giles
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Functional LRU cache via association-list ordered most-recent-first. Get / put both: - find or remove the existing entry - cons the fresh (k, v) to the front - on put, trim the tail when over capacity Sequence: put 1 100; put 2 200; put 3 300 a = get 1 -> 100 (moves 1 to front) put 4 400 (evicts 2) b = get 2 -> -1 (no longer cached) c = get 3 -> 300 d = get 1 -> 100 a + b + c + d = 499 Tests `match … with (k', v) :: rest when k' = k -> …` tuple-cons patterns with `when` guards, `function` keyword for arg-less match, recursive find/remove/take over the same list. Parser limit found: `match n, lst with` ad-hoc tuple-scrutinee is not yet supported (got "expected op -> got op ,"); workaround uses outer `if` plus inner match. 171 baseline programs total.