[antlr-interest] Parsing documentation comments (with nesting!) (v3)
Rick Mann
rmann at latencyzero.com
Wed Feb 21 19:49:07 PST 2007
On Feb 21, 2007, at 19:36 , Rick Mann wrote:
> COMMENT
> : '/*' ( options {greedy=false;} : . )* '*/'
> ;
>
> I've tried this, and it works fine, but I can't get at the text of
> the comment. I tried labeling the subrule, but it didn't like that.
> So I tried this:
>
> COMMENT
> : '/*'! COMMENTTEXT '*/'! { System.out.println("Found a
> comment [" + $COMMENTTEXT.text + "]"); }
> ;
>
> fragment
> COMMENTTEXT
> options
> {
> greedy = false;
> }
> : .*
> ;
>
> But I get "The following alternatives are unreachable: 1".
I noticed one error in the above: the '*" should go after
"COMMENTTEXT" in the COMMENT rule, but then I can't reference
$COMMENTTEXT (I get other errors).
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