as_pair flag from_aux_file named named named OptionsDescription positional positional positional PositionalOptionsDescription ProgramOptions ValueSemantics ~ProgramOptions

flag() void flag ( const char *  name, const char *  description  ) Add a flag. Parameters name The flag name description The flag description A flag is a named option which is either set (implicitely to true) or omitted, in which case the value is false. A flag is simply set as: Program --flag