(function() {
let f = this ? class g { } : class h { };
return [ typeof f, typeof h ];
})();
[...[...'...']].length
typeof (new (class F extends (String, Array) { })).substring
(function() {
if (false) {
let f = { g() => 1 };
}
return typeof f;
})()
let a = 12, b = 3;
[a, b] = [b, a];
let point = [1,3], segment = [point,[5,5]], triangle = [...segment,[1,8]];