[antlr-interest] ambiguity ?

mzukowski at yci.com mzukowski at yci.com
Thu Apr 18 10:03:36 PDT 2002


This is antlr's linear approximate lookahead at work.  Please see the FAQ
about it.

Monty

> -----Original Message-----
> From: Lloyd Dupont [mailto:lloyd at galador.net]
> Sent: Thursday, April 18, 2002 12:33 AM
> To: antlr
> Subject: [antlr-interest] ambiguity ?
> 
> 
> why these rules ares ambiguous (in a Lexer) ?
> #-------------------
> DIV_ASSIGN  : "/=" ;
> 
> SL_COMMENT :
>     ( "//" | '#' )  
>     (~('\n'|'\r'))* ('\n'|'\r'('\n')?)
>      ;
> #-------------------
> while these ones are not !
> #-------------------
> DIV_ASSIGN  : "/=" ;
> 
> SL_COMMENT_1 :
>      "//"   (~('\n'|'\r'))* ('\n'|'\r'('\n')?)
>      ;
> 
> SL_COMMENT_2 : 
>     '#' 
>     (~('\n'|'\r'))* ('\n'|'\r'('\n')?)
>     ;
> 
> #-------------------
> 
> ????
> 
> 
>  
> 
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