Use the Default trait for enum argument

[wiiznokes]

Why not use the Default trait instead of default_value_t = MyEnum::Variant?

[epage]

An application can use either (and default_value_t is a shorthand for the field's type's default). What you use is dependent on your application.

[wiiznokes]

An application can use either (and default_value_t is a shorthand for the field's type's default). What you use is dependent on your application.

I don't understand, this is my code

use clap::{Parser, ValueEnum};

#[derive(Debug, Default, Clone, ValueEnum)]
enum Choice {
    #[default]
    A,
    B,
}

impl ToString for Choice {
    fn to_string(&self) -> String {
        match self {
            Choice::A => "a".into(),
            Choice::B => "b".into(),
        }
    }
}

#[derive(Debug, Parser)]
struct S {
    #[arg(default_value_t = Choice::A)]
    c: Choice,
}

fn main() {
    let s = S::parse();
    println!("{:?}", s);
}

I would like smtg like:

struct S {
    #[arg(default_value_use_default_trait)]
    c: Choice,
}

[epage]

#[derive(Debug, Parser)]
struct S {
    #[arg(default_value_t)]
    c: Choice,
}

[wiiznokes]

Oh okay, thanks