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# Copyright 2022 MosaicML Examples authors
# SPDX-License-Identifier: Apache-2.0

from transformers.configuration_utils import PretrainedConfig


class BertConfig(PretrainedConfig):

    def __init__(

        self,

        alibi_starting_size: int = 512,

        attention_probs_dropout_prob: float = 0.0,

        **kwargs,

    ):
        """Configuration class for MosaicBert.



        Args:

            alibi_starting_size (int): Use `alibi_starting_size` to determine how large of an alibi tensor to

                create when initializing the model. You should be able to ignore this parameter in most cases.

                Defaults to 512.

            attention_probs_dropout_prob (float): By default, turn off attention dropout in Mosaic BERT

                (otherwise, Flash Attention will be off by default). Defaults to 0.0.

        """
        super().__init__(
            attention_probs_dropout_prob=attention_probs_dropout_prob, **kwargs)
        self.alibi_starting_size = alibi_starting_size