src/gromacs/options/abstractsection.h

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  35 /*! \file
  36  * \brief
  37  * Declares base classes for declaring option sections.
  38  *
  39  * This header defines base classes for option section settings that are used
  40  * with IOptionsContainerWithSections::addSection().  These classes implement
  41  * the "named parameter" idiom for specifying section properties.
  42  *
  43  * \author Teemu Murtola <teemu.murtola@gmail.com>
  44  * \ingroup module_options
  45  */
  46 #ifndef GMX_OPTIONS_ABSTRACTSECTION_H
  47 #define GMX_OPTIONS_ABSTRACTSECTION_H
  48
  49 #include "gromacs/options/ioptionscontainerwithsections.h"
  50 #include "gromacs/utility/classhelpers.h"
  51 #include "gromacs/utility/gmxassert.h"
  52
  53 #include "isectionstorage.h"
  54
  55 namespace gmx
  56 {
  57
  58 class IOptionSectionStorage;
  59
  60 namespace internal
  61 {
  62 class OptionSectionImpl;
  63 }
  64
  65 /*! \brief
  66  * Base class for specifying option section properties.
  67  *
  68  * \ingroup module_options
  69  */
  70 class AbstractOptionSection
  71 {
  72 protected:
  73     //! \cond libapi
  74     //! Initializes option properties with the given name.
  75     explicit AbstractOptionSection(const char* name) : name_(name) {}
  76     virtual ~AbstractOptionSection() {}
  77     /*! \brief
  78      * Creates a storage object corresponding to this section.
  79      *
  80      * Similar to AbstractOption::createStorage().
  81      */
  82     virtual std::unique_ptr<IOptionSectionStorage> createStorage() const = 0;
  83     //! \endcond
  84
  85 private:
  86     const char* name_;
  87
  88     friend class internal::OptionSectionImpl;
  89 };
  90
  91 /*! \brief
  92  * Base class for handles to option sections.
  93  *
  94  * This class implements the common functionality for adding options and
  95  * subsections to option sections.
  96  *
  97  * \ingroup module_options
  98  */
  99 class AbstractOptionSectionHandle : public IOptionsContainerWithSections
 100 {
 101 public:
 102     // From IOptionsContainer
 103     //! \copydoc IOptionsContainer::addGroup()
 104     IOptionsContainer& addGroup() override;
 105
 106 protected:
 107     //! \cond libapi
 108     /*! \brief
 109      * Returns the storage for a particular type of section.
 110      *
 111      * This is intended for use in derived class constructors, where the
 112      * handle needs access to the actual storage.  The handle should know
 113      * the type of storage created for the section type it deals with, so
 114      * the cast should always be successful.
 115      */
 116     template<typename StorageType>
 117     static StorageType* getStorage(internal::OptionSectionImpl* section)
 118     {
 119         IOptionSectionStorage* storage      = getStorage(section);
 120         StorageType*           typedStorage = dynamic_cast<StorageType*>(storage);
 121         GMX_ASSERT(typedStorage != nullptr, "Mismatching section storage type");
 122         return typedStorage;
 123     }
 124
 125     //! Wraps a given section storage object.
 126     explicit AbstractOptionSectionHandle(internal::OptionSectionImpl* section) : section_(section)
 127     {
 128     }
 129     //! \endcond
 130
 131 private:
 132     // From IOptionsContainerWithSections
 133     internal::OptionSectionImpl* addSectionImpl(const AbstractOptionSection& section) override;
 134     // From IOptionsContainer
 135     OptionInfo* addOptionImpl(const AbstractOption& settings) override;
 136
 137     /*! \brief
 138      * Implementation helper for the template method.
 139      *
 140      * This allows encapsulating the implementation within the source file.
 141      */
 142     static IOptionSectionStorage* getStorage(internal::OptionSectionImpl* section);
 143
 144     internal::OptionSectionImpl* section_;
 145 };
 146
 147 class AbstractOptionSectionInfo
 148 {
 149 public:
 150     //! Wraps a given section storage object.
 151     explicit AbstractOptionSectionInfo(internal::OptionSectionImpl* section) : section_(*section) {}
 152
 153     //! Returns the name of the section.
 154     const std::string& name() const;
 155
 156     //! Returns the wrapped section storage object.
 157     internal::OptionSectionImpl& section() { return section_; }
 158     //! Returns the wrapped section storage object.
 159     const internal::OptionSectionImpl& section() const { return section_; }
 160
 161 private:
 162     internal::OptionSectionImpl& section_;
 163
 164     GMX_DISALLOW_COPY_AND_ASSIGN(AbstractOptionSectionInfo);
 165 };
 166
 167 } // namespace gmx
 168
 169 #endif