1c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant//===----------------------------------------------------------------------===// 2c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// 3c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// The LLVM Compiler Infrastructure 4c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// 5b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// This file is dual licensed under the MIT and the University of Illinois Open 6b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// Source Licenses. See LICENSE.TXT for details. 7c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// 8c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant//===----------------------------------------------------------------------===// 9c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 10c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// <functional> 11c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 12c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// template <CopyConstructible Arg, Returnable Result> 13c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// pointer_to_unary_function<Arg, Result> 14c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// ptr_fun(Result (*f)(Arg)); 15c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 16c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant#include <functional> 17c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant#include <type_traits> 18c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant#include <cassert> 19c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 20c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnantdouble unary_f(int i) {return 0.5 - i;} 21c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 22c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnantint main() 23c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant{ 24c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(std::ptr_fun(unary_f)(36) == -35.5); 25c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant} 26