added broken copy method
--HG--
branch : trunk
diff --git a/jinja2/nodes.py b/jinja2/nodes.py
index 72edeb6..911f9fc 100644
--- a/jinja2/nodes.py
+++ b/jinja2/nodes.py
@@ -112,6 +112,30 @@
for result in child.find_all(node_type):
yield result
+ def copy(self):
+ """Return a deep copy of the node."""
+ result = object.__new__(self.__class__)
+ for field, value in self.iter_fields():
+ if isinstance(value, Node):
+ new_value = value.copy()
+ elif isinstance(value, list):
+ new_value = []
+ for item in new_value:
+ if isinstance(item, Node):
+ item = item.copy()
+ else:
+ item = copy(item)
+ new_value.append(item)
+ else:
+ new_value = copy(new_value)
+ setattr(result, field, new_value)
+ for attr in self.attributes:
+ try:
+ setattr(result, attr, getattr(self, attr))
+ except AttributeError:
+ pass
+ return result
+
def set_ctx(self, ctx):
"""Reset the context of a node and all child nodes. Per default the
parser will all generate nodes that have a 'load' context as it's the
diff --git a/jinja2/optimizer.py b/jinja2/optimizer.py
index 13b0fbc..e16961f 100644
--- a/jinja2/optimizer.py
+++ b/jinja2/optimizer.py
@@ -19,7 +19,6 @@
:copyright: Copyright 2008 by Christoph Hack.
:license: GNU GPL.
"""
-from copy import deepcopy
from jinja2 import nodes
from jinja2.visitor import NodeVisitor, NodeTransformer
from jinja2.runtime import subscribe, LoopContext
@@ -102,12 +101,12 @@
for loop, item in LoopContext(iterable, parent, True):
context['loop'] = loop.make_static()
assign(node.target, item)
- result.extend(self.visit(n, context)
- for n in deepcopy(node.body))
+ result.extend(self.visit(n.copy(), context)
+ for n in node.body)
iterated = True
if not iterated and node.else_:
- result.extend(self.visit(n, context)
- for n in deepcopy(node.else_))
+ result.extend(self.visit(n.copy(), context)
+ for n in node.else_)
except nodes.Impossible:
return node
finally: