Core Traits

Fundamental traits ที่เป็นพื้นฐานของ Rust

Copy และ Clone

fn main() {
    // Copy - implicit bitwise copy
    let x: i32 = 42;
    let y = x;  // Copy
    println!("x: {}, y: {}", x, y);  // Both valid

    // Clone - explicit duplication
    let s1 = String::from("hello");
    let s2 = s1.clone();  // Clone
    println!("s1: {}, s2: {}", s1, s2);  // Both valid

    // Without clone - move
    let s3 = String::from("world");
    let s4 = s3;  // Move
    // println!("{}", s3);  // Error: s3 moved
    println!("s4: {}", s4);

    // Copy types
    println!("\n=== Copy Types ===");
    println!("Integers: i8, i16, i32, i64, i128, u*");
    println!("Floats: f32, f64");
    println!("bool, char");
    println!("References: &T");
    println!("Tuples of Copy types");
    println!("Arrays of Copy types");

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

    let p1 = Point { x: 1, y: 2 };
    let p2 = p1;  // Copy
    println!("\np1: {:?}, p2: {:?}", p1, p2);
}