Thomas Sandlaà writes:
> This gives:
>
> my @x = (1,2,3);
>
> my $x = [1,2,3];
> my $x = ref (1,2,3); # also without ()?
> my $x = \* (1,2,3); # also without ()?
>
> Accepting the above completes the junction constructing operators:
>
> my $x = 1|2|3; # any
> my $x = 1^2^3; # one
> my $x = 1&2&3; # all
> my $x = 1\2\3; # none
That's quite nice, but I've been kind of wanting to go the other way.
You know, not every operation in Perl 6 needs to have a punctuation
operator.
I think we should not use \, and also get rid of ^. I'm interested in
seeing an example where using ^ is readable enough over one() where its
conciseness is warranted. I haven't found that yet. [1]
Luke
[1] Arguably you'd want it in type signatues, since this is not very
readable:
sub foo( one(Dog, Cat, Horse) $x )
But I counter that arguability by saying that you really shouldn't be
putting one() in type signatures. If you want something to be an A or a
B, and you're not doing any checking later on in the code, then it's
fine if it's both A and B. If you are doing checking later on, then it
should either be in a multimethod or you should factor it out into an
abstract type. Perl's not so keen on what you "should" do, though, but
I offer this as solace for those who wish to break the guidelines:
sub foo ( one(Dog, Cat, Horse) $x )
:-)
