86 lines
2.9 KiB
TypeScript
86 lines
2.9 KiB
TypeScript
//// [callSignatureAssignabilityInInheritance4.ts]
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// checking subtype relations for function types as it relates to contextual signature instantiation
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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: <T>(x: T) => T[];
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a2: <T>(x: T) => string[];
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a3: <T>(x: T) => void;
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a4: <T,U>(x: T, y: U) => string;
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a5: <T,U>(x: (arg: T) => U) => T;
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a6: <T extends Base>(x: (arg: T) => Derived) => T;
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a11: <T>(x: { foo: T }, y: { foo: T; bar: T }) => Base;
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a15: <T>(x: { a: T; b: T }) => T[];
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a16: <T extends Base>(x: { a: T; b: T }) => T[];
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a17: {
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<T extends Derived>(x: (a: T) => T): T[];
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<T extends Base>(x: (a: T) => T): T[];
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};
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a18: {
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(x: {
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<T extends Derived>(a: T): T;
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<T extends Base>(a: T): T;
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}): any[];
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(x: {
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<T extends Derived2>(a: T): T;
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<T extends Base>(a: T): T;
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}): any[];
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};
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}
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// S's
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interface I extends A {
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// N's
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a: <T>(x: T) => T[]; // ok, instantiation of N is a subtype of M, T is number
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a2: <T>(x: T) => string[]; // ok
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a3: <T>(x: T) => T; // ok since Base returns void
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a4: <T, U>(x: T, y: U) => string; // ok, instantiation of N is a subtype of M, T is string, U is number
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a5: <T, U>(x: (arg: T) => U) => T; // ok, U is in a parameter position so inferences can be made
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a6: <T extends Base, U extends Derived>(x: (arg: T) => U) => T; // ok, same as a5 but with object type hierarchy
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a11: <T, U>(x: { foo: T }, y: { foo: U; bar: U }) => Base; // ok
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a15: <U, V>(x: { a: U; b: V; }) => U[]; // ok, T = U, T = V
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a16: <T>(x: { a: T; b: T }) => T[]; // ok, more general parameter type
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a17: <T>(x: (a: T) => T) => T[]; // ok
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a18: (x: <T>(a: T) => T) => any[]; // ok
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}
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//// [callSignatureAssignabilityInInheritance4.js]
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// checking subtype relations for function types as it relates to contextual signature instantiation
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var __extends = (this && this.__extends) || function (d, b) {
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for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
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function __() { this.constructor = d; }
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__.prototype = b.prototype;
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d.prototype = new __();
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};
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var Base = (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 = (function (_super) {
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__extends(Derived, _super);
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function Derived() {
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_super.apply(this, arguments);
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}
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return Derived;
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})(Base);
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var Derived2 = (function (_super) {
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__extends(Derived2, _super);
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function Derived2() {
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_super.apply(this, arguments);
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}
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return Derived2;
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})(Derived);
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var OtherDerived = (function (_super) {
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__extends(OtherDerived, _super);
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function OtherDerived() {
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_super.apply(this, arguments);
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}
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return OtherDerived;
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})(Base);
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