从结构中创建枚举

Question

I want to make an enum from a struct.

The definitions:

struct Point {
    x: u8,
    y: u8,
}

enum Message {
    Move { x: u8, y: u8 },
    nothing,
}

So if I have instantiated a Point in my code, how can I make a Message from the struct?

I've tried this code:

Message::Move(Point { x: 10, y: 15 })

But this code throws an error saying

error[E0423]: expected function, tuple struct or tuple variant, found struct variant `Message::Move`

Answer 1

Your enum variant can simply contain an instance of the struct.

enum Message {
  Move(Point),
  NoMessage,
}

Then the syntax you wanted will work as-is.

Message::Move(Point { x: 10, y: 15 })