gdbsupport/underlying.h

   1 /* Copyright (C) 2017-2020 Free Software Foundation, Inc.
   2
   3    This file is part of GDB.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  17
  18 #ifndef COMMON_UNDERLYING_H
  19 #define COMMON_UNDERLYING_H
  20
  21 #include <type_traits>
  22
  23 /* Convert an enum to its underlying value.  */
  24
  25 template<typename E>
  26 constexpr typename std::underlying_type<E>::type
  27 to_underlying (E val) noexcept
  28 {
  29   return static_cast<typename std::underlying_type<E>::type> (val);
  30 }
  31
  32 #endif