use seteq sometimes

main
Matthew Butterick 4 years ago
parent 576b4bee9d
commit bf1c4d1c98

@ -77,7 +77,9 @@
(define/contract (make-var name [vals null])
((name?) ((listof any/c)) . ->* . var?)
(var name (list->set vals)))
(var name (match vals
[(list (or (? fixnum?) (? symbol?)) ...) (list->seteq vals)]
[_ (list->set vals)])))
(define/contract (make-var-names prefix vals [suffix ""])
((string? (listof any/c)) ((string?)) . ->* . (listof name?))
@ -435,8 +437,8 @@
(when-debug (set! nfchecks (+ (length checked-vars) nchecks)))
;; conflict-set will be empty if there are no empty domains (as we would hope)
(define conflict-set (for/list ([cvr (in-list checked-vars)]
#:when (set-empty? (domain cvr)))
(history cvr)))
#:when (set-empty? (domain cvr)))
(history cvr)))
;; for conflict-directed backjumping it's essential to forward-check ALL vars
;; (even after an empty domain is generated) and combine their conflicts
;; so we can discover the *most recent past var* that could be the culprit.

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