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

NAME

Sub::HandlesVia::Manual::WithMoo - using Sub::HandlesVia with Moo

SYNOPSIS

 package Kitchen {
   use Moo;
   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',
     },
   );
 }

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 MooX::HandlesVia, which provides a similar feature, though has a more limited implementation. Sub::HandlesVia honours type constraints, plus it can mutate non-reference values.

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' ]

BUGS

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

Potential load order bugs

Unlike Moose, Moo doesn't really offer much of an API for extensions. As a result, most modules that provide extensions do so by wrapping the Moo keywords (especially "has"). Sub::HandlesVia is no exception to this. If you are using multiple Moo extensions, you may need to adjust the order you "use" them for them to work properly together. In some combinations, there may be no order that fully works!

Some known modules that should be imported before Sub::HandlesVia if you're using them: MooX::Should.

Some known modules that should be imported after Sub::HandlesVia if you're using them: MooX::ProtectedAttributes.

Some known modules that conflict with Sub::HandlesVia: none so far!

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.

2023-04-06 perl v5.38.2