What types implement the Copy trait

All primitive scalar types (like i32, u8, bool, f64) and tuples or arrays containing only Copy types implement the Copy trait by default. You can also derive it for your own structs if all their fields are Copy.

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

fn main() {
    let p1 = Point { x: 1, y: 2 };
    let p2 = p1; // p1 is copied, not moved
    println!("{p1}, {p2}"); // Both are valid
}

The Copy trait tells Rust that a type is cheap to duplicate, like a simple number or a small struct. When you assign a Copy type to a new variable, Rust creates a bit-for-bit duplicate instead of moving the original value. Think of it like photocopying a sticky note; you still have the original, and you now have a new one too.