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
23template <class _Arg1, class _Arg2, class _Result>
24struct _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 binary_function {
25  typedef _Arg1 first_argument_type;
26  typedef _Arg2 second_argument_type;
27  typedef _Result result_type;
28};
29
30#endif // _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_UNARY_BINARY_FUNCTION)
31
32template <class _Arg1, class _Arg2, class _Result>
33struct __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")
44template <class _Arg1, class _Arg2, class _Result>
45using __binary_function = binary_function<_Arg1, _Arg2, _Result>;
46_LIBCPP_DIAGNOSTIC_POP
47#else
48template <class _Arg1, class _Arg2, class _Result>
49using __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