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  1. trait FooPow {
  2.     fn pow(&self) -> i32;
  3. }
  4.  
  5. struct Foo(i32);
  6.  
  7. impl<'a> FooPow for &'a Foo {
  8.     fn pow(&self) -> i32 {
  9.         self.0 * self.0
  10.     }
  11. }
  12.  
  13. /*impl<'a> FooPow for &'a mut Foo {
  14.     fn pow(&self) -> i32 {
  15.         self.0 * self.0
  16.     }
  17. }*/
  18.  
  19. fn test1(x: &Foo) {
  20.     println!("{}", x.pow());
  21. }
  22.  
  23. fn test2(x: &mut Foo) {
  24.     println!("{}", (&*x).pow());
  25. }
  26.  
  27. fn main() {
  28.     test1(&Foo(42));
  29.     test2(&mut Foo(42));
  30. }
Success #stdin #stdout 0s 4492KB
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https://ideone.com/2CGv1R
language:
Rust (rust 1.56)
created:
6 years ago
visibility:
public

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