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"""
Objective-C runtime wrapper for use by LLDB Python formatters
Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
See https://llvm.org/LICENSE.txt for license information.
SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
"""
class AttributesDictionary:
def __init__(self, allow_reset=True):
# need to do it this way to prevent endless recursion
self.__dict__['_dictionary'] = {}
self.__dict__['_allow_reset'] = allow_reset
def __getattr__(self, name):
if not self._check_exists(name):
return None
value = self._dictionary[name]
return value
def _set_impl(self, name, value):
self._dictionary[name] = value
def _check_exists(self, name):
return name in self._dictionary
def __setattr__(self, name, value):
if self._allow_reset:
self._set_impl(name, value)
else:
self.set_if_necessary(name, value)
def set_if_necessary(self, name, value):
if not self._check_exists(name):
self._set_impl(name, value)
return True
return False
def __len__(self):
return len(self._dictionary)
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