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/*
 * This file is part of the GROMACS molecular simulation package.
 *
 * Copyright (c) 2016, by the GROMACS development team, led by
 * Mark Abraham, David van der Spoel, Berk Hess, and Erik Lindahl,
 * and including many others, as listed in the AUTHORS file in the
 * top-level source directory and at http://www.gromacs.org.
 *
 * GROMACS is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 2.1
 * of the License, or (at your option) any later version.
 *
 * GROMACS 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with GROMACS; if not, see
 * http://www.gnu.org/licenses, or write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA.
 *
 * If you want to redistribute modifications to GROMACS, please
 * consider that scientific software is very special. Version
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 * consider code for inclusion in the official distribution, but
 * derived work must not be called official GROMACS. Details are found
 * in the README & COPYING files - if they are missing, get the
 * official version at http://www.gromacs.org.
 *
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 * the research papers on the package. Check out http://www.gromacs.org.
 */
/*! \file
 * \brief
 * Declares gmx::IOptionsContainerWithSections.
 *
 * \author Teemu Murtola <teemu.murtola@gmail.com>
 * \inpublicapi
 * \ingroup module_options
 */
#ifndef GMX_OPTIONS_IOPTIONSCONTAINERWITHSECTIONS_H
#define GMX_OPTIONS_IOPTIONSCONTAINERWITHSECTIONS_H

#include "gromacs/options/ioptionscontainer.h"

namespace gmx
{

class AbstractOptionSection;
class AbstractOptionSectionHandle;

namespace internal
{
class OptionSectionImpl;
}

/*! \brief
 * Interface for adding input options with sections.
 *
 * This interface extends IOptionsContainer with an additional addSection()
 * method that supports creating a hierarchy of sections for the options.
 *
 * Header optionsection.h provides OptionSection.
 *
 * \inpublicapi
 * \ingroup module_options
 */
class IOptionsContainerWithSections : public IOptionsContainer
{
    public:
        /*! \brief
         * Adds a section to this collection.
         *
         * \tparam    SectionType Type of the section description object.
         * \param[in] section     Section description.
         * \returns   AbstractOptionSectionHandle object for the created option.
         * \throws    APIError if invalid option settings are provided.
         *
         * Options can be added to the section through the returned handle.
         *
         * \internal
         * \p SectionType::HandleType must specify a type that derives from
         * AbstractinOptionSectionHandle and has a suitable constructor.
         */
        template <class SectionType>
        typename SectionType::HandleType addSection(const SectionType &section)
        {
            internal::OptionSectionImpl *storage
                = addSectionImpl(static_cast<const AbstractOptionSection &>(section));
            return typename SectionType::HandleType(storage);
        }

    protected:
        // Disallow deletion through the interface.
        // (no need for the virtual, but some compilers warn otherwise)
        virtual ~IOptionsContainerWithSections();

        /*! \brief
         * Adds a section to this container.
         *
         * \param[in] section     Section description.
         * \returns   Pointer to the internal section representation object.
         */
        virtual internal::OptionSectionImpl *
        addSectionImpl(const AbstractOptionSection &section) = 0;

        GMX_DEFAULT_CONSTRUCTORS(IOptionsContainerWithSections);
};

} // namespace

#endif