Philip Top

If I am reading your question correctly you want to define a flag `-Z` which essentially acts like you specified `-b -c`. If that is what you mean there is...

I might look at this a little more later on to see if there are things that can be done to make this simpler in the future. In the mean...

Here is an alternative using the app callback ```c++ bool bval{false}; bool cval{false}; auto b = app.add_flag("-b", bval, "set b to true"); auto c = app.add_flag("-c", cval, "set c to...

You might try to use the `parse_complete_callback` that executes a bit earlier in the process. Maybe there is a use case for a fourth callback that executes after the arguments...

I am guessing that is not going to work either, since I am pretty sure that still runs after the option callbacks.

4 callbacks 1). pre_parse - After the first argument is called in the app/subcommand 2). [NEW] post_parse (maybe pre_processing)- After parsing, but before option callbacks and checks are processed 3)....

I would recommend using [SPDX](https://spdx.org/) identifiers in the headers such as ``` // Copyright (c) 2017-2019, University of Cincinnati, developed by Henry Schreiner under NSF AWARD 1414736 and by the...

I believe the formatter that does the printing is polymorphic so you might be able customize the output to meet the requirements. @henryiii would know more, I haven't used that...

are you on master or 1.9? There were some changes in how that situation might be handled after the 1.9 release.

I do not believe this would be possible or wise as it would require circular definitions. The recommendation to achieve the same effect is to put opt1 in a second...