This is inferior to Sub::Name for two reasons:

• you have to put the magic line inside the anon sub
• all other anon subs down the call stack are renamed too, which is misleading

use strict;
use warnings;
use Carp;

sub foo {
    my $bar = sub {
        carp "*** inner anon sub called***";
    };
    $bar->();
}

sub generate {
    my ( $name ) = @_ ;

    return sub {
        local *__ANON__ = $name
          if $name;
        carp "***sub called***";
        foo();
    }
}

sub super {
    my $not_named = generate();
    $not_named->();

    my $named = generate('HulaHoop');
    $named->();
}

super();
[download]

Still, it's good to know that it's possible to do it in pure perl.