Changeset 142 for pyyaml/trunk/lib/yaml/constructor.py

Timestamp:

04/18/06 13:15:54 (7 years ago)

Author:

xi

Message:

Add support for recursive nodes to Composer. Constructor does not support recursive objects though.

File:

• pyyaml/trunk/lib/yaml/constructor.py (modified) (4 diffs)

pyyaml/trunk/lib/yaml/constructor.py

@@ -30 +30 @@
     def __init__(self):
         self.constructed_objects = {}
+        self.recursive_objects = {}
 
     def check_data(self):
@@ -48 +49 @@
         data = self.construct_object(node)
         self.constructed_objects = {}
+        self.recursive_objects = {}
         return data
 
@@ -53 +55 @@
         if node in self.constructed_objects:
             return self.constructed_objects[node]
+        if node in self.recursive_objects:
+            raise ConstructorError(None, None,
+                    "found recursive node", node.start_mark)
+        self.recursive_objects[node] = None
         constructor = None
         if node.tag in self.yaml_constructors:
@@ -80 +86 @@
         data = constructor(node)
         self.constructed_objects[node] = data
+        del self.recursive_objects[node]
         return data