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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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
// <functional>
// ranges::greater
#include <functional>
#include <type_traits>
#include <cassert>
#include "test_macros.h"
#include "compare_types.h"
#include "MoveOnly.h"
#include "pointer_comparison_test_helper.h"
struct NotTotallyOrdered {
friend bool operator<(const NotTotallyOrdered&, const NotTotallyOrdered&);
};
static_assert(!std::is_invocable_v<std::ranges::greater, NotTotallyOrdered, NotTotallyOrdered>);
static_assert(!std::is_invocable_v<std::ranges::greater, int, MoveOnly>);
static_assert(std::is_invocable_v<std::ranges::greater, explicit_operators, explicit_operators>);
static_assert(requires { typename std::ranges::greater::is_transparent; });
constexpr bool test() {
auto fn = std::ranges::greater();
assert(fn(MoveOnly(42), MoveOnly(41)));
ForwardingTestObject a;
ForwardingTestObject b;
assert(!fn(a, b));
assert(fn(std::move(a), std::move(b)));
assert(!fn(2, 2));
assert(!fn(1, 2));
assert(fn(2, 1));
assert(fn(2, 1L));
return true;
}
int main(int, char**) {
test();
static_assert(test());
// test total ordering of int* for greater<int*> and greater<void>.
do_pointer_comparison_test(std::ranges::greater());
return 0;
}
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