use metaclass;
use Scalar::Util 'blessed';
-use Carp 'confess';
+use Moose::Util::TypeConstraints;
+use Moose::Meta::TypeConstraint::Parameterizable;
-our $VERSION = '0.01';
+our $VERSION = '0.66';
+$VERSION = eval $VERSION;
our $AUTHORITY = 'cpan:STEVAN';
use base 'Moose::Meta::TypeConstraint';
predicate => 'has_type_parameter',
));
+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 $self = shift;
($self->has_type_parameter)
- || confess "You cannot create a Higher Order type without a type parameter";
+ || Moose->throw_error("You cannot create a Higher Order type without a type parameter");
my $type_parameter = $self->type_parameter;
(blessed $type_parameter && $type_parameter->isa('Moose::Meta::TypeConstraint'))
- || confess "The type parameter must be a Moose meta type";
-
- my $constraint;
-
- my $array_constraint = sub {
- foreach my $x (@$_) {
- ($type_parameter->check($x)) || return
- } 1;
- };
-
- my $hash_constraint = sub {
- foreach my $x (values %$_) {
- ($type_parameter->check($x)) || return
- } 1;
- };
-
- if ($self->is_subtype_of('ArrayRef')) {
- $constraint = $array_constraint;
- }
- elsif ($self->is_subtype_of('HashRef')) {
- $constraint = $hash_constraint;
- }
- else {
- confess "The " . $self->name . " constraint cannot be used, because " . $self->parent->name . " doesn't subtype ArrayRef or HashRef.";
+ || Moose->throw_error("The type parameter must be a Moose meta type");
+
+ 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;
+ }
}
- $self->_set_constraint($constraint);
-
- $self->SUPER::compile_type_constraint;
+ # if we get here, then we couldn't
+ # find a way to parameterize this type
+ Moose->throw_error("The " . $self->name . " constraint cannot be used, because "
+ . $self->parent->name . " doesn't subtype or coerce from a parameterizable type.");
+}
+
+sub create_child_type {
+ my ($self, %opts) = @_;
+ return Moose::Meta::TypeConstraint::Parameterizable->new(%opts, parent=>$self);
}
1;
Moose::Meta::TypeConstraint::Parameterized - Higher Order type constraints for Moose
-=head1 DESCRIPTION
-
=head1 METHODS
=over 4
=item B<meta>
+=item B<equals>
+
+=item B<create_child_type>
+
=back
=head1 BUGS
=head1 COPYRIGHT AND LICENSE
-Copyright 2006, 2007 by Infinity Interactive, Inc.
+Copyright 2006-2009 by Infinity Interactive, Inc.
L<http://www.iinteractive.com>