1 // -*- C++ -*-
2 //===----------------------------------------------------------------------===//
3 //
4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5 // See https://llvm.org/LICENSE.txt for license information.
6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #ifndef _LIBCPP___FUNCTIONAL_POINTER_TO_UNARY_FUNCTION_H
11 #define _LIBCPP___FUNCTIONAL_POINTER_TO_UNARY_FUNCTION_H
12 
13 #include <__config>
14 #include <__functional/unary_function.h>
15 
16 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
17 #pragma GCC system_header
18 #endif
19 
20 _LIBCPP_BEGIN_NAMESPACE_STD
21 
22 #if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_BINDERS)
23 
24 template <class _Arg, class _Result>
25 class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 pointer_to_unary_function
26     : public unary_function<_Arg, _Result>
27 {
28     _Result (*__f_)(_Arg);
29 public:
30     _LIBCPP_INLINE_VISIBILITY explicit pointer_to_unary_function(_Result (*__f)(_Arg))
31         : __f_(__f) {}
32     _LIBCPP_INLINE_VISIBILITY _Result operator()(_Arg __x) const
33         {return __f_(__x);}
34 };
35 
36 template <class _Arg, class _Result>
37 _LIBCPP_DEPRECATED_IN_CXX11 inline _LIBCPP_INLINE_VISIBILITY
38 pointer_to_unary_function<_Arg,_Result>
39 ptr_fun(_Result (*__f)(_Arg))
40     {return pointer_to_unary_function<_Arg,_Result>(__f);}
41 
42 #endif // _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_BINDERS)
43 
44 _LIBCPP_END_NAMESPACE_STD
45 
46 #endif // _LIBCPP___FUNCTIONAL_POINTER_TO_UNARY_FUNCTION_H
47