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1 | package Class::MOP::Mixin::AttributeCore; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | |
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6 | our $VERSION = '1.11'; |
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7 | $VERSION = eval $VERSION; |
8 | our $AUTHORITY = 'cpan:STEVAN'; |
9 | |
10 | use Scalar::Util 'blessed'; |
11 | |
12 | use base 'Class::MOP::Mixin'; |
13 | |
14 | sub has_accessor { defined $_[0]->{'accessor'} } |
15 | sub has_reader { defined $_[0]->{'reader'} } |
16 | sub has_writer { defined $_[0]->{'writer'} } |
17 | sub has_predicate { defined $_[0]->{'predicate'} } |
18 | sub has_clearer { defined $_[0]->{'clearer'} } |
19 | sub has_builder { defined $_[0]->{'builder'} } |
20 | sub has_init_arg { defined $_[0]->{'init_arg'} } |
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21 | sub has_default { exists $_[0]->{'default'} } |
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22 | sub has_initializer { defined $_[0]->{'initializer'} } |
23 | sub has_insertion_order { defined $_[0]->{'insertion_order'} } |
24 | |
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25 | sub _set_insertion_order { $_[0]->{'insertion_order'} = $_[1] } |
26 | |
27 | sub has_read_method { $_[0]->has_reader || $_[0]->has_accessor } |
28 | sub has_write_method { $_[0]->has_writer || $_[0]->has_accessor } |
29 | |
30 | sub is_default_a_coderef { |
31 | # Uber hack because it is called from CMOP::Attribute constructor as |
32 | # $class->is_default_a_coderef(\%options) |
33 | my ($value) = ref $_[0] ? $_[0]->{'default'} : $_[1]->{'default'}; |
34 | |
35 | return unless ref($value); |
36 | |
37 | return ref($value) eq 'CODE' |
38 | || ( blessed($value) && $value->isa('Class::MOP::Method') ); |
39 | } |
40 | |
41 | sub default { |
42 | my ( $self, $instance ) = @_; |
43 | if ( defined $instance && $self->is_default_a_coderef ) { |
44 | # if the default is a CODE ref, then we pass in the instance and |
45 | # default can return a value based on that instance. Somewhat crude, |
46 | # but works. |
47 | return $self->{'default'}->($instance); |
48 | } |
49 | $self->{'default'}; |
50 | } |
51 | |
52 | 1; |
53 | |
54 | __END__ |
55 | |
56 | =pod |
57 | |
58 | =head1 NAME |
59 | |
60 | Class::MOP::Mixin::AttributeCore - Core attributes shared by attribute metaclasses |
61 | |
62 | =head1 DESCRIPTION |
63 | |
64 | This class implements the core attributes (aka properties) shared by all |
65 | attributes. See the L<Class::MOP::Attribute> documentation for API details. |
66 | |
67 | =head1 AUTHORS |
68 | |
69 | Dave Rolsky E<lt>autarch@urth.orgE<gt> |
70 | |
71 | =head1 COPYRIGHT AND LICENSE |
72 | |
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73 | Copyright 2006-2010 by Infinity Interactive, Inc. |
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74 | |
75 | L<http://www.iinteractive.com> |
76 | |
77 | This library is free software; you can redistribute it and/or modify |
78 | it under the same terms as Perl itself. |
79 | |
80 | =cut |