1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // <functional> 11 12 // less 13 14 #include <functional> 15 #include <type_traits> 16 #include <cassert> 17 18 #include "test_macros.h" 19 #include "pointer_comparison_test_helper.hpp" 20 21 int main() 22 { 23 typedef std::less<int> F; 24 const F f = F(); 25 static_assert((std::is_same<int, F::first_argument_type>::value), "" ); 26 static_assert((std::is_same<int, F::second_argument_type>::value), "" ); 27 static_assert((std::is_same<bool, F::result_type>::value), "" ); 28 assert(!f(36, 36)); 29 assert(!f(36, 6)); 30 assert(f(6, 36)); 31 { 32 // test total ordering of int* for less<int*> and less<void>. 33 do_pointer_comparison_test<int, std::less>(); 34 } 35 #if TEST_STD_VER > 11 36 typedef std::less<> F2; 37 const F2 f2 = F2(); 38 assert(!f2(36, 36)); 39 assert(!f2(36, 6)); 40 assert( f2(6, 36)); 41 assert(!f2(36, 6.0)); 42 assert(!f2(36.0, 6)); 43 assert( f2(6, 36.0)); 44 assert( f2(6.0, 36)); 45 46 constexpr bool foo = std::less<int> () (36, 36); 47 static_assert ( !foo, "" ); 48 49 constexpr bool bar = std::less<> () (36.0, 36); 50 static_assert ( !bar, "" ); 51 #endif 52 } 53
