Support for clap derive?

[jfaust]

I tend to build CLIs with clap's derive macros. I've figured out a relatively painless workaround to use these with reedline-repl-rs, but was wondering if there's any appetite for first-class support?

Something like:

#[derive(clap::Parser)]
struct Args { ... }

let mut repl = Repl::new(())
    with_derived::<Args>()

[arturh85]

I'm not currently working on this project but if someone were to implement this I would happily merge it.