[antlr-interest] Shortcircuiting the tree parser

[Johannes Luber]

Carter Cheng schrieb:
> Thanks everyone for the replies to my previous post. I have been wondering about one additional point
> when it comes to tree parsers. For alot of AST's when doing semantic
analysis you tend to have alot
> of separable distinct tasks which only need parts of the constructed
tree. I am curious if there is
> a way to underspecify the tree grammar and tell it explicitly not to
descend certain portions of the
> AST and only focus on certain parts. I apologize if this has been
addressed before.
> 
> Thanks in advance,
> 
> Carter.
> 
Well, you could use the . to mark certain nodes and subtrees as "just
have to be here".

Johannes