Sub::HandlesVia::Manual::WithMouse(3p)

NAME
Sub::HandlesVia::Manual::WithMouse - using Sub::HandlesVia with Mouse

SYNOPSIS
 package Kitchen {
   use Mouse;
   use Sub::HandlesVia;
   use Types::Standard qw( ArrayRef Str );

   has food => (
     is          => 'ro',
     isa         => ArrayRef[Str],
     handles_via => 'Array',
     default     => sub { [] },
     handles     => {
       'add_food'    => 'push',
       'find_food'   => 'grep',
     },
   );
 }

(If you have a mouse in your kitchen, that might not be very hygienic.)

MANUAL
Sub::HandlesVia allows you to delegate methods from your class to the values of your objects' attributes.

Conceptually, it allows you to define "$object->push_number($n)" to be a shortcut for "$object->numbers->push($n)" except that "$object->numbers" is an arrayref, so doesn't have methods you can call on it like "push".

You should be able to use Sub::HandlesVia as a drop-in replacement for MouseX::NativeTraits, just replacing "traits => ['Array']" in an attribute definition with "handles_via => 'Array'".

  Usage in Mouse Roles
Mouse roles are only partially supported.

 package R1 {
   use Mouse:Role;
 }

 package R2 {
   use Mouse:Role;
   use Sub::HandlesVia;

   # define some attributes with delegation
 }

 # This class is broken.
 package C1 {
   use Mouse;
   with 'R1', 'R2';
 }

 # This class should work.
 package C2 {
   use Mouse;
   with 'R1';
   with 'R2';
 }

For details, see <https://github.com/tobyink/p5-sub-handlesvia/issues/9>.

Patches to fix the issue are very welcome!

  Which Methods Can Be Delegated To?
The "handles_via" option indicates which library of methods should be available. Valid values include Array, Blessed, Bool, Code, Counter, Enum, Hash, Number, Scalar, and String.

An arrayref can be provided for "handles_via", though many of the options are conceptually contradictory.

 handles_via => [ 'Number', 'Scalar' ]

  Mouse Native Types
Although the synopsis shows Types::Standard being used for type constraints, Mouse native types should also work fine.

 package Kitchen {
   use Mouse;
   use Sub::HandlesVia;

   has food => (
     is          => 'ro',
     isa         => 'ArrayRef[Str]',
     handles_via => 'Array',
     default     => sub { [] },
     handles     => {
       'add_food'    => 'push',
       'find_food'   => 'grep',
     },
   );
 }

  True MouseX::NativeTraits Drop-In Syntax
Sub::HandlesVia will also recognize MouseX::NativeTraits-style "traits". It will jump in and handle them before MouseX::NativeTraits notices!

 package Kitchen {
   use Mouse;
   use Sub::HandlesVia;

   has food => (
     is          => 'ro',
     isa         => 'ArrayRef[Str]',
     traits      => ['Array'],
     default     => sub { [] },
     handles     => {
       'add_food'    => 'push',
       'find_food'   => 'grep',
     },
   );
 }

BUGS
Please report any bugs to <https://github.com/tobyink/p5-sub-handlesvia/issues>.

SEE ALSO
Misc advanced documentation: Sub::HandlesVia::Manual::Advanced.

Sub::HandlesVia.

Documentation for delegatable methods: Sub::HandlesVia::HandlerLibrary::Array, Sub::HandlesVia::HandlerLibrary::Blessed, Sub::HandlesVia::HandlerLibrary::Bool, Sub::HandlesVia::HandlerLibrary::Code, Sub::HandlesVia::HandlerLibrary::Counter, Sub::HandlesVia::HandlerLibrary::Enum, Sub::HandlesVia::HandlerLibrary::Hash, Sub::HandlesVia::HandlerLibrary::Number, Sub::HandlesVia::HandlerLibrary::Scalar, and Sub::HandlesVia::HandlerLibrary::String.

AUTHOR
Toby Inkster <tobyink@cpan.org>.

COPYRIGHT AND LICENCE
This software is copyright (c) 2022 by Toby Inkster.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

DISCLAIMER OF WARRANTIES
THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.