[antlr-interest] trace as an grammar and rule option
mzukowski at yci.com
mzukowski at yci.com
Tue Sep 17 14:14:57 PDT 2002
FYI there are separate options for lexer, parser and tree parser.
They are:
-trace
-traceLexer
-traceParser
-traceTreeWalker
Rule level might be nice, but I've never needed it.
Monty
> -----Original Message-----
> From: richardhensley99 [mailto:richard.hensley at mckesson.com]
> Sent: Tuesday, September 17, 2002 2:08 PM
> To: antlr-interest at yahoogroups.com
> Subject: [antlr-interest] trace as an grammar and rule option
>
>
> Hello,
>
> I have a situation where I can only reproduce a bug by testing my
> grammar on a file that is about 20k lines long. I used antlr and
> turned on -traceParser, and this looks like it will generate the
> output I need, however it is taking a very long time to run...
>
> I was wondering if anybody has ever thought about a trace option at
> the grammar and at the rule level?
>
> I've been poking around in the antlr source, and I think it would be
> implemented very much like the defaultErrorHandler option. It seems
> that the touch points would be the following:
>
> MakeGrammar.java is the only place the creates rule blocks. When it
> creates them, it copies the defaultErrorHandler option from the
> grammar. I think the same rules would apply for a trace option.
>
> JavaCodeGenerator.java checks the grammar for the traceRules flag.
> This would be changed to test the rule block currently in context.
>
> Grammar.java the setOption method would be modified to allow a trace
> option.
>
> RuleBlock.java the setOption method would be modified to allow a
> trace option.
>
> Are there any other touch points that I missed?
>
> I think this would be useful because I would be able to reduce the
> number of rules that are trace that I really don't care about. At
> this time, my test for debugging takes enough time that I was able to
> research this change and start on the changes.
>
> From my research, I think the changes would allow the option in
> lexers, parsers, and tree parsers.
>
> If anybody thinks this is useful, I would be more that willing to
> submit the source files, or a diff patch back to the list. I'm using
> 2.7.2a2, so I think this is fairly recent.
>
> Richard
>
>
>
>
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