41 lines
1.7 KiB
Plaintext
41 lines
1.7 KiB
Plaintext
warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
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--> $DIR/equality.rs:1:12
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LL | #![feature(specialization)]
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| ^^^^^^^^^^^^^^
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= note: `#[warn(incomplete_features)]` on by default
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= note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
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= help: consider using `min_specialization` instead, which is more stable and complete
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error[E0308]: mismatched types
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--> $DIR/equality.rs:15:5
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LL | fn two(x: bool) -> impl Foo {
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| -------- expected because this return type...
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LL | if x {
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LL | return 1_i32;
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| ----- ...is found to be `i32` here
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LL | }
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LL | 0_u32
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| ^^^^^ expected `i32`, found `u32`
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= note: to return `impl Trait`, all returned values must be of the same type
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= note: for information on `impl Trait`, see <https://doc.rust-lang.org/book/ch10-02-traits.html#returning-types-that-implement-traits>
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= help: if the trait `Foo` were object safe, you could return a boxed trait object
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= 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>
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= help: you could instead create a new `enum` with a variant for each returned type
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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)
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| ^ no implementation for `u32 + impl Foo`
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= help: the trait `Add<impl Foo>` is not implemented for `u32`
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error: aborting due to 2 previous errors; 1 warning emitted
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Some errors have detailed explanations: E0277, E0308.
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For more information about an error, try `rustc --explain E0277`.
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