95 lines
4.4 KiB
TypeScript
95 lines
4.4 KiB
TypeScript
//// [constructSignatureAssignabilityInInheritance5.ts]
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// checking subtype relations for function types as it relates to contextual signature instantiation
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// same as subtypingWithConstructSignatures2 just with an extra level of indirection in the inheritance chain
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class Base { foo: string; }
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class Derived extends Base { bar: string; }
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class Derived2 extends Derived { baz: string; }
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class OtherDerived extends Base { bing: string; }
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interface A { // T
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// M's
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a: new (x: number) => number[];
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a2: new (x: number) => string[];
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a3: new (x: number) => void;
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a4: new (x: string, y: number) => string;
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a5: new (x: (arg: string) => number) => string;
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a6: new (x: (arg: Base) => Derived) => Base;
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a7: new (x: (arg: Base) => Derived) => (r: Base) => Derived;
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a8: new (x: (arg: Base) => Derived, y: (arg2: Base) => Derived) => (r: Base) => Derived;
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a9: new (x: (arg: Base) => Derived, y: (arg2: Base) => Derived) => (r: Base) => Derived;
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a10: new (...x: Derived[]) => Derived;
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a11: new (x: { foo: string }, y: { foo: string; bar: string }) => Base;
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a12: new (x: Array<Base>, y: Array<Derived2>) => Array<Derived>;
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a13: new (x: Array<Base>, y: Array<Derived>) => Array<Derived>;
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a14: new (x: { a: string; b: number }) => Object;
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}
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interface B extends A {
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a: new <T>(x: T) => T[];
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}
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// S's
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interface I extends B {
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// N's
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a: new <T>(x: T) => T[]; // ok, instantiation of N is a subtype of M, T is number
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a2: new <T>(x: T) => string[]; // ok
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a3: new <T>(x: T) => T; // ok since Base returns void
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a4: new <T, U>(x: T, y: U) => T; // ok, instantiation of N is a subtype of M, T is string, U is number
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a5: new <T, U>(x: (arg: T) => U) => T; // ok, U is in a parameter position so inferences can be made
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a6: new <T extends Base, U extends Derived>(x: (arg: T) => U) => T; // ok, same as a5 but with object type hierarchy
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a7: new <T extends Base, U extends Derived>(x: (arg: T) => U) => (r: T) => U; // ok
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a8: new <T extends Base, U extends Derived>(x: (arg: T) => U, y: (arg2: T) => U) => (r: T) => U; // ok
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a9: new <T extends Base, U extends Derived>(x: (arg: T) => U, y: (arg2: { foo: string; bing: number }) => U) => (r: T) => U; // ok, same as a8 with compatible object literal
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a10: new <T extends Derived>(...x: T[]) => T; // ok
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a11: new <T extends Base>(x: T, y: T) => T; // ok
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a12: new <T extends Array<Base>>(x: Array<Base>, y: T) => Array<Derived>; // ok, less specific parameter type
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a13: new <T extends Array<Derived>>(x: Array<Base>, y: T) => T; // ok, T = Array<Derived>, satisfies constraint, contextual signature instantiation succeeds
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a14: new <T, U>(x: { a: T; b: U }) => T; // ok
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}
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//// [constructSignatureAssignabilityInInheritance5.js]
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// checking subtype relations for function types as it relates to contextual signature instantiation
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// same as subtypingWithConstructSignatures2 just with an extra level of indirection in the inheritance chain
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var __extends = (this && this.__extends) || (function () {
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var extendStatics = function (d, b) {
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extendStatics = Object.setPrototypeOf ||
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({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
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function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
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return extendStatics(d, b);
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};
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return function (d, b) {
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if (typeof b !== "function" && b !== null)
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throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
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extendStatics(d, b);
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function __() { this.constructor = d; }
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d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
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};
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})();
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var Base = /** @class */ (function () {
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function Base() {
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}
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return Base;
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}());
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var Derived = /** @class */ (function (_super) {
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__extends(Derived, _super);
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function Derived() {
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return _super !== null && _super.apply(this, arguments) || this;
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}
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return Derived;
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}(Base));
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var Derived2 = /** @class */ (function (_super) {
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__extends(Derived2, _super);
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function Derived2() {
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return _super !== null && _super.apply(this, arguments) || this;
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}
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return Derived2;
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}(Derived));
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var OtherDerived = /** @class */ (function (_super) {
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__extends(OtherDerived, _super);
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function OtherDerived() {
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return _super !== null && _super.apply(this, arguments) || this;
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}
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return OtherDerived;
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}(Base));
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