rustEnum as u8 in Rust

Enum as u8 in Rust is a way to represent an enumeration as a 8-bit unsigned integer. This is useful when you need to store a value in a single byte, such as when working with hardware. To do this, you can use the #[repr(u8)] attribute on the enum. This will cause the compiler to represent the enum as a u8. For example:

#[repr(u8)]
enum Color {
    Red,
    Green,
    Blue,
}

This will cause the compiler to represent the enum as a u8, with Red being 0, Green being 1, and Blue being 2. The output of this code would be:

output example
Color::Red as u8 is 0
Color::Green as u8 is 1
Color::Blue as u8 is 2

The #[repr(u8)] attribute is useful when you need to store a value in a single byte, such as when working with hardware. It is important to note that the enum values must be in the range of 0 to 255 for this to work.

Helpful links

• Rust Enums
• Rust repr attribute
• Rust u8 type

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