Created
September 15, 2015 21:19
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| (define-syntax (relation->set stx) | |
| (syntax-case stx () | |
| [(_ rel-name rel-size) | |
| (with-syntax ([rel-vars (for/list ([x (in-range (syntax->datum #'rel-size))]) | |
| (gensym 'X))]) | |
| #`(datalog *db* (? (#,(syntax->datum #'rel-name) | |
| #,@#'rel-vars))))])) |
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make-variable: contract violation
expected: (or/c #f (list/c any/c (or/c exact-positive-integer? #f) (or/c exact-nonnegative-integer? #f) (or/c exact-nonnegative-integer? #f) (or/c exact-positive-integer? #f)))
given: '(#f #f #f #f 0)
in: the 1st argument of
(->
(or/c
#f
(list/c
any/c
(or/c exact-positive-integer? #f)
(or/c exact-nonnegative-integer? #f)
(or/c exact-nonnegative-integer? #f)
(or/c exact-positive-integer? #f)))
symbol?
variable?)
contract from: /datalog/ast.rkt