Piers Cawley wrote:
>  My preference is for:
>  
>      Boo
>      Boo
>      Can't dereferene literal numeric literal 42 as a coderef.

How do you reach the second 'Boo'? Iff ->  does not create a Sub
but a Block instance then Luke's code can be interpreted as a
much smarter version of

    sub foo()
    {
        enter: 42;
        if $?RETURN_LABEL { goto $?RETURN_LABEL }
        return;
    }

     say "Boo!";
     say goto foo::enter; # goto sets up $?RETURN_LABEL
     say "after goto";

which of course prints

    Boo
    42
    after goto

The smartness is in the value that &prefix:{'-> '} returns
while in the snippet above it is explicitly coded.

Or do I completely misunderstand the distinction between
blocks and closures?
-- 
TSa (Thomas Sandlaß)