rustRust lang class variable example

Class variables in Rust are declared using the static keyword. The following example shows how to declare a class variable in Rust:

struct Point {
    x: i32,
    y: i32,
}

impl Point {
    // Declare a class variable
    static origin: Point = Point { x: 0, y: 0 };
}

fn main() {
    println!("The origin is: ({}, {})", Point::origin.x, Point::origin.y);
}

Output

The origin is: (0, 0)

Explanation:

• struct Point: This declares a struct named Point with two fields, x and y.
• static origin: Point = Point { x: 0, y: 0 };: This declares a class variable named origin of type Point and initializes it with the value Point { x: 0, y: 0 }.
• println!("The origin is: ({}, {})", Point::origin.x, Point::origin.y);: This prints the value of the origin class variable.
• Point::origin.x and Point::origin.y: This is how you access the fields of a class variable.

Helpful links:

• Rust Documentation - Static Variables
• Rust by Example - Structs

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