mirror of https://github.com/rust-lang/rust
54 lines
1.6 KiB
Plaintext
54 lines
1.6 KiB
Plaintext
error: at least one trait must be specified
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--> $DIR/issue-78720.rs:1:16
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LL | fn server() -> impl {
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| ^^^^
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error[E0412]: cannot find type `F` in this scope
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--> $DIR/issue-78720.rs:13:12
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LL | _func: F,
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| ^
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--> $SRC_DIR/core/src/ops/function.rs:LL:COL
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= note: similarly named trait `Fn` defined here
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help: a trait with a similar name exists
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LL | _func: Fn,
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| ~~
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help: you might be missing a type parameter
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LL | struct Map2<Segment2, F> {
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| +++
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error[E0308]: mismatched types
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--> $DIR/issue-78720.rs:7:39
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LL | fn map2<F>(self, f: F) -> Map2<F> {}
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| ^^ expected `Map2<F>`, found `()`
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= note: expected struct `Map2<F>`
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found unit type `()`
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error[E0277]: the size for values of type `Self` cannot be known at compilation time
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--> $DIR/issue-78720.rs:7:16
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LL | fn map2<F>(self, f: F) -> Map2<F> {}
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| ^^^^ doesn't have a size known at compile-time
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= help: unsized fn params are gated as an unstable feature
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help: consider further restricting `Self`
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LL | fn map2<F>(self, f: F) -> Map2<F> where Self: Sized {}
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| +++++++++++++++++
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help: function arguments must have a statically known size, borrowed types always have a known size
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LL | fn map2<F>(&self, f: F) -> Map2<F> {}
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| +
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error: aborting due to 4 previous errors
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Some errors have detailed explanations: E0277, E0308, E0412.
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For more information about an error, try `rustc --explain E0277`.
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