[antlr-interest] Fwd: Pruning the Parse Tree

[Terence Parr]

On Mar 11, 2008, at 10:50 AM, Andy Tripp wrote:

> Aaron Armstrong wrote:
>>
>> 2. The default AST is flat.  Basically, I get no more information  
>> than what the lexer would give me.  (I don't know why this is, but  
>> ANTLR is not my design).
>>
> I've always thought it was a bit odd that the default AST is flat.  
> (Don't bother explaining the reasoning
> to me, I've already heard the explanation, and I still think it's  
> odd). At least an option to say
> "make the AST match the parse tree" would be nice, as opposed to  
> forcing me to sprinkle
> "^" characters in my grammar.

Uh, making the AST look like a parse tree is, um, a parse tree, which  
ANTLR can build for you automatically now no problem.

Ter