Date: Fri, 12 Mar 2004 12:01:10 -0800 Larry Wall wrote:
>It's really a pity that question mark is already so overloaded with
>boolean connotations, because
>
> $dog? .bark
>
>would really be the best postfix operator in ASCII for this.
>People would probably end up writing
>
> my Dog $spot ?= .new;
>
>as an idiom. And
>
> @array?[.min .. .max]
>
>would be the way to get a topicalized subscript.
some time in the past there was a talk about ... ?? ... :: ... operator being
a combination of two binary : ?? and :: . But I dont know the ruling.
If one factorize trinary ??:: to two binary operators,
?? could act a postfix topicalazer while :: becomes binary
operator :
$a :: $b evaluates to left or right argument according to true/false property of the
_current topic_
something like infix:::($a,$b){ given CALLER::_ { when .true return $a ; return $b }
but it evaluate $b only
if necessary.
Arcadi
