MooseX::Attributes::Curried(3)

NAME
MooseX::Attributes::Curried - curry your "has"es

SYNOPSIS
    package MyAttrs;
    use MooseX::Attributes::Curried (
        has_datetime => {
            isa     => 'DateTime',
            default => sub { DateTime->now },
        },
        has_rw => {
            is => 'rw',
        },
    );

    package My::Class;
    use Moose;
    use MyAttrs;

    has_datetime 'birthday' => (
        is => 'ro',
    );

    has_rw 'age' => (
        isa => 'Int',
    );

DESCRIPTION
This module lets you define curried versions of "has" in Moose. If many of your attributes share the same options, especially across multiple classes, then you can refactor those options away into a curried "has".

Typical usage of this extension is to create a standalone ""has" library" module. If you only need a curried "has" for one class, then you might as well just define a "sub has_datetime { has(...) }" in that class.

When you use your ""has" library", you can customize each curried "has" further by specifying additional options on your import line, like so:

    use MyAttrs (
        has_datetime => {
            is => 'ro',
        },
        has_datetime => {
            -as      => 'needs_datetime',
            required => 1,
        },
    );

Your "defaults" for the attribute can also be a code reference. This code reference will receive both the additional specializations performed when the curried attribute was imported, as well as any additional specializations used in the individual attribute. This is immensely powerful, see t/007-smart-has.t for a taste.

SEE ALSO
MooseX::Attribute::Prototype, which has very similar goals; this extension was originally proposed as an implementation of prototype attributes.

AUTHOR
Shawn M Moore, "sartak@gmail.com"

COPYRIGHT AND LICENSE
Copyright 2009 Shawn M Moore.

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