def __init__(self, token):
assert isinstance(token, Token)
if token.token_type in self.token_map.keys():
self._operation_type = self.token_map[token.token_type]
else:
self._operation_type = OperationType.VARIABLE(token.value)
def transform(self, expression, pattern=None):
assert isinstance(expression, Operation)
if pattern is None:
assert isinstance(pattern, SubstitutionPattern)
for k in pattern.keys():
if type(pattern[k]) == str:
pattern[k] = Operation(OperationType.VARIABLE(pattern[k]))
substituted_start = self.try_transform(expression, pattern)
substituted_end = self._substitute(self._end, pattern)
return substituted_end