giles
2d51a8c4ea
Some checks failed
Test, Build, and Deploy / test-build-deploy (push) Failing after 24s
Ground-only type tests via project. Each succeeds iff its argument
walks to the corresponding host value type. Composes with membero for
type-filtered enumeration:
(fresh (x) (membero x (list 1 "a" 2 "b" 3)) (numbero x) (== q x))
-> (1 2 3)
12 new tests, 328/328 cumulative. Caveat: SX keywords are strings, so
(stringo :k) succeeds.
63 lines
1.3 KiB
Plaintext
63 lines
1.3 KiB
Plaintext
;; lib/minikanren/intarith.sx — fast integer arithmetic via project.
|
|
;;
|
|
;; These are ground-only escapes into host arithmetic. They run at native
|
|
;; speed (host ints) but require their arguments to walk to actual numbers
|
|
;; — they are not relational the way `pluso` (Peano) is. Use them when
|
|
;; the puzzle size makes Peano impractical.
|
|
;;
|
|
;; Naming: `-i` suffix marks "integer-only" goals.
|
|
|
|
(define
|
|
pluso-i
|
|
(fn
|
|
(a b c)
|
|
(project
|
|
(a b)
|
|
(if (and (number? a) (number? b)) (== c (+ a b)) fail))))
|
|
|
|
(define
|
|
minuso-i
|
|
(fn
|
|
(a b c)
|
|
(project
|
|
(a b)
|
|
(if (and (number? a) (number? b)) (== c (- a b)) fail))))
|
|
|
|
(define
|
|
*o-i
|
|
(fn
|
|
(a b c)
|
|
(project
|
|
(a b)
|
|
(if (and (number? a) (number? b)) (== c (* a b)) fail))))
|
|
|
|
(define
|
|
lto-i
|
|
(fn
|
|
(a b)
|
|
(project
|
|
(a b)
|
|
(if (and (number? a) (and (number? b) (< a b))) succeed fail))))
|
|
|
|
(define
|
|
lteo-i
|
|
(fn
|
|
(a b)
|
|
(project
|
|
(a b)
|
|
(if (and (number? a) (and (number? b) (<= a b))) succeed fail))))
|
|
|
|
(define
|
|
neqo-i
|
|
(fn
|
|
(a b)
|
|
(project
|
|
(a b)
|
|
(if (and (number? a) (and (number? b) (not (= a b)))) succeed fail))))
|
|
|
|
(define numbero (fn (x) (project (x) (if (number? x) succeed fail))))
|
|
|
|
(define stringo (fn (x) (project (x) (if (string? x) succeed fail))))
|
|
|
|
(define symbolo (fn (x) (project (x) (if (symbol? x) succeed fail))))
|