# -------------------------------------------------------------------------
# Copyright (c) 2024 Huawei Technologies Co., Ltd.
# This file is part of the MindStudio project.
#
# MindStudio is licensed under Mulan PSL v2.
# You can use this software according to the terms and conditions of the Mulan PSL v2.
# You may obtain a copy of Mulan PSL v2 at:
#
#    http://license.coscl.org.cn/MulanPSL2
#
# THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
# EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
# MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
# See the Mulan PSL v2 for more details.
# -------------------------------------------------------------------------
class EmptyClass:

    def __init__(self: any, info: str = "") -> None:
        self._info = info

    @classmethod
    def __bool__(cls: any) -> bool:
        return False

    @classmethod
    def __str__(cls: any) -> str:
        return ""

    @property
    def info(self: any) -> str:
        return self._info

    @staticmethod
    def is_empty() -> bool:
        return True