2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2012 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/>.
22 class Undead : public Simple_smob<Undead>
25 int print_smob (SCM, scm_print_state *) const;
26 SCM mark_smob () const;
27 static const char * const type_p_name_;
31 SCM object () const { return object_; }
32 Undead (SCM object = SCM_UNDEFINED) : object_ (object) { };
36 Undead::mark_smob () const
38 bool saved = parsed_objects_should_be_dead;
39 parsed_objects_should_be_dead = false;
40 scm_gc_mark (object ());
41 parsed_objects_should_be_dead = saved;
46 Undead::print_smob (SCM port, scm_print_state *) const
48 scm_puts ("#<Undead ", port);
49 scm_display (object (), port);
50 scm_puts (" >", port);
54 const char * const Undead::type_p_name_ = "ly:undead?";
56 LY_DEFINE (ly_make_undead, "ly:make-undead",
57 1, 0, 0, (SCM object),
58 "This packages @var{object} in a manner that keeps it from"
59 " triggering \"Parsed object should be dead\" messages.")
61 Undead undead (object);
62 return undead.smobbed_copy ();
65 LY_DEFINE (ly_get_undead, "ly:get-undead",
66 1, 0, 0, (SCM undead),
67 "Get back object from @var{undead}.")
69 LY_ASSERT_SMOB (Undead, undead, 1);
70 return unsmob<Undead> (undead)->object ();
74 // These are not protected since the means of protecting them would be
75 // problematic to trigger during the mark pass where the array element
76 // references get set. However, they get set only when in the mark
77 // pass when checking for parsed elements that should be dead, and we
78 // query and clear them immediately afterwards. So there should be no
79 // way in which the references would have become unprotected in the
82 vector<parsed_dead *> parsed_dead::elements;
85 parsed_dead::readout ()
88 for (vsize i = 0; i < elements.size (); i++)
90 SCM elt = elements[i]->readout_one ();
91 if (!SCM_UNBNDP (elt))
92 result = scm_cons (elt, result);
97 LY_DEFINE (ly_parsed_undead_list_x, "ly:parsed-undead-list!",
99 "Return the list of objects that have been found live"
100 " that should have been dead, and clear that list.")
102 return parsed_dead::readout ();