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//===----------------------------------------------------------------------===//
//
// 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_UNARY_FUNCTION_H
#define _LIBCPP___FUNCTIONAL_UNARY_FUNCTION_H
#include <__config>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#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)
using argument_type _LIBCPP_DEPRECATED_IN_CXX17 = _Arg;
using result_type _LIBCPP_DEPRECATED_IN_CXX17 = _Result;
#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
#endif // _LIBCPP___FUNCTIONAL_UNARY_FUNCTION_H
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