Provides an alternative option name. This is mostly
convenient on the command line.
The shortname will be added verbatim. This allows
to provide multiple alternatives at once.
Internally the struct member name and the short name
will be simply concatenated with the vertical bar ('|').
Provides an alternative option name. This is mostly convenient on the command line.
The shortname will be added verbatim. This allows to provide multiple alternatives at once. Internally the struct member name and the short name will be simply concatenated with the vertical bar ('|').