68 lines · cpp
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-exception6//7//===----------------------------------------------------------------------===//8 9// <string>10 11// basic_string<charT,traits,Allocator>&12// assign(basic_string<charT,traits>&& str); // constexpr since C++2013 14#include <string>15#include <utility>16#include <cassert>17 18#include "test_macros.h"19#include "min_allocator.h"20 21template <class S>22TEST_CONSTEXPR_CXX20 void test(S s, S str, S expected) {23 s.assign(std::move(str));24 LIBCPP_ASSERT(s.__invariants());25 assert(s == expected);26}27 28template <class S>29TEST_CONSTEXPR_CXX20 void test_string() {30 test(S(), S(), S());31 test(S(), S("12345"), S("12345"));32 test(S(), S("1234567890"), S("1234567890"));33 test(S(), S("12345678901234567890"), S("12345678901234567890"));34 35 test(S("12345"), S(), S());36 test(S("12345"), S("12345"), S("12345"));37 test(S("12345"), S("1234567890"), S("1234567890"));38 test(S("12345"), S("12345678901234567890"), S("12345678901234567890"));39 40 test(S("1234567890"), S(), S());41 test(S("1234567890"), S("12345"), S("12345"));42 test(S("1234567890"), S("1234567890"), S("1234567890"));43 test(S("1234567890"), S("12345678901234567890"), S("12345678901234567890"));44 45 test(S("12345678901234567890"), S(), S());46 test(S("12345678901234567890"), S("12345"), S("12345"));47 test(S("12345678901234567890"), S("1234567890"), S("1234567890"));48 test(S("12345678901234567890"), S("12345678901234567890"), S("12345678901234567890"));49}50 51TEST_CONSTEXPR_CXX20 bool test() {52 test_string<std::string>();53#if TEST_STD_VER >= 1154 test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char>>>();55#endif56 57 return true;58}59 60int main(int, char**) {61 test();62#if TEST_STD_VER > 1763 static_assert(test());64#endif65 66 return 0;67}68