microsoft / microsoft/TypeScript-TmLanguage
String Literal Param in Default Type Definition in Interface Function Causes Breakage
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- Dominant language
- TypeScript
- Stars
- 471
- Forks
- 149
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Description
Code
let var1;
interface MyInterface {
func<T = Lowercase<'StringLiteral'>>(): T;
}
let var2;
JavaScript and TypeScript Nightly version: 5.6.0-dev.20240623
Breakage continues for many other keywords at the same block level such as: let, const, export, for, while, interface etc. class itself seems to overcome the breakage.
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Research direction
Reproduce the interface snippet in VS Code with the TypeScript Nightly extension, then inspect the TypeScript TextMate grammar files in this repository. Check how the default type definition and nested string literal affect block-level keyword scopes. Done means the snippet and the listed keywords no longer cause syntax highlighting to break.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- typescript
- Domain
- tooling
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100