========================
regexes
========================

/a+/

---

(expression (regex))

========================
conditionals
========================

(if (1) /a+/)

---

(expression (parenthesized (expression (conditional
  (parenthesized (expression (number)))
  (expression (regex))))))

========================
quotients
========================

((1) / 2)

---

(expression (parenthesized (expression (quotient
  (expression (parenthesized (expression (number))))
  (expression (number))))))
