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Tighter parameter decorator checking with `--experimentalDecorators` Β· Issue #52435 Β· microsoft/TypeScript Β· GitHub
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Breaking ChangeWould introduce errors in existing codeWould introduce errors in existing codeWorking as IntendedThe behavior described is the intended behavior; this is not a bugThe behavior described is the intended behavior; this is not a bug
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// @experimentalDecorators: true
export declare const Inject:
(entity: Function, dataSource?: string) =>
(target: object, key: string | symbol, index?: number) => void;
export class Foo {}
export class C {
constructor(@Inject(Foo) x: any) { }
}
Previously: no error
In main
/5.0:
Unable to resolve signature of parameter decorator when called as an expression.
Argument of type 'undefined' is not assignable to parameter of type 'string | symbol'
zanminkian, pintarj, enzo-cora and ivanvpan
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Breaking ChangeWould introduce errors in existing codeWould introduce errors in existing codeWorking as IntendedThe behavior described is the intended behavior; this is not a bugThe behavior described is the intended behavior; this is not a bug
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