Hmmm... That's a good point. It's the same thing with Class::Accessor::Lvalue. When you want to upgrade to a full method, you're stuck: there doesn't seem to be an easy way to make an lvalue subroutine that has access to the rvalue.

Update: But you're right - Attribute::Property does allow you to do all the processing you want, as long as you follow it's rules. So it's probably enough.

Update: For instance, you could do:

    sub email : Property {
        my $self = shift;
        $_ = 'some_arbitrary@address.com';
        1;
    }

    # ...

    # user code
    $self->email = 'my@address.com';
    print $self->email;  #  prints some_arbitrary@address.com
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Michael