libcxx/include/__functional/unary_function.h

   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 template <class _Arg, class _Result>
  21 struct _LIBCPP_TEMPLATE_VIS unary_function
  22 {
  23     typedef _Arg    argument_type;
  24     typedef _Result result_type;
  25 };
  26
  27 _LIBCPP_END_NAMESPACE_STD
  28
  29 #endif // _LIBCPP___FUNCTIONAL_UNARY_FUNCTION_H