[antlr-interest] newbi question : operator + any

[Jim Idle]

It is the only way you can do this, but I wonder if ANTLR is the right
choice for this situation. If you can afford the time to experiment
though, go for it.

Jim

> -----Original Message-----
> From: Marco Laponder [mailto:marco.laponder at kewill.com]
> Sent: Thursday, February 09, 2012 10:10 PM
> To: Jim Idle; antlr-interest at antlr.org
> Subject: RE: [antlr-interest] newbi question : operator + any
>
> This would mean the ANYTHING is a single character,so
> >abc
>
> Would mean 4 tokens? Is that the best way to go?
>
> Kind regards,
> Marco
>
> -----Oorspronkelijk bericht-----
> Van: antlr-interest-bounces at antlr.org
> [mailto:antlr-interest-bounces at antlr.org] Namens Jim Idle
> Verzonden: woensdag 8 februari 2012 19:54
> Aan: antlr-interest at antlr.org
> Onderwerp: Re: [antlr-interest] newbi question : operator + any
>
> Did you see my explanation of why you must use:
>
> ANYTHING : . ;
>
> And not use + or * with the . ?
>
> Jim
>
> > -----Original Message-----
> > From: antlr-interest-bounces at antlr.org [mailto:antlr-interest-
> > bounces at antlr.org] On Behalf Of Marco Laponder
> > Sent: Tuesday, February 07, 2012 10:58 PM
> > To: antlr-interest at antlr.org
> > Subject: Re: [antlr-interest] newbi question : operator + any
> >
> > Lets explain what I am trying to accomplish, maybe you can provide me
> > the most impressive grammars :-)
> >
> >
> >
> > I am trying to parse a filter string which filter on a column of a
> > table, so I need to know the operator. In my example I stated the '>'
> > but of course I would like to expand it to '<','>=' etc and alter on
> > even add parenthesis, 'and' and 'or' etc. But I would like to start
> > simple as I am new at ANTLR.
> >
> >
> >
> > Your sample does the trick, however looks hard to maintain, e.g.,
> when
> > I add the '<' to COMPARE I also need to add it to ANYTHING. (Well it
> > seems still more maintainable than a single regular expression no one
> > understands to do the trick ;-) )
> >
> >
> >
> > Kind regards,
> > Marco
> >
> >
> >
> > ________________________________
> >
> > Van: Marco Laponder
> > Verzonden: dinsdag 7 februari 2012 8:45
> > Aan: 'Gokulakannan Somasundaram'
> > CC: antlr-interest at antlr.org
> > Onderwerp: RE: [antlr-interest] newbi question : operator + any
> >
> >
> >
> > This still gives me the same error, any other ideas ? Of is antlr
> just
> > not appropriate for this ?
> >
> >
> >
> > Kind regards,
> >
> > Marco
> >
> >
> >
> > ________________________________
> >
> > Van: Gokulakannan Somasundaram [mailto:gokul007 at gmail.com]
> > Verzonden: maandag 6 februari 2012 16:56
> > Aan: Marco Laponder
> > CC: antlr-interest at antlr.org
> > Onderwerp: Re: [antlr-interest] newbi question : operator + any
> >
> >
> >
> > COMPARE : '>';
> >
> > ANYTHING : (~'>')(.)*;
> >
> > testExpression : COMPARE ANYTHING;
> >
> >
> >
> >
> >
> > Try this.
> >
> >
> >
> > Gokul.
> >
> > On Mon, Feb 6, 2012 at 8:30 PM, Marco Laponder
> > <marco.laponder at kewill.com> wrote:
> >
> > Hi All,
> >
> >
> >
> > I am trying to setup a very simple grammar, ik should be able to
> handle
> >
> >
> >
> > "> thiscouldbeanything"
> >
> >
> >
> > So I tried:
> >
> >
> >
> > COMPARE : '>';
> >
> > ANYTHING : (.)+;
> >
> > testExpression : COMPARE ANYTHING;
> >
> >
> >
> > but when generating java resources it gave me the error:
> >
> >
> >
> > "The following alternatives can never be matched: 1"
> >
> >
> >
> > The problems seems to be the ANYTHING, so how should I define a
> grammar
> > to be able to handle this ?
> >
> >
> >
> > Kind regards,
> >
> > Marco
> >
> >
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> >
> >
> >
> >
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