Hi, I am not sure, if this is possible, but I guess not. However, you have two possibilities which come near to what you want achieve. You could always just create an additional "long"-option which has the abbreviated name. Of course, in general you will have to call your option with double-dashes ("--") prefixed, instead of a single dash ("-"). However, when adding "allow_long_disguise" [1] to your style, you then can call your abbreviated long-option with a single dash (if this is important for you). Alternatively, you could add "allow_guessing" [1] to your style and just type the begin of your long-option's name as long as this unambiguously identifies the long-option. With your example you could e.g. write "--re" to match "--resolution" and "--ra" to match "--raster-level". (Using "allow_long_disguise" [1] style should be possible, too.) However, "--rl" to match "--raster-level" will probably not work. (I did not explicitly check.) Note however: Whichever solution you choose, both require to take special care. With the first solutions you must be aware that you have at least two different options that might set the same variable. With the second solution you must take care, that no (entire) long-option name is ever a prefix to another (even longer) long-option name. Additionally, you probably will not get the original help-description-string that you wanted. I hope that helps. Deniz PS: Because I am not the developer of boost::program_options (that is Vladimir Prus) I might be mistaken. If I might have said something wrong or stupid please correct me and let us all know the correct/better solution. [1] http://www.boost.org/doc/libs/1_55_0/doc/html/boost/program_options/command_... Am 06.06.2014 17:10, schrieb tenspd137 .:

Hi all,

I was trying to figure out if there is a way to make the short options use more than one letter to create an abbrieviation. For example:

desc.add_options() ("resolution","re","Choose resolution") ("raster-level,"rl","Chhose raster mode") ....

I know that by convention and definition, short options are just -(letter), so that when you ask to print help, you get something like:

-r [--resolution] arg -r [--raster-level] arg

but I would like to find a way to have

-re [--resolution] arg -rl [--raster-level] arg

Point is, I have some options that start with the same letter, so being able to make short abbreivations or acronyms for them would be helpful. If this is possible, it isn't real clear to me how, and I haven't turned up much in google.

Any suggestions?

Thanks!

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