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(define-module (language python bool)
#:use-module (oop goops)
#:use-module (language python exceptions)
#:use-module (oop pf-objects)
#:export (bool))
(define-syntax-rule (aif it p x y) (let ((it p)) (if it x y)))
(define-method (bool x)
(cond
((null? x)
#f)
((eq? x None)
#f)
(else x)))
(define-method (bool (x <integer>)) (if (= x 0) #f x))
(define-method (bool (x <p>))
(aif it (ref x '__bool__)
(it)
(next-method)))
(define-method (+ (a <boolean>) b)
(+ (if a 1 0) b))
(define-method (+ b (a <boolean>))
(+ (if a 1 0) b))
(define-method (* (a <boolean>) b)
(* (if a 1 0) b))
(define-method (* b (a <boolean>))
(* (if a 1 0) b))
(define-method (- (a <boolean>) b)
(- (if a 1 0) b))
(define-method (- b (a <boolean>))
(- b (if a 1 0)))
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