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1 | package MooseX::Types::UndefinedType; |
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2 | |
3 | =cut |
4 | |
5 | use warnings; |
6 | use strict; |
7 | |
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8 | use Moose::Util::TypeConstraints (); |
9 | use Carp::Clan qw( ^MooseX::Types ); |
10 | |
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11 | use overload '""' => sub { shift->name }, |
12 | fallback => 1; |
13 | |
14 | =head1 DESCRIPTION |
15 | |
16 | Whenever a type handle function (e.g. C<Int()> can't find a type |
17 | constraint under it's full name, it assumes it has not yet been defined. |
18 | It will then return an instance of this class, handling only |
19 | stringification, name and possible identification of undefined types. |
20 | |
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21 | Later, when you try to use the Undefined Type Constraint, autovivification will |
22 | be attempted. |
23 | |
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24 | =head1 METHODS |
25 | |
26 | =head2 new |
27 | |
28 | Takes a full type name as argument and returns an instance of this |
29 | class. |
30 | |
31 | =cut |
32 | |
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33 | sub new { |
34 | return bless { name => $_[1] }, $_[0]; |
35 | } |
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36 | |
37 | =head2 name |
38 | |
39 | Returns the stored type name. |
40 | |
41 | =cut |
42 | |
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43 | sub name { |
44 | return $_[0]->{name}; |
45 | } |
46 | |
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47 | =head2 can_be_inlined |
48 | |
49 | Always returns false. Needed for compatbility with Moose 2.0100+. |
50 | |
51 | =cut |
52 | |
53 | sub can_be_inlined { 0 } |
54 | |
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55 | =head2 __autovivify |
56 | |
57 | Try to see if the type constraint has yet been defined and if so create it. |
58 | |
59 | =cut |
60 | |
61 | sub __autovivify { |
62 | my ($self) = @_; |
63 | if(my $tc = $self->{instance}) { |
64 | return $tc; |
65 | } elsif( my $new_tc = Moose::Util::TypeConstraints::find_type_constraint($self->name)) { |
66 | $self->{instance} = $new_tc; |
67 | return $new_tc; |
68 | } else { |
69 | return; |
70 | } |
71 | } |
72 | |
73 | =head2 AUTOLOAD |
74 | |
75 | Try to autovivify and delegate |
76 | |
77 | =cut |
78 | |
79 | sub AUTOLOAD { |
80 | my ($self, @args) = @_; |
81 | my ($method) = our $AUTOLOAD =~ /([^:]+)$/; |
82 | |
83 | if(my $type_constraint = $self->__autovivify) { |
84 | return $type_constraint->$method(@args); |
85 | } else { |
86 | croak "Method '$method' is not supported for " . $self->name; |
87 | } |
88 | } |
89 | |
90 | =head2 DESTROY |
91 | |
92 | Moose::Meta::TypeConstraint::Parameterizable complains if this isn't here. TODO |
93 | to find out why. |
94 | |
95 | =cut |
96 | |
97 | sub DESTROY { |
98 | return; |
99 | } |
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100 | |
101 | =head1 SEE ALSO |
102 | |
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103 | L<MooseX::Types::Moose>, |
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104 | L<Moose::Util::TypeConstraints>, |
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105 | L<Moose::Meta::TypeConstraint>, |
106 | L<Carp::Clan> |
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107 | |
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108 | =head1 LICENSE |
109 | |
110 | This program is free software; you can redistribute it and/or modify |
111 | it under the same terms as perl itself. |
112 | |
113 | =cut |
114 | |
115 | |
116 | 1; |