An enum value is a value that can be one of a set of possible variants. Enums are a powerful tool in Rust for representing data that can have different forms. For example, the following enum represents the possible results of a coin flip:
enum CoinFlip {
Heads,
Tails,
}
The enum has two variants, `Heads` and `Tails`, which represent the two possible results of a coin flip. We can create an instance of the enum like this:
let coin_flip = CoinFlip::Heads;
We can then use the `coin_flip` variable to represent the result of the coin flip.
Enums can also be used to represent more complex data. For example, the following enum represents the possible results of a HTTP request:
enum HttpResponse {
Success(String),
Failure(String),
}
The enum has two variants, `Success` and `Failure`, which represent the two possible results of a HTTP request. The `Success` variant contains the body of the HTTP response, and the `Failure` variant contains an error message. We can create an instance of the enum like this:
let http_response = HttpResponse::Success(String::from("OK"));
We can then use the `http_response` variable to represent the result of the HTTP request.
