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.
65 lines
2.1 KiB
Plaintext
65 lines
2.1 KiB
Plaintext
; Iter 18d.1 — `(reuse-as xs (term-ctor List Cons ...))` schema floor
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; demo. The `(reuse-as ...)` wrapper is identity at codegen in 18d.1
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; (the `body` is lowered, the `source` is dropped); 18d.2 will lower
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; this as in-place rewrite under `--alloc=rc`.
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;
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; The fixture exercises:
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; - parser + printer round-trip for `Term::ReuseAs`
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; - typecheck of an all-explicit-mode fn whose body returns a
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; `(reuse-as <var> <ctor>)` form (body is allocating: Term::Ctor)
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; - linearity check: `xs` is consumed exactly once via reuse-as in
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; the Cons arm; the Nil arm doesn't consume `xs`. Merge across
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; arms is consistent.
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; - codegen identity under --alloc=gc: program prints `9`
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; (1+1 + 2+1 + 3+1 = 9), the same value the non-reuse-as
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; `map_inc` would print.
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;
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; Expected stdout under --alloc=gc:
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; 9
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(module reuse_as_demo
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(data List
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(doc "Monomorphic singly-linked Int list — boxed, recursive.")
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(ctor Nil)
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(ctor Cons (con Int) (con List)))
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(fn map_inc
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(doc "Increment each Int in xs. The Cons arm uses (reuse-as xs ...) — author asserts that the freshly-allocated Cons cell should reuse xs's slot. In 18d.1 codegen treats this as identity.")
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(type
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(fn-type
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(params (own (con List)))
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(ret (own (con List)))))
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(params xs)
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(body
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(match xs
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(case (pat-ctor Nil) (term-ctor List Nil))
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(case (pat-ctor Cons h t)
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(reuse-as xs
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(term-ctor List Cons (app + h 1) (app map_inc t)))))))
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(fn sum_list
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(doc "Consume xs, sum its elements.")
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(type
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(fn-type
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(params (own (con List)))
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(ret (con Int))))
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(params xs)
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(body
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(match xs
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(case (pat-ctor Nil) 0)
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(case (pat-ctor Cons h t)
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(app + h (app sum_list t))))))
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(fn main
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(doc "Build [1,2,3]; map_inc → [2,3,4]; sum_list → 9. Print 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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(let xs
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(term-ctor List Cons 1
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(term-ctor List Cons 2
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(term-ctor List Cons 3
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(term-ctor List Nil))))
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(app print (app sum_list (app map_inc xs)))))))
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