[antlr-interest] strong error recovery

[Monty Zukowski]

Take a look at my parser filter example, 
http://www.codetransform.com/filterexample.html.  It requires a bit of 
work and understanding of ANTLR, explained in the article, but it lets 
you use a parser to pick out certain constructs and ignore everything 
else.

Monty

ANTLR & Java Consultant -- http://www.codetransform.com
ANSI C/GCC transformation toolkit -- 
http://www.codetransform.com/gcc.html
Embrace the Decay -- http://www.codetransform.com/EmbraceDecay.html

On Jul 28, 2004, at 5:29 AM, Neurosurg wrote:

> Hi all,
>
> the typical input for my parser contains a lot of
> unregular garbage between formulae. I have to recognize
> and extract valid formulae.
>
> Here goes an example.
>
>> From input :
>
>   asd3 a#$23+5)@tyu((5+7)*5pppp
>
> parser should extract:
>
> 3
> 23+5
> (5+7)*5
>
> Any chances with ANTLR engine?
>
> w.r.t. subject I have found already:
>
>   1. "filter=..." option (BTW, which is available for the Lexer only)
>
>   2. options "ignore", which was used in HTML parser example (also for
> Lexer only),
>
>   3. nice exception handling support for grammar
>
> but it doesn't look much helping still.
>
> Any good hints/comments?
>
> thanks a priori,
> Valery.
>
> P.S. I've found antlr just recently, before I've
> used lex/yacc and flex/bison.
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>



 
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