# phpman > perldoc > Type::Coercion::Union

## NAME
    [Type::Coercion::Union](https://www.chedong.com/phpMan.php/perldoc/Type%3A%3ACoercion%3A%3AUnion/markdown) - a set of coercions to a union type constraint

## STATUS
    This module is covered by the Type-Tiny stability policy.

## DESCRIPTION
    This package inherits from [Type::Coercion](https://www.chedong.com/phpMan.php/perldoc/Type%3A%3ACoercion/markdown); see that for most documentation. The major
    differences are that "add_type_coercions" always throws an exception, and the
    "type_coercion_map" is automatically populated from the child constraints of the union type
    constraint.

## BUGS
    Please report any bugs to <<https://github.com/tobyink/p5-type-tiny/issues>>.

## SEE ALSO
    [Type::Coercion](https://www.chedong.com/phpMan.php/perldoc/Type%3A%3ACoercion/markdown).

    [Moose::Meta::TypeCoercion::Union](https://www.chedong.com/phpMan.php/perldoc/Moose%3A%3AMeta%3A%3ATypeCoercion%3A%3AUnion/markdown).

## AUTHOR
    Toby Inkster <<tobyink@cpan.org>>.

## COPYRIGHT AND LICENCE
    This software is copyright (c) 2013-2014, 2017-2021 by Toby Inkster.

    This is free software; you can redistribute it and/or modify it under the same terms as the Perl
    5 programming language system itself.

## DISCLAIMER OF WARRANTIES
    THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
    WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
    PURPOSE.