58 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// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS10 11// <functional>12 13// less14 15#include <functional>16#include <type_traits>17#include <cassert>18 19#include "test_macros.h"20#include "pointer_comparison_test_helper.h"21 22int main(int, char**)23{24 typedef std::less<int> F;25 const F f = F();26#if TEST_STD_VER <= 1727 static_assert((std::is_same<int, F::first_argument_type>::value), "" );28 static_assert((std::is_same<int, F::second_argument_type>::value), "" );29 static_assert((std::is_same<bool, F::result_type>::value), "" );30#endif31 assert(!f(36, 36));32 assert(!f(36, 6));33 assert(f(6, 36));34 {35 // test total ordering of int* for less<int*> and less<void>.36 do_pointer_comparison_test<std::less>();37 }38#if TEST_STD_VER > 1139 typedef std::less<> F2;40 const F2 f2 = F2();41 assert(!f2(36, 36));42 assert(!f2(36, 6));43 assert( f2(6, 36));44 assert(!f2(36, 6.0));45 assert(!f2(36.0, 6));46 assert( f2(6, 36.0));47 assert( f2(6.0, 36));48 49 constexpr bool foo = std::less<int> () (36, 36);50 static_assert ( !foo, "" );51 52 constexpr bool bar = std::less<> () (36.0, 36);53 static_assert ( !bar, "" );54#endif55 56 return 0;57}58