Seastar
High performance C++ framework for concurrent servers
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concepts.hh
1/*
2 * This file is open source software, licensed to you under the terms
3 * of the Apache License, Version 2.0 (the "License"). See the NOTICE file
4 * distributed with this work for additional information regarding copyright
5 * ownership. You may not use this file except in compliance with the License.
6 *
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing,
12 * software distributed under the License is distributed on an
13 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
14 * KIND, either express or implied. See the License for the
15 * specific language governing permissions and limitations
16 * under the License.
17 */
18/*
19 * Copyright (C) 2020 ScyllaDB
20 */
21#pragma once
22
23#include <concepts>
24
25#if defined(__cpp_concepts) && __cpp_concepts >= 201907 && \
26 defined(__cpp_lib_concepts) && __cpp_lib_concepts >= 201907
27 // good
28#else
29#error the language support and/or library support for concepts is missing
30#endif
31
32// provided for backward compatibility
33#define SEASTAR_CONCEPT(x...) x
34#define SEASTAR_NO_CONCEPT(x...)