Microsoft/TypeScript
Voir sur GitHubMixed-in classes with functions returning 'this' have TS2526 error in DTS file
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#52 687 ouverte le 8 févr. 2023
BugDomain: Declaration EmitHelp Wanted
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Description
Bug Report
🔎 Search Terms
TS2526 mixin declaration this
🕗 Version & Regression Information
- This is the behavior in every version I tried
⏯ Playground Link
💻 Code
class Sprite {
name = "";
constructor(name: string) {
this.name = name;
}
}
type Constructor = new (...args: any[]) => {};
function Scale<TBase extends Constructor>(Base: TBase) {
return class Scaling extends Base {
_scale = 1;
setScale(scale: number): this {
this._scale = scale;
return this;
}
};
}
export const A = Scale(Sprite);
DTS:
declare class Sprite {
name: string;
constructor(name: string);
}
export declare const A: {
new (...args: any[]): {
_scale: number;
// A 'this' type is available only in a non-static member of a class or interface.ts(2526)
setScale(scale: number): this;
};
} & typeof Sprite;
export {};
🙁 Actual behavior
TS2526 error appears in emitted dts file
🙂 Expected behavior
No error (TS files that have no errors should not emit DTS file with errors)