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Squash merge of 76 commits from loops/minikanren. Adds lib/minikanren/ — a complete miniKanren-on-SX implementation built on top of lib/guest/match.sx, validating the lib-guest unify-and-match kit as intended. Modules (20 .sx files, ~1700 LOC): unify, stream, goals, fresh, conde, condu, conda, run, relations, peano, intarith, project, nafc, matche, fd, queens, defrel, clpfd, tabling Phases 1–5 fully done (core miniKanren API, all classic relations, matche, conda, project, nafc). Phase 6 — native CLP(FD): domain primitives, fd-in / fd-eq / fd-neq / fd-lt / fd-lte / fd-plus / fd-times / fd-distinct / fd-label, with constraint reactivation iterating to fixed point. N-queens via FD: 4-queens 2 solutions, 5-queens 10 solutions (vs naive timeout past N=4). Phase 7 — naive ground-arg tabling: table-1 / table-2 / table-3. Fibonacci canary: tab-fib(25) = 75025 in seconds, naive fib(25) times out at 60s. Ackermann via table-3: A(3,3) = 61. 71 test files, 644+ tests passing across the suite. Producer/consumer SLG (cyclic patho, mutual recursion) deferred — research-grade work. The lib-guest validation experiment is conclusive: lib/minikanren/ unify.sx adds ~50 lines of local logic (custom cfg, deep walk*, fresh counter) over lib/guest/match.sx's ~100-line kit. The kit earns its keep ~3× by line count.
261 lines
5.3 KiB
Plaintext
261 lines
5.3 KiB
Plaintext
;; lib/minikanren/tests/goals.sx — Phase 2 tests for stream.sx + goals.sx.
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;;
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;; Streams use a tagged shape internally (`(:s head tail)`) so that mature
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;; cells can have thunk tails — SX has no improper pairs. Test assertions
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;; therefore stream-take into a plain SX list, or check goal effects via
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;; mk-walk on the resulting subst, instead of inspecting raw streams.
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;; --- stream-take base cases (input streams use s-cons / mzero) ---
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(mk-test
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"stream-take-zero-from-mature"
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(stream-take 0 (s-cons (empty-subst) mzero))
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(list))
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(mk-test "stream-take-from-mzero" (stream-take 5 mzero) (list))
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(mk-test
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"stream-take-mature-pair"
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(stream-take 5 (s-cons :a (s-cons :b mzero)))
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(list :a :b))
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(mk-test
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"stream-take-fewer-than-available"
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(stream-take 1 (s-cons :a (s-cons :b mzero)))
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(list :a))
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(mk-test
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"stream-take-all-with-neg-1"
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(stream-take -1 (s-cons :a (s-cons :b (s-cons :c mzero))))
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(list :a :b :c))
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;; --- stream-take forces immature thunks ---
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(mk-test
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"stream-take-forces-thunk"
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(stream-take 5 (fn () (s-cons :x mzero)))
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(list :x))
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(mk-test
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"stream-take-forces-nested-thunks"
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(stream-take 5 (fn () (fn () (s-cons :y mzero))))
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(list :y))
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;; --- mk-mplus interleaves ---
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(mk-test
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"mplus-empty-left"
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(stream-take 5 (mk-mplus mzero (s-cons :r mzero)))
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(list :r))
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(mk-test
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"mplus-empty-right"
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(stream-take 5 (mk-mplus (s-cons :l mzero) mzero))
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(list :l))
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(mk-test
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"mplus-mature-mature"
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(stream-take
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5
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(mk-mplus (s-cons :a (s-cons :b mzero)) (s-cons :c (s-cons :d mzero))))
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(list :a :b :c :d))
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(mk-test
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"mplus-with-paused-left-swaps"
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(stream-take
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5
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(mk-mplus
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(fn () (s-cons :a (s-cons :b mzero)))
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(s-cons :c (s-cons :d mzero))))
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(list :c :d :a :b))
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;; --- mk-bind ---
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(mk-test
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"bind-empty-stream"
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(stream-take 5 (mk-bind mzero (fn (s) (unit s))))
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(list))
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(mk-test
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"bind-singleton-identity"
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(stream-take
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5
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(mk-bind (s-cons 5 mzero) (fn (x) (unit x))))
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(list 5))
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(mk-test
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"bind-flat-multi"
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(stream-take
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10
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(mk-bind
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(s-cons 1 (s-cons 2 mzero))
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(fn (x) (s-cons x (s-cons (* x 10) mzero)))))
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(list 1 10 2 20))
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(mk-test
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"bind-fail-prunes-some"
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(stream-take
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10
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(mk-bind
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(s-cons 1 (s-cons 2 (s-cons 3 mzero)))
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(fn (x) (if (= x 2) mzero (unit x)))))
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(list 1 3))
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;; --- core goals: succeed / fail ---
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(mk-test
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"succeed-yields-singleton"
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(stream-take 5 (succeed empty-s))
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(list empty-s))
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(mk-test "fail-yields-mzero" (stream-take 5 (fail empty-s)) (list))
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;; --- == ---
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(mk-test
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"eq-ground-success"
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(stream-take 5 ((== 1 1) empty-s))
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(list empty-s))
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(mk-test
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"eq-ground-failure"
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(stream-take 5 ((== 1 2) empty-s))
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(list))
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(mk-test
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"eq-binds-var"
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(let
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((x (mk-var "x")))
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(mk-walk
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x
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(first (stream-take 5 ((== x 7) empty-s)))))
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7)
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(mk-test
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"eq-list-success"
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(let
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((x (mk-var "x")))
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(mk-walk
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x
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(first
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(stream-take
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5
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((== x (list 1 2)) empty-s)))))
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(list 1 2))
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(mk-test
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"eq-list-mismatch-fails"
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(stream-take
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5
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((== (list 1 2) (list 1 3)) empty-s))
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(list))
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;; --- conj2 / mk-conj ---
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(mk-test
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"conj2-both-bind"
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(let
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((x (mk-var "x")) (y (mk-var "y")))
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(let
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((s (first (stream-take 5 ((conj2 (== x 1) (== y 2)) empty-s)))))
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(list (mk-walk x s) (mk-walk y s))))
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(list 1 2))
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(mk-test
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"conj2-conflict-empty"
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(let
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((x (mk-var "x")))
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(stream-take
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5
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((conj2 (== x 1) (== x 2)) empty-s)))
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(list))
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(mk-test
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"conj-empty-is-succeed"
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(stream-take 5 ((mk-conj) empty-s))
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(list empty-s))
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(mk-test
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"conj-single-is-goal"
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(let
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((x (mk-var "x")))
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(mk-walk
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x
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(first
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(stream-take 5 ((mk-conj (== x 99)) empty-s)))))
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99)
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(mk-test
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"conj-three-bindings"
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(let
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((x (mk-var "x")) (y (mk-var "y")) (z (mk-var "z")))
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(let
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((s (first (stream-take 5 ((mk-conj (== x 1) (== y 2) (== z 3)) empty-s)))))
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(list (mk-walk x s) (mk-walk y s) (mk-walk z s))))
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(list 1 2 3))
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;; --- disj2 / mk-disj ---
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(mk-test
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"disj2-both-succeed"
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(let
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((q (mk-var "q")))
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(let
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((res (stream-take 5 ((disj2 (== q 1) (== q 2)) empty-s))))
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(map (fn (s) (mk-walk q s)) res)))
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(list 1 2))
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(mk-test
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"disj2-fail-or-succeed"
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(let
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((q (mk-var "q")))
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(let
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((res (stream-take 5 ((disj2 fail (== q 5)) empty-s))))
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(map (fn (s) (mk-walk q s)) res)))
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(list 5))
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(mk-test
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"disj-empty-is-fail"
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(stream-take 5 ((mk-disj) empty-s))
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(list))
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(mk-test
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"disj-three-clauses"
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(let
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((q (mk-var "q")))
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(let
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((res (stream-take 5 ((mk-disj (== q "a") (== q "b") (== q "c")) empty-s))))
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(map (fn (s) (mk-walk q s)) res)))
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(list "a" "b" "c"))
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;; --- conj/disj nesting ---
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(mk-test
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"disj-of-conj"
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(let
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((x (mk-var "x")) (y (mk-var "y")))
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(let
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((res (stream-take 5 ((mk-disj (mk-conj (== x 1) (== y 2)) (mk-conj (== x 3) (== y 4))) empty-s))))
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(map (fn (s) (list (mk-walk x s) (mk-walk y s))) res)))
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(list (list 1 2) (list 3 4)))
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;; --- ==-check ---
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(mk-test
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"eq-check-no-occurs-fails"
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(let
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((x (mk-var "x")))
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(stream-take 5 ((==-check x (list 1 x)) empty-s)))
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(list))
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(mk-test
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"eq-check-no-occurs-non-occurring-succeeds"
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(let
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((x (mk-var "x")))
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(mk-walk
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x
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(first (stream-take 5 ((==-check x 5) empty-s)))))
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5)
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(mk-tests-run!)
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