==========================================
parses ternary expressions
==========================================
print(isDone() ? stuff : otherStuff);
---
(program (expression_statement
    (function_call
        (identifier)
        (ternary (function_call (identifier)) (identifier) (identifier)))))

==========================================
parses mathematical operators
==========================================
-a + b * c - d / +e
---
(program (expression_statement
    (math_op
        (math_op (identifier))
        (math_op
            (math_op (identifier) (identifier))
            (math_op (identifier) (math_op (identifier)))))))

==========================================
parses boolean operators
=========================================
!a || !(b && c)
---
(program (expression_statement
    (bool_op
        (bool_op (identifier))
        (bool_op
            (expression (bool_op (identifier) (identifier)))))))

===========================================
parses the type operators
===========================================
print((x instanceof Array) || (typeof x == "string"))
---
(program (expression_statement (function_call (identifier)
    (bool_op
        (expression (instanceof_expression (identifier) (identifier)))
        (expression (typeof_expression (bool_op (identifier) (string))))))))

============================================
parses the 'in' operator
===========================================
print(x in y)
---
(program (expression_statement (function_call (identifier) (in_expression (identifier) (identifier)))))