autorelease.hpp

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/*
 * This file is part of OpenTTD.
 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef AUTORELEASE_HPP
#define AUTORELEASE_HPP
 
template <auto Tfunc>
struct DeleterFromFunc {
  template <typename T>
  constexpr void operator()(T *arg) const
  {
    if (arg != nullptr) Tfunc(arg);
  }
};
struct DeleterFromFunc {…};
 
template <typename T, auto Tfunc>
using AutoRelease = std::unique_ptr<T, DeleterFromFunc<Tfunc>>;
 
#endif /* AUTORELEASE_HPP */