2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2005--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
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 UNPURE_PURE_CONTAINER_HH
21 #define UNPURE_PURE_CONTAINER_HH
23 #include "lily-guile.hh"
24 #include "small-smobs.hh"
26 class Unpure_pure_container : public Smob2<Unpure_pure_container>
29 static const char type_p_name_ [];
30 SCM unpure_part () const { return scm1 (); }
31 // A container that has the same callback for both 'pure' and 'unpure' lookups
32 // and which ignores the 'start' and 'end' columnns.
33 // Such a callback will give the same answer for tentative or final layouts.
34 bool is_unchanging () const { return SCM_UNBNDP (scm2 ()); }
35 SCM pure_part () const;
36 static SCM make_smob (SCM a, SCM b = SCM_UNDEFINED)
38 if (SCM_UNBNDP (b) && !ly_is_procedure (a))
39 return Smob2<Unpure_pure_container>::make_smob (a, a);
40 return Smob2<Unpure_pure_container>::make_smob (a, b);
42 int print_smob (SCM, scm_print_state *);
45 #endif /* UNPURE_PURE_CONTAINER_HH */