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3 Commits

Author SHA1 Message Date
Brummel 1fb225ee25 bugfix: mono cursor misalignment at poly-free-fn Var with class-constrained Forall
When `synth` visits a `Term::Var v` where v is a polymorphic free fn
whose `Type::Forall` carries class constraints (e.g. `print : forall a.
Show a => ...`, `lt`/`le`/`gt`/`ge : forall a. Ord a => ...`), it
pushes BOTH a class `ResidualConstraint` for each constraint AND a
`FreeFnCall` observation at the same Var site. The mono walkers
(`interleave_slots` collection-side and `rewrite_mono_calls`
rewrite-side) consumed only ONE slot per such Var, leaving the
class-residual cursor misaligned for every subsequent class-method
call in the same body. The next `eq`/`compare` Var in the body then
consumed the leftover `Show T` / `Ord T` slot and was mis-rewritten —
codegen reported `call prelude.show__Bool arg type mismatch: expected
i1, got i64` (or the Int dual).

Fix: new `poly_free_fn_constraint_counts_for_module` registry in
mono.rs (sibling to `poly_free_fn_names_for_module`) maps each
synth-visible poly-free-fn name to its declared constraint count.
Threaded into `collect_residuals_ordered`, `interleave_slots`, and
`rewrite_mono_calls`. Both walkers now advance the cursor by 1 + N
(FreeFn slot + N class-residual fillers) at every poly-free-fn Var.

RED test `print_with_class_method_arg_does_not_misalign_mono_cursor`
(crates/ail/tests/show_print_e2e.rs) + fixture
examples/print_eq_arg_repro.ail pin the bug — body `(app print (app
eq 1 2))` previously crashed at codegen, now prints "false".

Bug surfaced 2026-05-14 during the rpe.1 BLOCKED orchestrator run;
existed in latent form since iter 24.3 (the poly-free-fn-with-class-
constraint synth shape was new there). No schema / codegen / DESIGN.md
changes. cargo test --workspace: 564 / 0 / 3.
2026-05-14 01:38:41 +02:00
Brummel 77b28ad64d iter form-a.1 (Tasks 1-5): additive phase + relocation
First half of the form-a-default-authoring milestone-close iter
(Boss-decided strategy C, big-bang). All five tasks DONE; cargo
test --workspace green at every per-task boundary.

T1 — Add three new tests:
- parse_is_deterministic_over_every_ail_fixture (round_trip.rs)
- cli_parse_then_render_then_parse_is_idempotent (roundtrip_cli.rs)
- carve_out_inventory.rs (new file; #[ignore]'d until T8 deletion)

T2 — Bulk-render the 99 missing examples/<stem>.ail files via
`ail render`. Corpus 58 .ail (pre-iter) -> 157 .ail. Eight .ail.json
carve-outs (7 §C4(a) subject-matter + 1 §C4(b) prelude) preserved.
One re-loop triggered: load_workspace prefers .ail siblings since
ext-cli.1, so the newly-rendered imports broke seven Group-A entries
whose JSON entry-paths now resolved imports to fresh .ail. Repair:
pre-emptive forward-pull of five T3 migrations + 4 transient
#[ignore]s on workspace.rs mod tests (cleanly relocated in T5).

T3 — 14 Group-A test files migrated from ailang_core::load_workspace
to ailang_surface::load_workspace + .ail paths. Carve-out lines
preserved verbatim (7 sites in typeclass_22b2.rs / typeclass_22b3.rs).

T4 — 12 Group-B test files: bulk regex flip on build_and_run /
build_and_run_with_alloc / build_and_run_with_rc_stats call sites
(~70 e2e.rs invocations + 11 subprocess sites). Four files
mis-classified Group-A as Group-B in plan recon (mono_hash_stability,
prelude_free_fns, print_mono_body_shape, show_mono_synthesis); two
files mis-classified Group-B as Group-A (mono_recursive_fn,
mono_xmod_qualified_ref). Migrated per actual shape, not plan label.

T5 — Relocated #[cfg(test)] mod tests from production source to
integration test crates with ailang-surface dev-dependency:
- crates/ailang-core/tests/hash_pin.rs (10 tests from hash.rs)
- crates/ailang-core/tests/workspace_pin.rs (10 non-carve-out tests
  from workspace.rs)
- crates/ailang-codegen/tests/eq_primitives_pin.rs (3 tests from
  codegen/src/lib.rs:3717-3799)
- ailang-prose/tests/snapshot.rs migrated (helper + 8 fixtures) to
  .ail + ailang_surface::load_module
Carve-out tests in workspace.rs mod tests preserved in-place
(3× 22b2 + 3× ct1 = 6 tests). Tempdir-based loader-mechanism tests
(3 sites) also preserved — they don't consume examples/.

Tests: 560 passed, 0 failed, 4 ignored (was 558 + 3 T1 new -
1 transit carve_out_inventory #[ignore] = 560 active).

Tasks 6-12 (bench-driver suffix flips, e2e diff-test rewrite + 4
additional raw-JSON-inspect handlers, .ail.json deletion, retiring
obsolete roundtrip tests + schema_coverage corpus flip, §C3
DESIGN.md restatement, §A4 doctrine edits, WhatsNew + roadmap
strike) ship in the next dispatch on this iter ID.

Known debt inherited to T6-12: 4 raw-JSON-inspect tests in e2e.rs
(borrow_own_demo / reuse_as_demo / render_parse_round_trip_canonical
/ ail_run_accepts_ail_source_with_same_stdout_as_ail_json dual-form
smoke) need rewrite or #[ignore] before T8 deletion; recorded in
journal Concerns + Known debt sections.
2026-05-13 11:12:48 +02:00
Brummel 246b5c7455 iter 24.3: fn print + E2E + 3 compiler-path repairs; milestone 24 close
Ships fn print : forall a. Show a => (a borrow) -> () !IO in the
prelude with explicit-let body \\x -> let s = show x in do
io/print_str s. Three new E2E fixtures + tests verify the full
path:

- show_print_smoke: 4 primitives smoke (print 42 / true / 'hello' /
  3.14) — compile, run, expected stdout
- show_user_adt: data IntBox + instance prelude.Show IntBox +
  print (MkIntBox 7) — stdout '7'
- show_no_instance: let f : Int -> Int = \\x -> x in do print f —
  fires Show-aware NoInstance with DESIGN.md §Prelude(built-in)
  classes cross-reference

IR-shape pin in print_mono_body_shape.rs asserts post-mono
print__Int.body is structurally Term::Let → App(show__Int) →
Do(io/print_str). Protects the explicit let-binder for the heap-Str
RC discipline per eob.1 Str carve-out.

Three plan-defects-fixed-inline surfaced during user-ADT E2E,
necessary repairs to make the spec's stated user-ADT trajectory
work end-to-end:

(a) mono.rs (2 sites): MonoTarget::FreeFn::type_args were carrying
    bare type-cons references; normalised to canonical
    <owner>.<bare> form via workspace_registry.normalize_type_for_lookup
    so synthesised cross-module bodies' post-mono walks reach the
    registry-keyed instance entries. Symmetric to the existing
    class-method-arm normalisation.

(b) codegen/lib.rs (3 sites: resolve_top_level_fn, lower_app
    cross-module arm, synth_with_extras Var arm): post-mono
    synthesised bodies may carry cross-module references to modules
    their source template didn't import (prelude.print__<UserType>
    references show_user_adt.show__<UserType> even though prelude
    does not import user modules). Fall back to direct
    module_user_fns lookup when prefix not in import_map. Both
    ends were independently typechecked before mono ran; the
    cross-module ref is created by mono not by source.

(c) lib.rs synth FreeFnCall arm: walked Type::Forall.constraints,
    substituted rigid vars with fresh metavars, pushed one
    ResidualConstraint per declared constraint. Without this,
    print f at Int -> Int would silently typecheck and fail with
    a confusing 'unknown variable: show' at codegen rather than
    fire the right typecheck-time NoInstance diagnostic.

NoInstance Float-aware arm in check/lib.rs:770-779 extended with
a parallel class == 'prelude.Show' branch that cross-references
DESIGN.md §Prelude(built-in) classes verbatim. Negative-fixture
test asserts code 'no-instance' + Show substring + Prelude-(built-in)-
classes substring.

DESIGN.md §Prelude(built-in) classes milestone-24 paragraph flips
fn print from 'ships in 24.3' to 'shipped in iter 24.3' with body
shape + pin file reference. §Float semantics gains a Show-Float
NaN-spelling cross-reference paragraph linking show 1.5 / show nan /
show inf to instance Show Float via float_to_str.

Roadmap P1 'Post-22 Prelude — Show + print rewire' flipped to [x]
with closing summary naming all three shipped iters (24.1 / 24.2 /
24.3). New P2 entry 'Retire io/print_int|bool|float effect-ops +
migrate example corpus to print' inserted at top of P2.

Tests: 556 passed (was 552 + 4 new). bench/cross_lang exit 0;
bench/compile_check + bench/check exit 1 on documented noise-class
metrics per the audit-cma lineage envelope (8th consecutive
audit-grade observation, baseline pristine per conservative-call).

Milestone 24 closes structurally with this iter. Standard audit
pipeline next.
2026-05-13 04:07:36 +02:00