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1 | package Moose::Meta::TypeConstraint::Class; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | use metaclass; |
6 | |
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7 | use Scalar::Util 'blessed'; |
8 | use Moose::Util::TypeConstraints (); |
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9 | |
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10 | our $VERSION = '0.51'; |
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11 | our $AUTHORITY = 'cpan:STEVAN'; |
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12 | |
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13 | use base 'Moose::Meta::TypeConstraint'; |
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14 | |
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15 | __PACKAGE__->meta->add_attribute('class' => ( |
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16 | reader => 'class', |
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17 | )); |
18 | |
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19 | sub new { |
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20 | my ( $class, %args ) = @_; |
21 | |
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22 | $args{parent} = Moose::Util::TypeConstraints::find_type_constraint('Object'); |
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23 | my $self = $class->meta->new_object(%args); |
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24 | |
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25 | $self->_create_hand_optimized_type_constraint; |
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26 | $self->compile_type_constraint(); |
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27 | |
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28 | return $self; |
29 | } |
30 | |
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31 | sub _create_hand_optimized_type_constraint { |
32 | my $self = shift; |
33 | my $class = $self->class; |
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34 | $self->hand_optimized_type_constraint( |
35 | sub { |
36 | blessed( $_[0] ) && $_[0]->isa($class) |
37 | } |
38 | ); |
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39 | } |
40 | |
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41 | sub parents { |
42 | my $self = shift; |
43 | return ( |
44 | $self->parent, |
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45 | map { |
46 | # FIXME find_type_constraint might find a TC named after the class but that isn't really it |
47 | # I did this anyway since it's a convention that preceded TypeConstraint::Class, and it should DWIM |
48 | # if anybody thinks this problematic please discuss on IRC. |
49 | # a possible fix is to add by attr indexing to the type registry to find types of a certain property |
50 | # regardless of their name |
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51 | Moose::Util::TypeConstraints::find_type_constraint($_) |
52 | || |
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53 | __PACKAGE__->new( class => $_, name => "__ANON__" ) |
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54 | } $self->class->meta->superclasses, |
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55 | ); |
56 | } |
57 | |
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58 | sub equals { |
59 | my ( $self, $type_or_name ) = @_; |
60 | |
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61 | my $other = Moose::Util::TypeConstraints::find_type_constraint($type_or_name); |
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62 | |
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63 | return unless $other->isa(__PACKAGE__); |
64 | |
65 | return $self->class eq $other->class; |
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66 | } |
67 | |
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68 | sub is_a_type_of { |
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69 | my ($self, $type_or_name) = @_; |
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70 | |
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71 | my $type = Moose::Util::TypeConstraints::find_type_constraint($type_or_name); |
72 | |
73 | ($self->equals($type) || $self->is_subtype_of($type_or_name)); |
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74 | } |
75 | |
76 | sub is_subtype_of { |
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77 | my ($self, $type_or_name_or_class ) = @_; |
78 | |
79 | if ( not ref $type_or_name_or_class ) { |
80 | # it might be a class |
81 | return 1 if $self->class->isa( $type_or_name_or_class ); |
82 | } |
83 | |
84 | my $type = Moose::Util::TypeConstraints::find_type_constraint($type_or_name_or_class); |
85 | |
86 | if ( $type->isa(__PACKAGE__) ) { |
87 | # if $type_or_name_or_class isn't a class, it might be the TC name of another ::Class type |
88 | # or it could also just be a type object in this branch |
89 | return $self->class->isa( $type->class ); |
90 | } else { |
91 | # the only other thing we are a subtype of is Object |
92 | $self->SUPER::is_subtype_of($type); |
93 | } |
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94 | } |
95 | |
96 | 1; |
97 | |
98 | __END__ |
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99 | |
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100 | =pod |
101 | |
102 | =head1 NAME |
103 | |
104 | Moose::Meta::TypeConstraint::Class - Class/TypeConstraint parallel hierarchy |
105 | |
106 | =head1 METHODS |
107 | |
108 | =over 4 |
109 | |
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110 | =item B<new> |
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111 | |
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112 | =item B<class> |
113 | |
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114 | =item B<hand_optimized_type_constraint> |
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115 | |
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116 | =item B<has_hand_optimized_type_constraint> |
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117 | |
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118 | =item B<equals> |
119 | |
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120 | =item B<is_a_type_of> |
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121 | |
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122 | =item B<is_subtype_of> |
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123 | |
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124 | =item B<parents> |
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125 | |
126 | Return all the parent types, corresponding to the parent classes. |
127 | |
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128 | =item B<meta> |
129 | |
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130 | =back |
131 | |
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132 | =head1 BUGS |
133 | |
134 | All complex software has bugs lurking in it, and this module is no |
135 | exception. If you find a bug please either email me, or add the bug |
136 | to cpan-RT. |
137 | |
138 | =head1 AUTHOR |
139 | |
140 | Yuval Kogman E<lt>nothingmuch@cpan.orgE<gt> |
141 | |
142 | =head1 COPYRIGHT AND LICENSE |
143 | |
144 | Copyright 2006-2008 by Infinity Interactive, Inc. |
145 | |
146 | L<http://www.iinteractive.com> |
147 | |
148 | This library is free software; you can redistribute it and/or modify |
149 | it under the same terms as Perl itself. |
150 | |
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151 | =cut |