// @target: es6
// @lib: es2015

declare var console: any;
const arr: {y(): number}[] = [];
for (let i = 0; i < 3; i++) {
    arr.push(class C {
        static x = i;
        static y = () => C.x * 2;
    });
}
arr.forEach(C => console.log(C.y()));