1  #[derive(Debug)]
 2  struct Rectangle {
 3      width: u32,
 4      height: u32,
 5  }
 6  
 7  impl Rectangle {
 8      fn square(size: u32) -> Self {
 9          Self {
10              width: size,
11              height: size,
12          }
13      }
14  }
15  
16  fn main() {
17      let sq = Rectangle::square(3);
18      println!("{:#?}", sq);
19  }