[perl #51850] [TODO] [PGE] recognize the <a b c> form of alternation
Will Coleda via RT
parrotbug-followup at parrotcode.org
Thu Sep 17 15:07:42 UTC 2009
On Wed Mar 19 07:53:15 2008, pmichaud wrote:
> On Tue, Mar 18, 2008 at 08:21:09AM -0700, Stephane Payrard wrote:
> >
> > A <?before> rule with a space between the '<' and the '?' compiles
> > but fails at execution
> > with the unhelpful message :
> > Unable to find regex ''
> > Null PMC access in invoke()
>
> I agree that this is not a useful error message. However, when
> PGE is corrected to follow the specification the regex
>
> < ?before foo>
>
> would be identical to
>
> '?before' | 'foo'
>
> and no error message would be generated at all.
>
> (PGE hasn't been updated to recognize the < a b c > form of
> alternation.)
>
> Pm
>
Now tracking at https://trac.parrot.org/parrot/ticket/1017
--
Will "Coke" Coleda
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