def main(args):
if DEBUG:
#test_parser()
#test_parser2()
test_parser3()
parser = Parser()
program = ASTProgram()
evaluator = Evaluator()
repl = Repl(parser=parser, program=program, evaluator=evaluator)
if args:
filename = open(args[0], "r")
source = filename.read()
repl.execute_file(source=source)
else:
repl.loop()
