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|
package Moose::Meta::TypeConstraint::Parameterized;
our $VERSION = '2.4000';
use strict;
use warnings;
use metaclass;
use Scalar::Util 'blessed';
use Moose::Util::TypeConstraints;
use Moose::Meta::TypeConstraint::Parameterizable;
use Moose::Util 'throw_exception';
use parent 'Moose::Meta::TypeConstraint';
__PACKAGE__->meta->add_attribute('type_parameter' => (
accessor => 'type_parameter',
predicate => 'has_type_parameter',
Class::MOP::_definition_context(),
));
__PACKAGE__->meta->add_attribute('parameterized_from' => (
accessor => 'parameterized_from',
predicate => 'has_parameterized_from',
Class::MOP::_definition_context(),
));
sub equals {
my ( $self, $type_or_name ) = @_;
my $other = Moose::Util::TypeConstraints::find_type_constraint($type_or_name);
return unless $other->isa(__PACKAGE__);
return (
$self->type_parameter->equals( $other->type_parameter )
and
$self->parent->equals( $other->parent )
);
}
sub compile_type_constraint {
my $self = shift;
unless ( $self->has_type_parameter ) {
throw_exception( CannotCreateHigherOrderTypeWithoutATypeParameter => type_name => $self->name );
}
my $type_parameter = $self->type_parameter;
unless ( blessed $type_parameter && $type_parameter->isa('Moose::Meta::TypeConstraint') ) {
throw_exception( TypeParameterMustBeMooseMetaType => type_name => $self->name );
}
foreach my $type (Moose::Util::TypeConstraints::get_all_parameterizable_types()) {
if (my $constraint = $type->generate_constraint_for($self)) {
$self->_set_constraint($constraint);
return $self->SUPER::compile_type_constraint;
}
}
# if we get here, then we couldn't
# find a way to parameterize this type
throw_exception( TypeConstraintCannotBeUsedForAParameterizableType => type_name => $self->name,
parent_type_name => $self->parent->name,
);
}
sub can_be_inlined {
my $self = shift;
return
$self->has_parameterized_from
&& $self->parameterized_from->has_inline_generator
&& $self->type_parameter->can_be_inlined;
}
sub inline_environment {
my $self = shift;
return {
($self->has_parameterized_from
? (%{ $self->parameterized_from->inline_environment })
: ()),
($self->has_type_parameter
? (%{ $self->type_parameter->inline_environment })
: ()),
};
}
sub _inline_check {
my $self = shift;
return unless $self->can_be_inlined;
return $self->parameterized_from->generate_inline_for( $self->type_parameter, @_ );
}
sub create_child_type {
my ($self, %opts) = @_;
return Moose::Meta::TypeConstraint::Parameterizable->new(%opts, parent=>$self);
}
1;
# ABSTRACT: Type constraints with a bound parameter (ArrayRef[Int])
__END__
=pod
=encoding UTF-8
=head1 NAME
Moose::Meta::TypeConstraint::Parameterized - Type constraints with a bound parameter (ArrayRef[Int])
=head1 VERSION
version 2.4000
=head1 METHODS
This class is intentionally not documented because the API is
confusing and needs some work.
=head1 INHERITANCE
C<Moose::Meta::TypeConstraint::Parameterized> is a subclass of
L<Moose::Meta::TypeConstraint>.
=head1 BUGS
See L<Moose/BUGS> for details on reporting bugs.
=head1 AUTHORS
=over 4
=item *
Stevan Little <stevan@cpan.org>
=item *
Dave Rolsky <autarch@urth.org>
=item *
Jesse Luehrs <doy@cpan.org>
=item *
Shawn M Moore <sartak@cpan.org>
=item *
יובל קוג'מן (Yuval Kogman) <nothingmuch@woobling.org>
=item *
Karen Etheridge <ether@cpan.org>
=item *
Florian Ragwitz <rafl@debian.org>
=item *
Hans Dieter Pearcey <hdp@cpan.org>
=item *
Chris Prather <chris@prather.org>
=item *
Matt S Trout <mstrout@cpan.org>
=back
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2006 by Infinity Interactive, Inc.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut
|
