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.\" ========================================================================
.\"
.IX Title "Moose::Meta::TypeConstraint::DuckType 3pm"
.TH Moose::Meta::TypeConstraint::DuckType 3pm "2018-11-02" "perl v5.28.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
Moose::Meta::TypeConstraint::DuckType \- Type constraint for duck typing
.SH "VERSION"
.IX Header "VERSION"
version 2.2011
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This class represents type constraints based on an enumerated list of
required methods.
.SH "INHERITANCE"
.IX Header "INHERITANCE"
\&\f(CW\*(C`Moose::Meta::TypeConstraint::DuckType\*(C'\fR is a subclass of
Moose::Meta::TypeConstraint.
.SH "METHODS"
.IX Header "METHODS"
.SS "Moose::Meta::TypeConstraint::DuckType\->new(%options)"
.IX Subsection "Moose::Meta::TypeConstraint::DuckType->new(%options)"
This creates a new duck type constraint based on the given
\&\f(CW%options\fR.
.PP
It takes the same options as its parent, with several
exceptions. First, it requires an additional option, \f(CW\*(C`methods\*(C'\fR. This
should be an array reference containing a list of required method
names. Second, it automatically sets the parent to the \f(CW\*(C`Object\*(C'\fR type.
.PP
Finally, it ignores any provided \f(CW\*(C`constraint\*(C'\fR option. The constraint
is generated automatically based on the provided \f(CW\*(C`methods\*(C'\fR.
.ie n .SS "$constraint\->methods"
.el .SS "\f(CW$constraint\fP\->methods"
.IX Subsection "$constraint->methods"
Returns the array reference of required methods provided to the
constructor.
.ie n .SS "$constraint\->create_child_type"
.el .SS "\f(CW$constraint\fP\->create_child_type"
.IX Subsection "$constraint->create_child_type"
This returns a new Moose::Meta::TypeConstraint object with the type
as its parent.
.PP
Note that it does \fInot\fR return a \f(CW\*(C`Moose::Meta::TypeConstraint::DuckType\*(C'\fR
object!
.SH "BUGS"
.IX Header "BUGS"
See \*(L"\s-1BUGS\*(R"\s0 in Moose for details on reporting bugs.
.SH "AUTHORS"
.IX Header "AUTHORS"
.IP "\(bu" 4
Stevan Little <stevan.little@iinteractive.com>
.IP "\(bu" 4
Dave Rolsky <autarch@urth.org>
.IP "\(bu" 4
Jesse Luehrs <doy@tozt.net>
.IP "\(bu" 4
Shawn M Moore <code@sartak.org>
.IP "\(bu" 4
יובל קוג'מן (Yuval Kogman) <nothingmuch@woobling.org>
.IP "\(bu" 4
Karen Etheridge <ether@cpan.org>
.IP "\(bu" 4
Florian Ragwitz <rafl@debian.org>
.IP "\(bu" 4
Hans Dieter Pearcey <hdp@weftsoar.net>
.IP "\(bu" 4
Chris Prather <chris@prather.org>
.IP "\(bu" 4
Matt S Trout <mst@shadowcat.co.uk>
.SH "COPYRIGHT AND LICENSE"
.IX Header "COPYRIGHT AND LICENSE"
This software is copyright (c) 2006 by Infinity Interactive, Inc.
.PP
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.