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-// The MIT License (MIT)
-
-// Copyright (c) 2013-2016 Rapptz, ThePhD and contributors
-
-// Permission is hereby granted, free of charge, to any person obtaining a copy of
-// this software and associated documentation files (the "Software"), to deal in
-// the Software without restriction, including without limitation the rights to
-// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-// the Software, and to permit persons to whom the Software is furnished to do so,
-// subject to the following conditions:
-
-// The above copyright notice and this permission notice shall be included in all
-// copies or substantial portions of the Software.
-
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
-// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
-// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-#ifndef SOL_OPTIONAL_HPP
-#define SOL_OPTIONAL_HPP
-
-#include "compatibility.hpp"
-#include "in_place.hpp"
-#if defined(SOL_USE_BOOST)
-#include <boost/optional.hpp>
-#else
-#include "optional_implementation.hpp"
-#endif // Boost vs. Better optional
-
-namespace sol {
-
-#if defined(SOL_USE_BOOST)
- template <typename T>
- using optional = boost::optional<T>;
- using nullopt_t = boost::none_t;
- const nullopt_t nullopt = boost::none;
-#endif // Boost vs. Better optional
-
-} // sol
-
-#endif // SOL_OPTIONAL_HPP