5c414094ac
When a method not found on a type parameter could have been provided by any
of multiple traits, suggest each trait individually, instead of a single
suggestion to restrict the type parameter with *all* of them.
Before:
```
error[E0599]: the method `cmp` exists for reference `&T`, but its trait bounds were not satisfied
--> $DIR/method-on-unbounded-type-param.rs:5:10
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LL | (&a).cmp(&b)
| ^^^ method cannot be called on `&T` due to unsatisfied trait bounds
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= note: the following trait bounds were not satisfied:
`T: Ord`
which is required by `&T: Ord`
`&T: Iterator`
which is required by `&mut &T: Iterator`
`T: Iterator`
which is required by `&mut T: Iterator`
help: consider restricting the type parameters to satisfy the trait bounds
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LL | fn g<T>(a: T, b: T) -> std::cmp::Ordering where T: Iterator, T: Ord {
| +++++++++++++++++++++++++
```
After:
```
error[E0599]: the method `cmp` exists for reference `&T`, but its trait bounds were not satisfied
--> $DIR/method-on-unbounded-type-param.rs:5:10
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LL | (&a).cmp(&b)
| ^^^ method cannot be called on `&T` due to unsatisfied trait bounds
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= note: the following trait bounds were not satisfied:
`T: Ord`
which is required by `&T: Ord`
`&T: Iterator`
which is required by `&mut &T: Iterator`
`T: Iterator`
which is required by `&mut T: Iterator`
= help: items from traits can only be used if the type parameter is bounded by the trait
help: the following traits define an item `cmp`, perhaps you need to restrict type parameter `T` with one of them:
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LL | fn g<T: Ord>(a: T, b: T) -> std::cmp::Ordering {
| +++++
LL | fn g<T: Iterator>(a: T, b: T) -> std::cmp::Ordering {
| ++++++++++
```
Fix #108428.
52 lines
2.8 KiB
Plaintext
52 lines
2.8 KiB
Plaintext
error[E0599]: the method `filterx` exists for struct `Map<Repeat, {closure@issue-30786.rs:119:27}>`, but its trait bounds were not satisfied
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--> $DIR/issue-30786.rs:120:22
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LL | pub struct Map<S, F> {
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| -------------------- method `filterx` not found for this struct because it doesn't satisfy `_: StreamExt`
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...
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LL | let filter = map.filterx(|x: &_| true);
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| ^^^^^^^ method cannot be called on `Map<Repeat, {closure@issue-30786.rs:119:27}>` due to unsatisfied trait bounds
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note: the following trait bounds were not satisfied:
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`&'a mut &Map<Repeat, {closure@$DIR/issue-30786.rs:119:27: 119:34}>: Stream`
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`&'a mut &mut Map<Repeat, {closure@$DIR/issue-30786.rs:119:27: 119:34}>: Stream`
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`&'a mut Map<Repeat, {closure@$DIR/issue-30786.rs:119:27: 119:34}>: Stream`
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--> $DIR/issue-30786.rs:98:50
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LL | impl<T> StreamExt for T where for<'a> &'a mut T: Stream {}
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| --------- - ^^^^^^ unsatisfied trait bound introduced here
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= help: items from traits can only be used if the trait is implemented and in scope
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note: `StreamExt` defines an item `filterx`, perhaps you need to implement it
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--> $DIR/issue-30786.rs:66:1
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LL | pub trait StreamExt
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| ^^^^^^^^^^^^^^^^^^^
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error[E0599]: the method `countx` exists for struct `Filter<Map<Repeat, fn(&u64) -> &u64 {identity::<u64>}>, {closure@issue-30786.rs:131:30}>`, but its trait bounds were not satisfied
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--> $DIR/issue-30786.rs:132:24
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LL | pub struct Filter<S, F> {
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| ----------------------- method `countx` not found for this struct because it doesn't satisfy `_: StreamExt`
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...
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LL | let count = filter.countx();
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| ^^^^^^ method cannot be called due to unsatisfied trait bounds
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note: the following trait bounds were not satisfied:
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`&'a mut &Filter<Map<Repeat, for<'a> fn(&'a u64) -> &'a u64 {identity::<u64>}>, {closure@$DIR/issue-30786.rs:131:30: 131:37}>: Stream`
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`&'a mut &mut Filter<Map<Repeat, for<'a> fn(&'a u64) -> &'a u64 {identity::<u64>}>, {closure@$DIR/issue-30786.rs:131:30: 131:37}>: Stream`
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`&'a mut Filter<Map<Repeat, for<'a> fn(&'a u64) -> &'a u64 {identity::<u64>}>, {closure@$DIR/issue-30786.rs:131:30: 131:37}>: Stream`
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--> $DIR/issue-30786.rs:98:50
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LL | impl<T> StreamExt for T where for<'a> &'a mut T: Stream {}
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| --------- - ^^^^^^ unsatisfied trait bound introduced here
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= help: items from traits can only be used if the trait is implemented and in scope
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note: `StreamExt` defines an item `countx`, perhaps you need to implement it
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--> $DIR/issue-30786.rs:66:1
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LL | pub trait StreamExt
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| ^^^^^^^^^^^^^^^^^^^
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error: aborting due to 2 previous errors
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For more information about this error, try `rustc --explain E0599`.
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