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[bison.git] / src / output.c

diff --git a/src/output.c b/src/output.c
index 60b79790037936f19295230cd0d0481ad6e115d4..34d6b06ae840305bd98bcf1547af8b41e3a25eb3 100644 (file)
--- a/src/output.c
+++ b/src/output.c
@@ -1075,7 +1075,8 @@ output_master_parser (void)
 
 #define MUSCLE_INSERT_PREFIX(Key, Value)                               \
 {                                                                      \
-  obstack_fgrow2 (&muscle_obstack, "%s%s", spec_name_prefix, Value);   \
+  obstack_fgrow2 (&muscle_obstack, "%s%s",                             \
+                 spec_name_prefix ? spec_name_prefix : "yy", Value);   \
   obstack_1grow (&muscle_obstack, 0);                                  \
   muscle_insert (Key, obstack_finish (&muscle_obstack));               \
 }
@@ -1091,7 +1092,7 @@ prepare (void)
   MUSCLE_INSERT_INT ("final", final_state);
   MUSCLE_INSERT_INT ("maxtok", max_user_token_number);
   MUSCLE_INSERT_INT ("error-verbose", error_verbose);
-  MUSCLE_INSERT_STRING ("prefix", spec_name_prefix);
+  MUSCLE_INSERT_STRING ("prefix", spec_name_prefix ? spec_name_prefix : "yy");
 
   MUSCLE_INSERT_INT ("nnts", nvars);
   MUSCLE_INSERT_INT ("nrules", nrules);
@@ -1127,7 +1128,27 @@ yystype;\n\
 
   if (!pure_parser)
     fprintf (out, "\nextern YYSTYPE %slval;\n",
-            spec_name_prefix);
+            spec_name_prefix ? spec_name_prefix : "yy");
+
+  if (locations_flag)
+    {
+      fputs ("\n\n", out);
+      fprintf (out, "\
+#ifndef YYLTYPE\n\
+typedef struct yyltype\n\
+{\n\
+  int first_line;\n\
+  int first_column;\n\
+  int last_line;\n\
+  int last_column;\n\
+} yyltype;\n\
+# define YYLTYPE yyltype\n\
+#endif\n");
+      if (!pure_parser)
+       fprintf (out, "\nextern YYLTYPE %slloc;\n",
+                spec_name_prefix ? spec_name_prefix : "yy");
+    }
+
   if (semantic_parser)
     {
       int i;