grammar: warn about unused precedence for symbols

[bison.git] / src / uniqstr.c

diff --git a/src/uniqstr.c b/src/uniqstr.c
index f2954443e9c9e9a3140fd9766f5905d38d3f050c..161b24d4ea957ef8cbc1d3ee4b10a87ef4af2a14 100644 (file)
--- a/src/uniqstr.c
+++ b/src/uniqstr.c
@@ -1,6 +1,6 @@
 /* Keep a unique copy of strings.
 
-   Copyright (C) 2002-2005, 2009-2012 Free Software Foundation, Inc.
+   Copyright (C) 2002-2005, 2009-2013 Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
@@ -103,7 +103,17 @@ uniqstr_print_processor (void *ustr, void *null ATTRIBUTE_UNUSED)
   return uniqstr_print (ustr);
 }
 
-\f
+
+int
+uniqstr_cmp(uniqstr l, uniqstr r)
+{
+  return (l == r ? 0
+          : !l ? -1
+          : !r ? +1
+          : strcmp (l, r));
+}
+
+
 /*-----------------------.
 | A uniqstr hash table.  |
 `-----------------------*/
@@ -120,6 +130,7 @@ hash_uniqstr (void const *m, size_t tablesize)
   return hash_string (m, tablesize);
 }
 
+
 /*----------------------------.
 | Create the uniqstrs table.  |
 `----------------------------*/