Moose::Meta::TypeConstraint::DuckType(3p)

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
See "BUGS" in Moose for details on reporting bugs.

AUTHOR
Chris Prather <chris@prather.org>

Shawn M Moore <sartak@gmail.com>

COPYRIGHT AND LICENSE
Copyright 2006-2010 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.