# phpman > perldoc > Specio::Constraint::Intersection

## NAME
    [Specio::Constraint::Intersection](https://www.chedong.com/phpMan.php/perldoc/Specio%3A%3AConstraint%3A%3AIntersection/markdown) - A class for intersection constraints

## VERSION
    version 0.47

## SYNOPSIS
        my $type = [Specio::Constraint::Untion](https://www.chedong.com/phpMan.php/perldoc/Specio%3A%3AConstraint%3A%3AUntion/markdown)->new(...);

## DESCRIPTION
    This is a specialized type constraint class for intersections, which will allow a value which
    matches each one of several distinct types.

## API
    This class provides all of the same methods as [Specio::Constraint::Simple](https://www.chedong.com/phpMan.php/perldoc/Specio%3A%3AConstraint%3A%3ASimple/markdown), with a few
    differences:

  [Specio::Constraint::Intersection](https://www.chedong.com/phpMan.php/perldoc/Specio%3A%3AConstraint%3A%3AIntersection/markdown)->new( ... )
    The "parent" parameter is ignored if it passed, as it is always "undef"

    The "inline_generator" and "constraint" parameters are also ignored. This class provides its own
    default inline generator subroutine reference.

    Finally, this class requires an additional parameter, "of". This must be an arrayref of type
    objects.

  $union->of
    Returns an array reference of the individual types which makes up this intersection.

## ROLES
    This class does the [Specio::Constraint::Role::Interface](https://www.chedong.com/phpMan.php/perldoc/Specio%3A%3AConstraint%3A%3ARole%3A%3AInterface/markdown) and [Specio::Role::Inlinable](https://www.chedong.com/phpMan.php/perldoc/Specio%3A%3ARole%3A%3AInlinable/markdown) roles.

## SUPPORT
    Bugs may be submitted at <<https://github.com/houseabsolute/Specio/issues>>.

    I am also usually active on IRC as 'autarch' on "irc://irc.perl.org".

## SOURCE
    The source code repository for Specio can be found at <<https://github.com/houseabsolute/Specio>>.

## AUTHOR
    Dave Rolsky <<autarch@urth.org>>

## COPYRIGHT AND LICENSE
    This software is Copyright (c) 2012 - 2021 by Dave Rolsky.

    This is free software, licensed under:

      The Artistic License 2.0 (GPL Compatible)

    The full text of the license can be found in the LICENSE file included with this distribution.