[antlr-interest] Reg Multi-line comments
Michael
micha-1 at fantasymail.de
Thu Jul 16 04:35:00 PDT 2009
Am Thursday 16 July 2009 12:14:55 schrieb Gokulakannan Somasundaram:
> Hi,
> I am trying to filter out multi-line comments, for which i am using the
> following Token definition (provided in antlr.org)
> ML_COMMENT
>
> : '/*' ( options { greedy = false; } : .* ) '*/' { skip(); };
>
I have done it like this:
in the lexer I added a member openComment:
@member {
boolean openComment = false;
//override nextToken:
@Override
public Token nextToken() {
Token t = super.nextToken();
if (t == Token.EOF_TOKEN && openComment) {
System.err.println("gotcha!");
}
return t;
}
}
change your comment rule :
ML_COMMENT
@init { openComment = true: }
: '/*' ( options { greedy = false; } : .* ) '*/' { openComment = false;
skip(); };
don't know if this is nice, but it works :-)
Michael
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