[antlr-interest] Can't recoginze a file start with HIDDEN lexer since 3.1b1

[Jim Idle]

On Wed, 2008-08-27 at 15:39 +0800, Ronghui Yu wrote:
> We're developing several SQL parsers for different major DBMS, before
> 3.1b1 was available, we finished development based 3.0.1, and run a
> bunch of *.sql files with a great amout of SQL statements againt this
> parser. Everything went well at that time.
>  
> Then when 3.1b1 was available, we switched to it with exactly the same
> grammar code, and run the same *sql files. Something different
> happened, all *.sql files start with empty line or lines, SQL comment
> line or lines, could not pass the test. Now when 3.1 available, the
> situation is the same as that of 3.1b1. And I learnt that if the file
> start with lexers with HIDDEN channel, it would fail against the
> test. 
>  
> I wonder if anyone else ever comes across the same situtation? And if
> yes, any suggestion to solve it?
>  

I'll take a look - maybe there is some issue with one of the bug fixes.
Do you have some small example to reproduce this? My own SQL parsers all
work correctly so thre must be some particular aspect fo your grammars
that makes this happen.

> By the way, I am using the C target.

Jim
> 
> 
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