Clear cyclic references in the parser and the emitter to avoid extra GC calls.

git-svn-id: http://svn.pyyaml.org/pyyaml/trunk@377 18f92427-320e-0410-9341-c67f048884a3

1 files changed, 5 insertions, 0 deletions

diff --git a/lib3/yaml/parser.py b/lib3/yaml/parser.py
index c147dd6..13a5995 100644
--- a/lib3/yaml/parser.py
+++ b/lib3/yaml/parser.py
@@ -86,6 +86,11 @@ class Parser:
         self.marks = []
         self.state = self.parse_stream_start
 
+    def dispose(self):
+        # Reset the state attributes (to clear self-references)
+        self.states = []
+        self.state = None
+
     def check_event(self, *choices):
         # Check the type of the next event.
         if self.current_event is None: