1//===----------------------------------------------------------------------===// 2// 3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4// See https://llvm.org/LICENSE.txt for license information. 5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6// 7//===----------------------------------------------------------------------===// 8 9#ifndef _LIBCPP___FUNCTIONAL_UNARY_FUNCTION_H 10#define _LIBCPP___FUNCTIONAL_UNARY_FUNCTION_H 11 12#include <__config> 13 14#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 15# pragma GCC system_header 16#endif 17 18_LIBCPP_BEGIN_NAMESPACE_STD 19 20#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_UNARY_BINARY_FUNCTION) 21 22template <class _Arg, class _Result> 23struct _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 unary_function { 24 typedef _Arg argument_type; 25 typedef _Result result_type; 26}; 27 28#endif // _LIBCPP_STD_VER <= 14 29 30template <class _Arg, class _Result> 31struct __unary_function_keep_layout_base { 32#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_BINDER_TYPEDEFS) 33 using argument_type _LIBCPP_DEPRECATED_IN_CXX17 = _Arg; 34 using result_type _LIBCPP_DEPRECATED_IN_CXX17 = _Result; 35#endif 36}; 37 38#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_UNARY_BINARY_FUNCTION) 39_LIBCPP_DIAGNOSTIC_PUSH 40_LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wdeprecated-declarations") 41template <class _Arg, class _Result> 42using __unary_function = unary_function<_Arg, _Result>; 43_LIBCPP_DIAGNOSTIC_POP 44#else 45template <class _Arg, class _Result> 46using __unary_function = __unary_function_keep_layout_base<_Arg, _Result>; 47#endif 48 49_LIBCPP_END_NAMESPACE_STD 50 51#endif // _LIBCPP___FUNCTIONAL_UNARY_FUNCTION_H 52