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Date: Sun, 23 Nov 2003 14:52:17 -0600
To: Austin Hastings <Austin_Hasti...@Yahoo.com>
Cc: Damian Conway <dam...@conway.org>, perl6-langu...@perl.org
Subject: Re: 'catch' statement modifier
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From: d...@lighthouse.tamucc.edu (Jonathan Scott Duff)
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On Sun, Nov 23, 2003 at 03:53:00PM -0500, Austin Hastings wrote:
> > -----Original Message-----
> > From: Damian Conway [mailto:dam...@conway.org]
> >
> > Remember that a C<try> without a C<CATCH> catches all exceptions 
> > and returns
> > C<undef> (the same as a Perl 5 C<eval> block does).
> > 
> > So you just want:
> > 
> > 	try { $opus.write_to_file($file) }
> > 		err die "Couldn't write to $file: $!\n";
> 
> Is that C<err die> or C<or die> ?
> 
> And if so, what's C<err> and where can I find more on it?

Exegesis 4 ...

        In Apocalypse 3, Larry introduced the // operator, which is
        like a || that tests its left operand for definedness rather
        than truth.

        What he didn't mention (but which you probably guessed) was that
        there is also the low-precedence version of //. Its name is err:

          Operation         High Precedence       Low Precedence
          
         INCLUSIVE OR             ||                     or
         EXCLUSIVE OR             ~~                    xor
          DEFINED OR              //                    err

This is in the "Read or Die" section of E4 if you want to read more.

-Scott
-- 
Jonathan Scott Duff
d...@lighthouse.tamucc.edu