indent

[lilypond.git] / lily / lily-lexer.cc

diff --git a/lily/lily-lexer.cc b/lily/lily-lexer.cc
index 374eed4ec812dc51ab33a66994b7a70fc168f164..178853fc15b5cf5a9242710437c6e110ebed1184 100644 (file)
--- a/lily/lily-lexer.cc
+++ b/lily/lily-lexer.cc
@@ -1,9 +1,20 @@
 /*
-  lily-lexer.cc -- implement Lily_lexer
+  This file is part of LilyPond, the GNU music typesetter.
 
-  source file of the GNU LilyPond music typesetter
+  Copyright (C) 1997--2010 Han-Wen Nienhuys <hanwen@xs4all.nl>
 
-  (c) 1997--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
+  LilyPond is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  LilyPond is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 #include "lily-lexer.hh"
@@ -12,6 +23,7 @@
 #include <sstream>
 using namespace std;
 
+#include "context.hh"  // for nested_property_alist
 #include "international.hh"
 #include "interval.hh"
 #include "keyword.hh"
@@ -95,6 +107,7 @@ Lily_lexer::Lily_lexer (Sources *sources, Lily_parser *parser)
   error_level_ = 0;
   is_main_input_ = false;
   start_module_ = SCM_EOL;
+  chord_repetition_ = Chord_repetition ();
   smobify_self ();
 
   add_scope (ly_make_anonymous_module (false));
@@ -111,6 +124,7 @@ Lily_lexer::Lily_lexer (Lily_lexer const &src, Lily_parser *parser)
   pitchname_tab_stack_ = src.pitchname_tab_stack_;
   sources_ = src.sources_;
   start_module_ = SCM_EOL;
+  chord_repetition_ = src.chord_repetition_;
 
   error_level_ = src.error_level_;
   is_main_input_ = src.is_main_input_;
@@ -256,12 +270,20 @@ Lily_lexer::new_input (string str, Sources *ss)
   Includable_lexer::new_input (str, ss);
 }
 
+// PATH is either a single symbol (or string) or a list of symbols
+// giving the path to a nested property.  A symbol is treated the same
+// as a list of length 1.
 void
-Lily_lexer::set_identifier (SCM name, SCM s)
+Lily_lexer::set_identifier (SCM path, SCM val)
 {
-  SCM sym = name;
-  if (scm_is_string (name))
-    sym = scm_string_to_symbol (name);
+  SCM sym = path;
+  if (scm_is_string (path))
+    sym = scm_string_to_symbol (path);
+  else if (scm_is_pair (path))
+    {
+      sym = scm_car (path);
+      path = scm_cdr (path);
+    }
 
   if (scm_is_symbol (sym))
     {
@@ -273,7 +295,13 @@ Lily_lexer::set_identifier (SCM name, SCM s)
 
       SCM mod = scm_car (scopes_);
 
-      scm_module_define (mod, sym, s);
+      if (scm_is_pair (path))
+       {
+         SCM prev = scm_module_lookup (mod, sym);
+         if (prev != SCM_UNDEFINED)
+           val = nested_property_alist (prev, path, val);
+       }
+      scm_module_define (mod, sym, val);
     }
   else
     programming_error ("identifier is not a symbol");