Re: feature request (&&/|| shortcut)
On Sun, Jan 02, 2011 at 05:29:08PM +0100, Arnold Nipper wrote: > It looks like BIRD logical && operator is not doing a shortcut. I.e even > if you have s.th. like > > if 0 && $some_complex_expression then ... > if 1 || $some_complex_expression then ... > > BIRD will try to evaluate $some_complex_expression. Would really be > great if you could short cut this as you may have situations where the > first expression already is false while trying to evaluate 2nd > expression may lead to run time errors in that case. In this case you > would have to use a nested "if first_expression then if 2nd_expression > then" instead of "if first_expression && 2nd_expression then" You are right, short-circuit evaluation is probably a better behavior. I will look at that and probably change that. -- Elen sila lumenn' omentielvo Ondrej 'SanTiago' Zajicek (email: santi...@crfreenet.org) OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net) "To err is human -- to blame it on a computer is even more so." signature.asc Description: Digital signature
Re: feature request (&&/|| shortcut)
on 02.01.2011 17:29 Arnold Nipper wrote: > First of all a Happy New Year and a prosperous and successfull 2011 to > everyone! May all your wishes come through! > > > It looks like BIRD logical && operator is not doing a shortcut. I.e even > if you have s.th. like > > if 0 && $some_complex_expression then ... > if 1 || $some_complex_expression then ... > > BIRD will try to evaluate $some_complex_expression. Would really be > great if you could short cut this as you may have situations where the > first expression already is false while trying to evaluate 2nd > expression may lead to run time errors in that case. In this case you > would have to use a nested "if first_expression then if 2nd_expression > then" instead of "if first_expression && 2nd_expression then" > no one bites? Best regards, Arnold -- Arnold Nipper / nIPper consulting, Sandhausen, Germany email: arn...@nipper.de phone: +49 6224 9259 299 mobile: +49 152 53717690 fax: +49 6224 9259 333 signature.asc Description: OpenPGP digital signature
