Channel and fiber errors use Result not panic
Platform spec ADR
Channel and fiber errors use Result not panic
Spec standingStandard
- Concurrency package - Contracts and edge cases Send, Receive, Join, Cancel, and Hub normative contracts.
- Concurrency package - Decisions record (legacy index) Migration index pointing to per-decision ADR files under adr/—normative text lives in ADRs, not this page.
- Concurrency package - Design model Package layout, module map, and thin-wrapper rule for Fiber and Channel structs.
- Concurrency package - Examples Illustrative spawn, Channel, and Hub usage (informative).
0 revisions (git unavailable at build; counts may be empty)
No commits recorded for this path.
| Section id | Required | Found |
|---|---|---|
what-this-feature-specifies | yes | yes |
implementation-anchors | yes | yes |
Full tree: run pnpm verify:platform-spec-layout (writes src/generated/platform-spec-layout-report.json).
Context
Section titled “Context”Panics as control flow for expected failure modes break contracts and LSP stability.
Decision
Section titled “Decision”| Surface | Rule |
|---|---|
| Channel | Send / Receive → Result; TrySend / TryReceive → Option |
| Fiber | Join → `Result<T, FiberError>`; stack overflow → FiberError::StackOverflow at Join |
| Mutex | Lock → `Result<MutexGuard, MutexError>`; TryLock → Option (None = would block) |
Consequences
Section titled “Consequences”v1: Lock may return Cancelled when fiber cancelled—no .NET-style poison.
Verification anchors
Section titled “Verification anchors”Corelib API signatures; runtime integration tests.