41 lines
1.1 KiB
C++
41 lines
1.1 KiB
C++
/*
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Copyright (C) 2012 Paul Davis
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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 2 of the License, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __libpbd_unwinder_h__
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#define __libpbd_unwinder_h__
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#include "pbd/libpbd_visibility.h"
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namespace PBD {
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template <typename T>
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class /*LIBPBD_API*/ Unwinder {
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public:
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Unwinder (T& var, T new_val) : _var (var), _old_val (var) { var = new_val; }
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~Unwinder () { _var = _old_val; }
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private:
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T& _var;
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T _old_val;
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};
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}
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#endif /* __libpbd_unwinder_h__ */
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