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.
