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

       Davor Cubranic <cubranic@stat.ubc.ca>

       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.

       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

perl v5.34.0                                       2022-02-10                     Statistics::R::REXP::Null(3pm)

       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.

       "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".

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

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

           use Statistics::R::REXP;

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

       version 1.0002