//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//==============================================================================
// NOTICE: This file has been modified by Green Hills Software, Inc.  Such
// modifications are subject to copyright by Green Hills Software, Inc.  See the
// "Green Hills Software Modifications" section in the LICENSE.txt included with
// this distribution for more information.
//==============================================================================

#ifndef _LIBCPP___FUNCTIONAL_UNARY_FUNCTION_H
#define _LIBCPP___FUNCTIONAL_UNARY_FUNCTION_H

#include <__config>

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

#if defined(__ghs__)
  #pragma ghs start_cxx_lib_header
  #pragma ghs startdata
  #if defined(__ghs_max_pack_value)
    #pragma pack (push, __ghs_max_pack_value)
  #endif
#endif

_LIBCPP_BEGIN_NAMESPACE_STD

#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_UNARY_BINARY_FUNCTION)

template <class _Arg, class _Result>
struct _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 unary_function
{
    typedef _Arg    argument_type;
    typedef _Result result_type;
};

#endif // _LIBCPP_STD_VER <= 14

template <class _Arg, class _Result> struct __unary_function_keep_layout_base {
#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_BINDER_TYPEDEFS)
#ifndef _LIBCPP_COMPILER_GHS
  using argument_type _LIBCPP_DEPRECATED_IN_CXX17 = _Arg;
  using result_type _LIBCPP_DEPRECATED_IN_CXX17 = _Result;
#elif _LIBCPP_STD_VER == 17
// Manually put the deprecated attribute on because the GHS compiler does not
// allow GNU-style attributes on alias declarations.
  using argument_type [[deprecated]] = _Arg;
  using result_type [[deprecated]]  = _Result;
#else
  using argument_type = _Arg;
  using result_type = _Result;
#endif
#endif
};

#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_UNARY_BINARY_FUNCTION)
_LIBCPP_DIAGNOSTIC_PUSH
_LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wdeprecated-declarations")
template <class _Arg, class _Result>
using __unary_function = unary_function<_Arg, _Result>;
_LIBCPP_DIAGNOSTIC_POP
#else
template <class _Arg, class _Result>
using __unary_function = __unary_function_keep_layout_base<_Arg, _Result>;
#endif

_LIBCPP_END_NAMESPACE_STD

#if defined(__ghs__)
  #if defined(__ghs_max_pack_value)
    #pragma pack(pop)
  #endif
  #pragma ghs enddata
  #pragma ghs end_cxx_lib_header
#endif

#endif // _LIBCPP___FUNCTIONAL_UNARY_FUNCTION_H