Question: Option requires one of two other options

[ptc-tgamper]

Hi,

I am in the situation where I have options -D, -E, and -F. What I need is that if -D is provided, then exactly one of -E and -F has to be specified, too.
Providing -D with -E is valid. Providing -D with -F is valid.
Providing only -D is invalid. Providing -D, -E, and -F is invalid. Providing only -E is invalid. Providing only -F is invalid.

I haven't found a way to do this yet.

Otherwise I am really happy with CLI11 and the functionality it provides. Kudos to the authors.

Thanks,
Thomas

[phlptp]

I think the easiest way would be to put the D option in 1 option group and the E and F option in another group. Make the E and F options exclusive or use the option_group required count so the min and max required is 1. Then for the D group use it to trigger the E and F option group on. using CLI::TriggerOn helper. To make the help more useful you may have to catch some specific errors related to using the E and F without D to make the help message more useful

[ptc-tgamper]

I had to do both. Mark E and F to exclude each other, and to tell their group that only a single option is allowed. Then I am getting reasonable error messages.

Still this leaves me a bit unhappy, because I have now groups in the help message, where I would prefer not to have them. Especially because I have options that belong together, but are in different groups.

[phlptp]

in the main branch, if you add an option group with a name that begins with a '+' it should now display as part of the parent group/app.