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 26 _LIBCPP_DEPRECATED_IN_CXX11 pointer_to_unary_function : public __unary_function<_Arg, _Result> { 27 _Result (*__f_)(_Arg); 28 29 public: pointer_to_unary_function(_Result (* __f)(_Arg))30 _LIBCPP_HIDE_FROM_ABI explicit pointer_to_unary_function(_Result (*__f)(_Arg)) : __f_(__f) {} operator()31 _LIBCPP_HIDE_FROM_ABI _Result operator()(_Arg __x) const { return __f_(__x); } 32 }; 33 34 template <class _Arg, class _Result> 35 _LIBCPP_DEPRECATED_IN_CXX11 inline _LIBCPP_HIDE_FROM_ABI pointer_to_unary_function<_Arg, _Result> ptr_fun(_Result (* __f)(_Arg))36ptr_fun(_Result (*__f)(_Arg)) { 37 return pointer_to_unary_function<_Arg, _Result>(__f); 38 } 39 40 #endif // _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_BINDERS) 41 42 _LIBCPP_END_NAMESPACE_STD 43 44 #endif // _LIBCPP___FUNCTIONAL_POINTER_TO_UNARY_FUNCTION_H 45