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Changelog

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

v0.3.0 — 2025-05-25

Added

Mutating methods SetOK and SetErr on result types (Result[Shape, OK, Err]).

Changed

Breaking: BoolResult is now represented as a uint8 rather than a bool. This fixes an issue with TinyGo where bool values are treated distinctly from uint8. See #344 for more information.

Fixed

#344: the memory representation of option and result now use uint8 instead of bool for the discriminator. LLVM optimizes bool values into a single bit, which breaks WIT variants where the associated types share memory.

v0.2.2 — 2025-03-16

Fixed

Updated error handling to address a build issue in TinyGo.

v0.2.1 — 2025-03-16

Fixed

Fixed cyclical dependency on package encoding/json when package cm is used in TinyGo package syscall. Files that import encoding/json will have a _json.go suffix and can be excluded when this package is copied into std.

v0.2.0 — 2025-03-15

Added

Initial support for Component Model async types stream, future, and error-context.
Initial support for JSON serialization of WIT list, enum, and record types.
Added cm.CaseUnmarshaler helper for text and JSON unmarshaling of enum and variant types.

Changed

Breaking: package cm: removed bool from Discriminant type constraint. It was not used by code generation.

v0.1.0 — 2024-12-14

Initial version, extracted into module go.bytecodealliance.org/cm.