def f(): stream = StringStream(expression) _numberParser = NumberParser() _operatorParser = OperatorParser() number = _numberParser.parse(stream) operator = _operatorParser.parse(stream) number = _numberParser.parse(stream) if stream.has_chars(): return "Stream should now be empty"
def f():
stream = StringStream(expression)
_stack = ParserStack()
_logic = ParserStackInteractor(_stack)
_numberParser = NumberParser()
_operatorParser = OperatorParser()
_expressionParser = ExpressionParser(_logic, _numberParser,
_operatorParser)
result = _expressionParser.parse(stream)
if not result.evaluate() == expectedResult:
return "Result is: %s. \n object is: %s" % (str(
result.evaluate()), str(result))
def testStream():
stream = StringStream("1+1")
def f():
stream.peek()
stream.next()
stream.peek()
stream.next()
stream.peek()
stream.peek()
stream.peek()
stream.next()
stream.peek()
stream.peek()
if stream.has_chars():
return "Stream should be empty"
return utils.Test("Test that stream operators work", f)
def evaluate(expressionString):
stream = StringStream(expressionString)
return parse(stream).evaluate()