Access subcommand from Base Command.

[amrx101]

 #[derive(FromArgs, PartialEq, Debug)]
/// Top-level command.
struct TopLevel {
  #[argh(subcommand)]
  nested: MySubCommandEnum,
  /// number of connections
  #[argh(option, short = 'c', default = "1")]
  connections: usize,
}

 #[derive(FromArgs, PartialEq, Debug)]
 #[argh(subcommand)]
 enum MySubCommandEnum {
   Pub(PublishConfig),
   Sub(SubConfig),
 }

Here in we have 2 sub commands for a base command.

in main.rs

 let base = argh::from_env()

After that I want to filter out he nested command and use one appropriately.

 let sub_command = tt.nested;
println!("{:?}", sub_command);

match sub_command {
    MySubCommandEnum::Pub => {
        println!("We have to do Publish");
    },
    MySubCommandEnum::Sub => {
        println!("We have to subs");
    },
}

When I try to do something like this, I get following error expected unit struct, unit variant or constant, found tuple variant MySubCommandEnum::Pubdid you meanMySubCommandEnum::Pub`

What am I missing? Thanks in advance.

[benbrittain]

Hi! This is actually unrelated to argh, it's related to how you use enums with match statements with Rust. You need to write something like:

match sub_command {
    MySubCommandEnum::Pub(config) => { // now you can access PublishConfig
        println!("We have to do Publish");
    },
    MySubCommandEnum::Sub(_) => { // if you want to ignore the value use a type hole
        println!("We have to subs");
    },
}