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 // negate 13 14 #include <functional> 15 #include <type_traits> 16 #include <cassert> 17 18 int main() 19 { 20 typedef std::negate<int> F; 21 const F f = F(); 22 static_assert((std::is_base_of<std::unary_function<int, int>, F>::value), ""); 23 assert(f(36) == -36); 24 #if _LIBCPP_STD_VER > 11 25 typedef std::negate<> F2; 26 const F2 f2 = F2(); 27 assert(f2(36) == -36); 28 assert(f2(36L) == -36); 29 assert(f2(36.0) == -36); 30 31 constexpr int foo = std::negate<int> () (3); 32 static_assert ( foo == -3, "" ); 33 34 constexpr int bar = std::negate<> () (3.0); 35 static_assert ( bar == -3, "" ); 36 #endif 37 } 38
