# Copyright (c) ONNX Project Contributors

# SPDX-License-Identifier: Apache-2.0
from __future__ import annotations

import numpy as np

from onnx.reference.op_run import OpRun


class Selu(OpRun):
    def _run(self, x, alpha=None, gamma=None):
        return ((np.where(x > 0, x, alpha * np.expm1(x)) * gamma).astype(x.dtype),)