Function get_update_function

include/core/optimizer.h:226–233

 */
template<class Float, OptimizerType optimizer_type>
__host__ __device__ decltype(&Optimizer::sgd_update<Float>) get_update_function() {
    switch (optimizer_type) {
        case kSGD:
            return &Optimizer::sgd_update<Float>;
        default:
            return nullptr;
    }
}

/**
 * @brief Compile-time binding of 1-moment optimizers