giles
5a1dc4392f
Some checks failed
Test, Build, and Deploy / test-build-deploy (push) Failing after 54s
(p X _), (p _ Y) — the two _ are now different variables, matching standard Datalog semantics. Previously both _ symbols were the same SX symbol, so unification across them gave wrong answers. Fix in db.sx: dl-rename-anon-term + dl-rename-anon-lit walk a term or literal and replace each '_' symbol with a fresh _anon<N>. dl-make-anon-renamer returns a counter-based name generator scoped per call. dl-rename-anon-rule applies it to head and body of a rule. dl-add-rule! invokes the renamer before safety check. eval.sx: dl-query renames anon vars in the goal before search and filters '_' out of the projection so user-facing results aren't polluted with internal _anon<N> bindings. The previous "underscore in head ok" test now correctly rejects (p X _) :- q(X) as unsafe (the head's fresh anon var has no body binder). New "underscore in body only" test confirms the safe case. Two regression tests for rule-level and goal-level independence.