I want to have a class where I want to put all of the rand variables with some default value which should be only randomized if they are assigned non-default value from their handle

Example

typedef enum {
  NORTH = 0,
  SOUTH = 1,
  EAST  = 2,
  WEST  = 3,
  DEFAULT_DIR = 4
} direction_t;

class dir_class;
  
  rand direction_t dir;
  
 // I want something like
 // rand direction_t dir = DEFAULT_DIR;

  constraint dir_c
  { 
    if(dir != DEFAULT_DIR) 
    { 
      dir inside {NORTH,SOUTH,WEST,EAST};
    }
  }

endclass: dir_class

Now what I want is when I take handle of this class I might want to assign some non default value (which could be done with inline constraint) but I don’t want to use that because I might end up having 100s of such variable.

So what I need is that initially all of the variables should be having some default enum value like DEFAULT_RAND and only be randomized if they hold this default value otherwise keep the value that is passed via handle