New library: argparse, for parsing CLI arguments

[WebFreak001]

On Wednesday, 13 October 2021 at 11:27:40 UTC, Andrey Zherikov 
wrote:
> [...]
> It also doesn't depend on anything besides the standard library.
> [...]

if you want to drop the dependency on std.typecons : Nullable you 
could use https://code.dlang.org/packages/expected, where you can 
additionally return error values with instead of returning null 
on error.

Doesn't cast to bool but can check for .hasError which is more 
explicit.