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37 * Declares gmx::RepeatingOptionSection and related classes.
39 * \author Teemu Murtola <teemu.murtola@gmail.com>
41 * \ingroup module_options
43 #ifndef GMX_OPTIONS_REPEATINGSECTION_H
44 #define GMX_OPTIONS_REPEATINGSECTION_H
49 #include "gromacs/options/ioptionscontainerwithsections.h"
51 #include "abstractsection.h"
52 #include "isectionstorage.h"
53 #include "valuestore.h"
59 class RepeatingOptionSectionHandle;
61 class RepeatingOptionSectionStorage;
64 * Declares an option section that creates a structure for each instance.
66 * \tparam T Structure that stores the values for an instance of the section.
68 * This class declares a section that can be specified multiple times, and
69 * creates an instance of `T` for each instance. Options within the section
70 * can store their values in the created structure.
73 * \ingroup module_options
76 class RepeatingOptionSection : public AbstractOptionSection
79 //! AbstractOptionSectionHandle corresponding to this option type.
80 typedef RepeatingOptionSectionHandle<T> HandleType;
82 //! Creates a section with the given name.
83 explicit RepeatingOptionSection(const char* name) :
84 AbstractOptionSection(name),
89 //! Specifies a vector to receive the section structures.
90 RepeatingOptionSection& storeVector(std::vector<T>* values)
97 std::unique_ptr<IOptionSectionStorage> createStorage() const override;
99 std::vector<T>* values_;
101 //! Allows accessing the properties when initializing the storage.
102 friend class RepeatingOptionSectionStorage<T>;
107 * Implements handling of the structures that stores per-section values.
109 * \ingroup module_options
112 class RepeatingOptionSectionStorage : public IOptionSectionStorage
115 //! Initializes the storage for given section properties.
116 explicit RepeatingOptionSectionStorage(const RepeatingOptionSection<T>& section) :
117 store_(new OptionValueStoreVector<T>(section.values_)),
122 void initStorage() override { defaultValues_ = currentData_; }
123 void startSection() override { resetSection(); }
124 void finishSection() override
126 store_->append(currentData_);
131 void resetSection() { currentData_ = defaultValues_; }
133 //! Final storage location for the section structures.
134 const std::unique_ptr<IOptionValueStore<T>> store_;
137 * Stores the values for the current in-process section.
139 * Options within the section store their values to this structure, and
140 * they are then copied to the final storage when the section finishes.
144 //! Allows binding option storage to the current section data structure.
145 friend class RepeatingOptionSectionHandle<T>;
149 std::unique_ptr<IOptionSectionStorage> RepeatingOptionSection<T>::createStorage() const
152 return std::make_unique<RepeatingOptionSectionStorage<T>>(*this);
156 * Allows adding options to an RepeatingOptionSection.
158 * An instance of this class is returned from
159 * IOptionsContainerWithSections::addSection(), and supports adding options and
160 * subsections to a section created with OptionSection.
164 struct SectionData { int value; }
165 // as class attribute
166 std::vector<SectionData> values;
168 void MyClass::initOptions(gmx::IOptionsContainerWithSections *options)
170 auto sec = options->addSection(gmx::RepeatingOptionSection<SectionData>("sec").storeVector(&values));
171 sec->addOption(gmx::IntegerOption("arg").store(&sec.bind().value));
176 * \ingroup module_options
179 class RepeatingOptionSectionHandle : public AbstractOptionSectionHandle
182 //! Wraps a given section storage object.
183 explicit RepeatingOptionSectionHandle(internal::OptionSectionImpl* section) :
184 AbstractOptionSectionHandle(section),
185 storage_(getStorage<RepeatingOptionSectionStorage<T>>(section))
190 * Supports storing option values within the per-section data structure.
192 * See class documentation for an example.
194 T& bind() { return storage_->currentData_; }
197 RepeatingOptionSectionStorage<T>* storage_;