mirror of
https://github.com/OpenTTD/OpenTTD
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28 lines
1.2 KiB
C++
28 lines
1.2 KiB
C++
/*
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* This file is part of OpenTTD.
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* 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.
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* 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.
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* 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 <https://www.gnu.org/licenses/old-licenses/gpl-2.0>.
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*/
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/** @file autorelease.hpp Helper for std::unique_ptr to use an arbitrary function as the deleter. */
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#ifndef AUTORELEASE_HPP
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#define AUTORELEASE_HPP
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/** Deleter that calls a function rather than deleting the pointer. */
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template <auto Tfunc>
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struct DeleterFromFunc {
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template <typename T>
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constexpr void operator()(T *arg) const
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{
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if (arg != nullptr) Tfunc(arg);
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}
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};
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/** Specialisation of std::unique_ptr for objects which must be deleted by calling a function. */
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template <typename T, auto Tfunc>
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using AutoRelease = std::unique_ptr<T, DeleterFromFunc<Tfunc>>;
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#endif /* AUTORELEASE_HPP */
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