Midi2ly: refactoring: introduce class Staff.

[lilypond.git] / lily / lily-parser-scheme.cc

diff --git a/lily/lily-parser-scheme.cc b/lily/lily-parser-scheme.cc
index 2b968b46c00c124baef36f283771d31705c6784c..6a5f8d791ba5d6ca880ee9fbee579f441af430d0 100644 (file)
--- a/lily/lily-parser-scheme.cc
+++ b/lily/lily-parser-scheme.cc
@@ -1,7 +1,7 @@
 /*
   This file is part of LilyPond, the GNU music typesetter.
 
-  Copyright (C) 2005--2010 Han-Wen Nienhuys <hanwen@xs4all.nl>
+  Copyright (C) 2005--2011 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
@@ -200,7 +200,11 @@ LY_DEFINE (ly_parser_parse_string, "ly:parser-parse-string",
   Lily_parser *parser = unsmob_lily_parser (parser_smob);
   LY_ASSERT_TYPE (scm_is_string, ly_code, 2);
 
-  parser->parse_string (ly_scm2string (ly_code));
+  if (!parser->lexer_->is_clean ())
+    parser->parser_error (_ ("ly:parser-parse-string is only valid with a new parser."
+                            "  Use ly:parser-include-string instead."));
+  else
+    parser->parse_string (ly_scm2string (ly_code));
 
   return SCM_UNSPECIFIED;
 }