field_helpers.hh
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	/**
	* file field_helpers.hh
	*
	* @author Till Junge <till.junge@epfl.ch>
	*
	* @date 30 Aug 2018
	*
	* @brief helper functions that needed to be sequestered to avoid circular
	* inclusions
	*
	* Copyright © 2018 Till Junge
	*
	* µSpectre is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License as
	* published by the Free Software Foundation, either version 3, or (at
	* your option) any later version.
	*
	* µSpectre is distributed in the hope that it will be useful, but
	* WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with µSpectre; see the file COPYING. If not, write to the
	* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	* Boston, MA 02111-1307, USA.
	*/

	#ifndef FIELD_HELPERS_H
	#define FIELD_HELPERS_H

	#include <memory>

	namespace muSpectre {

	/**
	* Factory function, guarantees that only fields get created that
	* are properly registered and linked to a collection.
	*/
	template <class FieldType, class FieldCollection, typename... Args>
	inline FieldType &
	make_field(std::string unique_name,
	FieldCollection & collection,
	Args&&... args) {
	std::unique_ptr<FieldType> ptr{
	new FieldType(unique_name, collection, args...)};
	auto& retref{*ptr};
	collection.register_field(std::move(ptr));
	return retref;
	}



	} // muSpectre

	#endif /* FIELD_HELPERS_H */