Hello,
I'm working on a tree grammar that needs to perform some tree rewriting
for a further tree parsing phase.
My question is, is it possible to do something like this (semi pseudo-code):
r : ^(SOME_NODE x y)
-> ^(SOME_NODE x y
{ // action
// for loop iterates over a data structure getting info
and inserting it into a new subtree
for(every item in data structure) {
add new subtree ^(MY_NEW_SUBTREE item)
}
}
) // tree rewrite ends here
;
where the rewritten tree will have a new subtree created from each
iteration of the loop. I suppose what I want is to dynamically build new
subtrees of the resulting rewritten tree for the rule.
The above is invalid ANTLR syntax but I'm wondering whether this is
possible somehow. I would rather use ANTLR's friendly tree building
syntax as above (i.e. ^(MY_NEW_SUBTREE item) ); I don't want to have to
'manually' build the tree inside the action (using ANTLR's tree building
API) if I can help it. There might even be a simpler method of doing
this that I've missed...
Thanks,
Stephen
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