05-26-2014
Quote:
Originally Posted by
alister
I would suggest using a tagged union and leaving the initial structs as they were:
Bad advice! Very dangerous! Unions do not work that way!
If you don't add the 'type' value to the structures, then it
won't work properly in the union! It will refer to some other member.
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LEARN ABOUT MOJAVE
moose::meta::typecoercion::union5.18
Moose::Meta::TypeCoercion::Union(3) User Contributed Perl Documentation Moose::Meta::TypeCoercion::Union(3)
NAME
Moose::Meta::TypeCoercion::Union - The Moose Type Coercion metaclass for Unions
VERSION
version 2.1202
DESCRIPTION
This is a subclass of Moose::Meta::TypeCoercion that is used for Moose::Meta::TypeConstraint::Union objects. =head1 METHODS
$coercion->has_coercion_for_type
This method always returns false.
$coercion->add_type_coercions
This method always throws an error. You cannot add coercions to a union type coercion.
$coercion->coerce($value)
This method will coerce by trying the coercions for each type in the union.
BUGS
See "BUGS" in Moose for details on reporting bugs.
AUTHORS
o Stevan Little <stevan.little@iinteractive.com>
o Dave Rolsky <autarch@urth.org>
o Jesse Luehrs <doy@tozt.net>
o Shawn M Moore <code@sartak.org>
o XXXX XXX'XX (Yuval Kogman) <nothingmuch@woobling.org>
o Karen Etheridge <ether@cpan.org>
o Florian Ragwitz <rafl@debian.org>
o Hans Dieter Pearcey <hdp@weftsoar.net>
o Chris Prather <chris@prather.org>
o Matt S Trout <mst@shadowcat.co.uk>
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.
perl v5.18.2 2014-01-19 Moose::Meta::TypeCoercion::Union(3)