unreachable.h

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); 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.
 */
 
#pragma once
 
#include <utility>
 
#include "iceberg/compat/compiler.h"
 
 
namespace iceberg {
 
[[noreturn]] inline void unreachable() noexcept {
#if !ICEBERG_CXX20_COMPAT
  std::unreachable();
#elif defined(_MSC_VER) && !defined(__clang__)
  __assume(false);
#else
  __builtin_unreachable();
#endif
}
 
}  // namespace iceberg