rustHow to compare structs in Rust

Comparing structs in Rust is done using the PartialEq and Eq traits. The PartialEq trait allows for comparison of two structs using the == operator, while the Eq trait allows for comparison of two structs using the == and != operators.

Example code

use std::cmp::PartialEq;

#[derive(PartialEq)]
struct Point {
    x: i32,
    y: i32,
}

fn main() {
    let p1 = Point { x: 1, y: 2 };
    let p2 = Point { x: 1, y: 2 };
    assert!(p1 == p2);
}

Output example

assertion successful

Code explanation

• use std::cmp::PartialEq: This imports the PartialEq trait from the std::cmp module.
• #[derive(PartialEq)]: This derives the PartialEq trait for the Point struct, allowing it to be compared using the == operator.
• let p1 = Point { x: 1, y: 2 };: This creates a Point struct with x and y values of 1 and 2 respectively.
• let p2 = Point { x: 1, y: 2 };: This creates a second Point struct with x and y values of 1 and 2 respectively.
• assert!(p1 == p2);: This uses the == operator to compare the two Point structs, and asserts that they are equal.

Helpful links

• Rust Documentation - PartialEq
• Rust Documentation - Eq

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