Allow to customize help flag.

[lambdafu]

Another little helper: Allows to customize the help flag without fully exposing help_ptr_. This makes it possible to translate the string, for example. Inspired by taywee/args.

[codecov]

Codecov Report

Merging #43 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master    #43   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           9      9           
  Lines        1168   1174    +6     
  Branches      239    240    +1     
=====================================
+ Hits         1168   1174    +6

Impacted Files	Coverage Δ
include/CLI/App.hpp	100% <100%> (ø)	⬆️

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[codecov]

Codecov Report

Merging #43 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master    #43   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           9      9           
  Lines        1171   1179    +8     
  Branches      240    242    +2     
=====================================
+ Hits         1171   1179    +8

Impacted Files	Coverage Δ
include/CLI/App.hpp	100% <100%> (ø)	⬆️

---

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Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 79cd791...aba829b. Read the comment docs.

[henryiii]

Does it really need to throw if the help pointer is already set? Couldn't it just deregister the old help pointer instead? That way, someone who just wants to change the help string or flag name doesn't have to know about the false argument to App.

[henryiii]

Other than the answer to that question, it looks good. I added a /// comment, those are rendered into Doxygen API docs, and moved to using this internally as well.

[lambdafu]

Deregistering would be better, but I don't know how to do that :)

[henryiii]

Okay, I can add that, just a second..

[henryiii]

Thanks!