Brummel
96db54d15d
Iteration-discipline milestone, 1 of 3. Adds named loop + recur as strictly-additive first-class AST nodes: parse/print/prose/serde/ round-trip/schema lockstep, typecheck (binder typing + recur arity/type unification via loop_stack threaded as mut.2's mut_scope_stack; recur-tail-position via verify_loop_body), codegen (loop-header + one phi per binder; recur back-edge br with a NEW parallel block_terminated setter; lambda-boundary loop_frames save/restore). Four Recur* CheckError variants. Strictly additive: zero deletions touch tail-app/tail-do or the seven existing block_terminated sites — this is what makes the destructive it.3 safe. recur synth = fresh metavar (resolves the plan's flagged Type::unit() risk). loop_counter->55, loop_in_lambda->49, four negatives fire, tail-app byte-identical, cargo test --workspace green. Specfda9b78, plan7381a42.
16 lines
500 B
Plaintext
16 lines
500 B
Plaintext
(module loop_nested_in_lambda
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(fn make_adder
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(doc "Iter it.1 — a loop inside a lambda body (lambda-boundary analogue).")
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(type (fn-type (params (con Int)) (ret (fn-type (params (con Int)) (ret (con Int))))))
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(params base)
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(body
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(lam
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(params (typed x (con Int)))
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(ret (con Int))
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(body
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(loop ((var acc (con Int) base) (var k (con Int) 0))
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(if (app == k x)
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acc
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(recur (app + acc 1) (app + k 1)))))))))
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