Sub::HandlesVia::Declare(3)                User Contributed Perl Documentation


NAME
       Sub::HandlesVia::Declare - declare delegations at compile-time

SYNOPSIS
        use Sub::HandlesVia::Declare( $attr, $via => %delegations );

       This is roughly equivalent to the following:

        use Sub::HandlesVia qw(delegations);

        BEGIN {
          delegations(
            attribute    => $attr,
            handles_via  => $via,
            handles      => \%delegations,
          );
        };

       Except it doesn't import the "delegations" function into your
       namespace.

DESCRIPTION
       Useful for Object::Pad and kind of nice for Class::Tiny. Basically any
       class builder than does its stuff at compile time.

   Object::Pad
        use Object::Pad;

        class Kitchen {
          has @foods;
          use Sub::HandlesVia::Declare '@foods', Array => (
            all_foods => 'all',
            add_food  => 'push',
          );
        }

       If an attribute begins with a '@' or '%', $via can be omitted.

        use Object::Pad;

        class Kitchen {
          has @foods;
          use Sub::HandlesVia::Declare '@foods', (
            all_foods => 'all',
            add_food  => 'push',
          );
        }

   Class::Tiny
        package Kitchen;
        use Class::Tiny {
          foods  => sub { [] },
          drinks => sub { [ 'water' ] },
        };
        use Sub::HandlesVia::Declare 'foods', Array => (
          all_foods  => 'all',
          add_food   => 'push',
        );
        use Sub::HandlesVia::Declare 'drinks', Array => (
          all_drinks => 'all',
          add_drink  => 'push',
        );

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

SEE ALSO
       Sub::HandlesVia.

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.

perl v5.40.0                      2024-09-02       Sub::HandlesVia::Declare(3)