==================
Simple Function
==================

function { "Hiya" }

---

(root
  (item
    (statement
      (expression
        (value
          (function
            (statement
              (expression
                (value
                  (string))))))))))

==================
Function Call
==================

(foobar "Hiya")

---

(root
  (item
    (statement
      (expression
        (function_call
          (identifier)
          (expression
            (value
              (string))))))))

==================
Complex Function
==================

function <message number> {
  (output message)
  (output number)
}

---

(root
  (item
    (statement
      (expression
        (value
          (function
            (identifier)
            (identifier)
            (statement
              (expression            
                (tool_call
                  (output
                    (expression
                      (identifier))))))
            (statement
              (expression
                (tool_call
                  (output
                    (expression
                      (identifier))))))))))))

==================
Complex Function Call
==================

(foobar
    "hi"
    42
    {
      x = 1
      y = 2
    }
)

---

(root
  (item
    (statement
      (expression
        (function_call
          (identifier)
          (expression
            (value
              (string)))
          (expression
            (value
              (integer)))
          (expression
            (value
              (map
                (identifier)
                (value
                  (integer))
                (identifier)
                (value
                  (integer))))))))))