* src/reader.c (parse_union_decl): Output yystype/YYSTYPE as we do

[bison.git] / src / reader.c

diff --git a/src/reader.c b/src/reader.c
index 4e84c77466fbb4c4a1fc4d54b5b61aa0d9ce5023..5cfa424bc7f871949e0d54c1b1b9a31d77d04886 100644 (file)
--- a/src/reader.c
+++ b/src/reader.c
@@ -711,6 +711,13 @@ parse_union_decl (void)
 {
   int c;
   int count = 0;
+  const char *prologue = "\
+#ifndef YYSTYPE\n\
+typedef union";
+  const char *epilogue = "\
+ yystype;\n\
+# define YYSTYPE yystype\n\
+#endif\n";
 
   if (typed)
     complain (_("multiple %s declarations"), "%union");
@@ -723,9 +730,9 @@ parse_union_decl (void)
   else
     obstack_1grow (&attrs_obstack, '\n');
 
-  obstack_sgrow (&attrs_obstack, "typedef union");
+  obstack_sgrow (&attrs_obstack, prologue);
   if (defines_flag)
-    obstack_sgrow (&defines_obstack, "typedef union");
+    obstack_sgrow (&defines_obstack, prologue);
 
   c = getc (finput);
 
@@ -760,9 +767,9 @@ parse_union_decl (void)
          count--;
          if (count <= 0)
            {
-             obstack_sgrow (&attrs_obstack, " YYSTYPE;\n");
+             obstack_sgrow (&attrs_obstack, epilogue);
              if (defines_flag)
-               obstack_sgrow (&defines_obstack, " YYSTYPE;\n");
+               obstack_sgrow (&defines_obstack, epilogue);
              /* JF don't choke on trailing semi */
              c = skip_white_space ();
              if (c != ';')
@@ -1955,7 +1962,6 @@ reader (void)
   /* Read the declaration section.  Copy %{ ... %} groups to
      TABLE_OBSTACK and FDEFINES file.  Also notice any %token, %left,
      etc. found there.  */
-  obstack_1grow (&table_obstack, '\n');
   obstack_fgrow3 (&table_obstack, "\
 /* %s, made from %s\n\
    by GNU bison %s.  */\n\