group.cuh

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// SPDX-License-Identifier: Apache-2.0
#pragma once
#include <cuda_runtime.h>
#include <concepts>
#include <type_traits>
 
template <typename Group>
concept Groupable = std::is_default_constructible_v<Group> && requires(Group lhs, Group rhs, int4 buf) {
  { lhs + rhs } -> std::same_as<Group>;
  { -lhs } -> std::same_as<Group>;
  { Group::From(buf) } -> std::same_as<Group>;
  { lhs.Into() } -> std::same_as<int4>;
};