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class ReferenceChecker:
def __init__(self, table):
self.__errors = []
self.__check_references(table, [], [])
@property
def errors(self):
return self.__errors
def __check_references(self, table, known_types, unknown_types):
(local_known_types, local_unknown_types) = self.__split_known_unknown_types(table)
known_types += local_known_types
unknown_types += local_unknown_types
self.__identifier_seen(known_types, unknown_types)
if table['children']:
for child_scope in table['children']:
self.__check_references(child_scope, known_types, unknown_types)
@staticmethod
def __split_known_unknown_types(table):
known_types = [row['name'] for row in table['content'] if row['type']]
unknown_types = [(row['name'], row['line']) for row in table['content'] if not (row['type'])]
return known_types, unknown_types
def __identifier_seen(self, known_types, unknown_types):
for (identifier, line) in unknown_types:
if not (identifier in known_types):
self.__errors.append('Identifier \"{}\" at line {} is unknown'.format(identifier, line))
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