libcxx/include/__functional/pointer_to_binary_function.h

// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef _LIBCPP___FUNCTIONAL_POINTER_TO_BINARY_FUNCTION_H
#define _LIBCPP___FUNCTIONAL_POINTER_TO_BINARY_FUNCTION_H

#include <__config>
#include <__functional/binary_function.h>

#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#  pragma GCC system_header
#endif

#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_BINDERS)

_LIBCPP_BEGIN_NAMESPACE_STD

template <class _Arg1, class _Arg2, class _Result>
class _LIBCPP_DEPRECATED_IN_CXX11 pointer_to_binary_function : public __binary_function<_Arg1, _Arg2, _Result> {
  _Result (*__f_)(_Arg1, _Arg2);

public:
  _LIBCPP_HIDE_FROM_ABI explicit pointer_to_binary_function(_Result (*__f)(_Arg1, _Arg2)) : __f_(__f) {}
  _LIBCPP_HIDE_FROM_ABI _Result operator()(_Arg1 __x, _Arg2 __y) const { return __f_(__x, __y); }
};

template <class _Arg1, class _Arg2, class _Result>
_LIBCPP_DEPRECATED_IN_CXX11 inline _LIBCPP_HIDE_FROM_ABI pointer_to_binary_function<_Arg1, _Arg2, _Result>
ptr_fun(_Result (*__f)(_Arg1, _Arg2)) {
  return pointer_to_binary_function<_Arg1, _Arg2, _Result>(__f);
}

_LIBCPP_END_NAMESPACE_STD

#endif

#endif // _LIBCPP___FUNCTIONAL_POINTER_TO_BINARY_FUNCTION_H