2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2015 Daniel Eble <dan@faithful.be>
6 LilyPond is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 LilyPond is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
20 #ifndef CHANGE_SEQUENCE_ITERATOR_HH
21 #define CHANGE_SEQUENCE_ITERATOR_HH
23 #include "music-wrapper-iterator.hh"
26 /** base for iterators that perform a sequence of timed context changes */
27 class Change_sequence_iterator : public Music_wrapper_iterator
30 Change_sequence_iterator ();
33 virtual void construct_children ();
34 virtual void process (Moment);
37 // implement in derived class to effect a context change
38 virtual void change_to (const string &id) = 0;
41 // There is no need to protect this in derived_mark() because it is protected
42 // via Music_iterator::music_.
47 #endif /* CHANGE_SEQUENCE_ITERATOR_HH */