Enum variant expressions - The Rust Reference

# Enumeration Variant expressions

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 };
    #}