On Mon, 2 Aug 2010 19:50:12 +0200
Brian ROONEY <[email protected]> wrote:
> Hi,
>
> How does one get the helper traits for a parameterized type? Here I
> am using the helper: Moose::Meta::Attribute::Native::Trait::Hash
> For HashRef
>
> The hash actually contains parameterized CodeRefs so I would like to
> use: Moose::Meta::Attribute::Native::Trait::Code
> For CodeRef
>
> Is this possible?
> Thanks
>
>
> has 'actions' => (
> traits => ['Hash'],
> is => 'rw',
> isa => 'HashRef[CodeRef]',
> required => 0,
> handles => {
> set_actions => 'set',
> get_actions => 'get',
> delete_action => 'delete',
> keys_actions => 'keys',
> exists_action => 'exists',
> defined_action => 'defined',
> values_actions => 'values',
> pairs_actions => 'kv',
> elements_actions => 'elements',
> clear_actions => 'clear',
> num_actions => 'count',
> has_no_actions => 'is_empty',
> accessor_actions => 'accessor',
> },
> );
>
Did you try it and see?
package Foo;
use Moose;
has 'bar' => (
traits => ['Hash'],
is => 'ro',
isa => 'HashRef[CodeRef]',
default => sub { +{} },
handles =>
{
set_actions => 'set',
get_actions => 'get',
}
);
no Moose;
package main;
my $foo = Foo->new();
$foo->set_actions('Baz', sub { print "Yahoo!\n"; });
$foo->set_actions('Flarg', sub { print "Zoom!\n"; });
$foo->get_actions('Baz')->();
$foo->get_actions('Flarg')->();
$foo->set_actions('Yarg', 'Some random string'); # errors here;
__END__
Value Some random string did not pass container type constraint
'CodeRef'
at
/home/nicholas/installed/perl5/perls/default/lib/site_perl/5.10.1/x86_64-linux/Moose/Meta/Attribute/Native/MethodProvider/Hash.pm
line 84
Moose::Meta::Attribute::Native::MethodProvider::Hash::__ANON__('Foo=HASH(0x1ee5400)',
'Yarg', 'Some random string') called
at
/home/nicholas/installed/perl5/perls/default/lib/site_perl/5.10.1/x86_64-linux/Moose/Meta/Attribute/Native/Trait.pm
line 124 Foo::set_actions('Foo=HASH(0x1ee5400)', 'Yarg', 'Some random
string') called at /tmp/example.pl line 25
Yahoo!
Zoom!
--
Nicholas Perez
XMPP/Email: [email protected]
http://search.cpan.org/~nperez/
http://github.com/nperez
