Boost C++ Libraries

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This is the documentation for a snapshot of the master branch, built from commit 2b7c83edd2.

boost/unordered/detail/opt_storage.hpp

// Copyright (C) 2023 Christian Mazakas
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

#ifndef BOOST_UNORDERED_DETAIL_OPT_STORAGE_HPP
#define BOOST_UNORDERED_DETAIL_OPT_STORAGE_HPP

#include <boost/config.hpp>

#include <memory>

namespace boost {
  namespace unordered {
    namespace detail {
      template <class T> union opt_storage
      {
        BOOST_ATTRIBUTE_NO_UNIQUE_ADDRESS T t_;

        opt_storage() {}
        ~opt_storage() {}

        T* address() noexcept { return std::addressof(t_); }
        T const* address() const noexcept { return std::addressof(t_); }
      };
    } // namespace detail
  } // namespace unordered
} // namespace boost

#endif // BOOST_UNORDERED_DETAIL_OPT_STORAGE_HPP