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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 // <functional> 10 11 // less 12 13 #include <functional> 14 #include <type_traits> 15 #include <cassert> 16 17 #include "test_macros.h" 18 #include "pointer_comparison_test_helper.h" 19 20 int main(int, char**) 21 { 22 typedef std::less<int> F; 23 const F f = F(); 24 static_assert((std::is_same<int, F::first_argument_type>::value), "" ); 25 static_assert((std::is_same<int, F::second_argument_type>::value), "" ); 26 static_assert((std::is_same<bool, F::result_type>::value), "" ); 27 assert(!f(36, 36)); 28 assert(!f(36, 6)); 29 assert(f(6, 36)); 30 { 31 // test total ordering of int* for less<int*> and less<void>. 32 do_pointer_comparison_test<int, std::less>(); 33 } 34 #if TEST_STD_VER > 11 35 typedef std::less<> F2; 36 const F2 f2 = F2(); 37 assert(!f2(36, 36)); 38 assert(!f2(36, 6)); 39 assert( f2(6, 36)); 40 assert(!f2(36, 6.0)); 41 assert(!f2(36.0, 6)); 42 assert( f2(6, 36.0)); 43 assert( f2(6.0, 36)); 44 45 constexpr bool foo = std::less<int> () (36, 36); 46 static_assert ( !foo, "" ); 47 48 constexpr bool bar = std::less<> () (36.0, 36); 49 static_assert ( !bar, "" ); 50 #endif 51 52 return 0; 53 } 54