I have a tree parser which output a new ast (tree rewriting).
The parser has attached some NodeData to some tree nodes, and one of my tree
rewrite rules should just copy this node, like:
rule_x: NODE<NodeData> ; /* should copy NodeData, but doesn't */
If I do this then the node data is not duplicated.
If have to do:
rule_x: NODE {
NodeData d = (NodeData)$NODE;
} -> NODE<NodeData>[d]
;
I thought the incoming data is copied in case of an empty rule (see
Tree construction during tree parsing in
http://www.antlr.org/wiki/display/ANTLR3/Tree+construction ) ??
cheers
Michael
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