rust - Is there a way to use existing structs as enum variants?

Question

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

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

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),
}

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

Answer 1

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

• RFC 1450: Types for enum variants
• RFC 2593: Enum variant types

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

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