NAME

Types::DualVar - type constraint for dualvars

SYNOPSIS

   package MyClass {
      use Moo;
      use Types::Common::Numeric qw( PositiveInt );
      use Types::DualVar qw( DualVar );
      
      has attr => (
         is        => 'ro',
         isa       => DualVar->numifies_to(PositiveInt),
         required  => 1,
      );
   }
   
   use Scalar::Util qw( dualvar );
   
   # This is okay.
   #
   my $obj1 = MyClass->new(
      attr => dualvar(2, "-1"),
   );
   
   # This is not okay.
   #
   my $obj2 = MyClass->new(
      attr => dualvar(0, "666"),
   );
   
   # This is not okay.
   #
   my $obj3 = MyClass->new(
      attr => 42,
   );

DESCRIPTION

Types::DualVar is a type library for Moo, Moose, Mouse, or none of the above which offers just one type: DualVar.

DualVar corresponds to the isdual() function from Scalar::Util.

The DualVar type is extended with the stringifies_to and numifies_to methods as documented in Type::Tiny::ConstrainedObject.

BUGS

Please report any bugs to http://rt.cpan.org/Dist/Display.html?Queue=Types-DualVar.

SEE ALSO

Type::Tiny::Manual, Scalar::Util.

AUTHOR

Toby Inkster <tobyink@cpan.org>.

COPYRIGHT AND LICENCE

This software is copyright (c) 2019 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.