shoney.arickathil
4f570a74e6
The type system now keeps its nullability promise: a `?T` value cannot be
used, stored, or dereferenced as a plain `T` without narrowing. The canonical
evidence probe (return b.v where v: ?Int, fn -> Int) that compiled clean for
months now fails with WO-E211.
- WO-E211 (un-narrowed use): arithmetic and </<=/>/>= operands, and/or
operands (?Bool), interpolation segments, for-iterables, and returns whose
declared type is not nullable.
- WO-E212 (boundary): nil or ?T stored into a non-nullable slot — annotated
let, assignment to a confidently-typed local (cenv, never the placeholder
env — a placeholder target must stay silent) or a resolvable class field.
- WO-E213 (deref): field/index access through a possibly-nil base.
- Narrowing (locals only — a field place can be re-assigned between check
and use, so chains bind to a local first): `if x != nil { }` narrows the
branch; a DIVERGING then-branch (`if x == nil { return }`) narrows after
the if; `x != nil and x.n > 3` narrows and/or right operands
(short-circuit); `while x != nil` narrows the body. The narrow is
un-applied when an else-less then-env leaks out un-diverged (the existing
env-leak convention must not leak the narrow).
- No false positives by construction: env/cenv types are declared or
confidently inferred; the placeholder fallbacks are plain scalars, never
?T. The whole golden suite passed untouched (540/0).
- Samples updated to the bind-then-narrow idiom (log-watcher config decode +
supervisor lock/next_fire, gc-cycle ring print) — 22 genuine unnarrowed-nil
sites; employee needed zero changes. All acceptances green.
- Corpus: compile-fail/{nullable-unnarrowed-use,nullable-nil-into-plain,
nullable-deref-unchecked} + run/nullable-narrowing (all four forms) — 83/0.
- Catalog: E211/E212/E213 move from "Reserved, not yet emitted" to the main
table; nullable-types-implementation.md status flipped to ENFORCED
(historical record kept); plan 8 Task 6 ticked (boxed scalar cells
superseded by WO_NIL_SCALAR); board updated.
Verified: woc-test 540/0 + test_diag 14/0; oop-e2e 83/0; oop-accept ALL MET;
log-watcher 7/0; employee 8/0; gc-cycle ring prints + reclaims.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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|---|---|---|
| .. | ||
| actor | ||
| compile-fail | ||
| db | ||
| gc | ||
| lang | ||
| run | ||
| sample-logwatcher | ||
| sys | ||
| trap | ||
| README.md | ||
tests/corpus/ — the conformance spine
Fixture kinds, exact-outcome matching (byte-equal stdout / exact WO-E### / exact trap code / exact gc step+freed counts):
| dir | kind | landed by plan |
|---|---|---|
run/ |
compiles + runs, expected stdout | 3 |
compile-fail/ |
must fail with expected WO-E### |
3–4 |
trap/ |
must trap with expected code | 3–4 |
gc/ |
cycle collection scenarios | 3 |
actor/ |
shard/spawn/send (ASan+TSan) | 4 |
db/ |
insert/select + crash/replay | 5 |
lang/ |
Haxe-parity adoptions | 8 |
sys/ |
fs/proc/net/time/json stdlib | 9 |
sample-logwatcher/ |
ported log-watcher fixtures | 10 |
Runner: scripts/oop-e2e.sh (plan 3, task 2 — includes the how-to-add-a-fixture doc pointer docs/plan/oop-vm/02-corpus.md).