37 lines
625 B
JavaScript
37 lines
625 B
JavaScript
//// [covariance1.ts]
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module M {
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interface X { m1:number; }
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export class XX implements X { constructor(public m1:number) { } }
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interface Y { x:X; }
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export function f(y:Y) { }
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var a:X;
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f({x:a}); // ok
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var b:XX;
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f({x:b}); // ok covariant subtype
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}
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//// [covariance1.js]
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var M;
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(function (M) {
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var XX = (function () {
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function XX(m1) {
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this.m1 = m1;
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}
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return XX;
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})();
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M.XX = XX;
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function f(y) { }
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M.f = f;
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var a;
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f({ x: a }); // ok
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var b;
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f({ x: b }); // ok covariant subtype
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})(M || (M = {}));
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