NAME

       Sub::HandlesVia::HandlerLibrary::Code - library of code-related methods

SYNOPSIS

         package My::Class {
           use Moo;
           use Sub::HandlesVia;
           use Types::Standard 'CodeRef';
           has attr => (
             is => 'rwp',
             isa => CodeRef,
             handles_via => 'Code',
             handles => {
               'my_execute' => 'execute',
               'my_execute_method' => 'execute_method',
             },
           );
         }

DESCRIPTION

       This is a library of methods for Sub::HandlesVia.

DELEGATABLE METHODS

   "execute( @args )"
       Calls the coderef, passing it any arguments.

         my $coderef = sub { 'code' };
         my $object  = My::Class->new( attr => $coderef );

         # $coderef->( 1, 2, 3 )
         $object->my_execute( 1, 2, 3 );

   "execute_method( @args )"
       Calls the coderef as if it were a method, passing any arguments.

         my $coderef = sub { 'code' };
         my $object  = My::Class->new( attr => $coderef );

         # $coderef->( $object, 1, 2, 3 )
         $object->my_execute_method( 1, 2, 3 );

EXTENDED EXAMPLES

   Using execute_method
       The execute_method handler allows a class to effectively provide certain methods which can
       be overridden by parameters in the constructor.

         use strict;
         use warnings;
         use Data::Dumper;

         package My::Processor {
           use Moo;
           use Sub::HandlesVia;
           use Types::Standard qw( Str CodeRef );

           has name => (
             is => 'ro',
             isa => Str,
             default => 'Main Process',
           );

           my $NULL_CODEREF = sub {};

           has _debug => (
             is => 'ro',
             isa => CodeRef,
             handles_via => 'Code',
             handles => { debug => 'execute_method' },
             default => sub { $NULL_CODEREF },
             init_arg => 'debug',
           );

           sub _do_stuff {
             my $self = shift;
             $self->debug( 'continuing process' );
             return;
           }

           sub run_process {
             my $self = shift;
             $self->debug( 'starting process' );
             $self->_do_stuff;
             $self->debug( 'ending process' );
           }
         }

         my $p1 = My::Processor->new( name => 'First Process' );
         $p1->run_process; # no output

         my @got;
         my $p2 = My::Processor->new(
           name => 'Second Process',
           debug => sub {
             my ( $processor, $message ) = @_;
             push @got, sprintf( '%s: %s', $processor->name, $message );
           },
         );
         $p2->run_process; # logged output

         my @expected = (
           'Second Process: starting process',
           'Second Process: continuing process',
           'Second Process: ending process',
         );
         say Dumper( \@got ); ## ==> \@expected

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) 2020, 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.