Front page | perl.perl5.porters |
Postings from December 2010
On Mon, Dec 06, 2010 at 04:32:41PM +0000, Ed Avis wrote:
> Abigail <abigail <at> abigail.be> writes:
>
> >> $ perl -MO=Deparse -wce 'my %h = ("-aa" => 1)'
>
> >I don't know what your point with this example is.
>
> Sorry - stupidity on my part. Of course it is already quoted.
>
> >>It's a bit odd for the quoting behaviour to differ like this - or at least, I
> >>would expect that if => has the effect of quoting its LHS, then it should also
> >>bind to it a bit more tightly.
> >
> >Sorry, no idea what you mean here.
>
> I might expect
>
> 12 -aa => 1
>
> to be equivalent to
>
> 12 - (aa => 1)
That still isn't a syntax error; it's just a silly way of writing '11'.
It would also mean that:
%h = (3 + $foo => 7);
is another way of writing:
%h = (10, undef);
I don't think we should have had => bind more tightly than binary
arithmetic operators. And I certainly don't think we should change this.
> So that if => is quoting just the 'aa' part, and not '-aa', then it should
> also bind to just the 'aa' part. On the other hand, if - binds more tightly than
> =>, then => should not have any special quoting effect because its LHS is not
> a plain string but the seeming expression (12 - aa).
Abigail
Thread Previous