gdbsupport/invoke-result.h

   1 /* Compatibility wrapper around std::result_of and std::invoke_result.
   2
   3    Copyright (C) 2022-2023 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef GDBSUPPORT_INVOKE_RESULT_H
  21 #define GDBSUPPORT_INVOKE_RESULT_H
  22
  23 #include <type_traits>
  24
  25 namespace gdb
  26 {
  27 #if __cplusplus >= 201703L
  28 template<typename Callable, class... Args>
  29 using invoke_result = std::invoke_result<Callable, Args...>;
  30 #else
  31 template<typename Callable, typename... Args>
  32 using invoke_result = std::result_of<Callable (Args...)>;
  33 #endif
  34
  35 } /* namespace gdb */
  36
  37 #endif /* GDBSUPPORT_INVOKE_RESULT_H */