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error[E0599]: the function or associated item `partial_cmp` exists for struct `A`, but its trait bounds were not satisfied
--> $DIR/derive-sugg-arg-arity.rs:5:23
|
LL | pub struct A;
| ------------ function or associated item `partial_cmp` not found for this struct because it doesn't satisfy `A: Iterator` or `A: PartialOrd<_>`
...
LL | _ => match A::partial_cmp() {},
| ^^^^^^^^^^^ function or associated item cannot be called on `A` due to unsatisfied trait bounds
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= note: the following trait bounds were not satisfied:
`A: PartialOrd<_>`
which is required by `&A: PartialOrd<&_>`
`A: PartialOrd<_>`
which is required by `&mut A: PartialOrd<&mut _>`
`A: Iterator`
which is required by `&mut A: Iterator`
note: the trait `Iterator` must be implemented
--> $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL
help: consider annotating `A` with `#[derive(PartialEq, PartialOrd)]`
|
LL + #[derive(PartialEq, PartialOrd)]
LL | pub struct A;
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error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0599`.
|
