Rust Quick Start Guide

Basic enumerations

In Rust, an enumeration is a data type representing one of a fixed set of values. For example, we could define an enumeration of the commonly recognized seven colors of the rainbow, as shown here:

pub enum Color {    Red,    Orange,    Yellow,    Green,    Blue,    Indigo,    Violet,}

Once we define this enumeration, we can use Color as a data type and Color::Red or the like as data values of that type:

let color: Color = Color::Green;

An enumeration is created with the enum keyword. Notice that, like a structure, an enumeration needs the pub keyword if we want it to be directly accessible outside the current module. Between the { and }, we have the list of possible values for the data type, listed by name and separated by commas.

Rust is somewhat ...