def __init__(self, output):

self.output = output

self._symbol = ''

def syntaxError(self, recognizer, offendingSymbol, line, column, msg, e):

self.output.write(msg)

self._symbol = offendingSymbol.text

stack = recognizer.getRuleInvocationStack()

stack.reverse()

print("rule stack: {}".format(str(stack)))

print("line {} : {} at {} : {}".format(str(line),

str(column),

str(offendingSymbol).replace(" ", u'\u23B5'),

msg.replace(" ", u'\u23B5')))

@property

def symbol(self):

return self._symbol

def output(self):

return self.output