[antlr-interest] Parser generation takes hours

Terence Parr parrt at cs.usfca.edu
Tue Jan 5 09:22:24 PST 2010


very strange. antlr has a fail-safe so it cannot do that.  what  
command line options do you use?  command line or ANTLWorks?
Ter
On Jan 5, 2010, at 6:52 AM, Jean-Pierre LAMBERT wrote:

> Hello everybody,
>
> I'm currently rewriting a LR parser to be used for ANTLR. As a result,
> ANTLR works literaly for hours before it outputs errors about my  
> grammar.
>
> My work is not finished; I have removed all left-recursions but I  
> still
> have to do left-factorisations. The problem being that since ANTLR  
> works
> for hours before I get the errors, it isn't very practical for me to  
> fix
> the grammar.
>
> Do you have any suggestions in this case? What could be done so that
> ANTLR would take only dozen of minutes? Is there something capital  
> that
> I missed about ANTLR and LL grammars? How should be written ANTLR  
> rules
> to avoid such a problem?
>
> Thanks in advance, any adice will be welcome.
>
> JP
>
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