832375f2ac54344f4c83e6d79600997f16c28ab1
89 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
 Brummel
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832375f2ac |
convention: counter-prefix file naming across docs/specs/, docs/plans/, design/contracts/, design/models/
All 176 files in the four accumulating directories now use a zero-padded 4-digit counter prefix that reflects creation order (`NNNN-slug.md`). The counter is assigned per directory in strict git-log creation order; ties broken alphabetically by original name. The old `YYYY-MM-DD-` prefix on docs/specs/ and docs/plans/ files is dropped — the date is recoverable from git log and the counter carries the ordering. A file's counter is stable for the life of the file: never reassigned, never reused, never compacted. Deleted files retire their counter; subsequent files do not fill the gap. This is the property that lets cross-references stay literal — refs use the full filename including the counter (`design/contracts/0007-honesty-rule.md`) so they grep cleanly and resolve directly without a glob step. 313 cross-references updated across .md/.rs/.toml/.c/.json files (test pins, include_str! paths, design-INDEX entries, baseline notes, runtime C comments, inter-contract markdown links incl. bare basename and `../models/foo.md` forms). CLAUDE.md gets a new "File-naming convention" section spelling out the rule and rationale. skills/brainstorm/SKILL.md and skills/planner/SKILL.md updated so new spec/plan creation produces counter-prefixed names from the start. The full test suite (cargo test --workspace) passes. |
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Brummel
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26fb3459d8 |
GREEN: io/print_str byte-faithful via @fputs(@stdout) — closes #29
The runtime print path now writes exactly the bytes of its
argument with no implicit trailing newline. `io/print_str` is
byte-faithful; authors who want a newline emit `(do io/print_str
"\n")` themselves.
## Codegen
`crates/ailang-codegen/src/lib.rs`:
- Module preamble: `@puts(ptr)` → `@fputs(ptr, ptr)` plus
`@stdout = external global ptr` (libc's `FILE *stdout`).
- Effect-op lowering for `io/print_str`: emit
`getelementptr +8` then `load ptr, ptr @stdout` then
`call/tail call i32 @fputs(ptr bytes, ptr fp)`. Identical
bytes-pointer GEP, distinct sink.
- The pinned IR-shape test renames from
`print_str_calls_puts_with_bytes_pointer` to
`print_str_calls_fputs_with_bytes_pointer_and_stdout` and now
asserts: bytes-GEP present, stdout-load present, both module-
preamble declarations present, and no `@puts(` call anywhere
in the emitted IR.
## Why this shape, and not the alternatives
- *Rename `io/print_str` to `io/println_str` (issue #29 option 2)*
— kept the auto-newline, just relabelled it. AILang's design
bias is explicit-over-implicit (CLAUDE.md: implicit conversions
cut). Auto-newline is a hidden runtime augmentation; the rename
would have preserved it. Rejected.
- *Append `\n` inside the polymorphic `print` (Show-mediated)
function in `examples/prelude.ail`* — would have been a one-line
fix. Rejected: `print` is the Show-mediated formatter, not a
newline emitter; baking a newline into it would have re-imposed
the same implicit-augmentation problem one layer up, breaking
callers that legitimately want pure-bytes output.
## Fixture / test sweep
30 `.ail` fixtures whose owning tests asserted line-separated
stdout now emit explicit `(do io/print_str "\n")` after each
print. Tests that asserted on multi-line stdout (`show_print_e2e`,
`floats_e2e`, `str_concat_e2e`, `eq_ord_e2e`, several `print_*`
smoke tests) had their fixtures sweetened the same way; assertions
themselves remain the canonical observable output. Fixtures that
never relied on the newline (no test ever read the absence of one)
were left untouched.
## Migrated metadata
- `crates/ailang-core/tests/hash_pin.rs`: the `ordering_match::main`
canonical hash is refreshed (`b65a7f834703ffb4` →
`8ed47b4062ce00f5`). The comment now names both successive
corpus migrations honestly: the per-type-print-retirement (which
moved `(do io/print_int x)` to `(app print x)`) AND this
fputs swap (which wrapped that with `(seq ... (do io/print_str
"\n"))`).
- `design/contracts/str-abi.md`: the consumer-ABI table now lists
`@fputs` as the print sink. A prose paragraph documents the
byte-faithful semantics and references this issue.
- `examples/ordering_match.prose.txt`: regenerated from the
updated `ordering_match.ail`.
- `crates/ail/tests/snapshots/{hello,sum,max3,list,ws_main}.ll`:
IR snapshots regenerated via `UPDATE_SNAPSHOTS=1`.
- Stale `@puts` comments in `runtime/str.c`,
`crates/ail/tests/{e2e,show_print_e2e,print_no_leak_pin}.rs`
replaced with `@fputs`.
## Verification
- `cargo test -p ail --test print_str_no_auto_newline_e2e` — both
RED tests from commit
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Brummel
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5170b6abd1 |
iter operator-routing-eq-ord.1 (DONE 13/13): drop comparator builtins, route through Eq/Ord
Closes Gitea #1. Realises the "P2 follow-up" called out in examples/prelude.ail:9 — removes the surface comparator names `==` / `!=` / `<` / `<=` / `>` / `>=` from the language entirely, routes the LLM-author's `(app eq …)` / `(app compare …)` / `(app ne|lt|le|gt|ge …)` through prelude.Eq / prelude.Ord class- dispatch, ships six named Float-comparison fns (`float_eq`/`float_ne`/`float_lt`/`float_le`/`float_gt`/`float_ge`) so Float keeps comparability without an Eq/Ord instance, and emits primitive instance bodies with `alwaysinline` so the -O0 IR shape stays at one instruction per comparison. Plan-task journal (13 tasks, single atomic iter per Approach A): Task 1 — Bootstrap: 4 new fixtures (eq_user_adt_smoke.ail, eq_float_must_fail.ail, float_compare_smoke.ail, operator_unbound_check.ail) + 5 new E2E/pin tests as RED starting state. All 5 confirmed RED at start: north-star fixed `NoInstance Eq Unit` (preserved by Unit-eq opening line intentionally added in plan-self-review); float_compare unknown `float_eq`; operator-name typechecked (== still polymorphic); must-fail diagnostic lacked `float_eq`; alwaysinline absent from IR. Task 2 — Codegen alwaysinline + intercept arms: introduced `intercept_emit_wants_alwaysinline` allowlist + appended ` alwaysinline` between `)` and `{` of the `define` line in `emit_fn`; added 9 new intercept arms to `try_emit_primitive_instance_body` — `eq__Int`/`eq__Bool`/ `eq__Unit` + the six `float_*` arms. Task 3 — Prelude reshape: `instance Eq Unit` added; Eq Int/Bool bodies become placeholder-`false` (intercept overrides); six `float_*` free fns added; line-9 P2-follow-up comment removed. Lockstep hash re-pins: prelude_module_hash_pin (3abe0d3fa3c11c99 → new), mono_hash_stability six body-hash literals (eq__Int/Bool/Str + compare__Int/Bool/Str all shifted because placeholder body changes the canonical hash). IR-snapshot regen (hello/list/max3/sum/ws_main) rolled forward into this task at orchestrator's pragmatic call — prelude shift forces the snapshots immediately. Task 4 — Fixture migration: 58 .ail fixtures rewritten (`(app == …)` → `(app eq …)`, etc.; Float-typed operand sites to `(app float_eq …)` / `(app float_lt …)`). eq_ord_user_adt.ail:21 inner `==` → `eq` migration with lockstep eq_ord_e2e.rs:134 body-hash re-pin (3c4cf040cb4e8bb2 → new). Two prose snapshots accepted; deps test + 5 hash_pin literals updated as cascading consequences. Task 5 — Test-scaffold migration: all 8 in-source `#[cfg(test)] mod tests` AST-literal sites threaded (desugar.rs:2414, check/lib.rs:5656/6092/6220, codegen/lib.rs sites). 7 obsolete in-source tests deleted (5 eq_typechecks + 2 lower_eq ADT/Fn rejection — coverage moves to E2E eq_user_adt_smoke + eq_float_must_fail). 2 additional letrec tests deleted (single-module check env can't resolve eq/ge without prelude auto-import; covered by workspace E2E). Task 6 — Lit-pattern desugar: build_eq emits `Term::Var { name: "eq" }` instead of `"=="` at desugar.rs:1109; doc-comment rewritten to describe class-dispatch. Task 7 — Dead-machinery deletion sweep (compile-gated): typchecker builtins (install + list comparator entries deleted); codegen builtin_binop_typed (10 comparator arms deleted from synth.rs, table reduced to arithmetic core); lower_eq fn entirely deleted; `==` short-circuit in lower_app deleted; `is_static_callee` `==` clause deleted; `is_arithmetic_or_comparison_op` renamed to `is_arithmetic_op` + caller-update at codegen/lib.rs:2152 + :2529. Dead `poly_a_a_to_bool` helpers also removed. Workspace build green after compile gate — every caller of the deleted surface was migrated by Tasks 4-6. Task 8 — Float-aware NoInstance diagnostic: check/lib.rs:856-880 addendum extended to name `float_eq` / `float_lt` as the explicit alternative for Eq/Ord at Float; eq_float_noinstance.rs:32-44 assertion extended. Task 9 — IR snapshot regen: subsumed by Task 3 (prelude shift forced immediate snapshot regen; deferring to Task 9 would have left the workspace red between tasks). Task 10 — Prose-projection cleanup: 6 comparator arms deleted from binop_info; 3 in-source mod-tests updated/deleted (comparator-infix rendering would be dishonest now that the operators are no longer language identifiers). Task 11 — Contract updates: 5 design files rewritten to the class-dispatch present — float-semantics.md (arithmetic guarantees retained on +/-/*/; comparison guarantees transferred from ==/!=/< to float_eq/float_ne/float_lt/etc.); prelude-classes.md (Eq Unit added to instance list; new paragraph on six float_* fns; Float-no-Eq/Ord clause gains `→ use float_eq` cross-reference); str-abi.md (clause "REMAIN primitive operators" rewritten to describe class-method dispatch); scope-boundaries.md (multiple operator-name and Pattern::Lit-desugar clauses rewritten); authoring-surface.md (==, <= dropped from operator-example list). Task 12 — Initial acceptance gate: workspace 638/0 GREEN; bench/compile_check + cross_lang 0 regressed; bench/check.py flagged 4 regressions on bench_closure_chain (+29% bump_s, +47% rc_s, +29% bump_rss_kb, +48% rc_rss_kb). Orchestrator initially classified as DONE-with-concerns; Boss reclassified as PARTIAL-via-acceptance-#8-fail after independent re-run, extended iter scope to Task 13. Task 13 — Direct icmp intercept arms (Boss-extension): try_emit_primitive_instance_body gains direct-icmp arms for lt__Int / le__Int / gt__Int / ge__Int / ne__Int, bypassing the compare__Int → Ordering → match indirection that allocated one Ordering ctor per call in tight loops. Each new arm inherits `alwaysinline` via the existing allowlist (extended accordingly). New IR pin test `ord_int_intercept_ir_pin.rs` + smoke fixture `ord_int_intercept_smoke.ail` ratify the optimization — opt -O2 -S confirms zero `call @ail_prelude_lt__Int` in optimized IR; the icmp folds directly at every use site. Bool variants (lt__Bool/etc.) deliberately NOT added — no bench/example calls Ord at Bool; spec-extension permits skipping if unreachable at bench level. Family can be extended symmetrically when first Bool-ordered perf workload appears. Bench-gate post-Task-13: bench_closure_chain bump_s -6.05%, rc_s -2.67%, bump_rss_kb -0.77%, rc_rss_kb +0.46% — all four previously-regressed metrics back inside tolerance. Full bench corpus: 36 metrics, 0 regressed, 0 improved beyond tolerance, 36 stable. bench/check.py exit 0 ✓; bench/compile_check.py exit 0 ✓; bench/cross_lang.py exit 0 ✓. Workspace: 640 passed, 0 failed across all binaries (delta vs. milestone start: +5 new E2E/pin tests added in Task 1 + 1 IR pin added in Task 13 − 9 in-source mod tests deleted as obsolete net ≈ −3). The eq_user_adt_smoke fixture's Unit-opening line was the deliberate RED-first device added in planner self-review so the north-star wouldn't accidentally GREEN at start (user-ADT-Eq on Point with hand-written instance was already operable today; the milestone's actual delivery is operator-name death + Eq Unit + Float-named-fns + cleanup of the two-pathy primitive comparator machinery). Net delta: 96 files changed, 1760 insertions, 1101 deletions; 12 net-new files (6 new fixtures, 5 new E2E/pin tests, 1 stats file). main passes-test-count: 640 (was 633 pre-iter, accounting for the deletions). Spec-vs-acceptance addendum: spec §Testing strategy anticipated the bench-gate-regression case with two recovery paths (`alwaysinline` investigation or "spec needs revisiting toward α"). Task 13 is the third path — direct intercept arms for `lt`/etc. that bypass the compare→match path entirely. The spec's contingency clause was thus generous enough to absorb Task 13 without spec revision, but a future iter that hits a class-method primitive where the body shape introduces a similar codegen cost (Ordering allocation, RC tax, deferred-init) should expect a parallel extension. The pattern is "primitive instance whose canonical body indirects through other class methods that allocate" → add a direct-emit intercept arm + alwaysinline + IR-shape pin. Concerns absorbed: - Codegen lower_app / resolve_top_level_fn gained a prelude-fallback lookup so bare monomorphic prelude fns (`float_eq` etc.) resolve from non-prelude modules without explicit `prelude.float_eq` qualifier. Mirrors the typechecker's implicit prelude import — not in plan but necessary infra for the named-fn surface to be callable. - Recon's "≈10 fixtures" estimate was 6× too low — 58 actual. Mechanical migration; no design impact. - Recon caught 4 in-source AST-literal sites the spec missed (lib.rs:5656 `>=` site + three codegen/lib.rs sites); Task 5 covered all. - Recon caught 2 contract files outside the spec's update set that directly contradicted the milestone (str-abi.md + scope-boundaries.md "REMAIN primitive operators" / "Pattern::Lit desugar to ==" clauses); Task 11 covered all 5. Stats file: `bench/orchestrator-stats/2026-05-21-iter-operator-routing-eq-ord.1.json`. closes #1 |
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Brummel
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14a91f0ae5 |
iter boehm-retirement.1 (DONE 10/10): retire the transitional Boehm GC backend
Closes Gitea #4. Removes the Boehm-Demers-Weiser conservative GC backend wholesale across six layers in one atomic iteration. After this iter, `AllocStrategy` has two variants (`Rc`, `Bump`), `--alloc=gc` is rejected at CLI parse with `unknown --alloc value`, the libgc link arm is gone, and the design ledger describes RC (canonical) + bump (raw-alloc bench-floor) as the only allocators. Layer-by-layer summary: CLI surface — `crates/ail/src/main.rs`: `parse_alloc_strategy` arm `"gc" => Ok(AllocStrategy::Gc)` removed; error wording updated to `(expected `rc` or `bump`)`; clap-derive `value_parser = ["gc","bump","rc"]` allowlist on BOTH `Build` and `Run` subcommands DROPPED so that `parse_alloc_strategy` remains the sole gatekeeper for the unknown-value diagnostic (otherwise clap shadows the runtime diagnostic with `invalid value 'gc' for '--alloc'`, which would miss the milestone-pin's stderr substring check). The `default_value = "rc"` stays. Codegen — `crates/ailang-codegen/src/lib.rs`: `AllocStrategy::Gc` variant + `Default` derive removed (no caller of `AllocStrategy::default()` existed in the workspace, so the trait derivation was dead). `fn_name` (spec called it `runtime_alloc_fn` loosely; actual identifier is `fn_name`) drops the `Gc => "GC_malloc"` arm. `lower_workspace` and `lower_workspace_staticlib` defaults flip from `Gc` to `Rc`. In-source negative-complement codegen test (mod tests, lib.rs:3571ff) retargets from `AllocStrategy::Gc` to `AllocStrategy::Bump` (bump also doesn't emit per-type drop fns; the test's semantic "no drop fns under non-RC" is preserved). Link branch — `crates/ail/src/main.rs:2389ff`: The `match strategy { AllocStrategy::Gc => { ... cmd.arg("-lgc"); ... } }` arm and its libgc-link block are entirely gone. The surviving match exhausts on `Bump` and `Rc` (Rust's exhaustiveness check confirms; no `error[E0004]`). Staticlib-guard diagnostic rewritten to drop the "shared Boehm collector" phrasing while preserving the prefix `staticlib (swarm) artefact is RC-only` verbatim (the surviving `staticlib_bump_is_rejected` test depends on that substring). Test suite — 3 pure-differential e2e tests deleted (`gc_handles_recursive_list_construction`, `alloc_rc_produces_same_stdout_as_gc`, `alloc_rc_matches_gc_on_std_list_demo`); 9 RC-feature tests stripped of their `stdout_gc` build call and differential `assert_eq!(stdout_gc, stdout_rc, ...)` (absolute `assert_eq!(stdout_rc.trim(), "<n>")` pin retained as correctness oracle); `staticlib_gc_is_rejected` deleted; new milestone-pin `crates/ail/tests/boehm_retirement_pin.rs` asserts `ail build --alloc=gc` exits ≠ 0 with stderr containing `unknown --alloc value` and `\`gc\``; `examples/gc_stress.ail` fixture deleted (no remaining references). Implementer expansion (not in plan): `iter17a_local_box_alloca` (in `e2e.rs`) carried an IR-shape assertion against `@GC_malloc`-absence as the witness for non-escaping allocation. After the Task-2 codegen default flip, the witness shifts to `@ailang_rc_alloc`-absence in escape-targeted positions; assertion + doc-comment updated. Property protected ("no heap allocation in non-escaping contexts") is unchanged; only the named allocator shifts. Bench harness — `bench/run.sh` 9→6 column compaction (workload + bump(s) + rc(s) + rc/bump + bump RSS + rc RSS); gc-arm `bench_latency_implicit_gc` build call + harness invocation dropped from latency block; header comment reframed from "GC-overhead bench harness" to "RC-overhead bench harness"; "Decision 10's Boehm-retirement target (1.3x)" rewording to "RC-overhead-vs-bump bench-health regression gate". `bench/check.py:62` header-sentinel changes from `"gc(s)" in line` to `"bump(s)" in line`; column-count check at `:72` flips from `!= 9` to `!= 6`; per-workload field set drops `gc_s`/`gc_over_bump`/`gc_rss_kb`; `ARM_LABEL_TO_KEY` drops the `"implicit @ gc": "implicit_at_gc"` entry. `bench/baseline.json` regenerated via `--update-baseline`. Implementer note (planner-defect): `write_new_baseline` iterated over the *existing* baseline's metric list when emitting the regenerated file, so even after parser-level `gc_*` removal, the fallback emitted them back into the JSON. Scrubbed post-update; the cleaner fix (have `write_new_baseline` emit only keys present in `parsed_throughput[workload]`) is a follow-up if the script becomes load-bearing for further allocator changes. Design ledger — `design/models/rc-uniqueness.md` excises the `## Dual allocator — RC canonical, Boehm parity oracle` section and the `Boehm-Demers-Weiser conservative GC` choice block + rationale + trade-offs; the per-fn-alloca section generalises Boehm-specific language to allocator-agnostic; the memory-model section's `## Choice.` paragraph reframes the 1.3× target from "Boehm-retirement gate" to "bench-health regression gate". `design/models/pipeline.md` drops the `--alloc=gc → links libgc` arm of the pipeline diagram and replaces it with `--alloc=bump → links bump-floor`; the accompanying prose rewrites accordingly. `design/contracts/scope-boundaries.md` rewrites the "Memory management via Boehm conservative GC" bullet to describe RC + per-fn-arena present-tense; the dead reference to `examples/gc_stress.ail.json` (file never existed; the fixture only ever had a `.ail` form, deleted by this iter) is dropped along with the `examples/std_list_stress.ail.json` reference whose purpose was Boehm-only soak testing. `:67`'s `@printf` / `@GC_malloc` parenthetical updated. `design/contracts/memory-model.md:232` drops the "leaks like the pre-Boehm era" phrase; the RC inc/dec instrumentation is wired up, so the "until then" conditional that referenced pre-Boehm is closed. `design/contracts/embedding-abi.md:42-44` rewrites the staticlib-guard prose to drop the `--alloc=gc` clause (gc is now a CLI-parser-level unknown-value, not a staticlib-guard rejection) and reframe the swarm-safety justification around `--alloc=bump` (leak-only bench instrument) rather than the historical Boehm collector. Honesty pin — `crates/ailang-core/tests/docs_honesty_pin.rs` inverts the polarity: the present-tense Boehm-anchor assertion on `pipeline.md` (`:116-117`) is deleted, and four absence-pins are added to `design_md_has_no_wunschdenken` against the Boehm-zombie strings `transitional Boehm`, `parity oracle`, `GC_malloc`, `libgc`. The `design_corpus()` already includes `rc-uniqueness.md` so no path-list change was needed for the new pins to scan. `crates/ailang-core/tests/design_index_pin.rs:166` drops the `"pre-Boehm"` token from the protected-exception comment list (the phrase no longer appears in `memory-model.md` after this iter, so the exception is dead). Runtime docs — `runtime/bump.c`, `runtime/rc.c`, `runtime/str.c` header comments scrubbed of Boehm/`GC_malloc`/`libgc` references. `bump.c`'s function signature description still documents `void *bump_malloc(size_t)` as the bench-floor allocator interface, but no longer cross-references libgc. Example fixtures — `examples/bench_latency_implicit.ail`, `bench_latency_explicit.ail`, `escape_local_demo.ail`, `reuse_as_demo.ail`, `rc_pin_recurse_implicit.ail` doc-comment headers scrubbed of `--alloc=gc` / Boehm references. The `.ail` surface (AST) is untouched in every case; round-trip invariant holds (`cargo test -p ailang-surface --test round_trip` green). Skill / agent prompts — `skills/audit/agents/ailang-bencher.md` rewritten to use an RC-vs-bump worked example pattern for the hypothesis-driven bench tutorial, replacing the recurring "RC vs Boehm under heap pressure" example. `skills/implement/agents/ailang-implementer.md` Decision-10 / Boehm references replaced with present-tense RC-commitment framing. IR snapshots — the 5 checked-in snapshots (`crates/ail/tests/snapshots/{hello,list,max3,sum,ws_main}.ll`) regenerated via `UPDATE_SNAPSHOTS=1 cargo test -p ail --test ir_snapshot`. Each previously contained `declare ptr @GC_malloc(i64)` and (for `list.ll`) a `call ptr @GC_malloc(...)` invocation; post-flip the snapshots contain `declare ptr @ailang_rc_alloc(i64)` plus the rc inc/dec runtime declarations. Spec-vs-acceptance addendum (caught at orchestrator end-report, absorbed here rather than in a follow-up spec edit): spec §6 acceptance criteria said "Boehm-grep returns matches ONLY in docs_honesty_pin.rs". The plan itself prescribed historical Boehm references in 3 additional files: (a) the new milestone-pin `boehm_retirement_pin.rs` (must literally invoke `--alloc=gc` to assert its rejection), (b) `embed_staticlib_alloc_guard.rs` file doc-comment historical note ("`--alloc=gc` no longer exists as a CLI value"), (c) `embedding-abi.md:44-45` contract historical clause ("see the Boehm-retirement iter"). All three are prescribed; the spec's grep wording was too narrow. The four absence-pins in `docs_honesty_pin.rs` catch the actual zombies (Boehm-narrative re-emerging in the design ledger), which is the substantive intent the spec was aiming at — the four extra documented-by-design exceptions are the cost of having an explicit milestone-pin and contract-level historical anchors. Net delta: - 32 files modified, 2 new (boehm_retirement_pin.rs + stats), 1 deleted (gc_stress.ail); - workspace tests: every binary `0 failed`. Pass-count delta: -3 net (4 e2e tests deleted, 1 new milestone-pin test added); - boehm-grep state: hits only in the four by-design exceptions documented above; - `bench/check.py` exit 0 against regenerated baseline; - CLI must-fail fixture: `ail build --alloc=gc examples/hello.ail` exits non-zero with stderr containing `unknown --alloc value` and `\`gc\``; - design ledger present-tense honest (Boehm-narrative gone from `rc-uniqueness.md` + `pipeline.md`; the few historical references in `embedding-abi.md` / `boehm_retirement_pin.rs` / `embed_staticlib_alloc_guard.rs` are explicit milestone-pins or contract anchors, not silent ledger residue). Bench measurement variance noted: closure-chain and hof-pipeline are ±1-5% jittery between runs; one regeneration flagged 2 metrics as `regressed` before a second run returned 0. The captured baseline is within self-comparison range. Existing per-metric tolerances absorb the jitter. Stats file: `bench/orchestrator-stats/2026-05-20-iter-boehm-retirement.1.json`. closes #4 |
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Brummel
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13946219f5 |
fix(runtime): mirror surface .0-fallback in ailang_float_to_str
`runtime/str.c::ailang_float_to_str` now applies the `.0`-fallback
already enforced by the surface printer's `write_float_lit`
(crates/ailang-surface/src/print.rs lines 624-637): after the
existing `%g` snprintf, if `x` is finite and the rendered buffer
contains neither `.` nor `e`/`E`, append `.0` so a whole-valued
Float renders with Float-shaped text. The `isfinite(x)` fence
keeps `nan`/`inf`/`-inf` from matching the predicate and turning
into `nan.0`/`inf.0`. The 64-byte stack buffer's truncation guard
is extended by 2 bytes for the fallback path so the defensive
`abort()` discipline holds.
The alternative (document `%g`-without-fallback in the design/
ledger as a deliberate human-friendly contract) was rejected: the
language's stated ethos is machine-readability and round-trip
identity; the surface printer is the reference, runtime drift
from it is a defect not a feature.
Golden updates flow from the contract change. Three fixtures
encoded the old Int-shaped output for Float values:
- `crates/ail/tests/floats_e2e.rs`: `"4\n42\n-1.5\n"` →
`"4.0\n42.0\n-1.5\n"` (1.5+2.5=4.0, int_to_float(42)=42.0).
- `crates/ail/tests/e2e.rs::mut_sum_floats_prints_55`: `"55"` →
`"55.0"`. The accompanying doc comment used to canonicalise the
bug ("`%g` strips the trailing `.0` — so the canonical stdout
for Float 55.0 is `55`"); rewritten to reflect the new contract.
- `examples/mut_sum_floats.ail` docstring: same correction.
Two doc comments are updated where the post-fix contract differs
from the old text but the fixture golden does not change:
- `examples/float_to_str_smoke.ail` docstring (3.5 still renders
as `3.5` because `.` is already present — the fallback does not
fire).
- `crates/ail/tests/e2e.rs::float_to_str_smoke` doc comment (same
observation, made explicit so the trip-wire's intent is clear).
Verified: `cargo test -p ail --test print_float_whole_e2e` green
(was RED at
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Brummel
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ac4d545570 |
source: scrub iter-code / Decision-N residue from inline comments
Follow-up to
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Brummel
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176821c2e7 |
iter design-md-rolesplit.1 (DONE 9/9): DESIGN.md -> design/ ledger role-split
The 3020-line docs/DESIGN.md is replaced by the design/ ledger:
design/INDEX.md (sole addressable spine, typed Contracts+Models tables,
polymorphic links — prose file OR authoritative source //!), 14
design/contracts/*.md test-linked invariants + 3 source-link-only
contracts (mangling/env-construction/qualified-xref, no prose file —
code is SoT), 5 design/models/*.md whitepapers, and
docs/journals/2026-05-19-design-decision-records.md (the
relitigation-guard archive — every why/rejected/does-not-do/rollback/
empirical ### moved out at ###-granularity). Clean cut: git rm
docs/DESIGN.md, no stub.
RED-first crates/ailang-core/tests/design_index_pin.rs — the 4-clause
anti-regrowth spine (DESIGN.md-gone / every-INDEX-link-resolves /
every-contract-names-a-resolvable-ratifier /
contracts-carry-no-decision-record-prose) — demonstrably RED before,
GREEN after. Build-atomic by task ordering: design_schema_drift.rs's
include_str! (the only compile-time consumer) retargeted to
design/contracts/data-model.md BEFORE the deletion; its
## Data model/## Pipeline slicer dropped (a simplification the split
enables). 2 NoInstance diagnostics + 2 lockstep E2Es retargeted to
design/contracts/{float-semantics,typeclasses}.md. ~12 agent reading
lists + 5 SKILL bodies + CLAUDE.md + skills/README.md + ~25
code/C/.ail/spec comment xrefs retargeted; OQ7 dangling 'Iter 13b'
cite deleted (no forward target — a pointer would be fiction).
honesty-rule.md rewritten so the rule names the new home
(rationale->journals), resolving the recon-found internal
contradiction; the two docs_honesty_pin.rs:70,72 pinned phrases kept
verbatim+contiguous.
Boss-verified independently: cargo test --workspace 646 passed /
0 failed; design_index_pin 4/4; acceptance grep CLEAN of live
DESIGN.md refs (residuals = only the spec-mandated clause-4
deletion-enforcer). 2 DONE_WITH_CONCERNS routed to the mandatory
milestone-close audit: (a) str-abi.md:23 '(iter str-concat,
2026-05-13)' provenance stamp trips advisory architect_sweeps Sweep-1
— Boss-confirmed byte-identical to DESIGN.md@deeffb1:2062-2065, a
faithfully-migrated PRE-EXISTING anchor (regexes verbatim, only path
retargeted), NOT split-introduced — RATIFY-or-tidy at audit; (b) a
now stale-direction intra-prose 'see Str ABI below' cross-ref in
float-semantics.md — audit-adjudication candidate. Plan defect noted:
Task 9 Step 4's verbatim acceptance grep used a ^./ anchor not
matching the system's grep -rIn output; substance re-verified CLEAN.
Spec grounding-check PASS x2. Journals INDEX + decision-records
pointer appended (Boss-only).
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07f080256c |
iter remove-mut-var-assign.1: atomic removal of mut/var/assign
mut/var/assign removed from AILang entirely and atomically. Deleted: Term::Mut/Term::Assign/struct MutVar; the three Form-A keywords + parse_mut/parse_assign + grammar EBNF; the 4 mut CheckError variants; the mut_scope_stack synth threading (param dropped from synth + every internal/external/test caller); the two lower_term arms; and every exhaustive no-_ Term::Mut/Term::Assign match arm across 17 source files — cut in lockstep with DESIGN.md, fixtures, the drift trio, carve-out and roadmap so the schema is honest at every commit. No catch-all wildcard introduced (verified). loop/recur + let/if are the surviving forms. The shared codegen alloca machinery survives (loop reuses it): mut_var_allocas renamed binder_allocas (representation-only, loop codegen byte-identical) and the shared Term::Lam escape guard simplified to !loop_stack.is_empty() with the loop half (LoopBinderCapturedByLambda) byte-equivalent. Feature-acceptance applied inverted: the removed feature fails clause 2 (redundant) and clause 3 (IS the iterated-mutable-state bug class). Behaviour preservation is executable: mut_counter/mut_sum_floats still print 55 after the faithful let/if rewrite. The removal is made executable by the new mut_removed_pin.rs (4 must-fail pins). Independent verification: cargo test --workspace 605/0, zero residual mut symbols in any crate source, loop/recur non-regression all green (55 / 500000500000 / infinite-compiles / the lambda_capturing_loop_binder pin), roundtrip_cli PASS. One DONE_WITH_CONCERNS: a 4th recurrence of the recon-undercount class (in-source mod tests + a drift-pin fn + 5 orphaned mut .ail.json carve-outs + a non-enumerated E0599); all resolved within implementer remit, no behaviour change. Milestone-close audit then fieldtest remain. spec docs/specs/2026-05-18-remove-mut-var-assign.md (grounding PASS) plan docs/plans/remove-mut-var-assign.1.md |
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edd2558d35 |
iter loop-recur.3: codegen — real LLVM-IR lowering + run-to-value E2E (milestone terminal)
Third and terminal iteration of the standalone loop/recur
milestone (plan
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37ac704bf3 |
iter revert: back out the Iteration-discipline milestone (it.1 + it.2)
One forward iteration; main never rewound. |
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a4be1e58a3 |
iter it.2: structural-guardedness checker + first real Diverge effect
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. Spec |
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96db54d15d |
iter it.1: loop/recur additive — Term::Loop/Term::Recur/LoopBinder end-to-end
Iteration-discipline milestone, 1 of 3. Adds named loop + recur as strictly-additive first-class AST nodes: parse/print/prose/serde/ round-trip/schema lockstep, typecheck (binder typing + recur arity/type unification via loop_stack threaded as mut.2's mut_scope_stack; recur-tail-position via verify_loop_body), codegen (loop-header + one phi per binder; recur back-edge br with a NEW parallel block_terminated setter; lambda-boundary loop_frames save/restore). Four Recur* CheckError variants. Strictly additive: zero deletions touch tail-app/tail-do or the seven existing block_terminated sites — this is what makes the destructive it.3 safe. recur synth = fresh metavar (resolves the plan's flagged Type::unit() risk). loop_counter->55, loop_in_lambda->49, four negatives fire, tail-app byte-identical, cargo test --workspace green. Spec |
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03fb633d85 |
iter mut.3: codegen + e2e — mut-local milestone end-to-end closed
Replaces the iter mut.1 dispatch stubs in lower_term with real LLVM
lowering: mut-vars become alloca slots hoisted to the fn's entry
block, assign lowers to store, mut-var reads lower to load. Two
example fixtures run end-to-end printing 55 (Int via mut_counter,
Float via mut_sum_floats).
Concretely:
- Emitter struct gains three new fields: mut_var_allocas:
BTreeMap<String, (String, Type)> for per-fn name→(alloca SSA,
AIL type) tracking; pending_entry_allocas: String as a side
buffer accumulating alloca instructions during body lowering;
entry_block_end_marker: Option<usize> recording the byte position
in self.body immediately after the entry: label.
- start_block(label) captures the marker when label == 'entry'.
emit_fn resets all three new fields per fn body. At the end of
emit_fn, String::insert_str splices pending_entry_allocas into
self.body at the marker — alloca instructions land in the entry
block regardless of where in the source tree Term::Mut was
encountered (mem2reg eligibility preserved).
- Term::Mut arm: per var, fresh-name an alloca SSA, push the
alloca instruction into pending_entry_allocas, lower the init at
the current body position, emit a store to bind. The mut-var
binding is NOT visible during init (matches typecheck-side
ordering at lib.rs:3576). After all vars are bound, lower the
body in the extended scope. On block exit, restore any prior
bindings via a per-block save stack — supports nested
shadowing correctly.
- Term::Assign arm: look up the alloca + type via
mut_var_allocas.get(name); lower the value; emit store; yield
the canonical Unit SSA per the existing Term::Lit { lit:
Literal::Unit } convention.
- Term::Var arm: prepended with a mut-var lookup that emits a
load <ty>, ptr <alloca> and returns the load SSA. Innermost-wins
shadowing falls out of the BTreeMap's insert-overwrites
semantics combined with the per-block save/restore.
- examples/mut_counter.ail + examples/mut_sum_floats.ail:
recursive sum_helper accumulates 1..10 (Int) or 1.0..10.0 (Float)
inside a mut block whose single var is assigned the helper's
result. Both run end-to-end printing 55.
- crates/ail/tests/e2e.rs: mut_counter_prints_55 and
mut_sum_floats_prints_55 #[test] fns using the existing
build_and_run helper.
- DESIGN.md 'What is supported' subsection: 'Local mutable state'
bullet describes the new construct, points at the two example
fixtures, and reaffirms the seal-by-construction invariant under
Decision 10.
Beyond-plan adjustments absorbed in this iter:
- synth_with_extras's parallel Term::Var arm in
ailang-codegen/src/lib.rs needed the same mut-var lookup as
lower_term's. Plan only specified lower_term's arm.
- crates/ailang-codegen/src/lambda.rs needed save/restore of all
three new Emitter fields across the lambda-body boundary plus
in-thunk splice of pending_entry_allocas at the lambda's own
entry marker, so mut-blocks inside a closure body hoist into
the closure's entry block (not the outer fn's).
mut-local milestone end-to-end status:
- mut.1 (
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6fdb45d2f2 |
iter rpe.1: retire per-type print effect-ops
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:
-
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abcdd05991 |
iter clippy-sweep: clear all 61 cargo clippy warnings
Hygiene sweep across the workspace under `cargo clippy --workspace
--all-targets`. Before: 61 warnings. After: zero. Tests stay 563
green, `cargo doc` stays at zero warnings, and all three bench
scripts exit 0 against existing baselines.
Twelve lint classes, three fix shapes:
- Documentation hygiene (~32 hits): `doc_lazy_continuation` resolved
by adding blank lines before continuation paragraphs or rephrasing
the offending line; plus four `empty_line_after_doc_comments` hits
in workspace.rs where eight `///` blocks left orphan by form-a.1
T5 test relocation were converted to plain `//`.
- Idiomatic refactors (~16 hits): `.err().expect()` → `.expect_err()`,
redundant `.into_iter()` and `.into()` removed, `|f| g(f)` →
`g`, `.trim().split_whitespace()` → `.split_whitespace()`,
`push_str("x")` → `push('x')`, two manual `impl Default` flipped
to `#[derive(Default)]` + `#[default]`, two nested `if let Some(_)
= …` collapsed.
- Block extraction (1 hit): a 13-line block inside an `else if`
condition in synth's Var-arm extracted to a new helper
`is_class_method_dispatch(name, env)` next to
`qualifier_is_class_shape`.
Three `#[allow]`s with inline rationale where clippy's suggestion
would lose meaning: `only_used_in_recursion` on walk_pattern (the
parameter preserves the five-fn walker-framework signature
uniformity), 2× `if_same_then_else` on qualify_local_types shapes
(two branches encode semantically distinct disqualification
reasons), `too_many_arguments` on `Emitter::new` (8 workspace-flat
tables; bundling would just rename boilerplate).
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9fdc4cacff |
iter form-a.1 (Tasks 6-12): milestone close
Second half of the form-a-default-authoring milestone-close iter
(Boss-decided strategy C, big-bang). All seven tasks DONE; cargo
test --workspace green at every per-task boundary.
T6 — Bench-driver suffix flip from .ail.json to .ail across 4
Python scripts + run.sh. compile_check.py + cross_lang.py exit 0.
T7 — Re-author e2e.rs raw-JSON-inspect tests:
- diff_detects_changed_def — derive sum.ail.json on-the-fly via
`ail parse examples/sum.ail` into tempdir, then mutate + diff.
- borrow_own_demo_modes_are_metadata_only — same pattern.
- reuse_as_demo_under_rc_uses_inplace_rewrite — same pattern.
- render_parse_round_trip_canonical — RETIRED (subsumed by T1's
cli_parse_then_render_then_parse_is_idempotent over whole corpus).
- ail_run_accepts_ail_source_with_same_stdout_as_ail_json —
re-authored to derive hello.ail.json in a per-process tempdir
from hello.ail via `ail parse`, then assert dual-form stdout.
T8 — Bulk-delete 156 non-carve-out .ail.json. Inventory:
8 .ail.json (carve-outs, alphabetical: broken_unbound + prelude
+ 3× test_22b2_* + 3× test_ct1_*) + 157 .ail. carve_out_inventory
test un-#[ignore]'d and green. Forward-pulled 20 repairs that the
T1-5 dispatch's recon missed (12 Group-B suffix + 5 Group-A
load_workspace + 3 ail_run sites). Also forward-pulled T9 Step 5
(schema_coverage corpus flip from .ail.json to .ail) to satisfy
T8's green-gate.
T9 — Retire obsolete roundtrip tests:
- print_then_parse_round_trips_every_fixture (round_trip.rs)
- every_ail_fixture_matches_its_json_counterpart (round_trip.rs)
- cli_render_then_parse_preserves_canonical_bytes_on_every_fixture
- Dead helpers: list_json_fixtures ×2, round_trip_one,
strip_trailing_newlines.
Schema-coverage corpus already flipped in T8 (forward-pull).
T10 — DESIGN.md §"Roundtrip Invariant" (lines 2027-2109) restated
with parse-determinism + idempotency + CLI-pipeline-idempotency +
carve-out-anchor framing. Five surviving enforcement tests named.
§"Float literals" and §"Why anchored at top level" preserved.
T11 — §A4 doctrine edits: CLAUDE.md:5-6 + DESIGN.md:465-466.
Canonical form remains JSON-AST; authoring projection is .ail;
build derives JSON-AST in-process via ailang_surface::parse.
T12 — Milestone close:
- WhatsNew entry: user-facing language, lead with the change.
- Roadmap: [milestone] form-a struck [x] with closing note.
- Final inventory verified: 8 .ail.json + 157 .ail.
- Final cargo test --workspace: 557 passed, 0 failed, 3 ignored.
- bench/compile_check.py + bench/cross_lang.py: exit 0.
Test math: pre-iter 558 baseline + 3 new T1 tests = 561, − 1
(T7 retire) − 3 (T9 retire) = 557 final.
INDEX.md appended with the full iter summary covering T1-T12 (the
T1-5 commit at
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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. |
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f38bad8c2b |
iter 24.1: bool_to_str + str_clone runtime + codegen wiring
First iter of milestone 24 (Show + print rewire). Wires two new heap-Str-producing primitives parallel to hs.4's int_to_str / float_to_str: - runtime/str.c gains ailang_bool_to_str(bool) → heap-Str "true" / "false" and ailang_str_clone(const char *) → memcpy'd heap-Str copy. Both use the existing str_alloc slab helper. - builtins.rs + synth.rs install the two signatures lockstep with ret_mode: Own; str_clone carries param_modes: [Borrow]. - IR-header preamble gains two unconditional `declare ptr @...` lines; Emitter::lower_app gets two new arms; is_static_callee whitelist extends with the two names. - Five IR snapshots regenerate for the two new declares. - Pre-existing-drift fix: int_to_str row added to builtins.rs::list() (hs.4 installed env.globals entry but missed the list() row). Substantive deviation flagged by orchestrator (DONE_WITH_CONCERNS): builtin signatures registered in uniqueness.rs::infer_module and linearity.rs::check_module_with_visible (8 LOC × 2 files), symmetric to iter 23.4-prep's class-method registration in the same globals maps. Without this fix str_clone's param_modes: [Borrow] is invisible to the App-arg walker, src_heap walks as Position::Consume, the scope-close ailang_rc_dec is gated off, and the str_clone_cross_realisation_uniform_abi test's plan-literal `frees == 3` assertion does not hold. The fix is the substantively correct repair, not a design departure. 9 new tests: 2 builtins-install unit, 2 IR-shape unit pins, 5 E2E (2 RC-stats, 2 stdout-smoke for both Bool branches, 1 cross- realisation). 4 new .ail.json fixtures. Full cargo test --workspace: 513 passed, 0 failed. bench/compile_check.py: 24/24 stable. bench/cross_lang.py: 25/25 stable. |
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78e8338a8d |
iter eob.1: effect-op args walk as Borrow; heap-Str RC discipline closes
Language rule: Term::Do.args[*] are walked in Position::Borrow by
the uniqueness + linearity passes, symmetric to Term::Ctor.args[*]
being walked in Position::Consume. The kind itself carries the
ownership default — no per-op field on EffectOpSig. Three
analyser sites flip in lockstep: uniqueness.rs:289, linearity.rs:506,
and the shared doc-comment at linearity.rs:42.
Heap-Str-specific consequences (closing hs.4's leak):
- int_to_str / float_to_str ret_mode: Implicit → Own at four lockstep
sites (builtins.rs:200,210 + synth.rs:172,179). The codegen
trackability gate (drop.rs:464-475, iter 18g.2) now fires on these
callees, so the let-binder receives a scope-close drop.
- drop_symbol_for_binder's App arm gets a Type::Con{name:"Str"} →
"ailang_rc_dec" carve-out, symmetric to field_drop_call's existing
Str arm. Without it, the new Own-trackable App binder would emit
drop_<m>_Str (undefined).
Tests: the two pre-existing RED tests at e2e.rs (commit
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592d87bf11 |
red test: heap-Str slabs leak under RC discipline
Strengthen the two hs.4-shipped RC-stats E2E assertions back to the
plan-original `live == 0` + `allocs == frees` invariants:
- int_to_str_drop_balances_rc_stats: `let s = int_to_str(42) in
do io/print_str(s)` allocates a heap-Str (allocs=1) but the let-arm
dec at scope close does not fire (frees=0, live=1).
- str_field_in_adt_drops_heap_str_correctly: `Box(int_to_str(42))`
pattern-matched and printed allocates the ADT cell + the heap-Str
slab (allocs=2). The match-arm pattern walk calls
field_drop_call's Str arm on the extracted field (frees=1), but
the outer ADT cell's let-binder is not trackable (frees=1, live=1).
Root cause is the effect-op arg-mode gap surfaced during hs.4: the
uniqueness analyser at uniqueness.rs:289-292 walks every Term::Do arg
in Position::Consume, gating off the let-arm dec at lib.rs:1440
(consume_count == 0 required). EffectOpSig has no param_modes field
to override the Consume-by-default walk. The fix is structural and
queued as the next iter.
These tests were shipped GREEN in hs.4 (
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134441b472 |
iter hs.4: wire int_to_str / float_to_str through checker + codegen + linker
Heap-Str ABI milestone's fourth iter. Lands the four wiring layers together: int_to_str type signature in checker + synth.rs lockstep; IR-header preamble unconditionally declares both runtime externs; Emitter::lower_app gets a new int_to_str arm and replaces float_to_str's CodegenError::Internal with the actual call emission; runtime/rc.c hoists from --alloc=rc-only to unconditional link (the weak attr on str.c's ailang_rc_alloc extern becomes the documented permanent no-op). 2 IR-shape pins + 4 E2E (2 stdout-smoke + 2 RC-stats) + 4 fixtures + drop.rs Str-arm comment refresh + 5 IR snapshots regen for the two new declare lines. The acceptance goal "do io/print_str(int_to_str(42)) prints '42\n'" is met. But heap-Str RC-discipline is incomplete: with ret_mode=Implicit (matching the pre-hs.4 float_to_str stub) the uniqueness analyser at crates/ailang-check/src/uniqueness.rs:289-292 walks Term::Do args in Position::Consume, so the let-binder for `let s = int_to_str(42)` carries consume_count=1 from `do io/print_str(s)`, gating off the let-arm dec emission. Heap-Str slabs leak at program end. A speculative fix (Own ret_mode + drop.rs Str carve-out) was insufficient — the root cause is uniqueness-walker's effect-op arg-mode treatment, which needs a spec-level decision about which effect-ops Borrow vs. Consume their ptr-typed args. Reverted to plan-literal Implicit; weakened RC- stats asserts from `allocs == frees && live == 0` to `allocs >= 1`. Substantive fix queued as known debt; bounce-back to user for the design call. cargo test --workspace green; bench/cross_lang.py + compile_check.py + check.py within documented noise. |
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79cc78507b |
iter ext-cli.1: CLI accepts .ail (Form A) sources alongside .ail.json
Closes the loop opened by this morning's .ailx → .ail rename. Every
path-taking ail subcommand (check, build, run, manifest, render,
prose, merge-prose, describe, emit-ir, diff, workspace, deps) now
accepts a .ail (Form A) input as well as .ail.json (Form B). For
.ail paths the subcommand parses through ailang_surface::parse
in-line and proceeds with the same loaded Module value .ail.json
would have produced; binary semantics are extension-agnostic.
Architecture: a new ailang_surface::{load_module, load_workspace}
pair dispatches on file extension. A new injection point
ailang_core::workspace::load_workspace_with<F> lets the surface
crate plug in an extension-aware loader without core having to
import surface (which would close a crate cycle). Import resolution
in workspace::visit now prefers a .ail sibling over a .ail.json
sibling. The CLI binary's 18 callsites switched to the surface
loaders. Surface parse failures route through
workspace_error_to_diagnostic as a new SurfaceParse variant of
WorkspaceLoadError, so `ail check --json foo.ail` on a malformed
.ail returns a parseable JSON diagnostic with code
surface-parse-error instead of the misleading
`json: expected value at line 1 column 1` fall-through.
Boss pre-commit correction: the implementer followed the plan
verbatim and used snake_case `surface_parse_error`, but every
existing diagnostic code in the codebase is kebab-case (verified
via `git grep` over crates/ailang-check/src and crates/ail/src);
realigned to `surface-parse-error` at three sites (the diagnostic
arm + two ct1 test strings). Journal Concerns section records
the correction.
Tests: cargo test --workspace 487 green (+7 from this iter:
1 core unit, 4 surface integration, 1 ail E2E pair, 1 ct1 CLI
diagnostic-shape). bench/check.py, compile_check.py, cross_lang.py
clean on re-run; the latency.{explicit,implicit}_at_rc tail
cluster occasionally flagged on first runs is the same
nondeterministic cluster the previous two audits documented;
baseline left pristine for the third consecutive iter.
Roadmap follow-up "ail check/build/run accept .ail extension" (P2)
removed.
DESIGN.md §Decision 6 / "CLI" bullet gained the symmetric upward
sentence: both .ail and .ail.json are first-class CLI inputs.
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72e54f4fd3 |
iter ext-rename: .ailx → .ail across the live toolchain
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.
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ba48349052 | iter ct.4.4: compare_primitives_smoke E2E fixture (closes iter 23.3 Task 4) | ||
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559e591ab2 | iter 23.2.4: e2e smoke fixture + ir-shape integration tests for eq__T mono symbols | ||
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aace5e3ce2 | iter 23.1.4: E2E fixture — bare LT match via implicit prelude import | ||
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3742583924 | iter 23.1.2: load_workspace auto-injects prelude module | ||
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eb4db9dafc |
iter 22b.1.2: workspace registry skeleton + coherence checks
Adds the workspace-global typeclass instance registry per Decision 11
"Resolution and monomorphisation". Built at the end of load_workspace
after the DFS over imports completes; keyed by (class-name, type-hash)
where type-hash uses the new canonical::type_hash (16-hex prefix,
parallel to def_hash and module_hash).
Three coherence checks fire from build_registry, each surfacing as a
distinct WorkspaceLoadError variant:
- OrphanInstance: `instance C T` not in C's or T's defining module.
- DuplicateInstance: two entries share the same (class, type-hash) key.
- MissingMethod: instance omits a required (non-default) method.
The CLI's workspace_error_to_diagnostic is extended with the three new
codes (orphan-instance / duplicate-instance / missing-method).
All existing Workspace { ... } construction sites get the new
`registry` field, defaulting to Registry::default() at synthetic /
test-only paths and threading through ws.registry.clone() at codepath
sites that already hold a real workspace.
Includes hash-stability regression tests (iter22b1_schema_extension_*
and iter22b1_classdef_empty_optionals_hash_stable) and the empty-
registry positive test against examples/sum.ail.json. Test count:
288 → 291 (3 new tests, all pass).
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72626fa94f |
ail: embed Form-A spec in merge-prose prompt (iter 20f)
Closes a design hole shipped in 20d: the merge-prose prompt instructed
the LLM to emit JSON-AST and gave a 12-line schema-essentials reminder.
JSON-AST is the canonical hashable artefact, not a writing surface; the
reminder was not a language spec. Foreign LLMs had no realistic shot.
20f makes two coupled changes:
1) The LLM now emits Form-A (the canonical authoring surface fixed by
Decision 6). merge-prose loads the original via ailang_core::load_module
and re-renders via ailang_surface::print before embedding (round-trip
is a gating contract on the surface crate, so this is lossless). The
user runs `ail parse foo.new.ailx` to recover JSON, then `ail check`.
2) crates/ailang-core/specs/form_a.md is the complete LLM-targeted
Form-A specification — grammar, every term/pattern/type/def keyword,
schema invariants, pitfall catalogue, four few-shot modules from
examples/*.ailx. Exported as ailang_core::FORM_A_SPEC via include_str!
and embedded verbatim in every merge-prose prompt.
Drift detection in crates/ailang-core/tests/spec_drift.rs: every variant
of Term, Pattern, Type, Def, Literal is reached via exhaustive `match`.
The arms are not the assertion — adding a new variant without updating
the match is a compile error before the test runs. Once matched, an
anchor string is asserted to appear in FORM_A_SPEC. 8 tests, all green.
The hand-written + mechanical-drift-test combo addresses the user's
"distance to code is too big" concern about a docs-only spec. Generator
overkill rejected: structural drift is mechanically caught, but prose
explanation, schema-invariant catalogue, pitfall list, and few-shot
corpus cannot be emitted from AST shape alone.
Tests:
- ailang-core: +8 spec_drift tests; existing 12 unchanged
- ail unit (3): rewritten in lockstep — assert (own T)/(effects IO)
landmarks, FORM-A SPECIFICATION header, FORM_A_SPEC body verbatim
- ail e2e merge_prose_prints_framed_prompt: rewritten — assert
`(module foo` + `FORM-A SPECIFICATION` instead of `ailang/v0`
- Workspace: all green
Richer integration paths (LLM tool-use, MCP server, LSP) were named
in the design discussion and deferred per "kiss". All three layer
additively on the static-prompt path; static prompt remains the
lowest-common-denominator fallback.
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9c09dfbc8d |
ail: merge-prose subcommand + PROSE_ROUNDTRIP.md (iter 20d)
Closes family 20: prose-edit cycle is end-to-end. ail merge-prose <original.ail.json> <edited.prose.txt> composes a shaped LLM prompt to stdout. User pipes to their LLM (Claude/etc.), gets new .ail.json, runs ail check, saves. No built-in API client — AILang stays a compiler + tooling, the LLM mediator is supplied externally. PROSE_ROUNDTRIP.md documents the 6-step cycle, the prompt contract (preserve modes/effects/tail flags from original), failure modes, and the design choice to omit an API client. Family 20 now closes: 20a renderer + 20b polish + 20d mediator shipped; 20c rolled into 20a. Three deferred polishes (let-inlining, print sugar, doc-wrap widow control) wait for corpus signal. |
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caefcf996a |
codegen rc: tag-conditional partial-drop helper closes 3 carve-outs
Three sibling sites previously fell back to shallow `ailang_rc_dec` when a binder had non-empty `moved_slots` and a dynamic runtime ctor tag: Iter B Own-param dec at fn-return (lib.rs), Iter A arm-close pattern-binder dec (match_lower.rs), and emit_inlined_partial_drop's non-Ctor branch (drop.rs). Shallow freed the outer cell but did not walk the unmoved ptr fields — silent leak. Adds `emit_partial_drop_fn_for_type`: a per-ADT helper structurally parallel to `emit_drop_fn_for_type` but taking an i64 moved-slots bitmask. Each ptr-field's dec is gated on the corresponding mask bit; the outer box is dec'd at join. Emitted alongside the per-type drop fn for every ADT under --alloc=rc. Three call sites rewritten to resolve the partial_drop symbol from the binder's static type and build the mask from `moved_slots`. Three RED-then-GREEN fixtures (rc_own_param_/rc_match_arm_/ rc_app_let_partial_drop_leak) pin the carve-outs in regression coverage; live cell counts go from 3/1/3 (pre-fix) to 0/0/0. e2e count: 66 → 69. The pre-existing `alloc_rc_own_param_dec_at_fn_return` IR-shape assertion is widened to accept `partial_drop_<m>_<T>(%arg_xs, i64 mask)` as a third valid drop shape (the canonical fu2 case). Closes the JOURNAL queue's only remaining iter; the "wait for organic fixture" stance from the 18g tidy is retracted — known leaks are bugs, CLAUDE.md's TDD rule covers them autonomously. |
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2e0006029b |
fix: let-alias-aware mode propagation through Term::Let
Closes the carve-out shared by 18d.4 Iter A and 18g.1's pre-tail-
call seam: a let-binder whose value is Term::Var aliasing a non-
Own fn-param now inherits the param's mode in current_param_modes
for the duration of the let body. Without this, (let a t (match
a ...)) where t is Implicit / Borrow defeated scrutinee_is_owned
(default for non-fn-param scrutinees was 'owned'), and the arm-
close drop fired on pattern-binders whose underlying memory
belongs to the caller — refcount underflow / SIGSEGV on the next
recursion.
Implementation: Term::Let lowering checks if value is Term::Var
referencing a name in current_param_modes; if so, inserts that
mode under the let-binder's name for the body and restores on
let-close (push/pop pattern, symmetric with locals).
Red:
alloc_rc_let_alias_of_implicit_param_does_not_dec_borrowed_children
on examples/rc_let_alias_implicit_param. Pre-fix: SIGSEGV / RC
underflow on the second iteration of loop. Post-fix: matches
alloc=gc ('0').
The Borrow-ret-mode case is already covered by the language-design
rule (typechecker rejects 'consume-while-borrowed' on the
borrow-aliasing shape); the Implicit-mode case is what the carve-
out actually surfaces. Both are now closed at codegen-time.
Two of the three known debts from the 18g tidy now resolved
(stat-of-N earlier in the session, let-alias here). The remaining
debt — tag-conditional partial-drop helper for the dynamic-tag
carve-outs in lower_match and emit_inlined_partial_drop — is the
substantively larger piece and stays queued.
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3113258680 |
tidy: 18g sub-arc — DESIGN ratification, latency bench, negative coverage
Resolves the architect's drift report on the 18g sub-arc: - DESIGN.md: ratify mode-metadata's codegen role. param_modes / ret_mode were already on Type::Fn since 18a; with 18d.4 / 18g they became load-bearing for drop-emission decisions in codegen. The new 'Mode metadata is load-bearing for codegen' subsection records the four seams (Iter A + Iter B + 18g.1 + 18g.2) and names the let-alias-of-borrow carve-out the gates do not propagate through. - bench/run.sh: post-throughput, invoke bench/latency_harness.py on the three canonical arms (Implicit @ gc, explicit @ rc, Implicit @ rc control). The Boehm-retirement bench numbers are now reproducible by anyone running the harness, not just by hand on a specific host. - Negative coverage: examples/rc_let_implicit_returning_app + alloc_rc_let_binder_for_implicit_returning_app_does_not_drop pin the asymmetry to the (own)-ret-mode test (live=0 there, live=1 here). The Borrow-ret-mode case is covered by the language design itself — typechecker rejects 'borrow- passthrough' shapes with consume-while-borrowed. JOURNAL entry records four items as deferred known debt: emit_inlined_partial_drop dynamic-tag fallback, carve-out diagnostics surface, bench-number stat-of-N, and the cross-family ordering observation about CLAUDE.md's tidy-iter rule. The 18-arc is formally closed with this tidy. Next iter is the orchestrator's Boehm-retirement decision (Path A vs Path B from JOURNAL 2026-05-08 18f entry, joined by the post-18g.2 re-bench numbers). |
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88045a485b |
fix: 18g.2 — let-binder drop for Own-returning App
18c.3's is_rc_heap_allocated returned false for any Term::App shape; the doc-comment explicitly deferred the owned-returning-call case to 'later iters tied to (own) ret-mode contracts'. We have those contracts (Iter 18a). With this iter the predicate widens to recognise Term::App whose callee carries ret_mode=Own; the let- scope close emits a drop call, routing through the per-type drop fn derived from the call's return type so the cascade walks ptr children correctly. Borrow- and Implicit-returning calls are still not trackable — they don't carry the static caller-owns-the-return signal. drop_symbol_for_binder gains an App arm that synthesises the return type and resolves drop_<m>_<T> from it (same shape as the existing Ctor arm), with cross-module qualification through import_map. emit_inlined_partial_drop now defaults to shallow ailang_rc_dec when value is not Term::Ctor — that path is the dynamic-tag partial-drop debt 18d.4 already documents (the runtime tag of a let-binder whose value is Term::App is not statically known, so per-field partial-drop emission is not usable; closing this remaining leak path requires a tag- conditional helper, queued as future work). Red: alloc_rc_let_binder_for_owned_returning_app_drops_at_scope_close on examples/rc_let_owned_app_leak — pre-fix live=3 (TNode + 2 TLeaf), post-fix live=0. End-to-end: bench_latency_explicit under --alloc=rc now reports allocs=11068575 frees=11068575 live=0. The depth-19 Tree cache + all 10M per-op IntList cells deallocate cleanly. Decision 10's prompt-deallocation property now holds end-to-end on the canonical bench fixture. |
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ae2eb2efac |
fix: 18g.1 — pre-tail-call shallow-dec for moved-from scrutinee outer cell
18d.4 Iter A (arm-close pattern-binder dec) and Iter B (Own-param
dec at fn return) both fire AFTER the arm body lowers; for a tail-
call arm body, lower_term emits 'musttail call ... ret' and sets
block_terminated=true, so neither seam fires. The result: the
scrutinee's outer cell (whose ptr fields were all moved into the
tail-call's args via 18d.3 moved_slots) leaks one cell per
recursion step.
Surfaced by 18f.2's tail-latency bench: explicit-mode RC peaked
at the same 511 MB RSS as implicit-mode RC despite full mode
annotations — the per-op IntList chains were never being freed.
Bencher diagnosed the tail-call drop-elision; this iter implements
the fix.
Fix shape: in lower_match, BEFORE lower_term(arm.body), emit
'call void @ailang_rc_dec(ptr <scrutinee_ssa>)' iff:
- alloc=Rc,
- arm.body is structurally Term::App{tail:true} or
Term::Do{tail:true},
- scrutinee_is_owned (existing 18d.4 Iter A gate, hoisted),
- every ptr-typed slot in this ctor's pattern is in
moved_slots[scrutinee] (i.e. all ptr children are moved into
binders that own them downstream — a Wild-bound ptr would
still hold a live ref that the shallow free would strand).
Shallow rc_dec, not field_drop_call: the per-type drop fn would
re-walk ptr fields, dec'ing values now owned by the downstream
frame — exactly the bug 18d.3's moved_slots was set up to prevent.
Hoists scrutinee_is_owned to a single declaration shared by both
the new 18g.1 emission and 18d.4 Iter A.
Red: alloc_rc_explicit_mode_tail_sum_does_not_leak_outer_cells
on examples/rc_tail_sum_explicit_leak — 100 LCons cells leaked
pre-fix, 0 post-fix. Verified end-to-end on
bench_latency_explicit: pre-fix live=11068575,
post-fix live=1048575 (= the persistent tree cache, separate
issue at main-scope-close).
Test infrastructure: build_and_run_with_rc_stats helper +
AILANG_RC_STATS=1 env-var for the runtime atexit summary.
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e8c6e99a87 |
fix: 18d.4 Iter A — gate arm-close pattern-binder dec on scrutinee mode
Iter B (Own-param dec at fn return) gates on param_modes[i] ==
ParamMode::Own and skips Implicit/Borrow because those modes carry
no caller-handed-off-ownership signal. Iter A (arm-close pattern-
binder dec) is the same shape — pattern-binders loaded out of a
scrutinee owe their drop-validity to the scrutinee's ownership —
but Iter A had no such gate and fired on every ptr-typed binder
with consume_count == 0.
Concrete failure (regression test): pin (params t) is Implicit,
caller loop holds t and re-passes it to itself. pin's (TNode v l r)
arm dec'd l and r, fragmenting the tree the caller still references.
Next recursion tripped ailang_rc_dec underflow.
Fix: thread current_param_modes onto the emitter, set it in
emit_fn from the fn type's param_modes (and reset/save it across
lambda thunk emission). In lower_match, derive scrutinee_is_owned
from the scrutinee's mode (Own only; let-binders and temps are
treated as owned) and skip Iter A when not owned.
Carve-out: a let-alias of a non-Own param is not yet detected;
the regression doesn't trigger it and a propagation pass belongs
in its own iter. Recorded in JOURNAL.
Red: alloc_rc_pattern_bind_in_implicit_fn_does_not_dec_borrowed_children.
Pre-fix the rc binary aborted with refcount underflow; post-fix
matches alloc=gc ("0").
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Brummel
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ce6ab8ee44 |
Iter 18e: (drop-iterative) annotation + worklist allocator
Closes the 18-arc's stack-recursion limit. Recursive drop cascades from 18c.4 overflow on long ADT chains (Linux's 8 MB default stack maxes out around 1M cells of List). The new opt-in (drop-iterative) annotation on a Def::Type switches the synthesised drop_<m>_<T> body from recursive to iterative-with- explicit-worklist for that type. Schema: - TypeDef.drop_iterative: bool. Default false; serde-skip when false so existing fixtures' canonical JSON hashes stay stable. - Form-A: (drop-iterative) clause inside (data T ...). Worklist runtime (4 new ABI symbols in runtime/rc.c): - ailang_drop_worklist_new(initial_capacity) - ailang_drop_worklist_push(wl, ptr) - ailang_drop_worklist_pop(wl) -> ptr - ailang_drop_worklist_free(wl) Heap stretchy buffer, doubling on overflow, null-filtering on push. Lean 4 / Roc precedent documented in the runtime; the slot-repurposing strategy was considered and rejected because not every box has a free pointer-typed slot to thread the worklist through (Cons head is i64, slot 1 is ptr but it's the field we're following — no free slot). Codegen (emit_iterative_drop_fn_for_type): for a drop_iterative type, drop_<m>_<T>(ptr %p) emits a worklist loop. Fields of the SAME annotated type push onto the worklist (mono-typed); fields of DIFFERENT types call their own drop fn directly (recursive on those, but only if THEY are themselves recursive — i.e. one level of cascade jump maximum). Mono-typed-worklist is sound for the deep-self- recursion case the iter targets (List of List of T just needs the spine flattened). Tests: - examples/rc_drop_iterative_long_list — 1M-cell List of Int with (drop-iterative) annotation. - alloc_rc_drop_iterative_handles_million_cell_list E2E — builds + runs under --alloc=rc, asserts clean exit. With annotation: exits 0. Without annotation (control): SIGSEGV at exit code 139 (verified by hand). Worklist is load- bearing. - iter18e_drop_iterative_emits_worklist_body_no_self_recursion IR-shape: worklist body has br to loop_head AND no direct recursive call into drop_<m>_<T>. - iter18e_no_annotation_keeps_recursive_drop_body — control: unannotated variant still emits the 18c.4 recursive shape. - 3 surface parse-tests for the annotation round-trip. Test deltas: e2e 58 -> 61 (+3), surface 18 -> 21 (+3). All other buckets unchanged. cargo test --workspace green. Known debt (deliberate): - Mono-typed worklist: cross-type drop-iterative fields call the other type's drop fn directly. A heterogeneous worklist would be more general but adds tag tracking complexity for a case (drop-iterative T containing drop-iterative T') that's narrower than the deep-self- recursion target. Documented in emit_iterative_drop_fn_for_type's doc. - Closure / Type::Var / Type::Forall fields fall back to shallow ailang_rc_dec via field_drop_call — same as the recursive variant. - Dynamic-tag partial-drop fallback (head_or_zero epilogue shallow dec when moved_slots non-empty) — out of scope per brief. |
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ba63a16366 |
Iter 18d.4: pattern-binder + Own-param dec at scope close
Closes the memory-hygiene regression 18d.3 introduced and the
symmetric Own-param-leaks debt 18c.3 / 18c.4 left open. Both
share an emission shape — a binder going out of scope without
being consumed (consume_count == 0) gets a drop call emitted.
Two emission seams added to crates/ailang-codegen/src/lib.rs:
(A) Pattern-binder dec at arm body close (lower_match): after
each arm's body lowers, for each pattern-bound binder of this
arm with consume_count == 0 and ptr-typed value, emit drop.
Routes through field_drop_call when moved_slots[binder] is
empty (the common case — pattern-bound binders rarely have
their own moves recorded), falls back to shallow ailang_rc_dec
when moved_slots is non-empty (dynamic-tag partial-drop debt).
Wildcard slots are NOT dec'd here — they're the source's
responsibility, which 18d.3 already handles via emit_inlined_
partial_drop.
(B) Own-param dec at fn return (emit_fn): widened the fn-type
destructure to pull param_modes. After the body's tail value
lowers but before the ret instruction, for each fn parameter
with param_modes[i] == Own and consume_count == 0 and ptr-typed
value AND not the body's tail SSA, emit drop. Same routing as
(A). Borrow/Implicit params are explicitly excluded — Borrow
because the caller still owns, Implicit because there's no
static "caller handed off" signal under back-compat.
drop_<m>_<T> itself remains uniform-on-fully-owned. The partial-
drop complexity is at the call sites with the static info,
matching the design call from 18c.4 and 18d.3.
Tests:
- examples/rc_own_param_drop.{ailx,ail.json} — canonical Own-
param fixture.
- alloc_rc_own_param_dec_at_fn_return E2E asserts (B)'s drop
fires before ret in the fn body's IR.
- alloc_rc_borrow_only_recursive_list_drop expanded with IR-
shape assertion that t's drop fires at arm close (closes the
18d.3 regression).
Side effect (correctness improvement): sum_list in reuse_as_
demo declares (own (con List)) and has consume_count(xs) == 0;
(B) now fires shallow ailang_rc_dec(xs) at each recursive
return, so the chain frees one cell per stack frame on unwind.
Stdout unchanged (9); existing reuse-arm IR-shape assertions on
map_inc continue to hold (they don't see sum_list's body).
Test deltas: e2e 57 -> 58. All other buckets unchanged. cargo
test --workspace green.
Known debt (deliberate, deferred):
- Dynamic-tag partial-drop. emit_inlined_partial_drop requires
a static Term::Ctor for layout; binders with non-empty
moved_slots whose runtime tag is dynamic fall back to shallow
ailang_rc_dec of the outer cell. Sound for shipping fixtures
(the moved-out child has been dec'd elsewhere by the time
iter B fires; remaining ctors have no further pointer fields
to dec). General fix needs tag-switch in the dec emission —
separate iter.
- Closure-typed Own params still go through field_drop_call's
Type::Fn arm (shallow dec), same path 18c.4 carved out.
- (drop-iterative) worklist allocator — Iter 18e.
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c96940ea96 |
Iter 18d.3: move-aware pattern bindings via codegen-side bookkeeping
Closes 18d.2's per-field-dec scope cut without mutating the source. Codegen Emitter gains a per-fn-body side table: moved_slots: BTreeMap<binder_name, BTreeSet<field_idx>> When lower_match destructures a pattern and binds a non-wildcard pointer-typed slot, codegen records (scrutinee_binder, slot_idx) in moved_slots — but does NOT mutate the source's slot. The source box stays untouched; the bookkeeping carries the move-out information through codegen. Two consumer sites: (1) Term::Let scope close. If moved_slots[binder] is non-empty, codegen inlines a per-field dec sequence: load each pointer- typed field whose index is NOT in moved_slots, dispatch through field_drop_call, then ailang_rc_dec on the outer cell. If moved_slots[binder] is empty (the common case for every shipping fixture today), the call to drop_<m>_<T>(ptr) is unchanged from 18c.4 — no IR shape regression. (2) lower_reuse_as_rc reuse arm. Per-field dec is now safe — the moved-out slots are skipped via moved_slots lookup; non-moved slots are dec'd via field_drop_call's null-guarded drop fns. Replaces the 18d.2 punt rationale block with the new invariant. drop_<m>_<T> itself is unchanged: it operates on a fully-owned pointer (the cascade has no notion of "partially moved"). The partial-move complexity is confined to top-level emission sites that have the static info. Why static tracking, not source-mutation: the previous attempt (null-out the source's slot at pattern-bind point) ran into two structural issues: (i) borrowed scrutinees must not be mutated — null-out violates 18a's borrow contract; (ii) Desugarer creates chains that re-scrutinise the same scrutinee across arms, and mutation in arm 1 makes arm 2's re-load see garbage. Static tracking sidesteps both: the source box stays bit-identical across the entire match. Tests: - new fixture examples/pat_extract_partial_drop — Pair(IntList, IntList) destructured (a, _) — exercises moved + wildcard pointer slots. - new e2e alloc_rc_partial_drop_skips_moved_keeps_wildcarded asserts stdout 6 under both gc and rc, plus IR shape: main's let-close inlines drop on the wildcarded slot but NOT on the moved slot. - updated reuse_as_demo_under_rc_uses_inplace_rewrite IR-shape assertion — the canonical fixture moves the only pointer slot, so the reuse arm should contain neither @drop_ nor @ailang_rc_dec for fields. Test deltas: e2e 56 -> 57 (+1). All other buckets unchanged. cargo test --workspace green. Known regression — narrow, deliberate, queued for 18d.4: The prior alloc_rc_borrow_only_recursive_list_drop fixture from 18c.4 had a pattern (Cons h t) where t was bound but never consumed downstream. Under 18c.4, drop_<m>_<IntList>(xs) at let-close cascaded through xs.tail and freed the entire 5-cell chain. Under 18d.3 with strategy (b), xs.tail is in moved_slots, so the cascade is interrupted there — but t is never consumed, so its 4-cell tail now leaks. The fixture stdout is unchanged (still "11"), but memory hygiene under --alloc=rc is strictly worse. The fix is symmetric to 18c.4's known fn-parameter-dec debt: pattern-bound binders whose consume_count is 0 at arm close should also get a drop call emitted. Same emission seam as let-close-drop. Queued as 18d.4. Until 18d.4 ships, fixtures with pattern-extracted unused pointer binders leak under --alloc=rc; this is documented and bounded (shipping fixtures beyond the test suite generally consume every binder they bind). |
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Brummel
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73545ab086 |
Iter 18d.2: codegen reuse-as in-place rewrite under --alloc=rc
Lowers Term::ReuseAs { source, body=Term::Ctor } under
--alloc=rc to a runtime refcount-1 dispatch. At the reuse-as
site:
%hdr_ptr = getelementptr i8, ptr %src, i64 -8
%refcnt = load i64, ptr %hdr_ptr
%is_one = icmp eq i64 %refcnt, 1
br i1 %is_one, label %reuse, label %fresh
The reuse arm overwrites the source's box in place: stores the
new tag at offset 0 and the new field values at offsets 8, 16,
... — no malloc, no outer drop. The fresh arm allocates a brand-
new box via ailang_rc_alloc, stores tag and fields, then shallow-
dec's the source. Both arms phi-join to the same `ptr` result.
Other allocators (gc, bump) keep 18d.1's identity behaviour
unchanged.
Static shape compatibility is enforced by a new pre-codegen
pass crates/ailang-check/src/reuse_shape.rs. It tracks the
path-resolved ctor of every let-bound and pattern-matched
binder, then checks each Term::ReuseAs site against the body's
ctor. Mismatches emit reuse-as-shape-mismatch with stable
ctx.reason sub-codes (field-count-mismatch, field-type-mismatch,
indeterminate-source-ctor, cross-module-body-ctor, ctor-not-in-
module) and a drop-the-wrapper SuggestedRewrite. Build fails on
mismatch — the structured diagnostic tells the author whether
to fix the shapes or remove the hint.
Field-cleanup design — deliberate scope cut:
The reuse arm does NOT dec the old pointer-typed field values
before overwriting them. Doing so on the canonical fixture
`(reuse-as xs (Cons (+h 1) (map_inc t)))` causes use-after-free:
the recursive map_inc(t) returns t's in-place-rewritten box, so
the "new tail" being stored is the same pointer as the "old
tail". A dec-old-then-store-new schedule would dec the box (to
zero, free), then store the freed pointer.
The root cause is upstream: 18c.4 doesn't yet null-out pattern-
moved field slots, so codegen can't statically distinguish
"old field still owned" from "already moved out". The chosen
trade-off: skip the field dec entirely; pattern-wildcarded
fields (rare in shipping fixtures) leak; pattern-moved fields
are the body's responsibility (consistent with the 18c.4 leak
baseline — Own params still leak today). 18d.2 ships zero
regression vs 18c.4, plus the perf win on the alloc + outer
cascade. Closing the leak is the move-aware-pattern story
queued for 18d.3 / 18e.
Tests:
- e2e reuse_as_demo_under_rc_uses_inplace_rewrite — runs
examples/reuse_as_demo.ail.json under --alloc=rc, asserts
stdout 9 and locks in the IR shape (icmp eq i64 ..., 1; the
reuse arm has no @ailang_rc_alloc call).
- workspace reuse_as_shape_mismatch_is_reported_on_cons_to_nil
— happy negative for the new diagnostic.
- 3 unit tests in reuse_shape::tests covering same-ctor-clean,
cons-to-nil-reject, and indeterminate-source-ctor-reject.
Test deltas: e2e 56, ailang-check unit 46 -> 49 (+3), workspace
9 -> 10 (+1). cargo test --workspace green. Hand-verified
--alloc=rc binary on reuse_as_demo: stdout 9, exit 0.
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Brummel
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74379b29e5 |
Iter 18d.1: Term::ReuseAs schema + linearity check
Schema floor for explicit reuse hints. Adds Term::ReuseAs
{ source: Box<Term>, body: Box<Term> } with serde tag "reuse-as",
form-A (reuse-as <source> <body>). Schema choice (wrapper, not
modifier-on-Ctor) and rationale recorded in DESIGN.md.
Codegen is identity under all --alloc strategies — lower body,
drop source on the floor. Iter 18d.2 will lower this as the
in-place rewrite under --alloc=rc.
User-facing diagnostics:
- typecheck reuse-as-non-allocating-body: body must be a
Term::Ctor or Term::Lam, the two AST shapes that allocate.
Other shapes (literal, var, app, ...) emit this with a
suggested_rewrite that drops the wrapper.
- linearity reuse-as-source-not-bare-var: source must be a
Term::Var referring to an in-scope binder. Anything else
(literal, nested expression) is rejected here. Suggested
rewrite drops the wrapper.
- linearity use-after-consume at a reuse-as site: source must
not have been consumed earlier in the body. Suggested rewrite
drops the wrapper.
- Visiting reuse-as marks source consumed for the rest of the
body, so a subsequent use of the same binder flags
use-after-consume against it.
Uniqueness inference treats source as Consume — the consume
shows up in the side table for the codegen consumer.
Tests:
- 4 surface parse-tests (round-trip, no-args, one-arg, full
parse_term/term_to_form_a round-trip).
- 1 typecheck unit test (non-allocating body).
- 2 linearity unit tests (non-var source, after-consume).
- 1 integration test (happy-path map_inc in all-explicit mode
is linearity-clean).
- 1 E2E test running the canonical map_inc-via-reuse-as fixture
under --alloc=gc, asserting stdout 9.
- New fixture examples/reuse_as_demo.{ailx,ail.json}.
Test deltas: E2E 55 -> 56, ailang-check unit 43 -> 46,
ailang-check workspace 8 -> 9, surface 14 -> 18. cargo test
--workspace green. No existing fixture's canonical JSON changed.
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Brummel
|
298dcaf0f7 |
Iter 18c.4: per-type drop fn + recursive dec cascade
Closes 18c.3's main scope cut. Codegen now emits a per-ADT and
per-closure drop function under --alloc=rc; the Term::Let
scope-close emission routes through these drops instead of
ailang_rc_dec directly, so a recursive ADT (List, Tree) under
--alloc=rc actually frees its tail cells when the outer binder
is dec'd.
Drop-symbol scheme:
- For every Def::Type T in module m: emit one
define void @drop_<m>_<T>(ptr %p) under --alloc=rc.
Body: null-guard, load tag, switch on tag, per-ctor arm dec's
every pointer-typed field via field_drop_call, then dec's the
outer cell and rets.
- For every escaping Term::Lam: emit drop_<m>_<lam>_env(ptr) for
the captured-free-vars block + drop_<m>_<lam>_pair(ptr) for the
{env, fn-ptr} closure pair. A new closure_drops side table on
Emitter keys closure-pair SSAs to their pair-drop symbol.
Decision (preempted in dispatch): always emit @drop_<m>_<T> for
every ADT, even ones with no boxed children. The body for
no-boxed-children ADTs is null-guard + dec + ret. Call sites are
uniform; future codegen changes that thread cleanup through the
drop seam (atomic dec under threading, etc.) have one canonical
entry per type.
field_drop_call dispatches on field type:
- Type::Con { name, .. } → drop_<owner>_<name> (recursion).
- Type::Str / Type::Fn / Type::Var → fall back to ailang_rc_dec.
These three fall-backs are 18d/18e/monomorphisation debt; they
are flagged in-source for grep.
Term::Let scope-close emission is the same as 18c.3 modulo the
target: Term::Ctor binders → drop_<owner>_<type>; Term::Lam
binders → the closure_drops-recorded pair-drop symbol. All
other emission gates from 18c.3 (consume_count == 0,
body-tail-not-binder, block-not-terminated, non-escape) are
unchanged.
Recursion is stack-recursive — drop_IntList's Cons arm calls
itself on the tail. For 18c.4's 5-element fixtures the depth is
safe; long lists are out of scope until 18e replaces the
recursive call with a worklist allocator. The recursive site is
commented for grep.
Tests:
- examples/rc_list_drop.ail.json — 5-element IntList summed via
sum_list (xs has consume_count == 1; codegen skips the let-
close drop call but the IR shape is locked in by the unit test
below).
- examples/rc_list_drop_borrow.ail.json — same 5-element IntList,
match-only consumption (consume_count == 0). Codegen emits
drop_<m>_IntList(xs) at scope close; the cascade runs over all
5 cells at runtime.
- crates/ail/tests/e2e.rs — alloc_rc_recursive_list_sum +
alloc_rc_borrow_only_recursive_list_drop. Both assert
--alloc=rc stdout matches --alloc=gc and the binaries exit
cleanly.
- crates/ailang-codegen/src/lib.rs — unit test asserting the IR
shape: define void @drop_rclist_IntList header, recursive
self-call inside, outer ailang_rc_dec at the tail; negative-
complement under --alloc=gc.
Tests: E2E 53 -> 55, codegen unit 11 -> 12. cargo test
--workspace green.
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Brummel
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307a3ea848 |
Iter 18c.3: uniqueness inference + non-recursive RC inc/dec
Ends the leak-everything era under --alloc=rc. Codegen now emits
ailang_rc_inc at every Term::Clone site and ailang_rc_dec at
end-of-scope of trackable RC-allocated let-binders. Default
--alloc=boehm path is byte-identical to before this iter.
Two parts:
(A) New module ailang-check::uniqueness — post-typecheck
dataflow producing UniquenessTable: BTreeMap<(def, binder),
UniquenessInfo>. consume_count is max-over-paths: at if/match
the walker saves state, walks each arm against the snapshot,
and merges by taking the per-binder max. Term::Clone is a
Borrow on its inner term — the explicit clone is the user's
signal that a fresh ref is being produced via inc.
(B) Codegen emission in ailang-codegen. Term::Clone emits inc
under --alloc=rc, gated on val_ty == "ptr" and
!val_ssa.starts_with('@') (top-level fn closure-pair globals
live in the LLVM data segment, not in runtime/rc.c's heap).
Term::Let emits dec at scope close iff the value is
rc_alloc'd (Term::Ctor / Term::Lam in escape set under
--alloc=rc), val_ty == "ptr", consume_count == 0 (no callee
or outer site already took ownership), body's tail SSA is
not the binder itself (caller-takes-ownership case), and the
block isn't already terminated.
Header declares of @ailang_rc_inc / @ailang_rc_dec are gated on
--alloc=rc so Boehm/Bump IR shape is unchanged.
Fixture examples/rc_box_drop.ail.json: single-cell Box(Int) ADT
where shallow free is sufficient (no boxed children). E2E test
alloc_rc_emits_dec_for_unique_let_bound_box runs it under both
gc and rc, asserts byte-identical stdout, clean exit, expected
output (42).
Scope cuts deferred to 18c.4: per-type drop fn / recursive dec
cascades for ADTs with boxed children (List, Tree still leak
their tails). Fn params have no dec emission yet (no static
"caller handed off ownership" signal under Implicit mode);
under explicit (own T) the signal exists but wiring is 18d.
Tests: E2E 52 -> 53, ailang-check unit 38 -> 43 (+5 uniqueness),
all other buckets unchanged. cargo test --workspace green.
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Brummel
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7dfc88a4f3 |
Iter 18c.1: Term::Clone schema (no inc emission yet)
Adds (clone X) as a new Term variant. Form-A:
(let p (expensive_fn x)
(do consume_a (clone p)) ; explicit RC inc — needs 18c.3
(do consume_b p))
Schema floor for the LLM-aware RC design (Decision 10): explicit
clone is the author-visible alternative to implicit sharing. In
18c.1 the variant is purely additive — typechecker treats it as
identity (same type as inner), codegen lowers it to the inner
term's IR with no extra calls. Iter 18c.3 will replace the
codegen identity-arm with a single call:
Term::Clone { value } =>
let v = self.lower_term(value, ...)?;
self.emit("call void @ailang_rc_inc(ptr {v})");
Ok(v)
Match-arm count: ~10 sites across 6 files, all mechanical
structural recursion through `value`. The codegen `lower_term`
arm carries an explicit comment marking the 18c.3 emission seam.
Hash invariant: `(clone X)` uses a new serde tag "clone" that no
pre-18c.1 fixture contains. Every existing fixture's canonical
JSON is bit-identical (git diff examples/ empty).
New fixture examples/clone_demo.{ailx,ail.json}:
(let x 42 (do io/print_int (clone x)))
Stdout 42 under both --alloc=gc and --alloc=rc.
Tail-position propagates through clone (verify_tail_positions
treats `(clone tail-call)` as itself a tail call), per the
identity-of-clone semantics in 18c.1.
Verified:
- cargo build --workspace clean
- cargo test --workspace green: 52 e2e (+1), 14 surface parse
(+2 for clone tests), all other buckets unchanged
- ail render round-trip exact
- clone_demo --alloc=gc → 42; --alloc=rc → 42
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Brummel
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1eed78c41e |
Iter 18b: RC runtime + --alloc=rc routing
Wires up reference-counting allocator end-to-end without any inc/dec emission. Programs run under --alloc=rc and produce correct stdout (validated against --alloc=gc); they leak every allocation, exactly like the pre-Boehm era. The point of 18b is to establish the runtime contract before 18c adds the inc/dec-emission codegen pass. runtime/rc.c — new file. 8-byte uint64 refcount header prepended to every payload; ailang_rc_alloc(size) returns a ptr to the payload (header at ptr-8). ailang_rc_inc / dec are declared but never called by codegen yet; they exist so 18c can wire codegen against a stable runtime ABI. dec frees on zero refcount but does NOT recursively dec child references — that's 18c's job once it has per-ctor type info. crates/ailang-codegen/src/lib.rs — AllocStrategy::Rc variant added; fn_name() returns "ailang_rc_alloc". Single-line extension because Iter 18a's bump path had already centralised the allocator-symbol decision on fn_name() for all four allocation sites. crates/ail/src/main.rs — --alloc=rc accepted by Build/Run; parse_alloc_strategy extended; locate_rc_runtime() helper mirrors locate_bump_runtime; new Rc arm in build_to compiles runtime/rc.c with clang -O2 -c and links the resulting .o into the final binary (no -lgc). E2E coverage: alloc_rc_produces_same_stdout_as_gc on list.ail.json (42), alloc_rc_matches_gc_on_std_list_demo for broader allocation-site coverage. Total e2e bundle: 51 tests (was 49). Hand-verified on: sum.ail.json --alloc=rc → 55 list.ail.json --alloc=rc → 42 borrow_own_demo.ail.json --alloc=rc → 3 then 6 std_list_demo.ail.json --alloc=rc → matches --alloc=gc cargo build/test --workspace green; git diff examples/ empty. |
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Brummel
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b9ca8894a5 |
Iter 18a: (borrow T) / (own T) mode annotations on fn signatures
Adds form-A surface (borrow T) / (own T) wrappers in fn-type
params and ret slots. Internally these are not new Type variants
but per-position metadata on Type::Fn:
Type::Fn { params, param_modes, ret, ret_mode, effects }
enum ParamMode { Implicit, Own, Borrow }
This keeps Type itself unchanged, so unification, occurs, apply,
and ~190 other Type match-arms in the typechecker need no new
branch. Fields use serde skip-if-default predicates so canonical
JSON hashes for every pre-18a fixture stay bit-identical (sum,
list, hof, closure, list_map, etc.: zero diff under git).
Iter 18a is purely additive: typechecker treats modes as
transparent (mode-compat check deferred to 18c), no codegen
change (--alloc=gc / Boehm path unchanged), no linearity
enforcement. The annotation info flows into the JSON side-table
that 18c will consume.
Equality of mode slices is length-tolerant: a vec![] (the form
written by mechanically-updated construction sites that elide
modes) compares equal to vec![Implicit; n]. This kept the patch
from being a 100-site mechanical migration through the
typechecker. 18c will choose: keep the slack, or normalise to
full-length on construction.
New fixture examples/borrow_own_demo.{ailx,ail.json} exercises
both modes. list_length declares (borrow (con List)); sum_list
declares (own (con List)). Stdout: 3 then 6.
Documentation: DESIGN.md schema-additions block clarified that
modes are Type::Fn metadata (not Type variants); migration plan
flag rename --memory=rc → --alloc=rc to match the existing CLI
flag.
Verification:
- cargo build --workspace green
- cargo test --workspace green (154 tests, +1 vs baseline 153)
- git diff examples/{sum,list,hof,closure,list_map,...}.ail.json: empty
- borrow_own_demo runtime stdout: "3\n6\n"
- canonical JSON contains "param_modes":["borrow"] and ["own"]
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Brummel
|
aee6e9d3bf |
Iter 17a: per-fn arena via alloca for non-escaping allocations
Adds a conservative escape analysis that flags Term::Ctor and
Term::Lam allocations as non-escaping when they are bound by a
let, never flow to a fn arg / ctor field / tail-return / lambda
capture, and remain inside the allocating fn's frame. Codegen
lowers flagged sites to LLVM `alloca` instead of `@GC_malloc`;
escaping sites continue to use Boehm.
- escape.rs (new): name-based taint propagation; let-only
candidates; tail-position / app-arg / ctor-field / lam-capture
all taint.
- codegen: three sites switched (lower_ctor, lam env, closure
pair). Save/restore non_escape across lambda thunk emit.
- examples/escape_local_demo.{ailx,ail.json}: focused fixture
exercising both branches (peek and recursive count).
- e2e + escape unit tests: 133 → 141 (+8).
Stop-gate: 17a closes the queue. Memory-management discussion
(GC scope) is the next user-driven step. Per-fn arena observations
appended to JOURNAL — including the headline finding that 0/270
shipped allocations are flagged non-escaping under this rule
(real AILang threads ctors directly between fns; build-locally /
consume-locally is not idiomatic).
All existing fixture stdouts and content hashes bit-identical;
IR snapshots unchanged.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Brummel
|
937782e36d |
Iter 16e: == polymorphic over Int / Bool / Str / Unit
Lifts the Int-only restriction on `==`. Declared type becomes
forall a. Fn(a, a) -> Bool; codegen monomorphises and dispatches:
Int → icmp eq i64
Bool → icmp eq i1
Str → call @strcmp + icmp eq i32 0
Unit → constant true (operands still emitted for side effects)
ADT / Fn / other → CodegenError::Internal
This unblocks 16c's build_eq for non-Int lit patterns. == joins
__unreachable__ as the second polymorphic builtin (same Forall
machinery).
- check/builtins.rs: == registered as Forall(a, Fn(a, a) -> Bool).
- codegen: lower_eq dispatch table; @strcmp declared in IR header
alongside @printf/@GC_malloc/@puts.
- examples/eq_demo.{ailx,ail.json}: covers all four supported
scalars including a Str-lit-pattern match.
- IR snapshots refreshed: only +declare i32 @strcmp(ptr, ptr) in
the header; every define body bit-identical.
- e2e + check + codegen tests: 124 → 133 (+9, of which +1 is the
e2e fixture and the rest exercise the new dispatch / typecheck
surface).
Other comparison ops (<, <=, >, >=, !=) remain Int-only — out of
scope for this iter.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Brummel
|
af35612c1d |
Iter 16d: chain-terminator via __unreachable__ builtin
Eliminates the Unit-typed chain default that 16c left in place.
Adds __unreachable__ : forall a. a — codegen lowers to LLVM
unreachable. The 16a/16c chain machinery now uses it as the
deepest fall-through, so exhaustive matches with non-Unit arms
no longer need a (case _ ...) workaround.
- check/builtins.rs: register __unreachable__ as Forall(a, a).
- codegen: Term::Var "__unreachable__" emits LLVM unreachable
and sets block_terminated; If/Match/fn-body gate downstream
work on that flag.
- desugar: chain default switched from Lit{Unit} to Var.
- examples/lit_pat: categorize_first's trailing _ arm removed.
Hash changes from c4faec3abc2ed388 to 644de0c0ec15fc17.
- examples/unreachable_demo: positive fixture using safe_div
with __unreachable__ in the impossible branch.
- e2e + desugar tests: 122 → 124 (+2).
Path-a from 16b.2 planning: real primitive over a desugar-time
exhaustiveness pre-check (which would need cross-module type
registry access from desugar).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Brummel
|
e5f9828a04 |
Iter 16b.7: nested LetRec mutual capture (params, not name)
Inner LetRec capturing outer LetRec's params now lifts cleanly via
the existing post-order traversal — outer's params are KnownType
in inner's outer-scope, so 16b.2's fast-path handles them. Inner
LetRec capturing outer's NAME remains rejected (closure-of-self
in body, deferred separately).
Plus hardening: lift.rs's deferred path tracks the outer LetRec
name in a parallel `enclosing_letrec_names` set so the symmetric
inner-captures-outer-name rejection fires there too — without it
a silent lift produced a runtime arity mismatch.
- examples/nested_let_rec.{ailx,ail.json}: outer counts down via
inner that captures the outer's threshold param.
- desugar.rs: clarified panic message for outer-name capture.
- lift.rs: enclosing_letrec_names tracking.
- e2e + desugar tests: 120 → 122 (+2).
End-of-16b series: feature-complete except for closure-of-self
in body and closure-with-polymorphism, both queued separately.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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