December 2023

Release Notes December 2023 (2023-12-06)

See TypeSpec Core release notes

Add validation of formats emitted by the @format decorator - emit a warning and do not emit formats that are not understood by autorest.
Support EmbeddingVector types from Azure.Core by emitting x-ms-embedding-vector extension.
Add support for representing unions of literals as fixed and open enumerations, using enum [] and x-ms-enum.
Support string interpolation through new StringTemplate types.

Add no-enum linting rule to discourage the use of enumerations in favor of unions, but do not add to the default ruleset.
Add model template and supporting decorator to implement EmbeddingVector types.
Add new helper getUnionAsEnum to try to convert a union of literals to a fixed or extensible enum.
Add additional fields to LroMetadata to support long-running operations with no logical response (void):
- finalResult: Model | "void": The intended result of the logical operation on successful completion.
- finalEnvelopeResult: Model | "void": The Http response body returned in the last request in the logical operation on successful completion.
- finalResultPath: string: The path to the final result in the final envelope result.

Add support for SubscriptionLifecycleNotification endpoint in generated RP code.

Generate names for anonymous models and unions
Support scope parameter for @client, @operationGroup, @convenientApi and @protocolApi decorators.
Support core decimal types.
Support unbranded client and operation group detection

Add generated endpoints for SubscriptionLifecycleNotification extension for subscription-based resources.
Generate versioning classes regardless the number of API versions defined in the spec.
Add CancellationToken parameter to generated controller methods for resource operations.
Allow enums as discriminator values for polymorphic classes.

Enable new features for SubscriptionLifecycleNotification, CancellationToken, and always generating versioning classes.
Use Operation templates instead of interface templates to define resource operations.

Fix inconsistent logicalPath in getLroMetadata results (#3725).
Fix incorrect final-state-via in getLroMetadata results for custom PUT operations (#3724).

There are breaking changes in the TypeSpec core libraries, see the release notes for details.