I want to inherit a module based on a parameter given to the constructor. The simplified example below should illustrate what I'm trying to do, but it doesn't work (I assume because @ISA needs to be global). In the real module, the constructor will receive a filename, then inherit another module based on the file's extension.

Is it possible to make something like this work? Or are there better alternatives? Thanks. 

use strict;
use warnings;

my $ob1 = foo->new('alpha');
my $ob2 = foo->new('beta');

$ob1->write;
$ob2->write;

package foo;
    sub new{
        my $class = shift;
        our @ISA = (shift);
        return bless {}, $class;
    }
    sub write{
        my $self = shift;
        print $self->read;
    }

package alpha;
    sub read{
        return "Alpha\n";
    }

package beta;
    sub read{
        return "Beta\n";
    }

[download]

Desired output:

Alpha
Beta

[download]

Update: Thanks for the help everyone. I think I've got a handle on this now.

In reply to Dynamically setting up inheritence at runtime by hangon

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