| //===----------------------------------------------------------------------===// |
| // |
| // 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> |
| |
| // template<class charT, class traits, class Allocator> |
| // void swap(basic_string<charT,traits,Allocator>& lhs, |
| // basic_string<charT,traits,Allocator>& rhs); // constexpr since C++20 |
| |
| #include <string> |
| #include <stdexcept> |
| #include <algorithm> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| #include "min_allocator.h" |
| |
| template <class S> |
| TEST_CONSTEXPR_CXX20 void |
| test(S s1, S s2) |
| { |
| S s1_ = s1; |
| S s2_ = s2; |
| swap(s1, s2); |
| LIBCPP_ASSERT(s1.__invariants()); |
| LIBCPP_ASSERT(s2.__invariants()); |
| assert(s1 == s2_); |
| assert(s2 == s1_); |
| } |
| |
| TEST_CONSTEXPR_CXX20 bool test() { |
| { |
| typedef std::string S; |
| test(S(""), S("")); |
| test(S(""), S("12345")); |
| test(S(""), S("1234567890")); |
| test(S(""), S("12345678901234567890")); |
| test(S("abcde"), S("")); |
| test(S("abcde"), S("12345")); |
| test(S("abcde"), S("1234567890")); |
| test(S("abcde"), S("12345678901234567890")); |
| test(S("abcdefghij"), S("")); |
| test(S("abcdefghij"), S("12345")); |
| test(S("abcdefghij"), S("1234567890")); |
| test(S("abcdefghij"), S("12345678901234567890")); |
| test(S("abcdefghijklmnopqrst"), S("")); |
| test(S("abcdefghijklmnopqrst"), S("12345")); |
| test(S("abcdefghijklmnopqrst"), S("1234567890")); |
| test(S("abcdefghijklmnopqrst"), S("12345678901234567890")); |
| } |
| #if TEST_STD_VER >= 11 |
| { |
| typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S; |
| test(S(""), S("")); |
| test(S(""), S("12345")); |
| test(S(""), S("1234567890")); |
| test(S(""), S("12345678901234567890")); |
| test(S("abcde"), S("")); |
| test(S("abcde"), S("12345")); |
| test(S("abcde"), S("1234567890")); |
| test(S("abcde"), S("12345678901234567890")); |
| test(S("abcdefghij"), S("")); |
| test(S("abcdefghij"), S("12345")); |
| test(S("abcdefghij"), S("1234567890")); |
| test(S("abcdefghij"), S("12345678901234567890")); |
| test(S("abcdefghijklmnopqrst"), S("")); |
| test(S("abcdefghijklmnopqrst"), S("12345")); |
| test(S("abcdefghijklmnopqrst"), S("1234567890")); |
| test(S("abcdefghijklmnopqrst"), S("12345678901234567890")); |
| } |
| #endif |
| |
| return true; |
| } |
| |
| int main(int, char**) |
| { |
| test(); |
| #if TEST_STD_VER > 17 |
| static_assert(test()); |
| #endif |
| |
| return 0; |
| } |