blob: 810e50bf3721bcbb4ac050f1b1a42a6f78c4991b (
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class TokenIterator(object):
def __init__(self, tokens):
self._tokens = tokens
self._index = 0
def next_value(self, token_type):
return self._next(token_type).value
def _next(self, token_type):
token = self._tokens[self._index]
if token.type == token_type:
self._index += 1
return token
else:
raise self._unexpected_token_type(token_type, token)
def skip(self, token_type, token_value):
token = self._tokens[self._index]
if token.type == token_type and token.value == token_value:
self._index += 1
return True
else:
raise self._unexpected_token_type(token_type, token)
def try_skip(self, token_type, token_value):
token = self._tokens[self._index]
if token.type == token_type and token.value == token_value:
self._index += 1
return True
else:
return False
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