Doc: extend description of LilyPond code blocks (3098)

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

diff --git a/lily/lily-lexer.cc b/lily/lily-lexer.cc
index c529da7c43a1efaa97d41b1ec336185b44358ccc..c196808a2fef49b9a3c62ec0cafd964477021bfe 100644 (file)
--- a/lily/lily-lexer.cc
+++ b/lily/lily-lexer.cc
@@ -106,7 +106,8 @@ Lily_lexer::Lily_lexer (Sources *sources, Lily_parser *parser)
   chordmodifier_tab_ = scm_make_vector (scm_from_int (1), SCM_EOL);
 }
 
-Lily_lexer::Lily_lexer (Lily_lexer const &src, Lily_parser *parser)
+Lily_lexer::Lily_lexer (Lily_lexer const &src, Lily_parser *parser,
+                        SCM override_input)
   : Includable_lexer ()
 {
   parser_ = parser;
@@ -122,6 +123,8 @@ Lily_lexer::Lily_lexer (Lily_lexer const &src, Lily_parser *parser)
   main_input_level_ = 0;
 
   extra_tokens_ = SCM_EOL;
+  if (unsmob_input (override_input))
+    override_input_ = *unsmob_input (override_input);
 
   smobify_self ();
 
@@ -335,6 +338,13 @@ Lily_lexer::here_input () const
   return Input (*lexloc_);
 }
 
+Input const &
+Lily_lexer::override_input (Input const &in) const
+{
+  return override_input_.get_source_file ()
+    ? override_input_ : in;
+}
+
 void
 Lily_lexer::prepare_for_next_token ()
 {