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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;
68 * Collection of options.
70 * See \ref module_options for an overview of how the options work.
71 * The IOptionsContainer interface documents how to add options.
73 * In order to keep the public interface of this class simple, functionality
74 * to assign values to options is provided by a separate OptionsAssigner class.
75 * Similarly, functionality for looping over all options (e.g., for writing out
76 * help) is provided by OptionsIterator.
79 * \ingroup module_options
81 class Options : public IOptionsContainer
85 * Initializes the name and title of an option collection.
87 * \param[in] name Single-word name.
88 * \param[in] title Descriptive title.
90 * Copies the input strings.
92 Options(const char *name, const char *title);
95 //! Returns the short name of the option collection.
96 const std::string &name() const;
100 * Adds an option collection as a subsection of this collection.
102 * \param[in] section Subsection to add.
104 * The name() field of \p section is used as the name of the
105 * subsection. If an attempt is made to add two different subsections
106 * with the same name, this function asserts.
108 * \p section should not have any options added at the point this
111 * Only a pointer to the provided object is stored. The caller is
112 * responsible that the object exists for the lifetime of the
114 * It is not possible to add the same Options object as a subsection to
115 * several different Options.
116 * If an attempt is made, the function asserts.
118 void addSubSection(Options *section);
120 // From IOptionsContainer
121 virtual OptionInfo *addOption(const AbstractOption &settings);
122 using IOptionsContainer::addOption;
123 void addManager(IOptionManager *manager);
124 IOptionsContainer &addGroup();
127 * Notifies the collection that all option values are assigned.
129 * \throws InvalidInputError if invalid user input is detected.
131 * This function should be called after no more option values are
132 * to be assigned. Values in storage variables are guaranteed to be
133 * available only after this call, although in most cases, they are
134 * available already during assignment.
136 * If invalid option values, e.g., missing required option, is detected
137 * at this point, this function throws. The thrown exception contains
138 * information on all errors detected during the call.
143 PrivateImplPointer<internal::OptionsImpl> impl_;
145 //! Needed for the implementation to access subsections.
146 friend class internal::OptionsImpl;
147 //! Needed to be able to extend the interface of this object.
148 friend class OptionsAssigner;
149 //! Needed to be able to extend the interface of this object.
150 friend class OptionsIterator;
151 //! Needed to be able to extend the interface of this object.
152 friend class OptionsModifyingIterator;