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 int main() 19 { 20 typedef std::less<int> F; 21 const F f = F(); 22 static_assert((std::is_base_of<std::binary_function<int, int, bool>, F>::value), ""); 23 assert(!f(36, 36)); 24 assert(!f(36, 6)); 25 assert(f(6, 36)); 26 #if _LIBCPP_STD_VER > 11 27 typedef std::less<> F2; 28 const F2 f2 = F2(); 29 assert(!f2(36, 36)); 30 assert(!f2(36, 6)); 31 assert( f2(6, 36)); 32 assert(!f2(36, 6.0)); 33 assert(!f2(36.0, 6)); 34 assert( f2(6, 36.0)); 35 assert( f2(6.0, 36)); 36 37 constexpr bool foo = std::less<int> () (36, 36); 38 static_assert ( !foo, "" ); 39 40 constexpr bool bar = std::less<> () (36.0, 36); 41 static_assert ( !bar, "" ); 42 #endif 43 } 44
