struct Point
    x: int,
    y: int,
end

enum Status
    Ok,
    Error,
end

fn add(a: int, b: int) -> int do
    a + b
end

fn main() -> int do
    # Test stack-allocated types (copyable)
    let x = 10;
    let y = 20;
    let sum = add(x, y);
    
    # Test struct (stack-allocated for now, but declared as such in language)
    let p = Point { x: 5, y: 15 };
    let point_sum = p.x + p.y;
    
    # Test enum (stack-allocated for now)
    let status = Status::Ok();
    
    # Test array (heap-allocated)
    let arr = [1, 2, 3, 4, 5];
    let first = arr[0];
    
    # Test string (heap-allocated)
    let msg = "hello";
    sum + point_sum + first

end