lily/music-constructor.cc

   1 /*
   2   music-constructor.cc --  implement Music_constructor
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2001--2002  Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9
  10 #include <map>                  // UGH.
  11 #include "music-constructor.hh"
  12 typedef Music* (*Music_ctor) ();
  13
  14 static std::map<String,Music_ctor> *ctors_map_;
  15
  16 void
  17 add_music_ctor (String s,  Music_ctor c)
  18 {
  19   if (!ctors_map_)
  20     ctors_map_ = new std::map<String, Music_ctor>;
  21
  22  (*ctors_map_)[s] = c;
  23 }
  24
  25
  26 Music_ctor
  27 get_music_ctor (String s)
  28 {
  29   if (ctors_map_->find (s) == ctors_map_->end ())
  30     return 0;
  31
  32   return (* ctors_map_)[s];
  33 }
  34
  35 Music*
  36 make_music (String s)
  37 {
  38   return (*get_music_ctor (s)) () ;
  39 }
  40