| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <string> |
| |
| // basic_string<charT,traits,Allocator>& |
| // assign(basic_string<charT,traits>&& str); // constexpr since C++20 |
| |
| #include <string> |
| #include <utility> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| #include "min_allocator.h" |
| |
| template <class S> |
| TEST_CONSTEXPR_CXX20 void |
| test(S s, S str, S expected) |
| { |
| s.assign(std::move(str)); |
| LIBCPP_ASSERT(s.__invariants()); |
| assert(s == expected); |
| } |
| |
| template <class S> |
| TEST_CONSTEXPR_CXX20 void test_string() { |
| test(S(), S(), S()); |
| test(S(), S("12345"), S("12345")); |
| test(S(), S("1234567890"), S("1234567890")); |
| test(S(), S("12345678901234567890"), S("12345678901234567890")); |
| |
| test(S("12345"), S(), S()); |
| test(S("12345"), S("12345"), S("12345")); |
| test(S("12345"), S("1234567890"), S("1234567890")); |
| test(S("12345"), S("12345678901234567890"), S("12345678901234567890")); |
| |
| test(S("1234567890"), S(), S()); |
| test(S("1234567890"), S("12345"), S("12345")); |
| test(S("1234567890"), S("1234567890"), S("1234567890")); |
| test(S("1234567890"), S("12345678901234567890"), S("12345678901234567890")); |
| |
| test(S("12345678901234567890"), S(), S()); |
| test(S("12345678901234567890"), S("12345"), S("12345")); |
| test(S("12345678901234567890"), S("1234567890"), S("1234567890")); |
| test(S("12345678901234567890"), S("12345678901234567890"), |
| S("12345678901234567890")); |
| } |
| |
| TEST_CONSTEXPR_CXX20 bool test() { |
| test_string<std::string>(); |
| #if TEST_STD_VER >= 11 |
| test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char>>>(); |
| #endif |
| |
| return true; |
| } |
| |
| int main(int, char**) |
| { |
| test(); |
| #if TEST_STD_VER > 17 |
| static_assert(test()); |
| #endif |
| |
| return 0; |
| } |