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boolean-power,boolean-power-stream: Move from networks to utils.

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This commit is contained in:
Sergiu Ivanov 2020-05-28 00:18:38 +02:00
parent 1b65cd7624
commit 90bebbded9
2 changed files with 23 additions and 18 deletions
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17
networks.rkt
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@ -72,8 +72,6 @@
[table->function (-> (listof (*list/c any/c any/c)) procedure?)]
[table->function/list (-> (listof (*list/c any/c any/c)) procedure?)]
[table->network (->* ((listof (*list/c any/c any/c))) (#:headers boolean?) network?)]
[boolean-power (-> number? (listof (listof boolean?)))]
[boolean-power/stream (-> number? (stream/c (listof boolean?)))]
[enumerate-boolean-tables (-> number? (stream/c (listof (*list/c boolean? boolean?))))]
[enumerate-boolean-functions (-> number? (stream/c procedure?))]
[enumerate-boolean-functions/list (-> number? (stream/c procedure?))]
@ -908,21 +906,6 @@
(check-false (f2 (make-state '((x1 . #t) (x2 . #f)))))
(check-true (f2 (make-state '((x1 . #t) (x2 . #t)))))))
;;; Returns the n-th Cartesian power of the Boolean domain: {0,1}^n.
(define (boolean-power n) (apply cartesian-product (make-list n '(#f #t))))
(module+ test
(test-case "boolean-power"
(check-equal? (boolean-power 2) '((#f #f) (#f #t) (#t #f) (#t #t)))))
;;; Like boolean-power, but returns a stream whose elements the
;;; elements of the Cartesian power.
(define (boolean-power/stream n) (apply cartesian-product/stream (make-list n '(#f #t))))
(module+ test
(test-case "boolean-power/stream"
(check-equal? (stream->list (boolean-power/stream 2)) '((#f #f) (#f #t) (#t #f) (#t #t)))))
;;; Returns the stream of the truth tables of all Boolean functions of
;;; a given arity.
;;;

24
utils.rkt
View file

@ -46,7 +46,9 @@
(-> (integer-in 1 4294967087) (stream/c exact-nonnegative-integer?))
(-> exact-integer? (integer-in 1 4294967087)
(stream/c exact-nonnegative-integer?)))]
[cartesian-product/stream (->* () #:rest (listof stream?) stream?)])
[cartesian-product/stream (->* () #:rest (listof stream?) stream?)]
[boolean-power (-> number? (listof (listof boolean?)))]
[boolean-power/stream (-> number? (stream/c (listof boolean?)))])
;; Contracts
(contract-out [variable-mapping? contract?]
[string-variable-mapping? contract?]
@ -674,3 +676,23 @@
(2 4 b)
(2 5 a)
(2 5 b)))))
;;; ==================
;;; Boolean operations
;;; ==================
;;; Returns the n-th Cartesian power of the Boolean domain: {0,1}^n.
(define (boolean-power n) (apply cartesian-product (make-list n '(#f #t))))
(module+ test
(test-case "boolean-power"
(check-equal? (boolean-power 2) '((#f #f) (#f #t) (#t #f) (#t #t)))))
;;; Like boolean-power, but returns a stream whose elements the
;;; elements of the Cartesian power.
(define (boolean-power/stream n) (apply cartesian-product/stream (make-list n '(#f #t))))
(module+ test
(test-case "boolean-power/stream"
(check-equal? (stream->list (boolean-power/stream 2)) '((#f #f) (#f #t) (#t #f) (#t #t)))))