1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 // <functional>
10
11 // template <CopyConstructible Arg, Returnable Result>
12 // pointer_to_unary_function<Arg, Result>
13 // ptr_fun(Result (*f)(Arg));
14
15 // REQUIRES: c++03 || c++11 || c++14
16 // ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
17
18 #include <functional>
19 #include <type_traits>
20 #include <cassert>
21
22 #include "test_macros.h"
23
unary_f(int i)24 double unary_f(int i) {return 0.5 - i;}
25
main(int,char **)26 int main(int, char**)
27 {
28 assert(std::ptr_fun(unary_f)(36) == -35.5);
29
30 return 0;
31 }
32