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37 * Declares gmx::CommandLineOptionsModuleInterface and supporting routines.
39 * \author Teemu Murtola <teemu.murtola@gmail.com>
41 * \ingroup module_commandline
43 #ifndef GMX_COMMANDLINE_CMDLINEOPTIONSMODULE_H
44 #define GMX_COMMANDLINE_CMDLINEOPTIONSMODULE_H
46 #include "gromacs/commandline/cmdlinemodule.h"
51 class CommandLineModuleInterface;
52 class CommandLineModuleManager;
56 * Module that can be run from a command line and uses gmx::Options for
57 * argument processing.
59 * This class provides a higher-level interface on top of
60 * gmx::CommandLineModuleInterface for cases where gmx::Options will be used
61 * for declaring the command-line arguments. The module only needs to declare
62 * the options it uses, and the framework takes care of command-line parsing
63 * and help output. The module typically consists of the following parts:
64 * - init() allows for some interaction between the module and the framework
65 * when running the module; see CommandLineModuleInterface::init(). If no
66 * such customization is necessary, an empty implementation is sufficient.
67 * - initOptions() is called both for running the module and for printing help
68 * for the module, and it should add the options that the module
69 * understands. Values provided for the options are typically stored in
71 * - optionsFinished() can be implemented in case additional processing is
72 * needed (e.g., checking whether an option was set by the user).
73 * - run() is called when running the module, after command-line options have
74 * been parsed and their values stored in the corresponding member
77 * registerModule(), runAsMain(), or createModule() can be used to use modules
78 * of this type in all contexts where a gmx::CommandLineModuleInterface is
79 * expected. These methods create a gmx::CommandLineModuleInterface
80 * implementation that contains the common code needed to parse command-line
81 * options and write help, based on the information provided from the methods
85 * \ingroup module_commandline
87 class CommandLineOptionsModuleInterface
91 * Function pointer to a factory method that returns an interface of
94 * \returns Module to run (should be allocated with `new`).
95 * \throws std::bad_alloc if out of memory.
97 * The caller takes responsibility to `delete` the returned pointer.
99 typedef CommandLineOptionsModuleInterface *(*FactoryMethod)();
102 * Creates a CommandLineModuleInterface to run the specified module.
104 * \param[in] name Name for the module.
105 * \param[in] description Short description for the module.
106 * \param[in] factory Factory that returns the module to run.
107 * \returns CommandLineModuleInterface object that runs the module
108 * returned by \p factory. Caller must `delete` the object.
109 * \throws std::bad_alloc if out of memory.
111 * This is mainly used by tests that want to bypass
112 * CommandLineModuleManager.
114 static CommandLineModuleInterface *
115 createModule(const char *name, const char *description,
116 FactoryMethod factory);
118 * Implements a main() method that runs a single module.
120 * \param argc \c argc passed to main().
121 * \param argv \c argv passed to main().
122 * \param[in] name Name for the module.
123 * \param[in] description Short description for the module.
124 * \param[in] factory Factory that returns the module to run.
126 * This method allows for uniform behavior for binaries that only
127 * contain a single module without duplicating any of the
128 * implementation from CommandLineModuleManager (startup headers,
129 * common options etc.).
131 * \see runCommandLineModule()
134 runAsMain(int argc, char *argv[], const char *name,
135 const char *description, FactoryMethod factory);
137 * Registers a module of a certain type to this manager.
139 * \param manager Manager to register to.
140 * \param[in] name Name for the module.
141 * \param[in] description Short description for the module.
142 * \param[in] factory Factory that returns the module to register.
143 * \throws std::bad_alloc if out of memory.
145 * This method internally creates a CommandLineModuleInterface module
146 * with the given \p name and \p description, and adds that to
147 * \p manager. When run or asked to write the help, the module calls
148 * \p factory to get the actual module, and forwards the necessary
152 registerModule(CommandLineModuleManager *manager,
153 const char *name, const char *description,
154 FactoryMethod factory);
156 * Registers a module to this manager.
158 * \param manager Manager to register to.
159 * \param[in] name Name for the module.
160 * \param[in] description Short description for the module.
161 * \param[in] module Module to register.
162 * The method takes ownership (must have been allocated with `new`).
163 * \throws std::bad_alloc if out of memory.
165 * This method internally creates a CommandLineModuleInterface module
166 * with the given \p name and \p description, and adds that to
169 * This method is mainly used by tests that need to have a reference to
170 * the CommandLineOptionsModuleInterface instance (e.g., for mocking).
173 registerModule(CommandLineModuleManager *manager,
174 const char *name, const char *description,
175 CommandLineOptionsModuleInterface *module);
177 virtual ~CommandLineOptionsModuleInterface();
179 //! \copydoc gmx::CommandLineModuleInterface::init()
180 virtual void init(CommandLineModuleSettings *settings) = 0;
182 * Initializes command-line arguments understood by the module.
184 * \param[in,out] options Options object to add the options to.
186 * When running the module, this method is called after init().
187 * When printing help, there is no call to init(), and this is the only
189 * In both cases, the implementation should add options understood by
190 * the module to \p options. Output values from options should be
191 * stored in member variables.
193 virtual void initOptions(Options *options) = 0;
195 * Called after all option values have been set.
197 * \param[in,out] options Options object in which options are stored.
199 * When running the module, this method is called after all
200 * command-line arguments have been parsed, but while the Options
201 * object still exists.
203 * If the module needs to call, e.g., Options::isSet(), this is the
206 virtual void optionsFinished(Options *options) = 0;
211 * \throws unspecified May throw exceptions to indicate errors.
212 * \returns Exit code for the program.
213 * \retval 0 on successful termination.
215 * This method is called after optionsFinished() when running the
216 * module, and should do all the processing for the module.
218 virtual int run() = 0;