New library: argparse, for parsing CLI arguments

[Andrey Zherikov]

On Wednesday, 13 October 2021 at 19:26:49 UTC, Andrei 
Alexandrescu wrote:
> Cool!
>
> One note - gflags (https://opensource.google/projects/gflags) 
> allows modules to define their own flags in a decentralized 
> manner. I've always thought this is a major feature missing 
> from std.getopt, but never got around to it. It would be great 
> if argparse would add such support.

This is an interesting approach. I'm not a fan of it but I'll 
take a look at whether this can be supported.