Brummel
a4be1e58a3
Iteration-discipline milestone, 2 of 3. Strictly additive (nothing tail-related removed; that is it.3). New whole-body pass verify_structural_recursion sibling of verify_tail_positions (DD-1): smaller-set algorithm with implicit candidate inference + unconstrained accumulators (DD-2, foldl=structural), self/mutual via inline ADT-family union-find (DD-3), it.2-only tail==false grandfather. CheckError::NonStructuralRecursion. term_contains_loop (stops at Term::Lam, DD-4) injects Diverge so existing UndeclaredEffect enforces it, no new variant; lam-arrow + LetRec sub-effect sites wired. DESIGN.md Decision 3 synced. Four it.1 loop fixtures gained !Diverge. Two spec-premise boundary defects surfaced + resolved within the additive invariant (corpus clean, check not weakened), recorded as corrected it.3 corpus-migration scope: (1) the "21 tail-app fixtures" grandfather premise under-counts the corpus — no-ADT-candidate counter recursions have no structural position to verify, deferred to it.3; (2) two RC-regression fixtures joined the spec's transitional tail-app grandfather as the other 20 do (RC==GC guards verified still green). cargo test --workspace 622/0; 9 acceptance pins non-vacuous. Specfda9b78, planbc9f512.
2 lines
988 B
JSON
2 lines
988 B
JSON
{"defs":[{"body":{"args":[{"binders":[{"init":{"lit":{"kind":"int","value":0},"t":"lit"},"name":"acc","type":{"k":"con","name":"Int"}},{"init":{"lit":{"kind":"int","value":1},"t":"lit"},"name":"i","type":{"k":"con","name":"Int"}}],"body":{"cond":{"args":[{"name":"i","t":"var"},{"lit":{"kind":"int","value":10},"t":"lit"}],"fn":{"name":">","t":"var"},"t":"app"},"else":{"args":[{"args":[{"name":"acc","t":"var"},{"name":"i","t":"var"}],"fn":{"name":"+","t":"var"},"t":"app"},{"args":[{"name":"i","t":"var"},{"lit":{"kind":"int","value":1},"t":"lit"}],"fn":{"name":"+","t":"var"},"t":"app"}],"t":"recur"},"t":"if","then":{"name":"acc","t":"var"}},"t":"loop"}],"fn":{"name":"print","t":"var"},"t":"app"},"doc":"Loop-bearing fn that omits !Diverge from its effect row — must fire undeclared-effect.","kind":"fn","name":"main","params":[],"type":{"effects":["IO"],"k":"fn","params":[],"ret":{"k":"con","name":"Unit"}}}],"imports":[],"name":"test_loop_missing_diverge","schema":"ailang/v0"}
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