[antlr-interest] How to remove this kind of warning

[Jim Idle]

On Fri, 2008-09-05 at 22:15 +0800, Ronghui Yu wrote:
> I would like to have it as a lexer rule, but in my parser, there is a
> Floating_Point_Constant like
>  
> Floating_Point_Constant:
>    ('0'..'9')+ '.' ('0'..'9')* ('e'|'E')?;
> 
> Then when an IP appears in the stream, it is divided into serveral
> floating point tokens, but not a complete IP token
> 
> Then I rewrite this rule to deal with double cases
> 


fragment
IP_Address : ;


> Floating_Point_Constant:
> 
>   ('0'..'9')+ '.' 
> 
>   (
> 
>        (('0'..'9')+ '.' ('0'..'9')+ '.' ('0'..'9')+) => ('0'..'9')+
> '.' ('0'..'9')+ '.' ('0'..'9')+ {$type=IP_Address;}
> 
>        |
> 
>        ('0'..'9')* ('e'|'E')?;
> 
>   )
> 
> ;
> 
> This rule can deal with both cases well, but I need to define a token
> IP_Address first, then comes the story.
> 
> 
> If I define two rules for floating point and ip address respectively,
> seems one of them doesn't work properly.
> 
>  
> 
> 
> ______________________________________________________________________
> From: Jim Idle [mailto:jimi at temporal-wave.com]
> Sent: 2008-9-5 (星期五) 21:59
> To: Ronghui Yu
> Cc: antlr-interest at antlr.org
> Subject: Re: [antlr-interest] How to remove this kind of warning
> 
> 
> On Fri, 2008-09-05 at 17:25 +0800, Ronghui Yu wrote: 
> 
> >  no lexer rule corresponding to token: IP_Address 
> > Everytime when I define a token in token section, it always issues
> > this kind of warning. 
> > I hate warnings, is there any way to remove it?
> 
> 
> Don't define it in the tokens section, but as a lexer rule and it will
> go away.
> 
> Jim 
> 
> > Thanks! 
> > ==============================
> > Regards,
> > Ronghui Yu
> > Sierra Atlantic 
> > 
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