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Postings from December 2021
On Sat, 18 Dec 2021 15:02:05 -0800
Darren Duncan <darren@darrenduncan.net> wrote:
> > But then that means that to be consistent with that, here:
> >
> > if ($foo) {
> > bar();
> > } else {
> > baz();
> > }
> >
> > if $foo is unknown we can't enter either block
>
> Yes, and that's the answer. I would argue that when given an unknown
> input the effect of this block would be a no-op.
I think if you were to present this if/else code to anyone not
intimately familiar with this three-value logic idea, and tell them
there is a value you can put in $foo which makes neither branch
execute, they would look at you strangely and consider you quite mad.
There may be a Lewis Carroll quote applicable here...
Suffice to say, at this point I really don't feel like it's something
we want to be entertaining in a regular language with regular keywords.
If such a 3VL system were added, it really wants to have its own
keywords and syntax, so people are appropriately warned that Weird
Things are afoot.
--
Paul "LeoNerd" Evans
leonerd@leonerd.org.uk | https://metacpan.org/author/PEVANS
http://www.leonerd.org.uk/ | https://www.tindie.com/stores/leonerd/
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