48 lines
649 B
Plaintext
48 lines
649 B
Plaintext
=== tests/cases/compiler/covariance1.ts ===
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module M {
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>M : typeof M
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interface X { m1:number; }
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>X : X
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>m1 : number
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export class XX implements X { constructor(public m1:number) { } }
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>XX : XX
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>X : X
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>m1 : number
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interface Y { x:X; }
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>Y : Y
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>x : X
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>X : X
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export function f(y:Y) { }
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>f : (y: Y) => void
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>y : Y
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>Y : Y
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var a:X;
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>a : X
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>X : X
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f({x:a}); // ok
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>f({x:a}) : void
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>f : (y: Y) => void
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>{x:a} : { x: X; }
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>x : X
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>a : X
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var b:XX;
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>b : XX
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>XX : XX
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f({x:b}); // ok covariant subtype
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>f({x:b}) : void
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>f : (y: Y) => void
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>{x:b} : { x: XX; }
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>x : XX
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>b : XX
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}
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