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package Moose::Meta::TypeCoercion::Union;
our $VERSION = '2.4000';
use strict;
use warnings;
use metaclass;
use Scalar::Util 'blessed';
use parent 'Moose::Meta::TypeCoercion';
use Moose::Util 'throw_exception';
sub compile_type_coercion {
my $self = shift;
my $type_constraint = $self->type_constraint;
(blessed $type_constraint && $type_constraint->isa('Moose::Meta::TypeConstraint::Union'))
|| throw_exception( NeedsTypeConstraintUnionForTypeCoercionUnion => type_coercion_union_object => $self,
type_name => $type_constraint->name
);
$self->_compiled_type_coercion(
sub {
my $value = shift;
foreach my $type ( grep { $_->has_coercion }
@{ $type_constraint->type_constraints } ) {
my $temp = $type->coerce($value);
return $temp if $type_constraint->check($temp);
}
return $value;
}
);
}
sub has_coercion_for_type { 0 }
sub add_type_coercions {
my $self = shift;
throw_exception( CannotAddAdditionalTypeCoercionsToUnion => type_coercion_union_object => $self );
}
1;
# ABSTRACT: The Moose Type Coercion metaclass for Unions
__END__
=pod
=encoding UTF-8
=head1 NAME
Moose::Meta::TypeCoercion::Union - The Moose Type Coercion metaclass for Unions
=head1 VERSION
version 2.4000
=head1 DESCRIPTION
This is a subclass of L<Moose::Meta::TypeCoercion> that is used for
L<Moose::Meta::TypeConstraint::Union> objects.
=head1 METHODS
=head2 $coercion->has_coercion_for_type
This method always returns false.
=head2 $coercion->add_type_coercions
This method always throws an error. You cannot add coercions to a
union type coercion.
=head2 $coercion->coerce($value)
This method will coerce by trying the coercions for each type in the
union.
=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
|
