[antlr-interest] Re: Representing state in lexer

[Anthony W Youngman]

What is it non-deterministic with? In other words, what other construct
recognised by the lexer could a PATTERN be confused with?

You will have to define an unquoted pattern as a subset of that other
construct, and then use $settype to change the type to PATTERN if that's
what you've got.

Cheers,
Wol

-----Original Message-----
From: cgodfrey86 [mailto:cgodfrey at epnet.com] 
Sent: 14 May 2003 15:56
To: antlr-interest at yahoogroups.com
Subject: [antlr-interest] Re: Representing state in lexer


Thank you for the suggestion.

The main issue that I am running into with this is that a PATTERN 
token can appear either inside or outside of quotes - so I won't 
recognize a PATTERN outside of quotes. When I try and define it 
without quotes, I have lexical nondeterminism

PATTERN : QUOTE (ALLOWCHARS)+ QUOTE ;





 

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