X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FMoose%2FMeta%2FTypeConstraint%2FEnum.pm;h=54b558120be59a92754b7664d30932d6ec3d4c40;hb=462bdc732ebe32abf5b9f3cd40033540a5f1388f;hp=588c7276831039392783e9651291d46528ce5310;hpb=c7d8fe950098e91780355ed7a91f066e682eb4a3;p=gitmo%2FMoose.git

diff --git a/lib/Moose/Meta/TypeConstraint/Enum.pm b/lib/Moose/Meta/TypeConstraint/Enum.pm
index 588c727..54b5581 100644
--- a/lib/Moose/Meta/TypeConstraint/Enum.pm
+++ b/lib/Moose/Meta/TypeConstraint/Enum.pm
@@ -6,10 +6,6 @@ use metaclass;
 
 use Moose::Util::TypeConstraints ();
 
-our $VERSION   = '0.55_02';
-$VERSION = eval $VERSION;
-our $AUTHORITY = 'cpan:STEVAN';
-
 use base 'Moose::Meta::TypeConstraint';
 
 __PACKAGE__->meta->add_attribute('values' => (
@@ -21,6 +17,22 @@ sub new {
 
     $args{parent} = Moose::Util::TypeConstraints::find_type_constraint('Str');
 
+    if ( scalar @{ $args{values} } < 2 ) {
+        require Moose;
+        Moose->throw_error("You must have at least two values to enumerate through");
+    }
+
+    for (@{ $args{values} }) {
+        if (!defined($_)) {
+            require Moose;
+            Moose->throw_error("Enum values must be strings, not undef");
+        }
+        elsif (ref($_)) {
+            require Moose;
+            Moose->throw_error("Enum values must be strings, not '$_'");
+        }
+    }
+
     my $self = $class->_new(\%args);
 
     $self->compile_type_constraint()
@@ -67,50 +79,64 @@ sub _compile_hand_optimized_type_constraint {
     sub { defined($_[0]) && !ref($_[0]) && exists $values{$_[0]} };
 }
 
+sub create_child_type {
+    my ($self, @args) = @_;
+    return Moose::Meta::TypeConstraint->new(@args, parent => $self);
+}
+
 1;
 
+# ABSTRACT: Type constraint for enumerated values.
+
 __END__
 
 =pod
 
-=head1 NAME
+=head1 DESCRIPTION
 
-Moose::Meta::TypeConstraint::Enum - Type constraint for enumerated values.
+This class represents type constraints based on an enumerated list of
+acceptable values.
 
-=head1 METHODS
+=head1 INHERITANCE
 
-=over 4
+C<Moose::Meta::TypeConstraint::Enum> is a subclass of
+L<Moose::Meta::TypeConstraint>.
 
-=item B<new>
+=head1 METHODS
 
-=item B<equals>
+=over 4
 
-=item B<constraint>
+=item B<< Moose::Meta::TypeConstraint::Enum->new(%options) >>
 
-=item B<values>
+This creates a new enum type constraint based on the given
+C<%options>.
 
-=item B<meta>
+It takes the same options as its parent, with several
+exceptions. First, it requires an additional option, C<values>. This
+should be an array reference containing a list of valid string
+values. Second, it automatically sets the parent to the C<Str> type.
 
-=back
+Finally, it ignores any provided C<constraint> option. The constraint
+is generated automatically based on the provided C<values>.
 
-=head1 BUGS
+=item B<< $constraint->values >>
 
-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.
+Returns the array reference of acceptable values provided to the
+constructor.
 
-=head1 AUTHOR
+=item B<< $constraint->create_child_type >>
 
-Yuval Kogman E<lt>nothingmuch@cpan.orgE<gt>
+This returns a new L<Moose::Meta::TypeConstraint> object with the type
+as its parent.
 
-=head1 COPYRIGHT AND LICENSE
+Note that it does I<not> return a C<Moose::Meta::TypeConstraint::Enum>
+object!
 
-Copyright 2006-2008 by Infinity Interactive, Inc.
+=back
 
-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