[antlr-interest] Re: Antlr grammar to parse Java classfile?

Terence Parr parrt at jguru.com
Thu Dec 6 16:39:29 PST 2001

On Thursday, December 6, 2001, at 04:32  PM, John D. Mitchell wrote:
> IMHO, this gets to the more general point of allowing at least some 
> amount
> of grammar analysis and parser/walker generation at run-time rather than
> the current "static" analysis.  This would be at least nasty in the 
> current
> system but in the predicated v3.0, I don't think it would be that 
> onerous
> to support this since it's basically just the equivalent of run-time 
> loop
> unrolling in a JITC.

Yeah, I was wondering if an "interpreted" version of ANTLR might be 
nifty that did all analysis on demand.  It's basically much easier to 
say "which branches can I take given these k tokens" than "compute the 
world of all possible k-tuples that predict each path".  Once it 
computed the analysis, it could cache that and reuse upon next 
iteration.  It would be like a JIT.   Yep. :)

Chief Scientist & Co-founder, http://www.jguru.com
Creator, ANTLR Parser Generator: http://www.antlr.org


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