libcxx/include/__functional/binary_function.h

   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   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
  32 template <class _Arg1, class _Arg2, class _Result>
  33 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