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113394
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use 5.008; |
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use strict; |
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use warnings; |
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our $AUTHORITY = 'cpan:TOBYINK'; |
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our $VERSION = '0.045'; |
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use Sub::HandlesVia (); |
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232
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my %cache; |
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my ( $class, $attr ) = ( shift, shift ); |
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my ( $via, %delegations ) = ( @_ % 2 ) ? @_ : ( undef, @_ ); |
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if ( not defined $via ) { |
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$via = 'Array' if $attr =~ /^@/; |
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$via = 'Hash' if $attr =~ /^%/; |
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if ( not defined $via ) { |
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require Sub::HandlesVia::Mite; |
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Sub::HandlesVia::Mite::croak( |
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'Expected usage: '. |
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'use Sub::HandlesVia::Declare ( $attr, $via, %delegations );' |
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); |
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} |
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} |
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my $caller = caller; |
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if ( not $cache{$caller} ) { |
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'Sub::HandlesVia'->import( |
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{ |
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into => $caller, |
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installer => sub { $cache{$caller} = $_[1][1] }, |
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}, |
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qw( delegations ), |
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); |
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} |
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$cache{$caller}->( |
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attribute => $attr, |
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handles_via => $via, |
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handles => \%delegations, |
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); |
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} |
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46
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1; |
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48
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49
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=pod |
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51
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=encoding utf-8 |
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53
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=head1 NAME |
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55
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Sub::HandlesVia::Declare - declare delegations at compile-time |
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57
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=head1 SYNOPSIS |
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use Sub::HandlesVia::Declare( $attr, $via => %delegations ); |
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61
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This is roughly equivalent to the following: |
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use Sub::HandlesVia qw(delegations); |
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BEGIN { |
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delegations( |
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attribute => $attr, |
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handles_via => $via, |
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handles => \%delegations, |
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); |
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}; |
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73
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Except it doesn't import the C<delegations> function into your namespace. |
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75
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=head1 DESCRIPTION |
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77
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Useful for L<Object::Pad> and kind of nice for L<Class::Tiny>. Basically |
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any class builder than does its stuff at compile time. |
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80
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=head2 Object::Pad |
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82
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use Object::Pad; |
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84
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class Kitchen { |
85
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has @foods; |
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use Sub::HandlesVia::Declare '@foods', Array => ( |
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all_foods => 'all', |
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add_food => 'push', |
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); |
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} |
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92
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If an attribute begins with a '@' or '%', C<< $via >> can be omitted. |
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94
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use Object::Pad; |
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96
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class Kitchen { |
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has @foods; |
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use Sub::HandlesVia::Declare '@foods', ( |
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all_foods => 'all', |
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add_food => 'push', |
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); |
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} |
103
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104
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=head2 Class::Tiny |
105
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106
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package Kitchen; |
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use Class::Tiny { |
108
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foods => sub { [] }, |
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drinks => sub { [ 'water' ] }, |
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}; |
111
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use Sub::HandlesVia::Declare 'foods', Array => ( |
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all_foods => 'all', |
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add_food => 'push', |
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); |
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use Sub::HandlesVia::Declare 'drinks', Array => ( |
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all_drinks => 'all', |
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add_drink => 'push', |
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); |
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120
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=head1 BUGS |
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122
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Please report any bugs to |
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L<https://github.com/tobyink/p5-sub-handlesvia/issues>. |
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125
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=head1 SEE ALSO |
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127
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L<Sub::HandlesVia>. |
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129
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=head1 AUTHOR |
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131
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Toby Inkster E<lt>tobyink@cpan.orgE<gt>. |
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133
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=head1 COPYRIGHT AND LICENCE |
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135
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This software is copyright (c) 2022 by Toby Inkster. |
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137
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This is free software; you can redistribute it and/or modify it under |
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the same terms as the Perl 5 programming language system itself. |
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140
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=head1 DISCLAIMER OF WARRANTIES |
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142
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THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED |
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WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF |
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MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
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