def _check_states(self, states):
def valid_pair(state):
return (isinstance(state, (list, tuple)) and
len(state) == 2 and
for_all(lambda x: isinstance(x, str), state) and
state[-1] in ["inclusive", "exclusive"])
if not (isinstance(states, (tuple, list)) and for_all(valid_pair, states)):
raise SyntaxError(("'states' must be a tuple (list) of 2 element tuples"
" where each pair is of the form (state_name, state_mode)"
" (state_mode is either 'inclusive' or 'exclusive')"))
state_names = map(lambda (x, _): x, states)
if self._default_state_name() in state_names:
raise SyntaxError("%r is an implicit default state" % self._default_state_name())
if len(state_names) != len(set(state_names)):
raise SyntaxError("duplicate states defined")
def valid_pair(state):
return (isinstance(state, (list, tuple)) and
len(state) == 2 and
for_all(lambda x: isinstance(x, str), state) and
state[-1] in ["inclusive", "exclusive"])
def _check_token_names(self, names):
if not (isinstance(names, (tuple, list)) and for_all(lambda x: isinstance(x, str), names)):
raise SyntaxError("'tokens' must be a tuple (list) of strings")
if len(names) != len(set(names)):
raise SyntaxError("duplicate tokens defined")
