A big question is what you're using this for. There are a few basic scenarios:

• This is a constant that's overridden in each subclass.

  Solution: use constant NAME => 'vB'; Then, you say $class->NAME or $obj->NAME and you'll get the right one.

• This is a class variable.

  Solution: You need a place for class data and a method of accessing it. The simplest way would be something like:

  {
      my %data = (
          name => 'vB',
      );
  
      sub access_class_data {
          my $class = shift;
          my ($name, $val) = @_;
  
          return $class->SUPER::access_class_data( @_ )
              unless exists $data{ $name };
  
          if ( @_ > 1 ) {
              $data{ $name } = $val;
          }
  
          return $data{ $name };
      }
  }
  [download]

  The only drawback is that you have to cut'n'paste this code in every class. Furthermore, you have to pre-seed the items in the %data hash. But, it may be sufficient and it is really simple.
• You're conflating class data and instance data.

  Solution: Put it in the instance.

My money is on the constant. That's 90% of all class variable usage.

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