load_module("reflection")
var fname = "INPUT"
var parser := ChaiScript_Parser()
var parse_success = parser.parse("3 + 4", fname.c_str())
var a := parser.ast()

assert_equal(eval(a), 7)

var childs := a.children.front().children
var node := childs[0]

node.text = "9"

assert_equal(eval(a), 13)