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Re: Re: Repository of Parse::RecDescent grammars?

by Hanamaki (Chaplain)
on Aug 07, 2002 at 16:07 UTC ( #188367=note: print w/replies, xml ) Need Help??


in reply to Re: Repository of Parse::RecDescent grammars?
in thread Repository of Parse::RecDescent grammars?

You might ask theDamian if he'd be willing to include some standard grammars in the Parse::RecDescent tarball-- in addition to the demos folder, a templates folder might be handy...

If theDamian or someone else tells you that this does not seem to be a good idea, you can give him the hint that this kind of work was already done for regular grammars by theDamian (now maintained by Abigail).

Hanamaki;-)
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[hippo]: For explanation, I've seen this construct in someone else's code (no names, no pack drill) and couldn't think of a situation to trigger it.
[Corion]: You'll have to look somewhere esoteric for that. Maybe some tied variable or special dualvar can also trigger that. But it's certainly not a common occurrence
[Corion]: And on 5.20, the following also outputs no find:perl -wle 'for my $x ("\x{2000}".."\ x{1fffff}") { if( $x && ! length $x ) { warn qq(<$x>); warn length $x; die } }'
[Corion]: (this time on Unix)
[hippo]: Understood. I'll have to go through the code and see if it's doing anything fancy with ties, dual-vars or non-scalars. In the end, it's probably a bug though.
[Corion]: Aaah - you should be able to do this with overload, but I would hit somebody really hard if they constructed objects that are true but the empty string, and you not knowing about the domain knowledge where this makes sense

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