microsoft / microsoft/TypeScript
Valid JS code reported by TS as illegal code: Keywords cannot contain escape characters
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Bug
Domain: Parser
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Description
Bug Report
🔎 Search Terms
\u{63}onstructor()
valid javascript code returns error
Keywords cannot contain escape characters
escape characters
🕗 Version & Regression Information
- This is the behavior in every version I tried.
⏯ Playground Link
Playground link with relevant code
💻 Code
class C {
\u{63}onstructor() {} // equivalent to: constructor() {}
}
🙁 Actual behavior
Errors in code
Keywords cannot contain escape characters.
🙂 Expected behavior
No errors as it is valid javascript code.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with the linked TypeScript Playground and the class example using \u{63}onstructor(), then compare it with the equivalent constructor() form. Investigate the compiler path that reports "Keywords cannot contain escape characters"; done means valid JavaScript produces no error while preserving the expected behavior for invalid escapes.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- javascript, typescript
- Domain
- compilers
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Clearly specified
- Newbie friendliness
- 45/100