this post was submitted on 27 Dec 2024
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struct in Rust (lemmy.ca)
submitted 1 day ago by kionite231@lemmy.ca to c/rust@programming.dev
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Hello,

I learned about struct in Rust, so I just wanted to share what I have learned.

what is struct in Rust? It's the same as what's in C language. eg,

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

that's it this is how we define a struct. we can create all sort of struct with different data types. ( here I have used only i32 but you can use any data type you want)

now Rust also have which we find in OOPs languages like Java. it's called method. here is how we can define methods for a specific struct in Rust.

impl Point {
    fn print_point(&self) {
        println!("x: {} y: {}", self.x, self.y);
    }
}

see it's that easy. tell me if I forgot about something I should include about struct in Rust.

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[–] 404@lemmy.zip 7 points 1 day ago

You can implement Display for custom structs, to print them in the regular manner:

use std::fmt;

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

impl fmt::Display for Point {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "({}, {})", self.x, self.y)
    }
}

fn main() {
    let point = Point { x: 10, y: 20 };
    println!("{}", point); // using standard println!
}

You can also implement things like Add, Sub, AddAssign (point_a += point_b)... :)