def _setup_precedence_when_not_trivial(self):
self._set_end_first_group_in_components()
if self._end_current_group == len(self._components):
self._current_node = None
else:
self._current_node = to_node(
self._components[self._end_current_group])
def _set_next_end_group_and_node(self):
if isinstance(self._current_node, Operator):
self._end_current_group += 1
self._set_end_first_group_in_components(self._end_current_group)
if self._end_current_group < len(self._components):
self._current_node = to_node(
self._components[self._end_current_group])
def _setup_non_trivial_regex(self):
self._set_end_first_group_in_components()
next_node = to_node(self._components[self._end_current_group])
if isinstance(next_node, KleeneStar):
self.head = next_node
self.sons.append(
self._process_sub_regex(0, self._end_current_group))
else:
begin_second_group = self._end_current_group
if isinstance(next_node, Symbol):
self.head = Concatenation()
else:
self.head = next_node
begin_second_group += 1
self.sons.append(
self._process_sub_regex(0, self._end_current_group))
self.sons.append(self._process_sub_regex(begin_second_group,
len(self._components)))
def _setup_one_symbol_regex(self):
first_symbol = to_node(self._components[0])
self._check_is_valid_single_first_symbol(first_symbol)
self.head = first_symbol
def _setup_empty_regex(self):
self.head = to_node("")