---
name: "MooseX::UndefTolerant::Attribute"
section: "3pm"
platform: "linux"
package: "libmoosex-undeftolerant-perl"
version: "0.21-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/MooseX::UndefTolerant::Attribute"
---

# MooseX::UndefTolerant::Attribute(3pm)

Make your attribute(s) tolerant to undef initialization

## NAME

MooseX::UndefTolerant::Attribute - Make your attribute(s) tolerant to undef initialization

## VERSION

version 0.21

## SYNOPSIS

```
  package My:Class;
  use Moose;
  use MooseX::UndefTolerant::Attribute;
  has 'bar' => (
      traits => [ qw(MooseX::UndefTolerant::Attribute)],
      is => 'ro',
      isa => 'Num',
      predicate => 'has_bar'
  );
  # Meanwhile, under the city...
  # Doesn't explode
  my $class = My::Class->new(bar => undef);
  $class->has_bar # False!
```

## DESCRIPTION

Applying this trait to your attribute makes its initialization tolerant of of undef.  If you specify the value of undef to any of the attributes they will not be initialized (or will be set to the default, if applicable). Effectively behaving as if you had not provided a value at all.

## SUPPORT

Bugs may be submitted through the RT bug tracker \<https://rt.cpan.org/Public/Dist/Display.html?Name=MooseX-UndefTolerant\> (or bug-MooseX-UndefTolerant@rt.cpan.org \<mailto:bug-MooseX-UndefTolerant@rt.cpan.org\>).

There is also a mailing list available for users of this distribution, at \<http://lists.perl.org/list/moose.html\>.

There is also an irc channel available for users of this distribution, at `"#moose"` on `"irc.perl.org"` \<irc://irc.perl.org/#moose\>.

## AUTHOR

Cory G Watson \<gphat at cpan.org\>

## COPYRIGHT AND LICENSE

This software is copyright (c) 2011 by Cory G Watson.

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