[antlr-interest] ANTLR 3.0 -> 3.1.1 Broke Working Parser

[Jim Idle]

On Tue, 2008-10-07 at 09:07 -0700, Randall R Schulz wrote:

> Hi,
> 
> I've just discovered that an ANTLR parser created using version 3.0 that
> I'd been using successfully for over a year is broken now that I rebuilt
> it using ANTLR 3.1.1.
> 
> The rules in question (hopefully this tiny excerpt is sufficient for
> someone to recognize a change between 3.0 and 3.1) are:
> 
> 
> 
> termSequence
>     :   ( term | SequenceMark ) *
>     ;
> 
> atom
>     :   ( Open term termSequence Close )
>     ->  ^( Atom term termSequence )


Obviously, termSequence can be empty. It was a bug in 3.0 in fact, so
all you need do is this:

->  ^( Atom term termSequence? )

Jim
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