// @target: ES5 var x: { foo: string; } var y: { foo: string; bar: string; } class Base { protected a: typeof x; protected b(a: typeof x) { } protected get c() { return x; } protected set c(v: typeof x) { } protected d: (a: typeof x) => void ; protected static r: typeof x; protected static s(a: typeof x) { } protected static get t() { return x; } protected static set t(v: typeof x) { } protected static u: (a: typeof x) => void ; constructor(a: typeof x) { } } // Increase visibility of all protected members to public class Derived extends Base { a: typeof y; b(a: typeof y) { } get c() { return y; } set c(v: typeof y) { } d: (a: typeof y) => void; static r: typeof y; static s(a: typeof y) { } static get t() { return y; } static set t(a: typeof y) { } static u: (a: typeof y) => void; constructor(a: typeof y) { super(a); } } var d: Derived = new Derived(y); var r1 = d.a; var r2 = d.b(y); var r3 = d.c; var r3a = d.d; d.c = y; var r4 = Derived.r; var r5 = Derived.s(y); var r6 = Derived.t; var r6a = Derived.u; Derived.t = y; class Base2 { [i: string]: Object; [i: number]: typeof x; } class Derived2 extends Base2 { [i: string]: typeof x; [i: number]: typeof y; } var d2: Derived2; var r7 = d2['']; var r8 = d2[1];