b7fc1a7431
When a trait is not implemented for a type, but there *is* an `impl` for another type or different trait params, we format the output to use highlighting in the same way that E0308 does for types. The logic accounts for 3 cases: - When both the type and trait in the expected predicate and the candidate are different - When only the types are different - When only the trait generic params are different For each case, we use slightly different formatting and wording.
39 lines
1.9 KiB
Text
39 lines
1.9 KiB
Text
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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| 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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| +
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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<()>` is not implemented for `Vec<(u32, _, _)>`
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but trait `FromIterator<(u32, _, _)>` is implemented for it
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= help: for that trait implementation, expected `(u32, _, _)`, found `()`
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note: the method call chain might not have had the expected associated types
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--> $DIR/issue-34334.rs:5:43
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LL | let sr: Vec<(u32, _, _) = vec![];
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| ------ this expression has type `Vec<(_, _, _)>`
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...
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LL | let sr2: Vec<(u32, _, _)> = sr.iter().map(|(faction, th_sender, th_receiver)| {}).collect();
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| ------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `Iterator::Item` changed to `()` here
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| `Iterator::Item` is `&(_, _, _)` here
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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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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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