named references: fix double free.

[bison.git] / src / named-ref.h

diff --git a/src/named-ref.h b/src/named-ref.h
index 0f96e463ea848fc3343d495ad50a4270e34efd9b..46d9d8d42af8a5d4251c4fd739fbbec14a694cdf 100644 (file)
--- a/src/named-ref.h
+++ b/src/named-ref.h
@@ -37,6 +37,9 @@ typedef struct named_ref
 /* Allocate a named reference object. */
 named_ref *named_ref_new (uniqstr id, location loc);
 
+/* Allocate and return a copy.  */
+named_ref *named_ref_copy (const named_ref *r);
+
 /* Free a named reference object. */
 void named_ref_free (named_ref *r);