| 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 |
|---|---|---|---|---|---|
| 0 | 0 | 0 | 0s | 0s | Moose::Meta::TypeConstraint::Parameterizable::BEGIN |
| 0 | 0 | 0 | 0s | 0s | Moose::Meta::TypeConstraint::Parameterizable::__ANON__[:42] |
| 0 | 0 | 0 | 0s | 0s | Moose::Meta::TypeConstraint::Parameterizable::_can_coerce_constraint_from |
| 0 | 0 | 0 | 0s | 0s | Moose::Meta::TypeConstraint::Parameterizable::_parse_type_parameter |
| 0 | 0 | 0 | 0s | 0s | Moose::Meta::TypeConstraint::Parameterizable::generate_constraint_for |
| 0 | 0 | 0 | 0s | 0s | Moose::Meta::TypeConstraint::Parameterizable::parameterize |
| 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 |