7 lines
384 B
TypeScript
7 lines
384 B
TypeScript
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// @strict: true
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type Cb<T> = {noAlias: () => T}["noAlias"]; // `"noAlias"` here prevents an alias symbol from being made
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// which means the comparison will definitely be structural, rather than by variance
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declare const x: Cb<Cb<Cb<Cb<number>>>>; // one more layer of `Cb` adn we'd get a `true` from the deeply-nested symbol check
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declare let y: Cb<Cb<Cb<Cb<string>>>>;
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y = x;
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