error[E0404]: expected trait, found struct `Struct`
  --> $DIR/suggest-swapping-self-ty-and-trait.rs:10:13
   |
LL | impl<'a, T> Struct<T> for Trait<'a, T> {}
   |             ^^^^^^^^^ not a trait
   |
help: `impl` items mention the trait being implemented first and the type it is being implemented for second
   |
LL | impl<'a, T> Trait<'a, T> for Struct<T> {}
   |             ~~~~~~~~~~~~     ~~~~~~~~~

error[E0404]: expected trait, found enum `Enum`
  --> $DIR/suggest-swapping-self-ty-and-trait.rs:15:13
   |
LL | impl<'a, T> Enum<T> for Trait<'a, T> {}
   |             ^^^^^^^ not a trait
   |
help: `impl` items mention the trait being implemented first and the type it is being implemented for second
   |
LL | impl<'a, T> Trait<'a, T> for Enum<T> {}
   |             ~~~~~~~~~~~~     ~~~~~~~

error[E0404]: expected trait, found union `Union`
  --> $DIR/suggest-swapping-self-ty-and-trait.rs:18:13
   |
LL | impl<'a, T> Union<T> for Trait<'a, T> {}
   |             ^^^^^^^^ not a trait
   |
help: `impl` items mention the trait being implemented first and the type it is being implemented for second
   |
LL | impl<'a, T> Trait<'a, T> for Union<T> {}
   |             ~~~~~~~~~~~~     ~~~~~~~~

warning: trait objects without an explicit `dyn` are deprecated
  --> $DIR/suggest-swapping-self-ty-and-trait.rs:10:27
   |
LL | impl<'a, T> Struct<T> for Trait<'a, T> {}
   |                           ^^^^^^^^^^^^
   |
   = note: `#[warn(bare_trait_objects)]` on by default
   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
help: use `dyn`
   |
LL | impl<'a, T> Struct<T> for dyn Trait<'a, T> {}
   |                           +++

error: aborting due to 3 previous errors; 1 warning emitted

For more information about this error, try `rustc --explain E0404`.