* hash.c (rb_hash_clear): use st_clear() unless iterating.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@13125 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,4 +1,6 @@
-Tue Aug 21 13:43:49 2007  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+Tue Aug 21 13:46:59 2007  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* hash.c (rb_hash_clear): use st_clear() unless iterating.
 
 	* st.c (struct st_table_entry): add new members, fore and back, to
 	  iterate in inserted order.

hash.c

@@ -842,7 +842,10 @@ rb_hash_clear(VALUE hash)
 {
     rb_hash_modify(hash);
     if (RHASH(hash)->tbl->num_entries > 0) {
-	rb_hash_foreach(hash, clear_i, 0);
+	if (RHASH(hash)->iter_lev > 0)
+	    rb_hash_foreach(hash, clear_i, 0);
+	else
+	    st_clear(RHASH(hash)->tbl);
     }
 
     return hash;