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bn: Add bn-form->bn.

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This commit is contained in:
Sergiu Ivanov 2020-02-18 12:07:38 +01:00
parent 7a4dd09f40
commit 35abded486
2 changed files with 14 additions and 2 deletions
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6
bn-tests.rkt
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@ -35,4 +35,8 @@
(test-case "Constructing networks from forms" (test-case "Constructing networks from forms"
(let ([s (make-state '((x . #t) (y . #f)))] (let ([s (make-state '((x . #t) (y . #f)))]
[f (update-func-form->update-func '(and x y))]) [f (update-func-form->update-func '(and x y))])
(check-equal? (f s) #f)))))) (check-equal? (f s) #f))
(let ([bn (bn-form->bn (make-hash '((a . (and a b)) (b . (not b)))))]
[s (make-state '((a . #t) (b . #t)))])
(check-equal? ((hash-ref bn 'a) s)
#t))))))

10
bn.rkt
View file

@ -10,7 +10,8 @@
(require "utils.rkt") (require "utils.rkt")
(provide Variable State UpdateFunc Network (provide Variable State UpdateFunc Network
update make-state make-bn update-func-form->update-func) update make-state make-bn update-func-form->update-func
bn-form->bn)
;;; ================= ;;; =================
@ -72,3 +73,10 @@
(define (update-func-form->update-func form) (define (update-func-form->update-func form)
(lambda ([s : State]) (lambda ([s : State])
(cast (eval-with1 (cast s (HashTable Variable Any)) form) Boolean))) (cast (eval-with1 (cast s (HashTable Variable Any)) form) Boolean)))
;;; Build a Network from a Network form.
(: bn-form->bn (-> NetworkForm Network))
(define (bn-form->bn bnf)
(make-hash
(hash-map bnf (lambda ([x : Variable] [form : UpdateFuncForm])
(cons x (update-func-form->update-func form))))))