`extend` in generic function with parens split across lines breaks syntax highlighting
Nobody has claimed this yet.
Assessment
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Newbie friendliness
- 35/100
- Issue type
- Bug
- Clarity
- Mostly clear
- Activity status
- Stale
- Tech stack
- typescript, vscode
- Domain
- tooling
Research direction
Start by reproducing the provided TypeScript snippet in VS Code and inspect the grammar rules handling generic function type parameters, the multiline parenthesized parameter list, and the arrow body. The issue is done when return and the rest of the file receive correct syntax highlighting for this form, without breaking the existing case where the parameter list stays on one line.
Written by the indexing model from the issue text.
Description
JavaScript and TypeScript Nightly version:
Not using that extension, but here's my VSCode info:
Version: 1.97.2 (Universal)
Commit: e54c774e0add60467559eb0d1e229c6452cf8447
Date: 2025-02-12T23:20:35.343Z
Electron: 32.2.7
ElectronBuildId: 10982180
Chromium: 128.0.6613.186
Node.js: 20.18.1
V8: 12.8.374.38-electron.0
OS: Darwin arm64 24.3.0
Code
const echo = <T extends number>(a
) => {
return a;
};
produces:
Where return is colored incorrectly.
It works fine without the extend:
Notably, this breaks the highlighting for the rest of the file.
- Dominant language
- TypeScript
- Stars
- 471
- Forks
- 149
- PR merge metrics
- No merged PRs in 30d
Contributor guide
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First steps
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- Open a pull request that references the issue number.
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