This file is indexed.

/usr/include/caf/io/connection_handle.hpp is in libcaf-dev 0.13.2-3.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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/******************************************************************************
 *                       ____    _    _____                                   *
 *                      / ___|  / \  |  ___|    C++                           *
 *                     | |     / _ \ | |_       Actor                         *
 *                     | |___ / ___ \|  _|      Framework                     *
 *                      \____/_/   \_|_|                                      *
 *                                                                            *
 * Copyright (C) 2011 - 2015                                                  *
 * Dominik Charousset <dominik.charousset (at) haw-hamburg.de>                *
 *                                                                            *
 * Distributed under the terms and conditions of the BSD 3-Clause License or  *
 * (at your option) under the terms and conditions of the Boost Software      *
 * License 1.0. See accompanying files LICENSE and LICENSE_ALTERNATIVE.       *
 *                                                                            *
 * If you did not receive a copy of the license files, see                    *
 * http://opensource.org/licenses/BSD-3-Clause and                            *
 * http://www.boost.org/LICENSE_1_0.txt.                                      *
 ******************************************************************************/

#ifndef CAF_CONNECTION_HANDLE_HPP
#define CAF_CONNECTION_HANDLE_HPP

#include "caf/io/handle.hpp"

namespace caf {
namespace io {

/**
 * Generic handle type for identifying connections.
 */
class connection_handle : public handle<connection_handle> {
 public:
  friend class handle<connection_handle>;
  using super = handle<connection_handle>;

  constexpr connection_handle() {
    // nop
  }

 private:
  inline connection_handle(int64_t handle_id) : super{handle_id} {
    // nop
  }
};

} // namespace io
} // namespace caf

#endif // CAF_CONNECTION_HANDLE_HPP