src/test/ui/impl-trait/trait_type.stderr

   1 error[E0053]: method `fmt` has an incompatible type for trait
   2   --> $DIR/trait_type.rs:7:4
   3    |
   4 LL |    fn fmt(&self, x: &str) -> () { }
   5    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ types differ in mutability
   6    |
   7    = note: expected fn pointer `fn(&MyType, &mut std::fmt::Formatter<'_>) -> std::result::Result<(), std::fmt::Error>`
   8               found fn pointer `fn(&MyType, &str)`
   9
  10 error[E0050]: method `fmt` has 1 parameter but the declaration in trait `std::fmt::Display::fmt` has 2
  11   --> $DIR/trait_type.rs:12:11
  12    |
  13 LL |    fn fmt(&self) -> () { }
  14    |           ^^^^^ expected 2 parameters, found 1
  15    |
  16    = note: `fmt` from trait: `fn(&Self, &mut std::fmt::Formatter<'_>) -> std::result::Result<(), std::fmt::Error>`
  17
  18 error[E0186]: method `fmt` has a `&self` declaration in the trait, but not in the impl
  19   --> $DIR/trait_type.rs:17:4
  20    |
  21 LL |    fn fmt() -> () { }
  22    |    ^^^^^^^^^^^^^^ expected `&self` in impl
  23    |
  24    = note: `fmt` from trait: `fn(&Self, &mut std::fmt::Formatter<'_>) -> std::result::Result<(), std::fmt::Error>`
  25
  26 error[E0046]: not all trait items implemented, missing: `fmt`
  27   --> $DIR/trait_type.rs:21:1
  28    |
  29 LL | impl std::fmt::Display for MyType4 {}
  30    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ missing `fmt` in implementation
  31    |
  32    = help: implement the missing item: `fn fmt(&self, _: &mut std::fmt::Formatter<'_>) -> std::result::Result<(), std::fmt::Error> { todo!() }`
  33
  34 error: aborting due to 4 previous errors
  35
  36 Some errors have detailed explanations: E0046, E0050, E0053, E0186.
  37 For more information about an error, try `rustc --explain E0046`.