有没有办法将现有结构用作枚举变体? [英] Is there a way to use existing structs as enum variants?

问题描述

我将枚举用于多态，类似于以下内容:

I'm using an enum for polymorphism, similar to the following:

enum MyType {
    Variant1 { a: i32, b: i32 },
    Variant2 { a: bool, b: bool },
}

是否有干净的方法来使用 Variant1 和 Variant2 的现有结构?我已完成以下操作:

Is there clean way to use existing structs for Variant1 and Variant2? I've done the following:

struct Variant1 {
    a: i32,
    b: i32,
}

struct Variant2 {
    a: bool,
    b: bool,
}

enum MyType {
    Variant1(Variant1),
    Variant2(Variant2),
}

但感觉很笨重.我想知道是否有更好的方法来完成类似的事情.

but it feels pretty clunky. I was wondering if there's a better way to accomplish a similar thing.

推荐答案

有多个关于使枚举变体成为自己类型的 RFC:

There have been multiple RFCs about making enum variants their own type:

• RFC 1450:枚举变体的类型
• RFC 2593:枚举变体类型

不幸的是，它们已被推迟或尚未决定，因为这不被视为语言优先事项.

Unfortunately, they have been postponed or not yet decided on as this is not considered a language priority.

这意味着现在，您提出的方式是拥有枚举变体类型的唯一方法.

This means that right now, the way you have proposed is the only way to have types for enum variants.

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