# Copyright 2020 Huawei Technologies Co., Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ============================================================================

"""grad base functions"""

from .._register_for_op import Registry


bprop_getters = Registry()
bprops = Registry()


def get_bprop_fn(prim):
    """get bprop function by primitive obj or prim name for c++"""
    out = bprop_getters.get(prim, None)
    if out:
        return out(prim)
    return bprops.get(prim, None)
