X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/35f61cb998a30de542f554cd8c47a445af0ef886..e89a22bfab22e4d2ee73be49dcb66b51f8d0e892:/src/gram.h

diff --git a/src/gram.h b/src/gram.h
index 531d1d9a..e26582fe 100644
--- a/src/gram.h
+++ b/src/gram.h
@@ -59,6 +59,8 @@
 
    RULE_TABLE[R].line -- the line where R was defined.
 
+   RULE_TABLE[R].useful -- TRUE iff the rule is used.
+
    The right hand side is stored as symbol numbers in a portion of
    RITEM.
 
@@ -119,6 +121,7 @@ typedef struct rule_s
   short precsym;
   short assoc;
   short line;
+  bool useful;
 } rule_t;
 
 extern struct rule_s *rule_table;
@@ -144,4 +147,12 @@ extern int pure_parser;
 /* ERROR_TOKEN_NUMBER is the token number of the error token.  */
 
 extern int error_token_number;
+
+
+/* Dump RITEM for traces. */
+void ritem_print PARAMS ((FILE *out));
+
+/* Return the size of the longest rule RHS.  */
+size_t ritem_longest_rhs PARAMS ((void));
+
 #endif /* !GRAM_H_ */