X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Flily-lexer.cc;h=c72ff8fc129eca056015f930b7a94c02d528902a;hb=29af9bda720e7624494abbacb9895ac7d63b5221;hp=39aeb78dd14c0fe9cd9bce93f50cb365f748e5c3;hpb=e8828403660d9289e71f00021dbc8ef07f03d18d;p=lilypond.git

diff --git a/lily/lily-lexer.cc b/lily/lily-lexer.cc
index 39aeb78dd1..c72ff8fc12 100644
--- a/lily/lily-lexer.cc
+++ b/lily/lily-lexer.cc
@@ -96,6 +96,7 @@ Lily_lexer::Lily_lexer (Sources *sources, Lily_parser *parser)
   scopes_ = SCM_EOL;
   error_level_ = 0;
   is_main_input_ = false;
+  main_input_level_ = 0;
   start_module_ = SCM_EOL;
   extra_tokens_ = SCM_EOL;
   smobify_self ();
@@ -105,7 +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;
@@ -118,8 +120,11 @@ Lily_lexer::Lily_lexer (Lily_lexer const &src, Lily_parser *parser)
 
   error_level_ = 0;
   is_main_input_ = src.is_main_input_;
+  main_input_level_ = 0;
 
   extra_tokens_ = SCM_EOL;
+  if (unsmob_input (override_input))
+    override_input_ = *unsmob_input (override_input);
 
   smobify_self ();
 
@@ -173,7 +178,7 @@ Lily_lexer::set_current_scope ()
 }
 
 int
-Lily_lexer::lookup_keyword (string s)
+Lily_lexer::lookup_keyword (const string &s)
 {
   return keytable_->lookup (s.c_str ());
 }
@@ -212,7 +217,7 @@ Lily_lexer::lookup_identifier_symbol (SCM sym)
 }
 
 SCM
-Lily_lexer::lookup_identifier (string name)
+Lily_lexer::lookup_identifier (const string &name)
 {
   return lookup_identifier_symbol (ly_symbol2scm (name.c_str ()));
 }
@@ -231,13 +236,13 @@ Lily_lexer::start_main_input ()
 }
 
 void
-Lily_lexer::new_input (string str, string d, Sources *ss)
+Lily_lexer::new_input (const string &str, string d, Sources *ss)
 {
   Includable_lexer::new_input (str, d, ss);
 }
 
 void
-Lily_lexer::new_input (string str, Sources *ss)
+Lily_lexer::new_input (const string &str, Sources *ss)
 {
   if (is_main_input_ && be_safe_global)
     {
@@ -333,6 +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 ()
 {