// a
/* a */
let a, b;
const c = [
  1, '', ``, "", /x/,
  true, false, null, undefined, void 0, void (0),
]

a = { a: 1 }
a = [...a]
a = { ...a }

a.b(a, b, ...c)[d].e().f

a = (a + a)

// sequence expression
a = (2, 3)

a = () => 1
a = () => { }
a = async () => 1
a = async () => { await 1 }
a = (a, { a: b }, c = 1, ...d) => { return }

a = a += a -= a + a - a * a / a & a | a && a || a
a = a === a !== a > a >= a < a <= a

a ? a : a

a++
a--
--a
++a;
+a;
-a;
!a;

a in b

const [d, e] = d
const { f, [g]: h } = d

// statements
if (true) { }
switch (1) {
  case 1: break
  default:
}
throw a()
do { } while (1)
while (1) { }
for (let a = 1; ;) { }