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_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_SUPPRESS_DEPRECATED_PUSH
43template <class _Arg1, class _Arg2, class _Result>
44using __binary_function _LIBCPP_NODEBUG = binary_function<_Arg1, _Arg2, _Result>;
45_LIBCPP_SUPPRESS_DEPRECATED_POP
46#else
47template <class _Arg1, class _Arg2, class _Result>
48using __binary_function _LIBCPP_NODEBUG = __binary_function_keep_layout_base<_Arg1, _Arg2, _Result>;
49#endif
50
51_LIBCPP_END_NAMESPACE_STD
52
53#endif // _LIBCPP___FUNCTIONAL_BINARY_FUNCTION_H
54