Type::Tiny::Union(3p)

NAME
Type::Tiny::Union - union type constraints

SYNOPSIS
Using via the "|" operator overload:

  package Local::Stash {
    use Moo;
    use Types::Common qw( ArrayRef HashRef );

    has data => (
      is   => 'ro',
      isa  => HashRef | ArrayRef,
    );
  }

  my $x = Local::Stash->new( data => {} );  # ok
  my $y = Local::Stash->new( data => [] );  # ok

Using Type::Tiny::Union's object-oriented interface:

  package Local::Stash {
    use Moo;
    use Types::Common qw( ArrayRef HashRef );
    use Type::Tiny::Union;

    my $AnyData = Type::Tiny::Union->new(
      name             => 'AnyData',
      type_constraints => [ HashRef, ArrayRef ],
    );

    has data => (
      is   => 'ro',
      isa  => $AnyData,
    );
  }

Using Type::Utils's functional interface:

  package Local::Stash {
    use Moo;
    use Types::Common qw( ArrayRef HashRef );
    use Type::Utils;

    my $AnyData = union AnyData => [ HashRef, ArrayRef ];

    has data => (
      is   => 'ro',
      isa  => $AnyData,
    );
  }

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

DESCRIPTION
Union type constraints.

This package inherits from Type::Tiny; see that for most documentation. Major differences are listed below:

  Constructor
The "new" constructor from Type::Tiny still works, of course. But there is also:

new_by_overload(%attributes)
    Like the "new" constructor, but will sometimes return another type constraint which is not strictly an instance of Type::Tiny::Union, but still encapsulates the same meaning. This constructor is used by Type::Tiny's overloading of the "|" operator.

  Attributes

"type_constraints"
    Arrayref of type constraints.

    When passed to the constructor, if any of the type constraints in the union is itself a union type constraint, this is "exploded" into the new union.

"constraint"
    Unlike Type::Tiny, you cannot pass a constraint coderef to the constructor. Instead rely on the default.

"inlined"
    Unlike Type::Tiny, you cannot pass an inlining coderef to the constructor. Instead rely on the default.

"parent"
    Unlike Type::Tiny, you cannot pass an inlining coderef to the constructor. A parent will instead be automatically calculated.

"coercion"
    You probably do not pass this to the constructor. (It's not currently disallowed, as there may be a use for it that I haven't thought of.)

    The auto-generated default will be a Type::Coercion::Union object.

  Methods

find_type_for($value)
    Returns the first individual type constraint in the union which $value passes.

stringifies_to($constraint)
    See Type::Tiny::ConstrainedObject.

numifies_to($constraint)
    See Type::Tiny::ConstrainedObject.

"with_attribute_values($attr1 => $constraint1, ...)"
    See Type::Tiny::ConstrainedObject.

  Overloading

•   Arrayrefification calls "type_constraints".

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

SEE ALSO
Type::Tiny::Manual.

Type::Tiny.

AUTHOR
Toby Inkster <tobyink@cpan.org>.

COPYRIGHT AND LICENCE
This software is copyright (c) 2013-2014, 2017-2025 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.