1 files changed, 21 insertions, 1 deletions
diff --git a/tool/ytab.sed b/tool/ytab.sed
index d75367abed..92f8218202 100755
--- a/tool/ytab.sed
+++ b/tool/ytab.sed
@@ -5,6 +5,26 @@ i\
 a\
 #endif
 }
-s/^[ 	]*\(yyerror[ 	]*([ 	]*parser,\)/parser_\1/
+/^yydestruct/,/#endif/{
+  /^yydestruct/{
+    /parser/!{
+      h
+      s/^/ruby_parser_&/
+      s/)$/, parser)/
+      /\*/s/parser)$/struct parser_params *&/
+    }
+  }
+  /^#endif/{
+    x
+    /^./{
+      i\
+    struct parser_params *parser;
+      a\
+#define yydestruct(m, t, v) ruby_parser_yydestruct(m, t, v, parser)
+    }
+    x
+  }
+}
+s/^\([ 	]*\)\(yyerror[ 	]*([ 	]*parser,\)/\1parser_\2/
 s!^ *extern char \*getenv();!/* & */!
 s/^\(#.*\)".*\.tab\.c"/\1"parse.c"/