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37 * Declares gmx::CommandLineHelpWriter.
39 * \author Teemu Murtola <teemu.murtola@gmail.com>
41 * \ingroup module_commandline
43 #ifndef GMX_COMMANDLINE_CMDLINEHELPWRITER_H
44 #define GMX_COMMANDLINE_CMDLINEHELPWRITER_H
48 #include "gromacs/utility/classhelpers.h"
53 class CommandLineHelpContext;
56 template <typename T> class ConstArrayRef;
59 * Writes help information for Options.
62 * \ingroup module_commandline
64 class CommandLineHelpWriter
68 * Creates an object that writer ascii-formatted help for Options.
70 * \param[in] options Options for which help should be printed.
72 explicit CommandLineHelpWriter(const Options &options);
73 ~CommandLineHelpWriter();
76 * Sets time unit to show in descriptions.
78 * \param[in] timeUnit Time unit to show in descriptions.
79 * \throws std::bad_alloc if out of memory.
81 * For each time parameter, any "%t" in the description is replaced
83 * If not called, uses a default "ps".
85 CommandLineHelpWriter &setTimeUnitString(const char *timeUnit);
87 * Sets the help text to print as description.
89 * \param[in] help Help text to show.
90 * \throws std::bad_alloc if out of memory.
92 * If `help` is empty, or this method is not called, only a list of
94 * Formatting for the help text is described on \ref page_onlinehelp.
96 CommandLineHelpWriter &setHelpText(const std::string &help);
97 //! \copydoc setHelpText(const std::string &)
98 CommandLineHelpWriter &
99 setHelpText(const ConstArrayRef<const char *> &help);
101 * Sets the list of known bugs/limitations.
103 * \param[in] bugs Array of bugs/limitations.
105 * Each entry in the input array identifies a separate issue.
106 * The array passed should remain valid for the lifetime of the writer
109 CommandLineHelpWriter &
110 setKnownIssues(const ConstArrayRef<const char *> &bugs);
115 * \param[in] context Context object for writing the help.
116 * \throws std::bad_alloc if out of memory.
117 * \throws FileIOError on any I/O error.
119 void writeHelp(const CommandLineHelpContext &context);
124 PrivateImplPointer<Impl> impl_;