58 lines
1.2 KiB
TypeScript
58 lines
1.2 KiB
TypeScript
interface Base<T, U> {
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x: T;
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y: U;
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}
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// Error, no Base constructor function
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class D0 extends Base<string, string> {
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}
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interface BaseConstructor {
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new (x: string, y: string): Base<string, string>;
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new <T>(x: T): Base<T, T>;
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new <T>(x: T, y: T): Base<T, T>;
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new <T, U>(x: T, y: U): Base<T, U>;
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}
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declare function getBase(): BaseConstructor;
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class D1 extends getBase() {
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constructor() {
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super("abc", "def");
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this.x = "x";
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this.y = "y";
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}
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}
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class D2 extends getBase() <number> {
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constructor() {
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super(10);
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super(10, 20);
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this.x = 1;
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this.y = 2;
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}
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}
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class D3 extends getBase() <string, number> {
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constructor() {
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super("abc", 42);
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this.x = "x";
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this.y = 2;
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}
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}
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// Error, no constructors with three type arguments
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class D4 extends getBase() <string, string, string> {
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}
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interface BadBaseConstructor {
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new (x: string): Base<string, string>;
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new (x: number): Base<number, number>;
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}
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declare function getBadBase(): BadBaseConstructor;
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// Error, constructor return types differ
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class D5 extends getBadBase() {
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}
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