text: #ifndef SPROUT_ALGORITHM_FIXED_SET_UNION_HPP
  #define SPROUT_ALGORITHM_FIXED_SET_UNION_HPP
  
  #include <type_traits>
  #include <sprout/config.hpp>
  #include <sprout/container/traits.hpp>
  #include <sprout/container/functions.hpp>
  #include <sprout/iterator/operation.hpp>
  #include <sprout/algorithm/fixed/result_of.hpp>
  #include <sprout/detail/container_complate.hpp>
  #include HDR_FUNCTIONAL_SSCRISK_CEL_OR_SPROUT
  
  namespace sprout {
  	namespace fixed {
  		namespace detail {
  			template<typename InputIterator1, typename InputIterator2, typename Result, typename Compare, typename... Args>
  			inline SPROUT_CONSTEXPR typename std::enable_if<
  				sprout::container_traits<Result>::static_size == sizeof...(Args),
  				typename sprout::fixed::result_of::algorithm<Result>::type
  			>::type set_union_impl(
  				InputIterator1 first1,
  				InputIterator1 last1,
  				InputIterator2 first2,
  				InputIterator2 last2,
  				Result const& result,
  				Compare comp,
  				typename sprout::container_traits<Result>::size_type size,
  				Args const&... args
  				)
  			{
  				return sprout::remake<Result>(result, sprout::size(result), args...);
  			}
  			template<typename InputIterator1, typename InputIterator2, typename Result, typename Compare, typename... Args>
  			inline SPROUT_CONSTEXPR typename std::enable_if<
  				sprout::container_traits<Result>::static_size != sizeof...(Args),
  				typename sprout::fixed::result_of::algorithm<Result>::type
  			>::type set_union_impl(
  				InputIterator1 first1,
  				InputIterator1 last1,
  				InputIterator2 first2,
  				InputIterator2 last2,
  				Result const& result,
  				Compare comp,
  				typename sprout::container_traits<Result>::size_type size,
  				Args const&... args
  				)
  			{
  				return sizeof...(Args) < size
  					? first1 != last1
  						? first2 != last2
  							? comp(*first1, *first2)
  								? sprout::fixed::detail::set_union_impl(sprout::next(first1), last1, first2, last2, result, comp, size, args..., *first1)
  								: comp(*first2, *first1)
  									? sprout::fixed::detail::set_union_impl(first1, last1, sprout::next(first2), last2, result, comp, size, args..., *first2)
  									: sprout::fixed::detail::set_union_impl(sprout::next(first1), last1, sprout::next(first2), last2, result, comp, size, args..., *first1)
  							: sprout::fixed::detail::set_union_impl(sprout::next(first1), last1, first2, last2, result, comp, size, args..., *first1)
  						: first2 != last2
  							? sprout::fixed::detail::set_union_impl(first1, last1, sprout::next(first2), last2, result, comp, size, args..., *first2)
  						: sprout::detail::container_complate(result, args...)
  					: sprout::detail::container_complate(result, args...)
  					;
  			}
  		}	// namespace detail
  		//
  		// set_union
  		//
  		template<typename InputIterator1, typename InputIterator2, typename Result, typename Compare>
  		inline SPROUT_CONSTEXPR typename sprout::fixed::result_of::algorithm<Result>::type set_union(
  			InputIterator1 first1,
  			InputIterator1 last1,
  			InputIterator2 first2,
  			InputIterator2 last2,
  			Result const& result,
  			Compare comp
  			)
  		{
  			return sprout::fixed::detail::set_union_impl(
  				first1,
  				last1,
  				first2,
  				last2,
  				result,
  				comp,
  				sprout::size(result)
  				);
  		}
  		//
  		// set_union
  		//
  		template<typename InputIterator1, typename InputIterator2, typename Result>
  		inline SPROUT_CONSTEXPR typename sprout::fixed::result_of::algorithm<Result>::type set_union(
  			InputIterator1 first1,
  			InputIterator1 last1,
  			InputIterator2 first2,
  			InputIterator2 last2,
  			Result const& result
  			)
  		{
  			return sprout::fixed::detail::set_union_impl(
  				first1,
  				last1,
  				first2,
  				last2,
  				result,
  				NS_SSCRISK_CEL_OR_SPROUT::less<typename sprout::container_traits<Result>::value_type>(),
  				sprout::size(result)
  				);
  		}
  	}	// namespace fixed
  
  	using sprout::fixed::set_union;
  }	// namespace sprout
  
  #endif	// #ifndef SPROUT_ALGORITHM_FIXED_SET_UNION_HPP
  