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It seems quite bizarre that this works...

use v5.14; use strict; use warnings FATAL => qw(all); package :::::::: { sub x { printf "(%s)\n", __PACKAGE__ }; } ::::::::::x ();
perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'

In reply to Perl allows package names consisting entirely of colons by tobyink

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    [sierpinski]: I've never seen $#$var before.
    [LanX]: $list cops be an array ref
    [LanX]: could
    [LanX]: $#array gives the length
    [LanX]: no sorry ...
    [sierpinski]: so that would just be deferencing it...
    [LanX]: the last index!
    [LanX]: yes
    [sierpinski]: yeah I guess $list is a reference.. yeah
    [sierpinski]: why is it the last index and not the first? because the length of the array becomes the index?

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