[antlr-interest] Problem with lexer rule

[mzukowski at yci.com]

That should work just like you have it written.  What is going wrong?

Monty

-----Original Message-----
From: carstenzerbst [mailto:carsten.zerbst at atlantec-es.com] 
Sent: Thursday, December 18, 2003 2:11 AM
To: antlr-interest at yahoogroups.com
Subject: [antlr-interest] Problem with lexer rule

Hello,

I'm just using antlr for step physical files and am pretty impressed
by the tool. I have a little problem to distinguish string like
'abcd.'


STRING : 
       APOSTROPHE! ( SPECIAL | DIGIT | SPACE | LOWER | UPPER  | "''" 
| REVERSE_SOLIDUS  )* APOSTROPHE!
       {Part21File.lexerLog.debug("found a string " + getText());} ;

and enumerations like '.UNUSED.'

ENUMERATION 
    options { paraphrase="an enumeration";} :
     '.'! UPPER ((UPPER | DIGIT )*) '.'!
     {Part21File.lexerLog.debug("found an enumeration " +
getText());} ;

How could I tell the string rule that tokens starting and ending with
a point (member of special) and including only uppercase and digits
are enumerations ?

Thanks, Carsten 



 

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