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 // pointer_to_unary_function 13 14 #include <functional> 15 #include <type_traits> 16 #include <cassert> 17 18 double unary_f(int i) {return 0.5 - i;} 19 20 int main() 21 { 22 typedef std::pointer_to_unary_function<int, double> F; 23 static_assert((std::is_base_of<std::unary_function<int, double>, F>::value), ""); 24 const F f(unary_f); 25 assert(f(36) == -35.5); 26 } 27
