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//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// <utility>
// template <class T1, class T2> struct pair
// void swap(pair& p);
#include <utility>
#include <cassert>
#include "test_macros.h"
struct S {
int i;
TEST_CONSTEXPR_CXX20 S() : i(0) {}
TEST_CONSTEXPR_CXX20 S(int j) : i(j) {}
TEST_CONSTEXPR_CXX20 bool operator==(int x) const { return i == x; }
};
TEST_CONSTEXPR_CXX20 bool test() {
{
typedef std::pair<int, short> P1;
P1 p1(3, static_cast<short>(4));
P1 p2(5, static_cast<short>(6));
p1.swap(p2);
assert(p1.first == 5);
assert(p1.second == 6);
assert(p2.first == 3);
assert(p2.second == 4);
}
{
typedef std::pair<int, S> P1;
P1 p1(3, S(4));
P1 p2(5, S(6));
p1.swap(p2);
assert(p1.first == 5);
assert(p1.second == 6);
assert(p2.first == 3);
assert(p2.second == 4);
}
return true;
}
int main(int, char**) {
test();
#if TEST_STD_VER >= 20
static_assert(test());
#endif
return 0;
}
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