Damian Conway wrote:
> Suppose C<with> were a built-in function with parameter list:
>
> sub with (\%; ^&) {...}
>
> That is, C<with> takes an explicit hash and -- optionally -- a block, sub
ref,
> or higher order function.
> <...>
> If C<with> is called with *both* a hash and a block/sub ref/h.o.f. as
> arguments, it still converts the hash contents to a named list, but then
> invokes its second argument on that list of arguments. So:
>
> with %args {
> print "Howdy, ", ^rank, " ", ^name;
> };
>
> # is really:
>
> (print "Howdy, ", ^rank, " ", ^name)->(with %args);
>
> # is really:
>
> $tmp = sub ($name, $rank) {print "Howdy, ", $rank, " ", $name};
> $temp->( name: $args{name}, rank: $args{rank});
>
Mmm... yummy... And placeholder names seem to be getting a real role in life
too! I wonder if hashes used as HOF arguments in general should use
placeholder names to fill in their arguments from the corresponding hash
elements. That would be even yummier!
