//// [bestCommonTypeOfConditionalExpressions2.ts] // conditional expressions return the best common type of the branches plus contextual type (using the first candidate if multiple BCTs exist) // these are errors class Base { foo: string; } class Derived extends Base { bar: string; } class Derived2 extends Base { baz: string; } var base: Base; var derived: Derived; var derived2: Derived2; var r2 = true ? 1 : ''; var r9 = true ? derived : derived2; function foo(t: T, u: U) { return true ? t : u; } function foo2(t: T, u: U) { // Error for referencing own type parameter return true ? t : u; // Ok because BCT(T, U) = U } function foo3(t: T, u: U) { return true ? t : u; } //// [bestCommonTypeOfConditionalExpressions2.js] // conditional expressions return the best common type of the branches plus contextual type (using the first candidate if multiple BCTs exist) // these are errors var __extends = (this && 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 __(); }; 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); var base; var derived; var derived2; var r2 = true ? 1 : ''; var r9 = true ? derived : derived2; function foo(t, u) { return true ? t : u; } function foo2(t, u) { return true ? t : u; // Ok because BCT(T, U) = U } function foo3(t, u) { return true ? t : u; }