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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
//
//===----------------------------------------------------------------------===//
// <algorithm>
// template<Iterator Iter1, Iterator Iter2>
// requires HasSwap<Iter1::reference, Iter2::reference>
// void iter_swap(Iter1 a, Iter2 b); // constexpr since C++20
#include <algorithm>
#include <cassert>
#include "test_macros.h"
#include "test_iterators.h"
#include "type_algorithms.h"
struct TestIterators {
template <class Iter>
TEST_CONSTEXPR_CXX20 void operator()() {
types::for_each(types::forward_iterator_list<int*>(), TestImpl<Iter>());
}
template <class Iter1>
struct TestImpl {
template <class Iter2>
TEST_CONSTEXPR_CXX20 void operator()() {
int i = 1;
int j = 2;
std::iter_swap(Iter1(&i), Iter2(&j));
assert(i == 2 && j == 1);
}
};
};
TEST_CONSTEXPR_CXX20 bool test() {
types::for_each(types::forward_iterator_list<int*>(), TestIterators());
return true;
}
int main(int, char**) {
test();
#if TEST_STD_VER >= 20
static_assert(test());
#endif
return 0;
}
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