同样，一个结构可以解构如图所示：
| fn main() { |
| struct Foo { x: (u32, u32), y: u32 } |
| // destructure members of the struct |
| let foo = Foo { x: (1, 2), y: 3 }; |
| let Foo { x: (a, b), y } = foo; |
| println!("a = {}, b = {}, y = {} ", a, b, y); |
| // you can destructure structs and rename the variables, |
| // the order is not important |
| let Foo { y: i, x: j } = foo; |
| println!("i = {:?}, j = {:?}", i, j); |
| // and you can also ignore some variables: |
| let Foo { y, .. } = foo; |
| println!("y = {}", y); |
| // this will give an error: pattern does not mention field `x` |
| // let Foo { y } = foo; |
| } |
