make github the primary repository

[gitmo/Moose.git] / lib / Moose / Meta / TypeConstraint / Parameterized.pm

diff --git a/lib/Moose/Meta/TypeConstraint/Parameterized.pm b/lib/Moose/Meta/TypeConstraint/Parameterized.pm
index f47efa4..175c9ab 100644 (file)
--- a/lib/Moose/Meta/TypeConstraint/Parameterized.pm
+++ b/lib/Moose/Meta/TypeConstraint/Parameterized.pm
@@ -5,102 +5,122 @@ use warnings;
 use metaclass;
 
 use Scalar::Util 'blessed';
-use Carp         'confess';
-
-our $VERSION   = '0.01';
-our $AUTHORITY = 'cpan:STEVAN';
+use Moose::Util::TypeConstraints;
+use Moose::Meta::TypeConstraint::Parameterizable;
 
 use base '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 $self = shift;
-    
-    ($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 $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;
+    unless ( $self->has_type_parameter ) {
+        require Moose;
+        Moose->throw_error("You cannot create a Higher Order type without a type parameter");
     }
-    else {
-        confess "The " . $self->name . " constraint cannot be used, because " . $self->parent->name . " doesn't subtype ArrayRef or HashRef.";
-    }
-    
-    $self->_set_constraint($constraint);
-    
-    $self->SUPER::compile_type_constraint;
-}
 
-1;
+    my $type_parameter = $self->type_parameter;
 
-__END__
+    unless ( blessed $type_parameter && $type_parameter->isa('Moose::Meta::TypeConstraint') ) {
+        require Moose;
+        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;
+        }
+    }
 
-=pod
+    # 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.");
+}
 
-=head1 NAME
+sub can_be_inlined {
+    my $self = shift;
 
-Moose::Meta::TypeConstraint::Parameterized - Higher Order type constraints for Moose
+    return
+           $self->has_parameterized_from
+        && $self->parameterized_from->has_inline_generator
+        && $self->type_parameter->can_be_inlined;
+}
 
-=head1 DESCRIPTION
+sub inline_environment {
+    my $self = shift;
 
-=head1 METHODS
+    return {
+        ($self->has_parameterized_from
+            ? (%{ $self->parameterized_from->inline_environment })
+            : ()),
+        ($self->has_type_parameter
+            ? (%{ $self->type_parameter->inline_environment })
+            : ()),
+    };
+}
 
-=over 4
+sub _inline_check {
+    my $self = shift;
 
-=item B<compile_type_constraint>
+    return unless $self->can_be_inlined;
 
-=item B<type_parameter>
+    return $self->parameterized_from->generate_inline_for( $self->type_parameter, @_ );
+}
 
-=item B<has_type_parameter>
+sub create_child_type {
+    my ($self, %opts) = @_;
+    return Moose::Meta::TypeConstraint::Parameterizable->new(%opts, parent=>$self);
+}
 
-=item B<meta>
+1;
 
-=back
+# ABSTRACT: Type constraints with a bound parameter (ArrayRef[Int])
 
-=head1 BUGS
+__END__
 
-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 AUTHOR
+=pod
+
+=head1 METHODS
 
-Stevan Little E<lt>stevan@iinteractive.comE<gt>
+This class is intentionally not documented because the API is
+confusing and needs some work.
 
-=head1 COPYRIGHT AND LICENSE
+=head1 INHERITANCE
 
-Copyright 2006, 2007 by Infinity Interactive, Inc.
+C<Moose::Meta::TypeConstraint::Parameterized> is a subclass of
+L<Moose::Meta::TypeConstraint>.
 
-L<http://www.iinteractive.com>
+=head1 BUGS
 
-This library is free software; you can redistribute it and/or modify
-it under the same terms as Perl itself.
+See L<Moose/BUGS> for details on reporting bugs.
 
 =cut