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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.
26 lines
1012 B
Plaintext
26 lines
1012 B
Plaintext
;; lib/minikanren/project.sx — Phase 5 piece B: `project`.
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;;
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;; (project (x y) g1 g2 ...)
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;; — rebinds each named var to (mk-walk* var s) within the body's
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;; lexical scope, then runs the conjunction of the body goals on
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;; the same substitution. Use to escape into regular SX (arithmetic,
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;; string ops, host predicates) when you need a ground value.
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;;
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;; If any of the projected vars is still unbound at this point, the body
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;; sees the raw `(:var NAME)` term — that is intentional and lets you
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;; mix project with `(== ground? var)` patterns or with conda guards.
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;;
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;; Hygiene: substitution parameter is gensym'd so it doesn't capture user
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;; vars (`s` is a popular relation parameter name).
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(defmacro
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project
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(vars &rest goals)
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(let
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((s-sym (gensym "proj-s-")))
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(quasiquote
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(fn
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((unquote s-sym))
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((let (unquote (map (fn (v) (list v (list (quote mk-walk*) v s-sym))) vars)) (mk-conj (splice-unquote goals)))
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(unquote s-sym))))))
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