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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.
62 lines
1.4 KiB
Plaintext
62 lines
1.4 KiB
Plaintext
;; lib/minikanren/tests/latin.sx — 2x2 Latin square via ino + all-distincto.
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;;
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;; A 2x2 Latin square has 2 distinct fillings:
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;; ((1 2) (2 1)) and ((2 1) (1 2)).
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;; The 3x3 version has 12 fillings but takes minutes under naive search;
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;; full CLP(FD) (Phase 6 proper) would handle it in milliseconds.
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(define
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latin-2x2
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(fn
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(cells)
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(let
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((c11 (nth cells 0))
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(c12 (nth cells 1))
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(c21 (nth cells 2))
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(c22 (nth cells 3))
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(dom (list 1 2)))
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(mk-conj
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(ino c11 dom)
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(ino c12 dom)
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(ino c21 dom)
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(ino c22 dom)
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(all-distincto (list c11 c12))
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(all-distincto (list c21 c22))
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(all-distincto (list c11 c21))
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(all-distincto (list c12 c22)))))) ;; col 2
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(mk-test
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"latin-2x2-count"
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(let
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((squares (run* q (fresh (a b c d) (== q (list a b c d)) (latin-2x2 (list a b c d))))))
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(len squares))
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2)
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(mk-test
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"latin-2x2-as-set"
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(let
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((squares (run* q (fresh (a b c d) (== q (list a b c d)) (latin-2x2 (list a b c d))))))
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(and
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(= (len squares) 2)
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(and
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(some
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(fn (s) (= s (list 1 2 2 1)))
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squares)
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(some
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(fn (s) (= s (list 2 1 1 2)))
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squares))))
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true)
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(mk-test
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"latin-2x2-with-clue"
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(run*
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q
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(fresh
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(a b c d)
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(== a 1)
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(== q (list a b c d))
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(latin-2x2 (list a b c d))))
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(list (list 1 2 2 1)))
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(mk-tests-run!)
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