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37 * Declares gmx::Options.
39 * Together with basicoptions.h, this header forms the part of the public
40 * API that most classes will use to provide options.
42 * \author Teemu Murtola <teemu.murtola@gmail.com>
44 * \ingroup module_options
46 #ifndef GMX_OPTIONS_OPTIONS_H
47 #define GMX_OPTIONS_OPTIONS_H
51 #include "gromacs/options/ioptionscontainer.h"
52 #include "gromacs/utility/classhelpers.h"
58 class OptionsAssigner;
59 class OptionsIterator;
67 * Base class for option managers.
69 * This class is used as a marker for all classes that are used with
70 * Options::addManager(). It doesn't provide any methods, but only supports
71 * transporting these classes through the Options collection into the
72 * individual option implementation classes.
74 * The virtual destructor is present to make this class polymorphic, such that
75 * `dynamic_cast` can be used when retrieving a manager of a certain type for
76 * the individual options.
79 * \ingroup module_options
84 virtual ~IOptionManager();
88 * Collection of options.
90 * See \ref module_options for an overview of how the options work.
91 * The IOptionsContainer interface documents how to add options.
93 * In order to keep the public interface of this class simple, functionality
94 * to assign values to options is provided by a separate OptionsAssigner class.
95 * Similarly, functionality for looping over all options (e.g., for writing out
96 * help) is provided by OptionsIterator.
99 * \ingroup module_options
101 class Options : public IOptionsContainer
105 * Initializes the name and title of an option collection.
107 * \param[in] name Single-word name.
108 * \param[in] title Descriptive title.
110 * Copies the input strings.
112 Options(const char *name, const char *title);
115 //! Returns the short name of the option collection.
116 const std::string &name() const;
119 * Adds an option manager.
121 * \param manager Manager to add.
122 * \throws std::bad_alloc if out of memory.
124 * Option managers are used by some types of options that require
125 * interaction between different option instances (e.g., selection
126 * options), or need to support globally set properties (e.g., a global
127 * default file prefix). Option objects can retrieve the pointer to
128 * their manager when they are created, and the caller can alter the
129 * behavior of the options through the manager.
130 * See the individual managers for details.
132 * Caller is responsible for memory management of \p manager.
133 * The Options object (and its contained options) only stores a
134 * reference to the object.
136 * This method cannot be called after adding options or subsections.
138 void addManager(IOptionManager *manager);
141 * Adds an option collection as a subsection of this collection.
143 * \param[in] section Subsection to add.
145 * The name() field of \p section is used as the name of the
146 * subsection. If an attempt is made to add two different subsections
147 * with the same name, this function asserts.
149 * \p section should not have any options added at the point this
152 * Only a pointer to the provided object is stored. The caller is
153 * responsible that the object exists for the lifetime of the
155 * It is not possible to add the same Options object as a subsection to
156 * several different Options.
157 * If an attempt is made, the function asserts.
159 void addSubSection(Options *section);
162 * Creates a subgroup of options within the current options.
164 * To add options to the group, use the returned interface.
166 * Currently, this is only used to influence the order of options:
167 * all options in a group appear before options in a group added after
168 * it, no matter in which order the options are added to the groups.
169 * In the future, the groups could also be used to influence the help
172 IOptionsContainer &addGroup();
174 // From IOptionsContainer
175 virtual OptionInfo *addOption(const AbstractOption &settings);
176 using IOptionsContainer::addOption;
179 * Notifies the collection that all option values are assigned.
181 * \throws InvalidInputError if invalid user input is detected.
183 * This function should be called after no more option values are
184 * to be assigned. Values in storage variables are guaranteed to be
185 * available only after this call, although in most cases, they are
186 * available already during assignment.
188 * If invalid option values, e.g., missing required option, is detected
189 * at this point, this function throws. The thrown exception contains
190 * information on all errors detected during the call.
195 PrivateImplPointer<internal::OptionsImpl> impl_;
197 //! Needed for the implementation to access subsections.
198 friend class internal::OptionsImpl;
199 //! Needed to be able to extend the interface of this object.
200 friend class OptionsAssigner;
201 //! Needed to be able to extend the interface of this object.
202 friend class OptionsIterator;
203 //! Needed to be able to extend the interface of this object.
204 friend class OptionsModifyingIterator;