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feat(parser): add syntax errors for constructor declarations (#18220) ## Summary - Add TS1031 error for `declare` modifier on constructor: `declare constructor() {}` - Add TS1093 error for return type annotation on constructor: `constructor(): number {}` ## Test plan - Parser conformance tests updated - Negative Passed: 1498 → 1500 (+2 tests) 🤖 Generated with [Claude Code](https://claude.com/claude-code)

main

9 minutes ago

[autofix.ci] apply automated fixes

feat/parser-constructor-errors

35 minutes ago

feat(parser): add syntax errors for constructor declarations - Add TS1031 error for `declare` modifier on constructor - Add TS1093 error for return type annotation on constructor Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

feat/parser-constructor-errors

52 minutes ago

fix(formatter): only expand mapped types when newline immediately follows opening brace The previous logic expanded mapped types whenever there was any newline between `{` and the property name. But Prettier only expands when there's a newline immediately after `{`. For example: - `{ readonly\n [A in B]: T}` → single line (newline not immediately after `{`) - `{\n readonly [A in B]: T}` → multi-line (newline immediately after `{`) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

fix/formatter-mapped-type-break-mode

60 minutes ago

fix(formatter): relocate leading comments for single-element union/intersection types For type alias declarations like `type A = /*1*/ | C`, Prettier relocates the leading comment from before the `|`/`&` operator to after the identifier, producing `type A /*1*/ = C;` instead of `type A = /*1*/ C;`. This fix handles the comment relocation for single-element union and intersection types, but skips complex nested cases (parenthesized types or same-type nesting) which have different comment handling rules. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

fix/formatter-union-type-comments

1 hour ago

feat(parser): add syntax errors for constructor declarations - Add TS1031 error for `declare` modifier on constructor - Add TS1093 error for return type annotation on constructor Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

feat/parser-constructor-errors

1 hour ago

feat(oxfmt): Support oxfmtrc `overrides` config (#18068) Fixes #17585

main

1 hour ago

docs(linter): Cleanup docs for various rules for consistency. (#18214) Remove implied eslint directive comments, which are not supported, by removing the mention of eslint at the start of the comment. And then misc fixes alongside those.

main

1 hour ago

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fix(formatter): only expand mapped types when newline immediately follows opening brace

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fix(formatter): relocate leading comments for single-element union/intersection types

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chore(linter): Add message to diagnostics optimizations debug assert

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