1 // -*- C++ -*-
2 //===----------------------------------------------------------------------===//
3 //
4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5 // See https://llvm.org/LICENSE.txt for license information.
6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #ifndef _LIBCPP___FUNCTIONAL_BINARY_FUNCTION_H
11 #define _LIBCPP___FUNCTIONAL_BINARY_FUNCTION_H
12 
13 #include <__config>
14 
15 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
16 #  pragma GCC system_header
17 #endif
18 
19 _LIBCPP_BEGIN_NAMESPACE_STD
20 
21 #if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_UNARY_BINARY_FUNCTION)
22 
23 template <class _Arg1, class _Arg2, class _Result>
24 struct _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 binary_function
25 {
26     typedef _Arg1   first_argument_type;
27     typedef _Arg2   second_argument_type;
28     typedef _Result result_type;
29 };
30 
31 #endif // _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_UNARY_BINARY_FUNCTION)
32 
33 template <class _Arg1, class _Arg2, class _Result> struct __binary_function_keep_layout_base {
34 #if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_BINDER_TYPEDEFS)
35   using first_argument_type _LIBCPP_DEPRECATED_IN_CXX17 = _Arg1;
36   using second_argument_type _LIBCPP_DEPRECATED_IN_CXX17 = _Arg2;
37   using result_type _LIBCPP_DEPRECATED_IN_CXX17 = _Result;
38 #endif
39 };
40 
41 #if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_UNARY_BINARY_FUNCTION)
42 _LIBCPP_DIAGNOSTIC_PUSH
43 _LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wdeprecated-declarations")
44 template <class _Arg1, class _Arg2, class _Result>
45 using __binary_function = binary_function<_Arg1, _Arg2, _Result>;
46 _LIBCPP_DIAGNOSTIC_POP
47 #else
48 template <class _Arg1, class _Arg2, class _Result>
49 using __binary_function = __binary_function_keep_layout_base<_Arg1, _Arg2, _Result>;
50 #endif
51 
52 _LIBCPP_END_NAMESPACE_STD
53 
54 #endif // _LIBCPP___FUNCTIONAL_BINARY_FUNCTION_H
55