3aac307ca6
When encountering an unsatisfied trait bound, if there are no other
suggestions, mention all the types that *do* implement that trait:
```
error[E0277]: the trait bound `f32: Foo` is not satisfied
--> $DIR/impl_wf.rs:22:6
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LL | impl Baz<f32> for f32 { }
| ^^^^^^^^ the trait `Foo` is not implemented for `f32`
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= help: the following other types implement trait `Foo`:
Option<T>
i32
str
note: required by a bound in `Baz`
--> $DIR/impl_wf.rs:18:31
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LL | trait Baz<U: ?Sized> where U: Foo { }
| ^^^ required by this bound in `Baz`
```
Mention implementers of traits in `ImplObligation`s.
Do not mention other `impl`s for closures, ranges and `?`.
32 lines
1.4 KiB
Plaintext
32 lines
1.4 KiB
Plaintext
error: expected one of `,`, `:`, or `>`, found `=`
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--> $DIR/issue-34334.rs:2:29
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LL | let sr: Vec<(u32, _, _) = vec![];
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| -- - ^ expected one of `,`, `:`, or `>`
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| | maybe try to close unmatched angle bracket
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| while parsing the type for `sr`
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help: you might have meant to end the type parameters here
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LL | let sr: Vec<(u32, _, _)> = vec![];
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error[E0277]: a value of type `Vec<(u32, _, _)>` cannot be built from an iterator over elements of type `()`
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--> $DIR/issue-34334.rs:5:87
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LL | let sr2: Vec<(u32, _, _)> = sr.iter().map(|(faction, th_sender, th_receiver)| {}).collect();
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| ^^^^^^^ value of type `Vec<(u32, _, _)>` cannot be built from `std::iter::Iterator<Item=()>`
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= help: the trait `FromIterator<()>` is not implemented for `Vec<(u32, _, _)>`
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= help: the trait `FromIterator<T>` is implemented for `Vec<T>`
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note: required by a bound in `collect`
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--> $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL
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LL | fn collect<B: FromIterator<Self::Item>>(self) -> B
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| ^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `collect`
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error: aborting due to 2 previous errors
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For more information about this error, try `rustc --explain E0277`.
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