MooseX::Traits::Pluggable(3) trait loading and resolution for Moose


See MooseX::Traits for usage information.

Use "new_with_traits" to construct an object with a list of traits and "apply_traits" to apply traits to an instance.

Adds support for class precedence search for traits and some extra attributes, described below.


If the value of ``_trait_namespace'' in MooseX::Traits starts with a "+" the namespace will be considered relative to the "class_precedence_list" (ie. @ISA) of the original class.


  package Class1
  use Moose;
  package Class1::Trait::Foo;
  use Moose::Role;
  has 'bar' => (
      is       => 'ro',
      isa      => 'Str',
      required => 1,
  package Class2;
  use parent 'Class1';
  with 'MooseX::Traits';
  has '+_trait_namespace' => (default => '+Trait');
  has '+_traits_behave_like_roles' => (default => 1);
  package Class2::Trait::Bar;
  use Moose::Role;
  has 'baz' => (
      is       => 'ro',
      isa      => 'Str',
      required => 1,
  package main;
  my $instance = Class2->new_with_traits(
      traits => ['Foo', 'Bar'],
      bar => 'baz',
      baz => 'quux',
  $instance->does('Class1::Trait::Foo'); # true
  $instance->does('Class2::Trait::Bar'); # true


You can search multiple namespaces for traits, for example:

  has '+_trait_namespace' => (
      default => sub { [qw/+Trait +Role ExtraNS::Trait/] }

Will search in the "class_precedence_list" for "::Trait::TheTrait" and "::Role::TheTrait" and then for "ExtraNS::Trait::TheTrait".


By default, a method from a role will override a class method, this however is not the behavior one expects when applying a Moose role using the normal methods.

If you want the behavior to be consistent with Moose roles, then use this configuration attribute in your class:

  has '+_traits_behave_like_roles' => (default => 1);

This may or may not become the default in the future, for now you have to ask for it for backward compatibility reasons.



When traits are applied to your class or instance, you get an anonymous class back whose name will be not the same as your original class. So "ref $self" will not be "Class", but "$self->_original_class_name" will be.


List of the (unresolved) traits applied to the instance.


List of traits applied to the instance resolved to full package names.


Please report any bugs or feature requests to "bug-moosex-traits-pluggable at", or through the web interface at <>. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.


Rafael Kitover "<[email protected]>"


Tomas Doran, "<[email protected]>" Fitz Elliott, "<[email protected]>" Andreas Marienborg, "<[email protected]>" Alexander Hartmaier, "<[email protected]>"


Copyright (c) 2014 by the aforementioned ``AUTHOR'' and ``CONTRIBUTORS''.

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.