167   void increment_refcount();

   167   void increment_refcount();

   168   void decrement_refcount();

   168   void decrement_refcount();

   169   bool is_permanent() {

   169   bool is_permanent() {

   170     return (refcount() == PERM_REFCOUNT);

   170     return (refcount() == PERM_REFCOUNT);

   171   }

   171   }

   172   void make_permanent();

   173   void make_permanent();

   173 

   174 

   174   // Function char_at() returns the Symbol's selected u1 byte as a char type.

   175   // Function char_at() returns the Symbol's selected u1 byte as a char type.

   175   //

   176   //

   176   // Note that all multi-byte chars have the sign bit set on all their bytes.

   177   // Note that all multi-byte chars have the sign bit set on all their bytes.