Brummel
6fdb45d2f2
Single iter shipping the post-milestone-24 follow-up named in
docs/specs/2026-05-14-retire-per-type-print-effects.md. After this
iter the only surviving direct-output effect-op is `io/print_str`;
all per-type print primitives are replaced by the polymorphic
`print` helper (prelude, iter 24.3).
Components:
- 92 examples/*.ail fixtures migrated (do io/print_<T> x) →
(app print x); 6 .prose.txt snapshots regenerated via `ail prose`.
- Four-site lockstep compiler deletion: crates/ailang-check/src/builtins.rs
(3 effect_ops.insert blocks + 3 list() rows + the
install_io_print_float_signature test + module + EffectOpSig
doc-comments); crates/ailang-codegen/src/lib.rs lower_app
(3 arms + lowers_io_print_float test); crates/ailang-codegen/src/synth.rs
builtin_effect_op_ret match-arm pattern. Dead `intern_string`
helper removed as a follow-up.
- Five incidental test-body migrations (ailang-check x2, ailang-core
spec_drift + design_schema_drift, ailang-surface/src/lex.rs,
ailang-prose/src/lib.rs round-trip test).
- Cat B test-harness patch: six IR-shape tests in
crates/ail/tests/e2e.rs gained a monomorphise_workspace call
before lower_workspace_with_alloc so they follow the same
pipeline as `ail build` (the home-rolled desugar+lift loop
stayed because mono's precondition is "already lifted"; mono
inserts after lift).
- Six doc-comment touch-ups (lex.rs module doc, parse.rs
diagnostic example, ail/src/main.rs x2, runtime/str.c %g anchor,
crates/ailang-core/specs/form_a.md surface-spec example).
- DESIGN.md seven-site sweep (Decision 11 example, Polymorphic
print past-tense, Heap-Str output sentence, effect-op
invocation comment, Float NaN paragraph re-anchored on
float_to_str, two "What is supported" lists).
- Three E2E test-comment polish + four IR-snapshot refresh + one
canonical-hash pin update (plan-unanticipated downstream
consequences of the corpus migration).
- bench/{check,compile_check,cross_lang}.py: all exit 0; no
ratification needed.
- Roadmap entry struck through; per-iter journal at
docs/journals/2026-05-14-iter-rpe.1.md.
Tests 564/0/3. cargo clippy and cargo doc: zero warnings.
Two upstream codegen bugs surfaced during the first BLOCKED
attempt and were fixed in separate iters before this retry:
- 1fb225e bugfix: mono cursor misalignment at poly-free-fn Var
with class-constrained Forall.
- feb9413 bugfix: print leak — propagate ret_mode through rigid
substitution + prelude Show.show ret_mode.
Known debt (carried forward for next /audit):
- Emitter.strings field is functionally dead post-iter (orphan
after intern_string removal); cycles over empty map harmlessly.
55 lines
2.1 KiB
Plaintext
55 lines
2.1 KiB
Plaintext
; Iter 16c — lit patterns at top level and inside Ctor sub-patterns.
|
|
; `classify` matches an Int against three lit arms (0, 1, default).
|
|
; `categorize_first` matches a List<Int>: empty -> -1, head==0 -> 0,
|
|
; otherwise the head value. The latter exercises Pat-Lit nested
|
|
; inside Pat-Ctor's first field. Both shapes are now handled by the
|
|
; 16c desugar pass; codegen sees only If/Match-on-Ctor combinations.
|
|
;
|
|
; Iter 16d update — the chain machinery's terminator is now the
|
|
; polymorphic `__unreachable__` builtin (`forall a. a`, lowered to
|
|
; LLVM `unreachable`) instead of a `Unit` literal. That removed the
|
|
; pre-16d need for a trailing `(case _ 0)` arm in `categorize_first`
|
|
; whose only purpose was to dominate the synthetic `Unit`-typed
|
|
; terminator. The two ctor arms (`Nil` and `Cons h _`) are
|
|
; exhaustive on `IntList`; the chain default is never reached.
|
|
;
|
|
; Expected stdout (one per line): 100, 200, 999, -1, 0, 7.
|
|
|
|
(module lit_pat
|
|
|
|
(data IntList
|
|
(ctor Nil)
|
|
(ctor Cons (con Int) (con IntList)))
|
|
|
|
(fn classify
|
|
(doc "Map 0->100, 1->200, anything else->999.")
|
|
(type (fn-type (params (con Int)) (ret (con Int))))
|
|
(params n)
|
|
(body
|
|
(match n
|
|
(case (pat-lit 0) 100)
|
|
(case (pat-lit 1) 200)
|
|
(case _ 999))))
|
|
|
|
(fn categorize_first
|
|
(doc "Empty -> -1; first element 0 -> 0; otherwise return the head.")
|
|
(type (fn-type (params (con IntList)) (ret (con Int))))
|
|
(params xs)
|
|
(body
|
|
(match xs
|
|
(case (pat-ctor Nil) -1)
|
|
(case (pat-ctor Cons (pat-lit 0) _) 0)
|
|
(case (pat-ctor Cons h _) h))))
|
|
|
|
(fn main
|
|
(doc "Drive both fns. Expected (per line): 100, 200, 999, -1, 0, 7.")
|
|
(type (fn-type (params) (ret (con Unit)) (effects IO)))
|
|
(params)
|
|
(body
|
|
(seq (app print (app classify 0))
|
|
(seq (app print (app classify 1))
|
|
(seq (app print (app classify 17))
|
|
(seq (app print (app categorize_first (term-ctor IntList Nil)))
|
|
(seq (app print (app categorize_first (term-ctor IntList Cons 0 (term-ctor IntList Nil))))
|
|
(app print (app categorize_first (term-ctor IntList Cons 7 (term-ctor IntList Nil))))))))))))
|