//===----------------------------------------------------------------------===// // // The LLVM Compiler Infrastructure // // This file is dual licensed under the MIT and the University of Illinois Open // Source Licenses. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // <functional> // template <CopyConstructible Arg, Returnable Result> // pointer_to_unary_function<Arg, Result> // ptr_fun(Result (*f)(Arg)); #include <functional> #include <type_traits> #include <cassert> double unary_f(int i) {return 0.5 - i;} int main() { assert(std::ptr_fun(unary_f)(36) == -35.5); }