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

|| <str> { "Hiya" }

--------------------------------------------------------------------------------

(root
  (statement
    (expression
      (value
        (function
          (type)
          (block
            (statement
              (expression
                (value
                  (string))))))))))

================================================================================
Function Assignment
================================================================================

x = || <str> { "Hiya" }

--------------------------------------------------------------------------------

(root
  (statement
    (assignment
      (identifier)
      (assignment_operator)
      (statement
        (expression
          (value
            (function
              (type)
              (block
                (statement
                  (expression
                    (value
                      (string))))))))))))

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

(foobar "Hiya")

--------------------------------------------------------------------------------

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

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

|message <str> number <int>| {
  (output message)
  (output number)
}

--------------------------------------------------------------------------------

(root
  (statement
    (expression
      (value
        (function
          (identifier)
          (type)
          (identifier)
          (type)
          (block
            (statement
              (expression
                (function_call
                  (built_in_function
                    (expression
                      (identifier))))))
            (statement
              (expression
                (function_call
                  (built_in_function
                    (expression
                      (identifier))))))))))))

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

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

--------------------------------------------------------------------------------

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