[antlr-interest] Resolving conflict between keyword and identifier

[John Green]

In my lexer I use:

ID
options {
        testLiterals = true;
}
	:	('a'..'z'|'_'|'$')
	etc.

and then for the keyword rule I have a list of token types rather than a
list of string literals.

Works for me, with many hundreds of keywords. (Of course, make the keywords
list big enough and you can run into the old "virtual memory exhausted"
error from G++, but that's another issue)

HTH
John Green
www.joanju.com


> -----Original Message-----
> From: SAGAR BIYANI [mailto:sagarbiyani at yahoo.com]
> Sent: Sunday, February 10, 2002 7:41 PM
> To: antlr-interest at yahoogroups.com
> Subject: [antlr-interest] Resolving conflict between keyword and
> identifier
>
>
> Hi,
>
> I am writing grammar for SQL. Trying to resolve
> conflict between keyword and identifier through the
> following rules:
>
> keyword: "access" |"admin" ... ;
>
> id: ID |keyword;
>
> The above rule works only if the keywords defined in
> the keyword rule is less. If it exceeds above certain
> limit(approx 100), ANTLR generates wrong code in the
> parsers (starts ignoring predicates) and hence the
> whole thing is not working. Anybody know how to
> resolve this problem?
>
> Thanks in advance.
>
> -Sagar
>
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