[antlr-interest] Two questions about antlr3 syntax

[Oliver Zeigermann]

2005/10/27, shmuel siegel <antlr at shmuelhome.mine.nu>:
> 1) In antlr2 I used EOT to indicate that the entire input file must
> match my syntax. What has replaced this in antlr3.
> example
>      document : contextSection (eventSection)? (handlerList)?
> (settingSection)* EOT!;

AFAIK the EOT is no longer required. The only thing you will need is
at least one start rule. A start rule is called by no other rule.

> 2) in antlr2 we used labels to create referenceable items. The read me
> notes say that we should use an equal sign instead of a colon but
> neither syntax works for me in antlr3. what do I need to do?
>
> example:
>     LINE_DIRECTIVE : a="#line" WS line=NUMBER WS (filename=STRING)?
>         {
>             $setType(Token.SKIP);
>             setLine(Integer.parseInt(line.getText())-1);
>             if(filename!=null)
>             {
>                 currentFilename = filename.getText();
>                 setFilename(currentFilename);
>             }
>         }
>         ;

I suppose this is a lexer rule, isn't it? If so, there is no way to
make this work in ANTLR3ea5, but this will work in the next release.

HTH

Oliver