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pluso-i / minuso-i / *o-i / lto-i / lteo-i / neqo-i wrap host arithmetic in project. They run at native speed but require their inputs to walk to ground numbers — they are NOT relational the way Peano pluso is. Use them when puzzle size makes Peano impractical (which is most cases beyond toy examples). Composes with relational goals — for instance, (fresh (x) (membero x (1 2 3 4 5)) (lto-i x 3) (== q x)) filters the domain by < 3 and returns (1 2). 18 new tests, 287/287 cumulative.
90 lines
1.6 KiB
Plaintext
90 lines
1.6 KiB
Plaintext
;; lib/minikanren/tests/intarith.sx — ground-only integer arithmetic
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;; goals that escape into host operations via project.
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;; --- pluso-i ---
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(mk-test
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"pluso-i-forward"
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(run* q (pluso-i 7 8 q))
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(list 15))
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(mk-test
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"pluso-i-zero"
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(run* q (pluso-i 0 0 q))
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(list 0))
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(mk-test
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"pluso-i-negatives"
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(run* q (pluso-i -5 3 q))
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(list -2))
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(mk-test
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"pluso-i-non-ground-fails"
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(run* q (fresh (a) (pluso-i a 3 5)))
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(list))
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;; --- minuso-i ---
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(mk-test
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"minuso-i-forward"
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(run* q (minuso-i 10 4 q))
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(list 6))
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(mk-test
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"minuso-i-zero"
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(run* q (minuso-i 5 5 q))
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(list 0))
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;; --- *o-i ---
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(mk-test
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"times-i-forward"
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(run* q (*o-i 6 7 q))
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(list 42))
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(mk-test
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"times-i-by-zero"
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(run* q (*o-i 0 99 q))
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(list 0))
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(mk-test
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"times-i-by-one"
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(run* q (*o-i 1 17 q))
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(list 17))
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;; --- comparisons ---
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(mk-test
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"lto-i-true"
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(run 1 q (lto-i 2 5))
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(list (make-symbol "_.0")))
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(mk-test "lto-i-false" (run* q (lto-i 5 2)) (list))
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(mk-test "lto-i-equal-false" (run* q (lto-i 3 3)) (list))
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(mk-test
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"lteo-i-equal"
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(run 1 q (lteo-i 4 4))
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(list (make-symbol "_.0")))
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(mk-test
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"lteo-i-less"
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(run 1 q (lteo-i 1 4))
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(list (make-symbol "_.0")))
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(mk-test "lteo-i-more" (run* q (lteo-i 9 4)) (list))
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(mk-test
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"neqo-i-different"
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(run 1 q (neqo-i 3 5))
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(list (make-symbol "_.0")))
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(mk-test "neqo-i-same" (run* q (neqo-i 3 3)) (list))
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;; --- composition with relational vars ---
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(mk-test
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"intarith-with-membero"
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(run*
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q
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(fresh
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(x)
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(membero
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x
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(list 1 2 3 4 5))
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(lto-i x 3)
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(== q x)))
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(list 1 2))
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(mk-tests-run!)
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