Sub::HandlesVia::Manual::WithMite(3) User Contributed Perl Documentation Sub::HandlesVia::Manual::WithMite(3)

Sub::HandlesVia::Manual::WithMite - using Sub::HandlesVia with Mite

package MyApp::Kitchen {
  use MyApp::Mite;

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

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".

Mite 0.009000 and above have built-in "handles_via" support. Mite will co-operate with Sub::HandlesVia to implement "handles_via" and avoid your project having a Sub::HandlesVia dependency!

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' ]

Mite goes to a lot of effort to avoid you needing to "use Sub::HandlesVia" directly in your classes and roles, and thus avoid you needing to add it as a dependency.

However, there are edge cases that it might not handle. In these cases, you should be able to "use SubHandlesVia" in your code after your "use MyApp::Mite" and Sub::HandlesVia will intervene and make things work. This adds a dependency on Sub::HandlesVia though.

package MyApp::Kitchen {
  use MyApp::Mite;
  use Sub::HandlesVia;

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

Now Mite will no longer generate "add_food" and "find_food" methods in your Kitchen.pm.mite.pm file when you run "mite compile". Instead, Sub::HandlesVia will generate them at run-time when your application runs.

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

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

Sub::HandlesVia, Mite.

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.

Toby Inkster <tobyink@cpan.org>.

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.

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.

2024-09-02 perl v5.40.0