20 lines
652 B
JavaScript
20 lines
652 B
JavaScript
//// [contextualSignatureInstatiationCovariance.ts]
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interface Animal { x }
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interface TallThing { x2 }
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interface Giraffe extends Animal, TallThing { y }
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var f2: <T extends Giraffe>(x: T, y: T) => void;
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var g2: (a: Animal, t: TallThing) => void;
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g2 = f2; // While neither Animal nor TallThing satisfy the constraint, T is at worst a Giraffe and compatible with both via covariance.
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var h2: (a1: Animal, a2: Animal) => void;
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h2 = f2; // Animal does not satisfy the constraint, but T is at worst a Giraffe and compatible with Animal via covariance.
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//// [contextualSignatureInstatiationCovariance.js]
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var f2;
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var g2;
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g2 = f2;
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var h2;
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h2 = f2;
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