NAME

Moose::Meta::TypeConstraint::DuckType - Type constraint for duck typing

DESCRIPTION

This class represents type constraints based on an enumerated list of required methods.

INHERITANCE

Moose::Meta::TypeConstraint::DuckType is a subclass of Moose::Meta::TypeConstraint.

METHODS

Moose::Meta::TypeConstraint::DuckType->new(%options)

This creates a new duck type constraint based on the given %options.

It takes the same options as its parent, with several exceptions. First, it requires an additional option, methods. This should be an array reference containing a list of required method names. Second, it automatically sets the parent to the Object type.

Finally, it ignores any provided constraint option. The constraint is generated automatically based on the provided methods.

$constraint->methods

Returns the array reference of required methods provided to the constructor.

$constraint->create_child_type

This returns a new Moose::Meta::TypeConstraint object with the type as its parent.

Note that it does not return a Moose::Meta::TypeConstraint::DuckType object!

BUGS

All complex software has bugs lurking in it, and this module is no exception. If you find a bug please either email me, or add the bug to cpan-RT.

AUTHOR

Chris Prather <chris@prather.org>

Shawn M Moore <sartak@gmail.com>

COPYRIGHT AND LICENSE

Copyright 2006-2009 by Infinity Interactive, Inc.

http://www.iinteractive.com

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