text: // sol3
  
  // The MIT License (MIT)
  
  // Copyright (c) 2013-2020 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_POINTER_LIKE_HPP
  #define SOL_POINTER_LIKE_HPP
  
  #include <sol/base_traits.hpp>
  
  #include <utility>
  #include <type_traits>
  
  namespace sol {
  
  	namespace meta {
  		namespace meta_detail {
  			template <typename T>
  			using is_dereferenceable_test = decltype(*std::declval<T>());
  
  			template <typename T>
  			using is_explicitly_dereferenceable_test = decltype(std::declval<T>().operator*());
  		}
  
  		template <typename T>
  		using is_pointer_like = std::integral_constant<bool, !std::is_array_v<T> && (std::is_pointer_v<T> || is_detected_v<meta_detail::is_explicitly_dereferenceable_test, T>)>;
  
  		template <typename T>
  		constexpr inline bool is_pointer_like_v = is_pointer_like<T>::value;
  	} // namespace meta
  
  	namespace detail {
  
  		template <typename T>
  		auto unwrap(T&& item) -> decltype(std::forward<T>(item)) {
  			return std::forward<T>(item);
  		}
  
  		template <typename T>
  		T& unwrap(std::reference_wrapper<T> arg) {
  			return arg.get();
  		}
  
  		template <typename T>
  		inline decltype(auto) deref(T&& item) {
  			using Tu = meta::unqualified_t<T>;
  			if constexpr (meta::is_pointer_like_v<Tu>) {
  				return *std::forward<T>(item);
  			}
  			else {
  				return std::forward<T>(item);
  			}
  		}
  
  		template <typename T>
  		inline decltype(auto) deref_move_only(T&& item) {
  			using Tu = meta::unqualified_t<T>;
  			if constexpr (meta::is_pointer_like_v<Tu> && !std::is_pointer_v<Tu> && !std::is_copy_constructible_v<Tu>) {
  				return *std::forward<T>(item);
  			}
  			else {
  				return std::forward<T>(item);
  			}
  		}
  
  		template <typename T>
  		inline T* ptr(T& val) {
  			return std::addressof(val);
  		}
  
  		template <typename T>
  		inline T* ptr(std::reference_wrapper<T> val) {
  			return std::addressof(val.get());
  		}
  
  		template <typename T>
  		inline T* ptr(T* val) {
  			return val;
  		}
  	} // namespace detail
  } // namespace sol
  
  #endif // SOL_POINTER_LIKE_HPP
  