1ce3a4e9e0
S0 of the ratified Fork C plan (zero-legacy name-resolution redesign, S0→S6).
Pure setup/documentation: NO production code change, NO behavior change.
Single-author output byte-identical to wt-stdlib-base by construction.
Deliverables under docs/fork-c/ (docs/, not current/, because current/ is
gitignored and the contract must be committed):
S0.1 — byte-baseline + commit-discipline: the committed examples/expected/*
snapshots are the single-author byte-identity reference; the zero-diff repro is
`zig build && zig build test && bash tests/run_examples.sh`. Resolver-target set
explicitly excluded + listed. Commit-classification rule: mirror | consumer-cutover | deletion.
S0.2 — E6b disposition + two-corpus partition: transitional E6b src NOT merged
(grep-clean: no resolveRegistrationSigTypeInSource / sig_registration_mode /
e6br_gate.test.zig on baseline). Harvested 0811–0829 trees + goldens (never the
src), empirically partitioned by running each through the base compiler vs the
E6b target:
- baseline-green (mirror-equivalence): 0795–0798 (merged) + 0823, 0828 — given
examples/expected/ markers, locked into the S0 baseline.
- resolver-target (known-wrong old behavior): 0811–0822, 0824–0827, 0829 + the
re-filed E6BR-5 nested-pattern regression — a listed xfail harness under
tests/resolver-target/ (manifest + TARGET goldens, NO active marker), flips
active+green at S3.9. 0811/0829 noted as old-selector-wrong on the E6b-unmerged
base; E6BR-5 subsumed by the whole-AST resolver, NOT an E6b attempt-6.
S0.3 — A–E6 reuse/delete ledger: every load-bearing A–E6 artifact mapped REUSED
(Fork C home) or DELETED/TRANSITIONAL (S3/S6 phase); E6c/d/e dropped, F/H/I/K
absorbed/superseded.
Gate over the baseline-green corpus: zig build + zig build test (LSP corpus sweep
574 files, no crash) + bash tests/run_examples.sh (540 passed, 0 failed) all exit 0.
28 lines
1.6 KiB
Plaintext
28 lines
1.6 KiB
Plaintext
// E6b — ambiguity guard for an ERROR-SET name in a CLOSURE-LITERAL return
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// annotation (`closure(() -> !IoErr { … })`). `main` flat-imports two modules
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// that each author a same-name `IoErr` and authors none itself, so the closure
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// literal's `-> !IoErr` channel is a genuine collision the source cannot
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// disambiguate. It must emit the LOUD "type 'IoErr' is ambiguous" diagnostic and
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// poison the channel — NEVER silently pick a global `findByName` last-wins author.
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//
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// NOTE on fail-before/pass-after: unlike the OWN-WINS sibling (0813), this
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// AMBIGUITY case does NOT fail-before on attempt-1's binary. The pre-lowering
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// closure-shape pass (`convergeClosureShapeSets` → `recordClosureShape`) resolves
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// every closure literal's return annotation through the source-aware
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// `resolveType` (`resolveTypeWithBindings`), which attempt-1 already routed
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// error-set authors through — so the ambiguity is detected there and reported
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// regardless of `lowerLambda`. (For a `-> !Named` set that pass bails early after
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// resolving, so the OWN-WINS membership in 0813 still flowed through the stateless
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// `lowerLambda` path that attempt-2 fixes.) This example is the standing GUARD
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// that the lambda `-> !Named` ambiguity stays reported across both source-aware
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// sites; 0813 is the one that exercises attempt-2's `lowerLambda` channel fix.
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#import "modules/std.sx";
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#import "0814-modules-same-name-error-set-lambda-ambiguous/a.sx";
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#import "0814-modules-same-name-error-set-lambda-ambiguous/b.sx";
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main :: () -> s32 {
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fail_io := closure(() -> !IoErr { return; });
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return 0;
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}
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