Wow, thanks for that tip about inside out objects, I had not heard of that before but love the idea! My first attempt did not quite solve the problem:

#!/usr/bin/perl
use strict;
use warnings FATAL => qw(all);

{ package test;

use IO::Socket::INET;

our @ISA = ('IO::Socket::INET');

my %field;

sub new {
    my $class = shift;

    my $self = bless \do { 
        new IO::Socket::INET(
            PeerAddr => '127.0.0.1:80',
            Proto => 'tcp',
            Blocking => 0
        );
    }, $class;

    $field{$self} = shift;

    return $self;
}

sub getField {
    my $self = shift;
    return $field{$self};
}

sub DESTROY {
    my $self = shift;
    delete $field{$self};
    $self->SUPER::DESTROY();
    print STDERR "Bye!\n";
}

1; }

my $obj = test->new('okay');
print $obj->getField."\n";
print $obj->sockhost."\n";
[download]

Result:

root~/perl»./test1.pl 
okay
Not a GLOB reference at /usr/lib64/perl5/5.14.2/x86_64-linux-thread-mu
+lti/IO/Socket.pm line 246.
Bye!
[download]

Note that changing the last line to $$obj->sockhost will make it work, but I'd prefer this be a normal subclass. So tweaking the inside-out constructor a bit, since IO::Socket::new() returns a glob ref to start with:

#!/usr/bin/perl
use strict;
use warnings FATAL => qw(all);

{ package test;

use IO::Socket::INET;

our @ISA = ('IO::Socket::INET');

my %field;

sub new {
    my $class = shift;
    my $self = $class->SUPER::new (
        PeerAddr => '127.0.0.1:80',
        Proto => 'tcp',
        Blocking => 0
    );
    $field{$self} = pop;
    return $self;
}

sub getField {
    my $self = shift;
    return $field{$self};
}

sub DESTROY {
    my $self = shift;
    delete $field{$self};
    $self->SUPER::DESTROY();
    print STDERR "Bye!\n";
}

1; }

my $obj = test->new("okay");
print $obj->getField."\n";
print $obj->sockhost."\n";

my $two = test->new("two");
print $two->getField."\n";
[download]

Bingo:

root~/perl»./test2.pl 
okay
127.0.0.1
two
Bye!
Bye!
[download]

Thanks much. Besides making this possible (and guaranteeing I won't get into namespace entanglements with superclass members), I really like the idea of genuine encapsulation in perl. Etc. "Inside out". That is freaking brilliant. Somebody deserves a prize for that one.

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