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

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error[E0308]: mismatched types
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--> $DIR/equality.rs:15:5
|
LL | fn two(x: bool) -> impl Foo {
| -------- expected because this return type...
LL | if x {
LL | return 1_i32;
| ----- ...is found to be `i32` here
LL | }
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LL | 0_u32
| ^^^^^ expected `i32`, found `u32`
|
= note: `impl Trait` as a return type requires that all the returned values must have the same type
= help: you can instead return a trait object using `Box<dyn Foo>`
= note: for information on `impl Trait`, see <https://doc.rust-lang.org/book/ch10-02-traits.html#returning-types-that-implement-traits>
= note: for information on trait objects, see <https://doc.rust-lang.org/book/ch17-02-trait-objects.html#using-trait-objects-that-allow-for-values-of-different-types>
error[E0277]: cannot add `impl Foo` to `u32`
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--> $DIR/equality.rs:24:11
|
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LL | n + sum_to(n - 1)
| ^ no implementation for `u32 + impl Foo`
|
= help: the trait `std::ops::Add<impl Foo>` is not implemented for `u32`
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error: aborting due to 2 previous errors
Some errors have detailed explanations: E0277, E0308.
2018-03-03 14:59:40 +00:00
For more information about an error, try `rustc --explain E0277`.