# man > Specio::Constraint::Enum(3pm)

## NAME
    [Specio::Constraint::Enum](https://www.chedong.com/phpMan.php/perldoc/Specio%3A%3AConstraint%3A%3AEnum/markdown) - A class for constraints which require a string matching one of a set
    of values

## VERSION
    version 0.47

## SYNOPSIS
        my $type = [Specio::Constraint::Enum](https://www.chedong.com/phpMan.php/perldoc/Specio%3A%3AConstraint%3A%3AEnum/markdown)->new(...);
        print $_, "\n" for @{ $type->values };

## DESCRIPTION
    This is a specialized type constraint class for types which require a string that matches one of
    a list of values.

## 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::Enum](https://www.chedong.com/phpMan.php/perldoc/Specio%3A%3AConstraint%3A%3AEnum/markdown)->new( ... )
    The "parent" parameter is ignored if it passed, as it is always set to the "Str" type.

    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, "values". This must be a an arrayref of
    valid strings for the type.

  $enum->values
    Returns an array reference of valid values for the type.

## 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.