Brummel
72e54f4fd3
The surface-form file extension changes from .ailx to .ail. AILang's
authoring surface now uses the same .ail stem as its canonical JSON
form (.ail.json), giving the language a single coherent extension
family: .ail is the LLM-authored Form A, .ail.json is the canonical
JSON-AST Form B.
Scope (touched):
- 61 example renames examples/**/*.ailx → .ail (git mv)
- 1 rename experiments/.../rendered/ailx.md → ail.md
- 35 content-edited live-toolchain files (crates/, docs/DESIGN.md,
docs/roadmap.md, docs/PROSE_ROUNDTRIP.md, skills/, bench/reference/*.c,
experiment crates under experiments/.../{render,harness,master})
- Experiment-crate cohort rename Cohort::Ailx → Cohort::Ail,
Form::Ailx → Form::Ail, per_cohort/ailx → per_cohort/ail,
{form-only: ailx} → {form-only: ail}, ```ailx → ```ail
Out of scope (deliberately untouched, to preserve honest history):
- docs/journal-archive.md (content-frozen per CLAUDE.md)
- docs/journals/, docs/specs/, docs/plans/, bench/orchestrator-stats/
- experiments/.../runs/ (frozen LLM-output artefacts; models actually
saw .ailx — renaming would falsify the experimental record)
Verification: cargo build/test --workspace green; experiment crate
cargo test green; bench/check.py + compile_check.py + cross_lang.py
all 0-regressed; negative grep for ailx|Ailx|AILX outside the
out-of-scope paths returns zero matches.
Opens immediate follow-up: roadmap.md P2 todo `ail check`/build/run
accept .ail extension — after this rename, .ail is canonical
authoring surface but the CLI still produces a misleading JSON-parse
error on `ail check foo.ail`. That's the next iter.
60 lines
2.5 KiB
Plaintext
60 lines
2.5 KiB
Plaintext
; Iter 16b.4 — LetRec captures of match-arm pattern bindings.
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; `count_below(p)` takes a `Pair Int Int` (threshold, n), pattern-
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; matches on `(MkPair threshold n)`, and inside that match arm runs
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; a recursive helper `loop` that captures BOTH match-arm bindings
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; (`threshold` and `n`) and counts how many integers in 1..=n are
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; strictly less than `threshold`.
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;
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; The 16b.2/16b.3 desugar passes cannot lift this LetRec — both
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; `threshold` and `n` are bound by a `Pattern::Ctor` Var sub-
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; pattern (`ScopeEntry::MatchArm`). Before 16b.4 this panicked at
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; desugar time. Now the desugar pass leaves the LetRec in place;
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; the post-typecheck `lift_letrecs` pass walks the enclosing match,
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; resolves each pattern binding's type via constructor-field
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; substitution against the matched ctor's declared field types
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; (here: `Pair Int Int`'s ctor `MkPair` has fields `[Int, Int]`,
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; and the scrutinee's `Type::Con.args` are also `[Int, Int]`, so
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; substitution is a no-op and both bindings get type `Int`), and
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; lifts to `loop$lr_0(i: Int, threshold: Int, n: Int) -> Int`.
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;
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; The match has a single ctor and no catch-all; the chain machinery
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; treats the only arm as default-dominating since there's no `_`
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; arm needed for an exhaustive single-ctor ADT (Pair has one ctor).
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;
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; Expected stdout (one per line):
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; count_below(MkPair 10 0) = 0
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; count_below(MkPair 10 5) = 5 (1..=5 all below 10)
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; count_below(MkPair 10 15) = 9 (1..=9 below 10, 10..=15 not)
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(module local_rec_match_capture
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(data Pair (vars a b)
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(ctor MkPair a b))
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(fn count_below
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(doc "Match-arm captures `threshold` and `n`; inner LetRec captures both.")
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(type (fn-type (params (con Pair (con Int) (con Int))) (ret (con Int))))
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(params p)
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(body
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(match p
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(case (pat-ctor MkPair threshold n)
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(let-rec loop
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(params i)
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(type (fn-type (params (con Int)) (ret (con Int))))
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(body
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(if (app > i n)
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0
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(if (app < i threshold)
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(app + 1 (app loop (app + i 1)))
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(app loop (app + i 1)))))
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(in (app loop 1)))))))
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(fn main
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(doc "Drive count_below at MkPair 10 {0,5,15}. Expected: 0, 5, 9.")
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(type (fn-type (params) (ret (con Unit)) (effects IO)))
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(params)
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(body
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(seq (do io/print_int (app count_below (term-ctor Pair MkPair 10 0)))
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(seq (do io/print_int (app count_below (term-ctor Pair MkPair 10 5)))
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(do io/print_int (app count_below (term-ctor Pair MkPair 10 15))))))))
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