match 分支

所有结果都得匹配到

// Match Expressionfn main() {#[derive(Debug)]enum Language {English,Spanish,Russian,Japanese,}let language = Language::English;match language {Language::English => println!("Hello World!"),Language::Spanish => println!("Hola Mundo!"),Language::Russian => println!("npuBeT, Mnp!"),//_=> println!("Unsupported language!"),lang => println!("Unsupported language! {:?}", lang),}
}

参考

• 第18章～模式和匹配