src/test/ui/traits/suggest-deferences/multiple-0.rs

   1 // run-rustfix
   2 use std::ops::Deref;
   3
   4 trait Happy {}
   5 struct LDM;
   6 impl Happy for &LDM {}
   7
   8 struct Foo(LDM);
   9 struct Bar(Foo);
  10 struct Baz(Bar);
  11 impl Deref for Foo {
  12     type Target = LDM;
  13     fn deref(&self) -> &Self::Target {
  14         &self.0
  15     }
  16 }
  17 impl Deref for Bar {
  18     type Target = Foo;
  19     fn deref(&self) -> &Self::Target {
  20         &self.0
  21     }
  22 }
  23 impl Deref for Baz {
  24     type Target = Bar;
  25     fn deref(&self) -> &Self::Target {
  26         &self.0
  27     }
  28 }
  29
  30 fn foo<T>(_: T) where T: Happy {}
  31
  32 fn main() {
  33     let baz = Baz(Bar(Foo(LDM)));
  34     foo(&baz);
  35     //~^ ERROR the trait bound `&Baz: Happy` is not satisfied
  36 }