libcxx/include/__functional/pointer_to_unary_function.h

   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