70 lines
1.4 KiB
TypeScript
70 lines
1.4 KiB
TypeScript
//// [assignmentCompatWithNumericIndexer2.ts]
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// Derived type indexer must be subtype of base type indexer
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interface Base { foo: string; }
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interface Derived extends Base { bar: string; }
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interface Derived2 extends Derived { baz: string; }
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interface A {
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[x: number]: Base;
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}
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var a: A;
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var b: { [x: number]: Derived; }
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a = b;
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b = a; // error
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var b2: { [x: number]: Derived2; }
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a = b2;
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b2 = a; // error
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module Generics {
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interface A<T extends Base> {
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[x: number]: T;
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}
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interface B extends A<Base> {
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[x: number]: Derived; // ok
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}
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function foo<T extends Base>() {
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var a: A<T>;
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var b: { [x: number]: Derived; }
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a = b; // error
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b = a; // error
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var b2: { [x: number]: Derived2; }
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a = b2; // error
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b2 = a; // error
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var b3: { [x: number]: T; }
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a = b3; // ok
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b3 = a; // ok
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}
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}
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//// [assignmentCompatWithNumericIndexer2.js]
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// Derived type indexer must be subtype of base type indexer
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var a;
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var b;
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a = b;
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b = a; // error
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var b2;
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a = b2;
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b2 = a; // error
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var Generics;
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(function (Generics) {
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function foo() {
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var a;
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var b;
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a = b; // error
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b = a; // error
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var b2;
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a = b2; // error
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b2 = a; // error
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var b3;
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a = b3; // ok
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b3 = a; // ok
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}
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})(Generics || (Generics = {}));
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