[antlr-interest] AST rewrite
srinivasan karthikeyan pitchai
srinivasan.karthikeyan.pitchai at oracle.com
Sat Jun 11 00:53:34 PDT 2011
Hi Gurus,
I'm a novice using ANTLR for a development project. I am at a stage
where I need to rewrite AST so that the transformed AST renders itself
more easy for me to walk and emit the translation that I need. In this
context I've a concept question.
In general, can I use the *same* tree adapter, used by the
InputNodeStream used by the walker, in a java method that I code to
restructure the tree without using the rewrite rule? That is can I add,
delete, replace nodes at will in the source tree? I am looking at this
option as I need to move up a subtree from deep down to a much higher
level. In particular would manipulating the source tree mess up the
iterator used by the ANTLR AST walker to parse the tree?
(eg) Just want to know if I can effect this in JAVA. I am sure we can
make it happen using rewrite rule. However I want to conceptually know
if what I desire above is a feasibility or it it a totally wrong approach.
^(ROOT a b ^(ROOT c d ^(ROOT e f g)))
I need to restructure the tree like, say,
^(ROOT a b ^(ROOT c d ) ^(ROOT e f g))
Based on your input I need to chalk the future course of my coding.
Thanks in advance.
Regards,
Vasan
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