|  | ANSI Common Lisp  4 Types and Classes  4.4 Dictionary of Types and Classes 
 
 Supertypes:
all types
Description:
The type nil contains no objects and so is also
called the empty type.
The type nil is a subtype of every type.
No object is of type nil.
Notes:
The type containing the object nil is the type null,
not the type nil.
Allegro CL Implementation Details:
 None. |