| error[E0271]: type mismatch resolving `<Adapter<I> as Iterator>::Item == std::option::Option<T>` |
| --> $DIR/associated-types-issue-20346.rs:34:5 |
| | |
| LL | fn is_iterator_of<A, I: Iterator<Item=A>>(_: &I) {} |
| | -------------- ------ required by this bound in `is_iterator_of` |
| ... |
| LL | is_iterator_of::<Option<T>, _>(&adapter); |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected enum `std::option::Option`, found type parameter |
| | |
| = note: expected type `std::option::Option<T>` |
| found type `T` |
| = help: type parameters must be constrained to match other types |
| = note: for more information, visit https://doc.rust-lang.org/book/ch10-02-traits.html#traits-as-parameters |
| |
| error: aborting due to previous error |
| |
| For more information about this error, try `rustc --explain E0271`. |
