//// [genericCallWithObjectTypeArgsAndConstraints3.ts] // Generic call with constraints infering type parameter from object member properties class Base { x: string; } class Derived extends Base { y: string; } class Derived2 extends Base { z: string; } function f(a: { x: T; y: T }) { var r: T; return r; } var r1 = f({ x: new Derived(), y: new Derived2() }); // ok, both extend Base function f2(a: U) { var r: T; return r; } var r2 = f2({ x: new Derived(), y: new Derived2() }); // ok var r3 = f2({ x: new Derived(), y: new Derived2() }); // ok function f3(y: (a: T) => T, x: T) { return y(null); } // all ok - T gets fixed too early, but then defaults to Base and everything works out var r4 = f3(x => x, new Base()); var r5 = f3(x => x, new Derived()); var r6 = f3(x => x, null); //// [genericCallWithObjectTypeArgsAndConstraints3.js] var __extends = this.__extends || function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; function __() { this.constructor = d; } __.prototype = b.prototype; d.prototype = new __(); }; // Generic call with constraints infering type parameter from object member properties var Base = (function () { function Base() { } return Base; })(); var Derived = (function (_super) { __extends(Derived, _super); function Derived() { _super.apply(this, arguments); } return Derived; })(Base); var Derived2 = (function (_super) { __extends(Derived2, _super); function Derived2() { _super.apply(this, arguments); } return Derived2; })(Base); function f(a) { var r; return r; } var r1 = f({ x: new Derived(), y: new Derived2() }); // ok, both extend Base function f2(a) { var r; return r; } var r2 = f2({ x: new Derived(), y: new Derived2() }); // ok var r3 = f2({ x: new Derived(), y: new Derived2() }); // ok function f3(y, x) { return y(null); } // all ok - T gets fixed too early, but then defaults to Base and everything works out var r4 = f3(function (x) { return x; }, new Base()); var r5 = f3(function (x) { return x; }, new Derived()); var r6 = f3(function (x) { return x; }, null);