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Postings from July 2013
On Wed, Jun 26, 2013 at 09:59:02PM -0400, Ricardo Signes wrote:
> push @y, $x->{foo}->[0]->m->@*;
> If we want the two forms to be really of equivalent value, we'll also need to
> be concerned with:
>
> print "Things: $aref_of_things->@*"
>
> ...which gets into less clearly-introduceable behavior.
Alternatively, what about instead of expr->@*, we use
expr->[]?
This is currently a syntax error. It has the mnemonic of a list slice
that contains all elements. Ditto expr->{}.
It's also currently a syntax error in quoted strings, so can easily be used
there too:
print "$a->{}bar"
It could conceivably be expanded to indicate slicing, such as
$a->[1,5,7]
*except* that this is currently valid syntax, where the list of indices is
evaluated in scalar context, which discards all but the last element. So
the above is currently equivalent to
$a->[7]
Potentially we could deprecate the current behaviour, then (if it turns
out not to be commonly used), repurpose it. This would also allow slices
in strings, e.g. "$a->[1,5,7]", which also currently evaluates to
"$a->[7]".
--
I thought I was wrong once, but I was mistaken.
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