microsoft / microsoft/TypeScript
enum should not be able to used with math operators
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Description
Bug Report
🔎 Search Terms
enum operator
🕗 Version & Regression Information
- I think it never worked
⏯ Playground Link
Playground link with relevant code
💻 Code
enum A {
A = 1
}
let a: A = A.A
a++
🙁 Actual behavior
no error
🙂 Expected behavior
type error
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 reproduce the enum increment example. Trace the type-checking path for postfix increment and compare it with enum handling in related operator checks. Done means the sample produces a type error, with regression coverage preserving the expected behavior.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- typescript
- Domain
- compilers
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Clearly specified
- Newbie friendliness
- 35/100