File | /usr/local/lib/perl/5.10.0/Moose/Meta/TypeConstraint/Parameterizable.pm |
Statements Executed | 23 |
Total Time | 0.0007143 seconds |
Calls | P | F | Exclusive Time |
Inclusive Time |
Subroutine |
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0 | 0 | 0 | 0s | 0s | BEGIN | Moose::Meta::TypeConstraint::Parameterizable::
0 | 0 | 0 | 0s | 0s | __ANON__[:42] | Moose::Meta::TypeConstraint::Parameterizable::
0 | 0 | 0 | 0s | 0s | _can_coerce_constraint_from | Moose::Meta::TypeConstraint::Parameterizable::
0 | 0 | 0 | 0s | 0s | _parse_type_parameter | Moose::Meta::TypeConstraint::Parameterizable::
0 | 0 | 0 | 0s | 0s | generate_constraint_for | Moose::Meta::TypeConstraint::Parameterizable::
0 | 0 | 0 | 0s | 0s | parameterize | Moose::Meta::TypeConstraint::Parameterizable::
Line | Stmts. | Exclusive Time | Avg. | Code |
---|---|---|---|---|
1 | package Moose::Meta::TypeConstraint::Parameterizable; | |||
2 | ||||
3 | 3 | 30µs | 10µs | use strict; # spent 14µs making 1 call to strict::import |
4 | 3 | 27µs | 9µs | use warnings; # spent 31µs making 1 call to warnings::import |
5 | 3 | 92µs | 31µs | use metaclass; # spent 811µs making 1 call to metaclass::import |
6 | ||||
7 | 1 | 700ns | 700ns | our $VERSION = '1.15'; |
8 | 1 | 26µs | 26µs | $VERSION = eval $VERSION; |
9 | 1 | 500ns | 500ns | our $AUTHORITY = 'cpan:STEVAN'; |
10 | ||||
11 | 3 | 27µs | 9µs | use base 'Moose::Meta::TypeConstraint'; # spent 76µs making 1 call to base::import |
12 | 3 | 32µs | 11µs | use Moose::Meta::TypeConstraint::Parameterized; # spent 4µs making 1 call to import |
13 | 3 | 444µs | 148µs | use Moose::Util::TypeConstraints (); |
14 | ||||
15 | 1 | 23µs | 23µs | __PACKAGE__->meta->add_attribute('constraint_generator' => ( # spent 904µs making 1 call to Class::MOP::Mixin::HasAttributes::add_attribute
# spent 34µs making 1 call to Moose::Meta::TypeConstraint::Parameterizable::meta |
16 | accessor => 'constraint_generator', | |||
17 | predicate => 'has_constraint_generator', | |||
18 | )); | |||
19 | ||||
20 | sub generate_constraint_for { | |||
21 | my ($self, $type) = @_; | |||
22 | ||||
23 | return unless $self->has_constraint_generator; | |||
24 | ||||
25 | return $self->constraint_generator->($type->type_parameter) | |||
26 | if $type->is_subtype_of($self->name); | |||
27 | ||||
28 | return $self->_can_coerce_constraint_from($type) | |||
29 | if $self->has_coercion | |||
30 | && $self->coercion->has_coercion_for_type($type->parent->name); | |||
31 | ||||
32 | return; | |||
33 | } | |||
34 | ||||
35 | sub _can_coerce_constraint_from { | |||
36 | my ($self, $type) = @_; | |||
37 | my $coercion = $self->coercion; | |||
38 | my $constraint = $self->constraint_generator->($type->type_parameter); | |||
39 | return sub { | |||
40 | local $_ = $coercion->coerce($_); | |||
41 | $constraint->(@_); | |||
42 | }; | |||
43 | } | |||
44 | ||||
45 | sub _parse_type_parameter { | |||
46 | my ($self, $type_parameter) = @_; | |||
47 | return Moose::Util::TypeConstraints::find_or_create_isa_type_constraint($type_parameter); | |||
48 | } | |||
49 | ||||
50 | sub parameterize { | |||
51 | my ($self, $type_parameter) = @_; | |||
52 | ||||
53 | my $contained_tc = $self->_parse_type_parameter($type_parameter); | |||
54 | ||||
55 | ## The type parameter should be a subtype of the parent's type parameter | |||
56 | ## if there is one. | |||
57 | ||||
58 | if(my $parent = $self->parent) { | |||
59 | if($parent->can('type_parameter')) { | |||
60 | unless ( $contained_tc->is_a_type_of($parent->type_parameter) ) { | |||
61 | require Moose; | |||
62 | Moose->throw_error("$type_parameter is not a subtype of ".$parent->type_parameter); | |||
63 | } | |||
64 | } | |||
65 | } | |||
66 | ||||
67 | if ( $contained_tc->isa('Moose::Meta::TypeConstraint') ) { | |||
68 | my $tc_name = $self->name . '[' . $contained_tc->name . ']'; | |||
69 | return Moose::Meta::TypeConstraint::Parameterized->new( | |||
70 | name => $tc_name, | |||
71 | parent => $self, | |||
72 | type_parameter => $contained_tc, | |||
73 | ); | |||
74 | } | |||
75 | else { | |||
76 | require Moose; | |||
77 | Moose->throw_error("The type parameter must be a Moose meta type"); | |||
78 | } | |||
79 | } | |||
80 | ||||
81 | ||||
82 | 1 | 13µs | 13µs | 1; |
83 | ||||
84 | __END__ | |||
85 | ||||
86 | ||||
87 | =pod | |||
88 | ||||
89 | =head1 NAME | |||
90 | ||||
91 | Moose::Meta::TypeConstraint::Parameterizable - Type constraints which can take a parameter (ArrayRef) | |||
92 | ||||
93 | =head1 DESCRIPTION | |||
94 | ||||
95 | This class represents a parameterizable type constraint. This is a | |||
96 | type constraint like C<ArrayRef> or C<HashRef>, that can be | |||
97 | parameterized and made more specific by specifying a contained | |||
98 | type. For example, instead of just an C<ArrayRef> of anything, you can | |||
99 | specify that is an C<ArrayRef[Int]>. | |||
100 | ||||
101 | A parameterizable constraint should not be used as an attribute type | |||
102 | constraint. Instead, when parameterized it creates a | |||
103 | L<Moose::Meta::TypeConstraint::Parameterized> which should be used. | |||
104 | ||||
105 | =head1 INHERITANCE | |||
106 | ||||
107 | C<Moose::Meta::TypeConstraint::Parameterizable> is a subclass of | |||
108 | L<Moose::Meta::TypeConstraint>. | |||
109 | ||||
110 | =head1 METHODS | |||
111 | ||||
112 | This class is intentionally not documented because the API is | |||
113 | confusing and needs some work. | |||
114 | ||||
115 | =head1 BUGS | |||
116 | ||||
117 | See L<Moose/BUGS> for details on reporting bugs. | |||
118 | ||||
119 | =head1 AUTHOR | |||
120 | ||||
121 | Stevan Little E<lt>stevan@iinteractive.comE<gt> | |||
122 | ||||
123 | =head1 COPYRIGHT AND LICENSE | |||
124 | ||||
125 | Copyright 2006-2010 by Infinity Interactive, Inc. | |||
126 | ||||
127 | L<http://www.iinteractive.com> | |||
128 | ||||
129 | This library is free software; you can redistribute it and/or modify | |||
130 | it under the same terms as Perl itself. | |||
131 | ||||
132 | =cut |