function.py 文件源码

def forward(self, inputs):
        """Applies forward propagation to input arrays.

        It delegates the procedure to :meth:`forward_cpu` or
        :meth:`forward_gpu` by default. Which it selects is determined by the
        type of input arrays.
        Implementations of :class:`Function` must implement either CPU/GPU
        methods or this method.

        Args:
            inputs: Tuple of input array(s).

        Returns:
            Tuple of output array(s).

        .. warning::

            Implementations of :class:`Function` must take care that the
            return value must be a tuple even if it returns only one array.

        """
        if any(isinstance(x, cuda.ndarray) for x in inputs):
            return self.forward_gpu(inputs)
        else:
            return self.forward_cpu(inputs)