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rose-ash/lib/minikanren/tests/clpfd-distinct.sx
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Merge loops/minikanren into architecture: full miniKanren-on-SX library
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.
2026-05-08 23:01:54 +00:00

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;; lib/minikanren/tests/clpfd-distinct.sx — fd-distinct (alldifferent).
(mk-test
"fd-distinct-empty"
(run* q (fd-distinct (list)))
(list (make-symbol "_.0")))
(mk-test
"fd-distinct-singleton"
(run* q (fd-distinct (list 5)))
(list (make-symbol "_.0")))
(mk-test
"fd-distinct-pair-distinct"
(run* q (fd-distinct (list 1 2)))
(list (make-symbol "_.0")))
(mk-test
"fd-distinct-pair-equal-fails"
(run* q (fd-distinct (list 5 5)))
(list))
(mk-test
"fd-distinct-3-perms-of-3"
(let
((res (run* q (fresh (a b c) (fd-in a (list 1 2 3)) (fd-in b (list 1 2 3)) (fd-in c (list 1 2 3)) (fd-distinct (list a b c)) (fd-label (list a b c)) (== q (list a b c))))))
(= (len res) 6))
true)
(mk-test
"fd-distinct-4-perms-of-4-count"
(let
((res (run* q (fresh (a b c d) (fd-in a (list 1 2 3 4)) (fd-in b (list 1 2 3 4)) (fd-in c (list 1 2 3 4)) (fd-in d (list 1 2 3 4)) (fd-distinct (list a b c d)) (fd-label (list a b c d)) (== q (list a b c d))))))
(= (len res) 24))
true)
(mk-test
"fd-distinct-pigeonhole-fails"
(run*
q
(fresh
(a b c d)
(fd-in a (list 1 2 3))
(fd-in b (list 1 2 3))
(fd-in c (list 1 2 3))
(fd-in d (list 1 2 3))
(fd-distinct (list a b c d))
(fd-label (list a b c d))
(== q (list a b c d))))
(list))
(mk-tests-run!)