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 22 template <class _Arg, class _Result> 23 struct _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 unary_function 24 { 25 typedef _Arg argument_type; 26 typedef _Result result_type; 27 }; 28 29 #endif // _LIBCPP_STD_VER <= 14 30 31 template <class _Arg, class _Result> struct __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") 41 template <class _Arg, class _Result> 42 using __unary_function = unary_function<_Arg, _Result>; 43 _LIBCPP_DIAGNOSTIC_POP 44 #else 45 template <class _Arg, class _Result> 46 using __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