On 03/19/2010 02:28 PM, Chris Prather wrote:
On Fri, Mar 19, 2010 at 2:22 PM, Sir Robert Burbridge
<rburb...@cisco.com> wrote:
Hey all,
I've read through the Moose::Manual::Types, Moose::Util::TypeConstraints,
and other things I could find. I don't quite see how I am supposed to
create a property that holds "a derivative of class X". For example, I
would like to do:
package A;
use Moose;
1;
package B;
use Moose;
extends A;
1;
package C;
use Moose;
has a => (isa=>'A', is=>'rw');
1;
### Create "B" which extends "A"
my $b = B->new();
### Create C with property "a" of value $b. $b is an "A" derivative,
### so I'd like it to be ok with that.
my $c = C->new(a=>$b);
Any help would be appreciated.
-Sir
Did you try your example?
use 5.10.0;
package A;
use Moose;
package B;
use Moose;
extends qw(A);
package C;
use Moose;
has attr => ( isa => 'A', is => 'ro' );
package main;
my $o = C->new( attr => B->new );
say $o->dump;
__END__
$VAR1 = bless( {
'attr' => bless( {}, 'B' )
}, 'C' );
Ooof. No, I hadn't (I just meant it as quick pseudo-code to illustrate
a problem). I guess I've mis-diagnosed the problem I was having.
Sorry for the spam; thanks for the lesson =)
-Sir
