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1 | package Moose::Meta::TypeConstraint::Enum; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | use metaclass; |
6 | |
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7 | use Moose::Util::TypeConstraints (); |
8 | |
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9 | our $VERSION = '0.53'; |
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10 | our $AUTHORITY = 'cpan:STEVAN'; |
11 | |
12 | use base 'Moose::Meta::TypeConstraint'; |
13 | |
14 | __PACKAGE__->meta->add_attribute('values' => ( |
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15 | accessor => 'values', |
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16 | )); |
17 | |
18 | sub new { |
19 | my ( $class, %args ) = @_; |
20 | |
21 | $args{parent} = Moose::Util::TypeConstraints::find_type_constraint('Str'); |
22 | |
23 | my $self = $class->meta->new_object(%args); |
24 | |
25 | $self->compile_type_constraint() |
26 | unless $self->_has_compiled_type_constraint; |
27 | |
28 | return $self; |
29 | } |
30 | |
31 | sub equals { |
32 | my ( $self, $type_or_name ) = @_; |
33 | |
34 | my $other = Moose::Util::TypeConstraints::find_type_constraint($type_or_name); |
35 | |
36 | return unless $other->isa(__PACKAGE__); |
37 | |
38 | my @self_values = sort @{ $self->values }; |
39 | my @other_values = sort @{ $other->values }; |
40 | |
41 | return unless @self_values == @other_values; |
42 | |
43 | while ( @self_values ) { |
44 | my $value = shift @self_values; |
45 | my $other_value = shift @other_values; |
46 | |
47 | return unless $value eq $other_value; |
48 | } |
49 | |
50 | return 1; |
51 | } |
52 | |
53 | sub constraint { |
54 | my $self = shift; |
55 | |
56 | my %values = map { $_ => undef } @{ $self->values }; |
57 | |
58 | return sub { exists $values{$_[0]} }; |
59 | } |
60 | |
61 | sub _compile_hand_optimized_type_constraint { |
62 | my $self = shift; |
63 | |
64 | my %values = map { $_ => undef } @{ $self->values }; |
65 | |
66 | sub { defined($_[0]) && !ref($_[0]) && exists $values{$_[0]} }; |
67 | } |
68 | |
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69 | 1; |
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70 | |
71 | __END__ |
72 | |
73 | =pod |
74 | |
75 | =head1 NAME |
76 | |
77 | Moose::Meta::TypeConstraint::Enum - Type constraint for enumerated values. |
78 | |
79 | =head1 METHODS |
80 | |
81 | =over 4 |
82 | |
83 | =item B<new> |
84 | |
85 | =item B<equals> |
86 | |
87 | =item B<constraint> |
88 | |
89 | =item B<values> |
90 | |
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91 | =item B<meta> |
92 | |
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93 | =back |
94 | |
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95 | =head1 BUGS |
96 | |
97 | All complex software has bugs lurking in it, and this module is no |
98 | exception. If you find a bug please either email me, or add the bug |
99 | to cpan-RT. |
100 | |
101 | =head1 AUTHOR |
102 | |
103 | Yuval Kogman E<lt>nothingmuch@cpan.orgE<gt> |
104 | |
105 | =head1 COPYRIGHT AND LICENSE |
106 | |
107 | Copyright 2006-2008 by Infinity Interactive, Inc. |
108 | |
109 | L<http://www.iinteractive.com> |
110 | |
111 | This library is free software; you can redistribute it and/or modify |
112 | it under the same terms as Perl itself. |
113 | |
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114 | =cut |
115 | |
116 | |