[antlr-interest] ANTLRv3 emits literal DOWN instead of Token.Down
Terence Parr
parrt at cs.usfca.edu
Sun Dec 9 15:26:29 PST 2007
Hi Kalen,
Well, this is more of a "don't allow ^(...) matching" in a nontree
parser bug.
TreeParser defines:
public static final int DOWN = Token.DOWN;
so it will compile no problem.
Adding issue
http://www.antlr.org:8888/browse/ANTLR-198
Ter
On Dec 3, 2007, at 5:53 PM, Kalen Petersen wrote:
> Been using antlr for a few weeks now and it's great, but today I
> stumbled across this bug.
> The attached grammar produces invalid code in both java and C#
> targets. In the lookahead, it emits "DOWN" instead of "Token.Down"
> as in the recognition stage. This is on line 37 in
> DownBugParser.java.
> This is observed with the version of antlr included in ANTLRWorks
> 1.1.5.
> Thanks,
>
> --Kalen
> grammar DownBug;
>
> bug_rule
> : ^('+' bug_rule)
> | '+' bug_rule
> | ZERO
> ;
>
> ZERO
> : '0'+
> ;
>
> WS : '\n' {$channel=HIDDEN;}
> ;
More information about the antlr-interest
mailing list