MooseX::CurriedDelegation - Curry your delegations with methods
This document describes version 0.003 of MooseX::CurriedDelegation - released November 09, 2016 as part of MooseX-CurriedDelegation.
use Moose;
use MooseX::CurriedDelegation;
has one => (is => 'ro', isa => 'Str', default => 'default');
has foo => (
is => 'rw',
isa => 'TestClass::Delagatee', # has method curried()
default => sub { TestClass::Delagatee->new },
handles => {
# method-curry
# Note the hashref, not arrayref, we employ
# first arg is the remote method to delegate to
# second is an arrayref comprising:
# coderef to call as a method on the instance, followed by
# "static" curry args
#
# so, essentially:
# $self->foo->remote_method($self->$coderef(), @remaining_args);
#
# foo_del_one => {
# remote_method => [ sub { ... }, qw{ static args } ],
# },
foo_del_one => { curried => [ sub { shift->one }, qw{ more curry args } ] },
# curry_to_self() always returns: sub { shift }
foo_del_two => { other_method => [ curry_to_self ] },
},
);
Method delegation is awfully handy -- but sometimes it'd be awfully handier if it was a touch more dynamic. This is an attribute trait that provides for a delegated method to be curried.
Using this package will cause the relevant attribute trait to be applied without requiring further intervention. We use the standard
handles => { local_method => delegate_info, ... }
delegation methodology, however our currying is invoked when delegate_info is a hashref. We expect delegate info to look like:
{ remote_method => [ $coderef, @more_curry_args ] }
Only $coderef is ever executed by the delegation. This means that it is safe to have any number of additional coderefs in @more_curry_args: they will be passed through to remote_method without additional manipulation.
In addition, we export a number of helper functions.
This function always returns a coderef like "sub { shift }". That is, this:
local => { remote => [ curry_to_self ] }
is equivalent to:
local => { remote => [ sub { shift } ] }
is equivalent to:
$self->attribute_accessor->remote($self)
Resolves out to the full name of our attribute trait; you can use it as:
has foo => (traits => [CurriedDelegation], ...)
Please see those modules/websites for more information related to this module.
Please report any bugs or feature requests on the bugtracker website https://github.com/RsrchBoy/moosex-currieddelegation/issues
When submitting a bug or request, please include a test-file or a patch to an existing test-file that illustrates the bug or desired feature.
Chris Weyl [email protected]
Please note I do not expect to be gittip'ed or flattr'ed for this work, rather it is simply a very pleasant surprise. I largely create and release works like this because I need them or I find it enjoyable; however, don't let that stop you if you feel like it ;)
Flattr, Gratipay, or indulge my Amazon Wishlist... If and *only* if you so desire.
This software is Copyright (c) 2012 by Chris Weyl.
This is free software, licensed under:
The GNU Lesser General Public License, Version 2.1, February 1999