NAME

       Statistics::R::REXP::Null - the R null object

VERSION

       version 1.0002

SYNOPSIS

           use Statistics::R::REXP;

           my $null = Statistics::R::REXP::Null->new();
           say $rexp->is_null;
           print $rexp->to_pl;

DESCRIPTION

       An object of this class represents the null R object ("NILSXP"). The null object does not
       have a value or attributes, and trying to set them will cause an exception.

METHODS

       "Statistics::R::REXP::Null" inherits from Statistics::R::REXP and adds no methods of its
       own.

   ACCESSORS
       sexptype
           SEXPTYPE of null objects is "NILSXP".

       to_pl
           The Perl value of "NULL" is "undef".

       attributes
           Null objects have no attributes, so the attributes accessor always returns "undef".

BUGS AND LIMITATIONS

       Classes in the "REXP" hierarchy are intended to be immutable. Please do not try to change
       their value or attributes.

       There are no known bugs in this module. Please see Statistics::R::IO for bug reporting.

SUPPORT

       See Statistics::R::IO for support and contact information.

AUTHOR

       Davor Cubranic <cubranic@stat.ubc.ca>

COPYRIGHT AND LICENSE

       This software is Copyright (c) 2017 by University of British Columbia.

       This is free software, licensed under:

         The GNU General Public License, Version 3, June 2007