1 package MooseX::UndefTolerant::Constructor;
4 around _generate_slot_initializer => sub {
8 # note the key in the params may not match the attr name.
9 my $key_name = $self->_attributes->[$_[0]]->init_arg;
11 # insert a line of code at the start of the initializer,
12 # clearing the param if it's undefined.
14 if (defined $key_name)
16 # leave the value unscathed if the attribute's type constraint can
17 # handle undef (or doesn't have one, which implicitly means it can)
18 my $type_constraint = $self->_attributes->[$_[0]]->type_constraint;
19 if ($type_constraint and not $type_constraint->check(undef))
22 qq# delete \$params->{'$key_name'} unless # .
23 qq# exists \$params->{'$key_name'} && defined \$params->{'$key_name'};\n#;
25 return $tolerant_code . $self->$orig(@_);
29 return $self->$orig(@_);