La pregunta de ventaja es subjetiva, pero en este caso es brevedad.
Compare esto desde uno de mis proyectos en el hogar:
("help,h", "Generate this help message")
("output-file,o", po::value<std::string>(), "Output filename. Required.")
("tangent,t", "Generate/load tangent-space basis.")
("collada-output,c", "Write a Collada file, rather than our mesh XML format.")
("arrays,a", "Write arrays instead of indexed verts. Cannot combine with Collada writing.")
("flip-tangent,f", "Change the tangent-space basis matrix's handedness. Negates bitangent.")
("map", po::value<std::string>(), "Map filename. Defaults to the ColladaConv directory's 'stdmap.txt' file.")
("vao", po::value<std::vector<std::string> >(), "Sequence of mappings, of the form:\n"
"Name # # # #\n"
"\n"
"Each # is an attribute index to use for this VAO.\n"
"Each VAO name must be unique; you cannot use the same VAO in the same place.")
a esto:
visible.add_options()("help,h", "Generate this help message")
visible.add_options()("output-file,o", po::value<std::string>(), "Output filename. Required.")
visible.add_options()("tangent,t", "Generate/load tangent-space basis.");
visible.add_options()("collada-output,c", "Write a Collada file, rather than our mesh XML format.");
visible.add_options()("arrays,a", "Write arrays instead of indexed verts. Cannot combine with Collada writing.");
visible.add_options()("flip-tangent,f", "Change the tangent-space basis matrix's handedness. Negates bitangent.");
visible.add_options()("map", po::value<std::string>(), "Map filename. Defaults to the ColladaConv directory's 'stdmap.txt' file.");
visible.add_options()("vao", po::value<std::vector<std::string> >(), "Sequence of mappings, of the form:\n"
"Name # # # #\n"
"\n"
"Each # is an attribute index to use for this VAO.\n"
"Each VAO name must be unique; you cannot use the same VAO in the same place.");
asuntos longitud de la línea. Y no tener que tener visible.add_options()
delante de todo hace que sea más fácil de leer.
A los autores de Boost les gusta presumir ... –
"Haunted" es una buena descripción ... Lo entiendo formalmente, pero "se siente" raro ... – thomastiger