anchor.diff:    (:method ((a number))
       (zerop a)))
   
  +;; %%% EVENP, ODDP
  +
  +;;; %% Overloading for Monadic Increment Functions
  +
  +;;; 1+, 1-
  +;;; INCF, DECF (?)
  +
  +;;; %% Overloading for Strictly Monadic Transcendental Functions
  +
  +;; %%% SIN, COS, TAN
  +;; %%% ASIN, ACOS
  +
  +
  
positive.code: ;; implementation would present all possible optimizations to the
  ;; compiler
  
  (defgeneric %minusp (a)
    (:method ((a number))
      (minusp a)))
  
negative.code: ;; (@ffloor@ 2.0 2.0d0)
  ;; => 1.0D0, 0.0D0
  
  ;; %% ATAN
  
  ;; %% LOG
  
  ;;; % Overloading for Other Monadic Functions
  
  