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嵌套解构 - 夜雨秋灯录

 2 years ago
source link: https://privaterookie.github.io/notes/rust/2021-10-31-%E5%B5%8C%E5%A5%97%E8%A7%A3%E6%9E%84.html
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夜雨秋灯录

嵌套结构

rust 支持嵌套解构

pub enum Inner {
    A(i32),
    B(u32)
}

pub enum Outer {
    Span,
    P(Inner)
}

fn main() {
    let x = Outer::P(Inner::A(12));
    if let Outer::P(Inner::A(i)) = x {
        println!("{}", i);
    }
}

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