 test(S("abcde")); 49 test(S("abcdefghij")); 50 test(S("abcdefghijklmnopqrst")); 51 } 52 #endif 53 54 return true; 55 } 56 57 int main(int, char**) 58 { 59 test(); 60 #if TEST_STD_VER > 17 61 static_assert(test()); 62 #endif 63 64 return 0; 65 } 66