type_pair.hpp
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type_pair.hpp
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	/************************************************************************//
	*
	* \file rosa/support/type_pair.hpp
	*
	* \author David Juhasz (david.juhasz@tuwien.ac.at)
	*
	* \date 2017
	*
	* \brief Facilities for types representing pairs of types.
	*
	* \note This implementation is based on the `type_pair` implementation of CAF.
	* \todo Check license.
	*
	******************************************************************************/

	#ifndef ROSA_SUPPORT_TYPE_PAIR_HPP
	#define ROSA_SUPPORT_TYPE_PAIR_HPP

	namespace rosa {

	/// A pair of types.
	///
	/// \tparam F the first type
	/// \tparam S the second type
	template <typename F, typename S>
	struct TypePair {
	using First = F; ///< The first type.
	using Second = S; ///< The second type.
	};

	/// Turns two types into a `rosa::TypePair`
	///
	/// Turning two types `F` and `S` into `rosa::TypePair<F, S>` is as simple as
	/// \code
	/// typename ToTypePair<F, S>::Type
	/// \endcode
	///
	/// \tparam F the fist type
	/// \tparam S the second type
	template <typename F, typename S>
	struct ToTypePair {
	using Type = TypePair<F, S>; ///< The `rosa::TypePair`.
	};

	} // End namespace rosa

	#endif // ROSA_SUPPORT_TYPE_PAIR_HPP