Function get_update_function_1_moment

include/core/optimizer.h:242–253

 */
template<class Float, OptimizerType optimizer_type>
__host__ __device__ decltype(&Optimizer::momentum_update<Float>) get_update_function_1_moment() {
    switch (optimizer_type) {
        case kMomentum:
            return &Optimizer::momentum_update<Float>;
        case kAdaGrad:
            return &Optimizer::adagrad_update<Float>;
        case kRMSprop:
            return &Optimizer::rmsprop_update<Float>;
        default:
            return nullptr;
    }
}

/**
 * @brief Compile-time binding of 2-moment optimizers