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 // basic_string<charT,traits,Allocator>& assign(const charT* s); // constexpr since C++20 14 15 #include <string> 16 #include <stdexcept> 17 #include <cassert> 18 19 #include "test_macros.h" 20 #include "min_allocator.h" 21 22 template <class S> 23 TEST_CONSTEXPR_CXX20 void 24 test(S s, const typename S::value_type* str, S expected) 25 { 26 s.assign(str); 27 LIBCPP_ASSERT(s.__invariants()); 28 assert(s == expected); 29 } 30 31 TEST_CONSTEXPR_CXX20 bool test() { 32 { 33 typedef std::string S; 34 test(S(), "", S()); 35 test(S(), "12345", S("12345")); 36 test(S(), "12345678901234567890", S("12345678901234567890")); 37 38 test(S("12345"), "", S()); 39 test(S("12345"), "12345", S("12345")); 40 test(S("12345"), "1234567890", S("1234567890")); 41 42 test(S("12345678901234567890"), "", S()); 43 test(S("12345678901234567890"), "12345", S("12345")); 44 test(S("12345678901234567890"), "12345678901234567890", 45 S("12345678901234567890")); 46 } 47 #if TEST_STD_VER >= 11 48 { 49 typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S; 50 test(S(), "", S()); 51 test(S(), "12345", S("12345")); 52 test(S(), "12345678901234567890", S("12345678901234567890")); 53 54 test(S("12345"), "", S()); 55 test(S("12345"), "12345", S("12345")); 56 test(S("12345"), "1234567890", S("1234567890")); 57 58 test(S("12345678901234567890"), "", S()); 59 test(S("12345678901234567890"), "12345", S("12345")); 60 test(S("12345678901234567890"), "12345678901234567890", 61 S("12345678901234567890")); 62 } 63 #endif 64 65 { // test assignment to self 66 typedef std::string S; 67 S s_short = "123/"; 68 S s_long = "Lorem ipsum dolor sit amet, consectetur/"; 69 70 s_short.assign(s_short.c_str()); 71 assert(s_short == "123/"); 72 s_short.assign(s_short.c_str() + 2); 73 assert(s_short == "3/"); 74 75 s_long.assign(s_long.c_str() + 30); 76 assert(s_long == "nsectetur/"); 77 } 78 79 return true; 80 } 81 82 int main(int, char**) 83 { 84 test(); 85 #if TEST_STD_VER > 17 86 static_assert(test()); 87 #endif 88 89 return 0; 90 } 91