Enumeration variants can be constructed similarly to structs, using a path to an enum variant instead of to a struct:

#![allow(unused_variables)]
fn main() {
enum Message {
    Quit,
    WriteString(String),
    Move { x: i32, y: i32 },
}
let q = Message::Quit;
let w = Message::WriteString("Some string".to_string());
let m = Message::Move { x: 50, y: 200 };
}