=====================================
for / enumerable
=====================================

for n <- [1, 2], do: n * 2

---

(source
  (call
    (identifier)
    (arguments
      (binary_operator
        (identifier)
        (list
          (integer)
          (integer)))
      (keywords
        (pair
          (keyword
            (atom_literal))
          (binary_operator
            (identifier)
            (integer)))))))

=====================================
for / enumerable / with options and block
=====================================

for line <- IO.stream(), into: IO.stream() do
  String.upcase(line)
end

---

(source
  (call
    (identifier)
    (arguments
      (binary_operator
        (identifier)
        (call
          (dot
            (alias)
            (identifier))
          (arguments)))
      (keywords
        (pair
          (keyword
            (atom_literal))
          (call
            (dot
              (alias)
              (identifier))
            (arguments)))))
    (do_block
      (call
        (dot
          (alias)
          (identifier))
        (arguments
          (identifier))))))

=====================================
for / binary
=====================================

for <<c <- " hello world ">>, c != ?\s, into: "", do: <<c>>

---

(source
  (call
    (identifier)
    (arguments
      (bitstring
        (binary_operator
          (identifier)
          (string
            (string_content))))
      (binary_operator
        (identifier)
        (char))
      (keywords
        (pair
          (keyword
            (atom_literal))
          (string))
        (pair
          (keyword
            (atom_literal))
          (bitstring
            (identifier)))))))

=====================================
for / reduce
=====================================

for x <- [1, 2, 1], reduce: %{} do
  acc -> Map.update(acc, x, 1, & &1 + 1)
end

---

(source
  (call
    (identifier)
    (arguments
      (binary_operator
        (identifier)
        (list
          (integer)
          (integer)
          (integer)))
      (keywords
        (pair
          (keyword
            (atom_literal))
          (map))))
    (do_block
      (stab_clause
        (arguments
          (identifier))
        (body
          (call
            (dot
              (alias)
              (identifier))
            (arguments
              (identifier)
              (identifier)
              (integer)
              (unary_operator
                (binary_operator
                  (unary_operator
                    (integer))
                  (integer))))))))))