Thanks for sharing your input. I am able to do some pretty complex AST manipulation as stated initially. First results are very encouraging, I am getting an end to end translation successfully.
Regards, Vasan On 6/11/2011 7:31 PM, Trevor John Thompson wrote: > The short answer is "yes", you can manipulate the tree (before walking, not > during). > I am using tree adapter manipulations to reorganize the AST, and then handing > the tree to the standard tree walker. > > The only caution is that TreeIterator depends on parent pointers. I am > contemplating a version that does not have this dependency, so i can base my > trees on BaseTree, rather than CommonTree. > > On 2011 Jun 11, at 00:53, srinivasan karthikeyan pitchai wrote: > >> 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 >> >> >> >> List: http://www.antlr.org/mailman/listinfo/antlr-interest >> Unsubscribe: >> http://www.antlr.org/mailman/options/antlr-interest/your-email-address > -- > Trevor John Thompson (425) 246-4023 > net: ti...@me.com > Quidquid Latine dictum sit, altum videtur. > List: http://www.antlr.org/mailman/listinfo/antlr-interest Unsubscribe: http://www.antlr.org/mailman/options/antlr-interest/your-email-address -- You received this message because you are subscribed to the Google Groups "il-antlr-interest" group. To post to this group, send email to il-antlr-inter...@googlegroups.com. To unsubscribe from this group, send email to il-antlr-interest+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/il-antlr-interest?hl=en.
