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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;
62 * Base class for option managers.
64 * This class is used as a marker for all classes that are used with
65 * Options::addManager(). It doesn't provide any methods, but only supports
66 * transporting these classes through the Options collection into the
67 * individual option implementation classes.
69 * The virtual destructor is present to make this class polymorphic, such that
70 * `dynamic_cast` can be used when retrieving a manager of a certain type for
71 * the individual options.
74 * \ingroup module_options
79 virtual ~IOptionManager();
83 * Collection of options.
85 * See \ref module_options for an overview of how the options work.
86 * The IOptionsContainer interface documents how to add options.
88 * In order to keep the public interface of this class simple, functionality
89 * to assign values to options is provided by a separate OptionsAssigner class.
90 * Similarly, functionality for looping over all options (e.g., for writing out
91 * help) is provided by OptionsIterator.
94 * \ingroup module_options
96 class Options : public IOptionsContainer
100 * Initializes the name and title of an option collection.
102 * \param[in] name Single-word name.
103 * \param[in] title Descriptive title.
105 * Copies the input strings.
107 Options(const char *name, const char *title);
110 //! Returns the short name of the option collection.
111 const std::string &name() const;
114 * Adds an option manager.
116 * \param manager Manager to add.
117 * \throws std::bad_alloc if out of memory.
119 * Option managers are used by some types of options that require
120 * interaction between different option instances (e.g., selection
121 * options), or need to support globally set properties (e.g., a global
122 * default file prefix). Option objects can retrieve the pointer to
123 * their manager when they are created, and the caller can alter the
124 * behavior of the options through the manager.
125 * See the individual managers for details.
127 * Caller is responsible for memory management of \p manager.
128 * The Options object (and its contained options) only stores a
129 * reference to the object.
131 * This method cannot be called after adding options or subsections.
133 void addManager(IOptionManager *manager);
136 * Adds an option collection as a subsection of this collection.
138 * \param[in] section Subsection to add.
140 * The name() field of \p section is used as the name of the
141 * subsection. If an attempt is made to add two different subsections
142 * with the same name, this function asserts.
144 * \p section should not have any options added at the point this
147 * Only a pointer to the provided object is stored. The caller is
148 * responsible that the object exists for the lifetime of the
150 * It is not possible to add the same Options object as a subsection to
151 * several different Options.
152 * If an attempt is made, the function asserts.
154 void addSubSection(Options *section);
156 // From IOptionsContainer
157 virtual OptionInfo *addOption(const AbstractOption &settings);
158 using IOptionsContainer::addOption;
160 //! Returns true if option \p name is set.
161 bool isSet(const char *name) const;
163 * Notifies the collection that all option values are assigned.
165 * \throws InvalidInputError if invalid user input is detected.
167 * This function should be called after no more option values are
168 * to be assigned. Values in storage variables are guaranteed to be
169 * available only after this call, although in most cases, they are
170 * available already during assignment.
172 * If invalid option values, e.g., missing required option, is detected
173 * at this point, this function throws. The thrown exception contains
174 * information on all errors detected during the call.
181 PrivateImplPointer<Impl> impl_;
183 //! Needed to be able to extend the interface of this object.
184 friend class OptionsAssigner;
185 //! Needed to be able to extend the interface of this object.
186 friend class OptionsIterator;
187 //! Needed to be able to extend the interface of this object.
188 friend class OptionsModifyingIterator;