Microsoft/TypeScript
Ver no GitHubIncorrect emitted declaration for unique symbol re-assignment
Open
#62.305 aberto em 19 de ago. de 2025
BugDomain: Declaration EmitHelp Wanted
Métricas do repositório
- Stars
- (48.455 stars)
- Métricas de merge de PR
- (Mesclagem média 6d 17h) (9 fundiu PRs em 30d)
Description
🔎 Search Terms
"TS1332", "unique symbol readonly", "function readonly property"
🕗 Version & Regression Information
N/A.
⏯ Playground Link
💻 Code
const mySymbol = Symbol('Symbols.mySymbol');
const Symbols = {
mySymbol
} as const;
function myFunction() {}
myFunction.mySymbol = Symbols.mySymbol;
/*
SEE `.D.TS` TAB. THE ABOVE CODE PRODUCES:
declare namespace myFunction {
var mySymbol: unique symbol;
}
WHICH IS AN ERROR (TS1332: A variable whose type is a 'unique symbol' type must be const)
*/
export {myFunction}
🙁 Actual behavior
Compiler produces:
declare namespace myFunction {
var mySymbol: unique symbol;
}
🙂 Expected behavior
Should be:
declare namespace myFunction {
const mySymbol: unique symbol;
}
Additional information about the issue
Behaves differently when not in a module (remove export {myFunction} in the Playground)