MLKSymbol: Override -hash.

2 files changed, 13 insertions, 1 deletions

diff --git a/MLKSymbol.h b/MLKSymbol.h
index 3aa2a1e..3cc9859 100644
--- a/MLKSymbol.h
+++ b/MLKSymbol.h
@@ -52,6 +52,7 @@
 // copying.  (The hack is called real_identity and it's an ivar of this
 // class.)  See the comment above copyWithZone: for why it even exists.
 -(BOOL) isEqual:(id)object;
+-(unsigned) hash;
 
 -(void) dealloc;
 @end
diff --git a/MLKSymbol.m b/MLKSymbol.m
index 73d418a..8a087cf 100644
--- a/MLKSymbol.m
+++ b/MLKSymbol.m
@@ -36,7 +36,10 @@
   MLKSymbol *copy = [MLKSymbol allocWithZone:zone];
   ASSIGN (copy->name, name);
   ASSIGN (copy->homePackage, homePackage);
-  ASSIGN (copy->real_identity, self);
+  if (real_identity)
+    ASSIGN (copy->real_identity, real_identity);
+  else
+    ASSIGN (copy->real_identity, self);
   return copy;
 }
 
@@ -79,6 +82,14 @@
                : self)));
 }
 
+-(unsigned) hash
+{
+  if (real_identity)
+    return [real_identity hash];
+  else
+    return [super hash];
+}
+
 -(void) dealloc
 {
   RELEASE (name);