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-rw-r--r--src/seastar/include/seastar/util/concepts.hh34
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+/*
+ * This file is open source software, licensed to you under the terms
+ * of the Apache License, Version 2.0 (the "License"). See the NOTICE file
+ * distributed with this work for additional information regarding copyright
+ * ownership. You may not use this file except in compliance with the License.
+ *
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+/*
+ * Copyright (C) 2020 ScyllaDB
+ */
+#pragma once
+
+#if defined(__cpp_concepts) && __cpp_concepts >= 201907
+
+#define SEASTAR_CONCEPT(x...) x
+#define SEASTAR_NO_CONCEPT(x...)
+
+#else
+
+#define SEASTAR_CONCEPT(x...)
+#define SEASTAR_NO_CONCEPT(x...) x
+
+#endif
+