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For t/test-parsing
  Run on Sun Nov 14 09:49:57 2010
Reported on Sun Nov 14 09:50:08 2010

File /usr/local/lib/perl/5.10.0/Moose/Meta/TypeConstraint/Parameterizable.pm
Statements Executed 23
Total Time 0.0007143 seconds
Subroutines — ordered by exclusive time
Calls P F Exclusive
Time
Inclusive
Time
Subroutine
0000s0sMoose::Meta::TypeConstraint::Parameterizable::::BEGINMoose::Meta::TypeConstraint::Parameterizable::BEGIN
0000s0sMoose::Meta::TypeConstraint::Parameterizable::::__ANON__[:42]Moose::Meta::TypeConstraint::Parameterizable::__ANON__[:42]
0000s0sMoose::Meta::TypeConstraint::Parameterizable::::_can_coerce_constraint_fromMoose::Meta::TypeConstraint::Parameterizable::_can_coerce_constraint_from
0000s0sMoose::Meta::TypeConstraint::Parameterizable::::_parse_type_parameterMoose::Meta::TypeConstraint::Parameterizable::_parse_type_parameter
0000s0sMoose::Meta::TypeConstraint::Parameterizable::::generate_constraint_forMoose::Meta::TypeConstraint::Parameterizable::generate_constraint_for
0000s0sMoose::Meta::TypeConstraint::Parameterizable::::parameterizeMoose::Meta::TypeConstraint::Parameterizable::parameterize
LineStmts.Exclusive
Time
Avg.Code
1package Moose::Meta::TypeConstraint::Parameterizable;
2
3330µs10µsuse strict;
# spent 14µs making 1 call to strict::import
4327µs9µsuse warnings;
# spent 31µs making 1 call to warnings::import
5392µs31µsuse metaclass;
# spent 811µs making 1 call to metaclass::import
6
71700ns700nsour $VERSION = '1.15';
8126µs26µs$VERSION = eval $VERSION;
91500ns500nsour $AUTHORITY = 'cpan:STEVAN';
10
11327µs9µsuse base 'Moose::Meta::TypeConstraint';
# spent 76µs making 1 call to base::import
12332µs11µsuse Moose::Meta::TypeConstraint::Parameterized;
# spent 4µs making 1 call to import
133444µs148µsuse Moose::Util::TypeConstraints ();
14
15123µs23µs__PACKAGE__->meta->add_attribute('constraint_generator' => (
16 accessor => 'constraint_generator',
17 predicate => 'has_constraint_generator',
18));
19
20sub generate_constraint_for {
21 my ($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
35sub _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 $constraint->(@_);
42 };
43}
44
45sub _parse_type_parameter {
46 my ($self, $type_parameter) = @_;
47 return Moose::Util::TypeConstraints::find_or_create_isa_type_constraint($type_parameter);
48}
49
50sub 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
82113µs13µs1;
83
84__END__
85
86
87=pod
88
89=head1 NAME
90
91Moose::Meta::TypeConstraint::Parameterizable - Type constraints which can take a parameter (ArrayRef)
92
93=head1 DESCRIPTION
94
95This class represents a parameterizable type constraint. This is a
96type constraint like C<ArrayRef> or C<HashRef>, that can be
97parameterized and made more specific by specifying a contained
98type. For example, instead of just an C<ArrayRef> of anything, you can
99specify that is an C<ArrayRef[Int]>.
100
101A parameterizable constraint should not be used as an attribute type
102constraint. Instead, when parameterized it creates a
103L<Moose::Meta::TypeConstraint::Parameterized> which should be used.
104
105=head1 INHERITANCE
106
107C<Moose::Meta::TypeConstraint::Parameterizable> is a subclass of
108L<Moose::Meta::TypeConstraint>.
109
110=head1 METHODS
111
112This class is intentionally not documented because the API is
113confusing and needs some work.
114
115=head1 BUGS
116
117See L<Moose/BUGS> for details on reporting bugs.
118
119=head1 AUTHOR
120
121Stevan Little E<lt>stevan@iinteractive.comE<gt>
122
123=head1 COPYRIGHT AND LICENSE
124
125Copyright 2006-2010 by Infinity Interactive, Inc.
126
127L<http://www.iinteractive.com>
128
129This library is free software; you can redistribute it and/or modify
130it under the same terms as Perl itself.
131
132=cut