Shared via Rust Playground

playground.rs

#[derive(Debug)]
struct Response<T> {
    foo: String,
    bar: String,
    unknown: T
}


enum Action {
    One,
    Two(u8),
    Three(String)
}

fn one() -> String {
    String::from("foo")
}

fn two(x: u8) -> u8 {
    x
}

fn three(s: String) -> i32 {
    42
}

fn do_something<T>(action: Action) -> Response<T> {
    
    Response {
        foo: String::from("foo"),
        bar: String::from("bar"),
        unknown: match action {
            Action::One => one(),
            Action::Two(x) => two(x),
            Action::Three(s) => three(s),
        }
    }
}


fn main() {
    let res = do_something(Action::Two(42));
    print!("{:?}", res)
}