Is there a way to use ArgGroup with #[derive(Clap)]?

[ajeetdsouza]

I have the following struct (clap v3):

#[derive(Clap, Debug)]
pub struct App {
    #[clap(group = "g", long)]
    foo: Vec<String>,
    #[clap(group = "g", long)]
    bar: String,
    #[clap(group = "g", long)]
    baz: bool,
}

How do I check which argument has been selected?

[pksunkara]

Can you describe your question more? What do you mean by selection here?

…

On Mon, Oct 26, 2020, 22:03 ajeetdsouza ***@***.***> wrote: I have the following struct: #[derive(Clap, Debug)]pub struct App { #[clap(group = "g", short)] foo: Vec<String>, #[clap(group = "g", short)] bar: String, #[clap(group = "g", short)] baz: bool, } How do I check which argument has been selected? — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#2186>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AABKU336BBSHF5LMCEFECCTSMXPZLANCNFSM4S75H5MA> .

[ajeetdsouza]

@pksunkara since the arguments foo, bar, and baz are within the same ArgGroup, only one of them can be used at a time (that is, ./myapp --foo x --bar y would throw an error).

With the clap builder pattern, one would use matches.is_present("foo") to check if --foo was used, however, I haven't found a way to do this with a #[derive(Clap)] struct.

[pksunkara]

You can make them option since they are all optional

    #[clap(group = "g", long)]
    bar: Option<String>,
    #[clap(group = "g", long)]
    baz: Option<bool>,

[ajeetdsouza]

Thanks, that works!