56 lines
1.4 KiB
C++
56 lines
1.4 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef QDENGINE_MINIGAMES_ADV_HOLD_DATA_H
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#define QDENGINE_MINIGAMES_ADV_HOLD_DATA_H
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namespace QDEngine {
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template <class T>
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class HoldData {
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T _emptyData;
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T &_data;
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bool _empty;
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public:
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HoldData() : _data(_emptyData), _empty(true) {}
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HoldData(T* data, bool empty)
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: _data(data ? * data : _emptyData) {
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_empty = data ? empty : true;
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}
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void process(T& current) {
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if (_empty) {
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_data = current;
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_empty = false;
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} else
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current = _data;
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}
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const T &get() const {
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assert(!_empty);
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return _data;
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}
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};
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} // namespace QDEngine
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#endif // QDENGINE_MINIGAMES_ADV_HOLD_DATA_H
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