Method is_valid

Source/Falcor/Utils/Scripting/ndarray.h:428–428

    size_t shape(size_t i) const { return m_dltensor.shape[i]; }
    int64_t stride(size_t i) const { return m_dltensor.strides[i]; }
    bool is_valid() const { return m_handle != nullptr; }
    int32_t device_type() const { return m_dltensor.device.device_type; }
    int32_t device_id() const { return m_dltensor.device.device_id; }
    detail::ndarray_handle* handle() const { return m_handle; }