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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<class T, StrictWeakOrder<auto, T> Compare>
// requires !SameType<T, Compare> && CopyConstructible<Compare>
// pair<const T&, const T&>
// minmax(const T& a, const T& b, Compare comp);
#include <algorithm>
#include <functional>
#include <cassert>
#include "test_macros.h"
template <class T, class C>
void
test(const T& a, const T& b, C c, const T& x, const T& y)
{
std::pair<const T&, const T&> p = std::minmax(a, b, c);
assert(&p.first == &x);
assert(&p.second == &y);
}
int main(int, char**)
{
{
int x = 0;
int y = 0;
test(x, y, std::greater<int>(), x, y);
test(y, x, std::greater<int>(), y, x);
}
{
int x = 0;
int y = 1;
test(x, y, std::greater<int>(), y, x);
test(y, x, std::greater<int>(), y, x);
}
{
int x = 1;
int y = 0;
test(x, y, std::greater<int>(), x, y);
test(y, x, std::greater<int>(), x, y);
}
#if TEST_STD_VER >= 14
{
// Note that you can't take a reference to a local var, since
// its address is not a compile-time constant.
constexpr static int x = 1;
constexpr static int y = 0;
constexpr auto p1 = std::minmax(x, y, std::greater<>());
static_assert(p1.first == x, "");
static_assert(p1.second == y, "");
constexpr auto p2 = std::minmax(y, x, std::greater<>());
static_assert(p2.first == x, "");
static_assert(p2.second == y, "");
}
#endif
return 0;
}
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