Directly iterating over all values of an enum in Rust is not natively supported because Rust enums can contain data of different types and varying numbers of fields, which makes automatic iteration complex. However, you can achieve this by implementing an iterator or using a third-party library.

A common approach is to use the `strum` library, which provides functionality for iterating over enums. First, add the `strum` and `strum_macros` dependencies to your `Cargo.toml`:

```toml
[dependencies]
strum = "0.20"
strum_macros = "0.20"
```

Then, use the `EnumIter` macro from `strum_macros` to automatically generate iteration-related code for your enum type:

```rust
use strum_macros::EnumIter;
use strum::IntoEnumIterator;

#[derive(Debug, EnumIter)]
enum Color {
    Red,
    Blue,
    Green,
}

fn main() {
    for color in Color::iter() {
        println!("{:?}", color);
    }
}
```

This code will print all enum values: `Red`, `Blue`, and `Green`. Using the `strum` library is a convenient way to iterate over enum values.

Is There a Way to Iterate Enum Values in Rust?