Changelog

microsoft/typescript-go · · 13 commits

API expansion, parser fixes, scanner speedups

Added completions API and broader language-service fixes, plus parser/emit correctness fixes and scanner performance work.

weswigham piotrtomiak mds-ant DanielRosenwasser iisaduan

Completions API lands in TS Go (piotrtomiak4a461b7)

Added getCompletionsAtPosition to the native preview API, along with CompletionInfo, CompletionEntry, CompletionOptions, and CompletionItemKind plumbing. The implementation now optionally includes symbol handles for symbol-based completions, which makes completion results usable for richer tooling and editor features.

Parser now repairs invalid JSDoc names instead of crashing or misparsing (weswighamf0113b7)

Non-identifier JSDoc names are now reparsed when possible, with invalid cases surfaced as Identifier expected errors. This tightens parsing around malformed typedefs/callbacks and avoids a class of crashes and bad AST/source-map mismatches.

CommonJS export duplication is deduped (weswigham45df665)

The declaration emitter now tracks witnessed CommonJS export names and avoids emitting the same export assignment multiple times. That fixes duplicated exports.foo = ... output and the downstream symbol/type noise it caused.

Declaration emit learns a new class-property path (weswigham6038f11)

Declaration transform now walks into class children to find this property assignments beyond the top level, and it can consult base declarations before deciding whether to emit them. This improves .d.ts generation for class properties and reduces incorrect renaming/emission in inheritance-heavy code.

Speculative parse-cache acquisition now releases the right file (79fe60a)

Program.UpdateProgram now returns the acquired SourceFile, letting project code release the exact speculative parse-cache entry when a rebuild happens. This fixes a subtle cache accounting bug that could leak refcounts or leave the cache in the wrong state after updates.

LSP accepts null initializationOptions (de1bb2e)

initialize.initializationOptions is now modeled as nullable, matching the LSP spec and accepting clients that send null. This makes startup more tolerant of loose or legacy clients.

Scanner and checker get performance wins (mds-antcd961a7, mds-ant3b59895)

The scanner hot path was optimized with ASCII fast paths and tighter token scanning, and the checker now defers an orderedSet map allocation until it grows beyond 16 elements. These are runtime improvements aimed at reducing overhead in common code paths.

Other misc changes

  • Auto-imports no longer offer non-identifiers (DanielRosenwasser42eb4d4)
  • JSDoc non-identifier reparsing test coverage and enum plumbing updates (weswighamf0113b7)
  • Added IndexInfo.declaration to the public API (piotrtomiaka58d885)
  • Extension localization support and packaging/workflow updates (iisaduan0a1ff41)
  • Build/import handling tweak for included tsconfig.json files (c7f7cb8)
  • Minor async downlevel renaming fix and related tests (f83eec5)
  • Nop logger helper and session null-logger fallback (79fe60a)
  • Small logging, CI, and test harness adjustments (de1bb2e)