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

   1 warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
   2   --> $DIR/equality.rs:1:12
   3    |
   4 LL | #![feature(specialization)]
   5    |            ^^^^^^^^^^^^^^
   6    |
   7    = note: `#[warn(incomplete_features)]` on by default
   8    = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
   9    = help: consider using `min_specialization` instead, which is more stable and complete
  10
  11 error[E0308]: mismatched types
  12   --> $DIR/equality.rs:15:5
  13    |
  14 LL | fn two(x: bool) -> impl Foo {
  15    |                    -------- expected `i32` because of return type
  16 ...
  17 LL |     0_u32
  18    |     ^^^^^ expected `i32`, found `u32`
  19    |
  20 help: change the type of the numeric literal from `u32` to `i32`
  21    |
  22 LL |     0_i32
  23    |       ~~~
  24
  25 error[E0277]: cannot add `impl Foo` to `u32`
  26   --> $DIR/equality.rs:24:11
  27    |
  28 LL |         n + sum_to(n - 1)
  29    |           ^ no implementation for `u32 + impl Foo`
  30    |
  31    = help: the trait `Add<impl Foo>` is not implemented for `u32`
  32    = help: the following other types implement trait `Add<Rhs>`:
  33              <&'a f32 as Add<f32>>
  34              <&'a f64 as Add<f64>>
  35              <&'a i128 as Add<i128>>
  36              <&'a i16 as Add<i16>>
  37              <&'a i32 as Add<i32>>
  38              <&'a i64 as Add<i64>>
  39              <&'a i8 as Add<i8>>
  40              <&'a isize as Add<isize>>
  41            and 48 others
  42
  43 error: aborting due to 2 previous errors; 1 warning emitted
  44
  45 Some errors have detailed explanations: E0277, E0308.
  46 For more information about an error, try `rustc --explain E0277`.