[antlr-interest] Is it possible that I found a bug on my first day using Antlr?

Terence Parr parrt at cs.usfca.edu
Wed Jun 30 12:55:17 PDT 2010


/** foo */ is javadoc not just a comment. one per rule :)
T
On Jun 30, 2010, at 12:26 PM, Zeafla, Larry wrote:

> I started using Antlr today.  Being cautious, I tried to write a parser
> for a tiny grammar by commenting out almost everything from the online
> demo and then adding my code incrementally.  I got errors that can be
> reduced to this grammar file:
> 
>        grammar comment_test;
>        /** Comment 1 */
>        /** Comment 2 */
>        INT         :  '0'..'9'+ ;
> 
> 
> 
> This generated the error message:
> 
>         syntax error: antlr: comment_test.g:3:1: unexpected token: /**
> Comment 2 */
> 
> 
> 
> Changing either of the comment start characters from /** to /* makes the
> error go away.  It appears that Antlr will not accept back to back
> comments in a grammar file if both start with /**
> 
>    Larry
> 
> 
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