65 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9// UNSUPPORTED: c++03, c++11, c++14, c++1710 11// <functional>12 13// ranges::less_equal14 15#include <cassert>16#include <functional>17#include <type_traits>18#include <utility>19 20#include "test_macros.h"21#include "compare_types.h"22#include "MoveOnly.h"23#include "pointer_comparison_test_helper.h"24 25struct NotTotallyOrdered {26 friend bool operator<(const NotTotallyOrdered&, const NotTotallyOrdered&);27};28 29static_assert(!std::is_invocable_v<std::ranges::less_equal, NotTotallyOrdered, NotTotallyOrdered>);30static_assert(!std::is_invocable_v<std::ranges::less_equal, int, MoveOnly>);31static_assert(std::is_invocable_v<std::ranges::less_equal, explicit_operators, explicit_operators>);32 33static_assert(requires { typename std::ranges::less_equal::is_transparent; });34 35constexpr bool test() {36 auto fn = std::ranges::less_equal();37 38 assert(fn(MoveOnly(41), MoveOnly(42)));39 40 // These are the opposite of other tests.41 ForwardingTestObject a;42 ForwardingTestObject b;43 assert(fn(a, b));44 assert(!fn(std::move(a), std::move(b)));45 46 assert(fn(1, 2));47 assert(fn(2, 2));48 assert(!fn(2, 1));49 50 assert(!fn(2, 1L));51 52 return true;53}54 55int main(int, char**) {56 57 test();58 static_assert(test());59 60 // test total ordering of int* for less_equal<int*> and less_equal<void>.61 do_pointer_comparison_test(std::ranges::less_equal());62 63 return 0;64}65