I want my class to blow up if the BUILD
method fails. However, if I use croak
to handle the error, the error gets reported from Class/MOP/Method.pm
, rather than the caller's code. (That is to say, the caller who instantiates the object.) IOW, croak
isn't barking far enough up the call tree.
Behold:
package Test;
use Moose;
use Carp 'croak';
sub BUILD {
croak 'u r dum';
}
1;
Instantiating Test
results in:
u r dum at /home/friedo/perl5/lib/perl5/x86_64-linux-gnu-thread-multi/Class/MOP/Method.pm line 125
Carp.pm
is supposed to pay attention to a package variable called @CARP_NOT
to know which packages to avoid, but it seems to only pay attention to one item on the list. For example, if I add this to my Test.pm
:
our @CARP_NOT = ( 'Class::MOP::Method' );
Then the result is:
u r dum at /home/friedo/perl5/lib/perl5/x86_64-linux-gnu-thread-multi/Moose/Object.pm line 59
So I should just add that to the array as well, right?
our @CARP_NOT = ( 'Class::MOP::Method', 'Moose::Object' );
Then the result is still:
u r dum at /home/friedo/perl5/lib/perl5/x86_64-linux-gnu-thread-multi/Moose/Object.pm line 59
Moose::Object
seems unaffected.
I've been banging my head against this for a while now and can't seem to figure out what's messing it up.
Thanks.
make_immutable
seems to fix that. Of course, I don't know what to do if you do need your classes to be mutable.Without
make_immutable
,Test->new
invokesMoose::Object->new
. If you look at theconfess
output, you'll note:Output:
From Moose::Cookbook::Basics::Recipe7: