use metaclass;
use Scalar::Util 'blessed';
-use Carp 'confess';
use Moose::Util::TypeConstraints;
+use Moose::Meta::TypeConstraint::Parameterizable;
-our $VERSION = '0.02';
+our $VERSION = '0.75_01';
+$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";
-
- 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 $name = $self->parent->name;
-
- my $array_coercion =
- Moose::Util::TypeConstraints::find_type_constraint('ArrayRef')
- ->coercion;
-
- my $hash_coercion =
- Moose::Util::TypeConstraints::find_type_constraint('HashRef')
- ->coercion;
-
- # ArrayRef[Foo] will check each element for the Foo constraint
- my $array_constraint = sub {
- foreach my $x (@$_) {
- ($type_parameter->check($x)) || return
- } 1;
- };
-
- # HashRef[Foo] will check each value for the Foo constraint
- my $hash_constraint = sub {
- foreach my $x (values %$_) {
- ($type_parameter->check($x)) || return
- } 1;
- };
-
- # if this is a subtype of ArrayRef, then we can use the ArrayRef[Foo]
- # constraint directly
- if ($self->is_subtype_of('ArrayRef')) {
- $constraint = $array_constraint;
- }
- # if this is a subtype of HashRef, then we can use the HashRef[Foo]
- # constraint directly
- elsif ($self->is_subtype_of('HashRef')) {
- $constraint = $hash_constraint;
- }
- # if we can coerce this type to an ArrayRef, do it and use the regular
- # ArrayRef[Foo] constraint
- elsif ($array_coercion && $array_coercion->has_coercion_for_type($name)) {
- $constraint = sub {
- local $_ = $array_coercion->coerce($_);
- $array_constraint->(@_);
- };
+
+ unless ( $self->has_type_parameter ) {
+ require Moose;
+ Moose->throw_error("You cannot create a Higher Order type without a type parameter");
}
- # if we can coerce this type to a HashRef, do it and use the regular
- # HashRef[Foo] constraint
- elsif ($hash_coercion && $hash_coercion->has_coercion_for_type($name)) {
- $constraint = sub {
- local $_ = $hash_coercion->coerce($_);
- $hash_constraint->(@_);
- };
+
+ my $type_parameter = $self->type_parameter;
+
+ unless ( blessed $type_parameter && $type_parameter->isa('Moose::Meta::TypeConstraint') ) {
+ require Moose;
+ Moose->throw_error("The type parameter must be a Moose meta type");
}
- else {
- confess "The " . $self->name . " constraint cannot be used, because " . $name . " doesn't subtype or coerce ArrayRef or HashRef.";
+
+ 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
+ require Moose;
+ 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;
=head1 NAME
-Moose::Meta::TypeConstraint::Parameterized - Higher Order type constraints for Moose
+Moose::Meta::TypeConstraint::Parameterized - Type constraints with a bound parameter (ArrayRef[Int])
=head1 METHODS
-=over 4
-
-=item B<compile_type_constraint>
-
-=item B<type_parameter>
-
-=item B<has_type_parameter>
+This class is intentionally not documented because the API is
+confusing and needs some work.
-=item B<meta>
+=head1 INHERITANCE
-=back
+C<Moose::Meta::TypeConstraint::Parameterized> is a subclass of
+L<Moose::Meta::TypeConstraint>.
=head1 BUGS
-All complex software has bugs lurking in it, and this module is no
+All complex software has bugs lurking in it, and this module is no
exception. If you find a bug please either email me, or add the bug
to cpan-RT.
=head1 COPYRIGHT AND LICENSE
-Copyright 2006-2008 by Infinity Interactive, Inc.
+Copyright 2006-2009 by Infinity Interactive, Inc.
L<http://www.iinteractive.com>