When suggesting associated fn with type parameters, include in the structured suggestion

src/test/ui/suggestions/missing-assoc-fn-applicable-suggestions.fixed

@@ -0,0 +1,21 @@
+// run-rustfix
+trait TraitB {
+    type Item;
+}
+
+trait TraitA<A> {
+    type Type;
+    fn bar<T>(_: T) -> Self;
+    fn baz<T>(_: T) -> Self where T: TraitB, <T as TraitB>::Item: Copy;
+}
+
+struct S;
+struct Type;
+
+impl TraitA<()> for S { //~ ERROR not all trait items implemented
+fn baz<T>(_: T) -> Self where T: TraitB, <T as TraitB>::Item: std::marker::Copy { unimplemented!() }
+fn bar<T>(_: T) -> Self { unimplemented!() }
+type Type = Type;
+}
+
+fn main() {}

src/test/ui/suggestions/missing-assoc-fn-applicable-suggestions.rs

@@ -0,0 +1,18 @@
+// run-rustfix
+trait TraitB {
+    type Item;
+}
+
+trait TraitA<A> {
+    type Type;
+    fn bar<T>(_: T) -> Self;
+    fn baz<T>(_: T) -> Self where T: TraitB, <T as TraitB>::Item: Copy;
+}
+
+struct S;
+struct Type;
+
+impl TraitA<()> for S { //~ ERROR not all trait items implemented
+}
+
+fn main() {}

src/test/ui/suggestions/missing-assoc-fn-applicable-suggestions.stderr

@@ -0,0 +1,16 @@
+error[E0046]: not all trait items implemented, missing: `Type`, `bar`, `baz`
+  --> $DIR/missing-assoc-fn-applicable-suggestions.rs:15:1
+   |
+LL |     type Type;
+   |     ---------- `Type` from trait
+LL |     fn bar<T>(_: T) -> Self;
+   |     ------------------------ `bar` from trait
+LL |     fn baz<T>(_: T) -> Self where T: TraitB, <T as TraitB>::Item: Copy;
+   |     ------------------------------------------------------------------- `baz` from trait
+...
+LL | impl TraitA<()> for S {
+   | ^^^^^^^^^^^^^^^^^^^^^ missing `Type`, `bar`, `baz` in implementation
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0046`.

src/test/ui/suggestions/missing-assoc-fn.rs

@@ -0,0 +1,22 @@
+trait TraitB {
+    type Item;
+}
+
+trait TraitA<A> {
+    fn foo<T: TraitB<Item = A>>(_: T) -> Self;
+    fn bar<T>(_: T) -> Self;
+    fn baz<T>(_: T) -> Self where T: TraitB, <T as TraitB>::Item: Copy;
+    fn bat<T: TraitB<Item: Copy>>(_: T) -> Self; //~ ERROR associated type bounds are unstable
+}
+
+struct S;
+
+impl TraitA<()> for S { //~ ERROR not all trait items implemented
+}
+
+use std::iter::FromIterator;
+struct X;
+impl FromIterator<()> for X { //~ ERROR not all trait items implemented
+}
+
+fn main() {}

src/test/ui/suggestions/missing-assoc-fn.stderr

@@ -0,0 +1,36 @@
+error[E0658]: associated type bounds are unstable
+  --> $DIR/missing-assoc-fn.rs:9:22
+   |
+LL |     fn bat<T: TraitB<Item: Copy>>(_: T) -> Self;
+   |                      ^^^^^^^^^^
+   |
+   = note: for more information, see https://github.com/rust-lang/rust/issues/52662
+   = help: add `#![feature(associated_type_bounds)]` to the crate attributes to enable
+
+error[E0046]: not all trait items implemented, missing: `foo`, `bar`, `baz`, `bat`
+  --> $DIR/missing-assoc-fn.rs:14:1
+   |
+LL |     fn foo<T: TraitB<Item = A>>(_: T) -> Self;
+   |     ------------------------------------------ `foo` from trait
+LL |     fn bar<T>(_: T) -> Self;
+   |     ------------------------ `bar` from trait
+LL |     fn baz<T>(_: T) -> Self where T: TraitB, <T as TraitB>::Item: Copy;
+   |     ------------------------------------------------------------------- `baz` from trait
+LL |     fn bat<T: TraitB<Item: Copy>>(_: T) -> Self;
+   |     -------------------------------------------- `bat` from trait
+...
+LL | impl TraitA<()> for S {
+   | ^^^^^^^^^^^^^^^^^^^^^ missing `foo`, `bar`, `baz`, `bat` in implementation
+
+error[E0046]: not all trait items implemented, missing: `from_iter`
+  --> $DIR/missing-assoc-fn.rs:19:1
+   |
+LL | impl FromIterator<()> for X {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ missing `from_iter` in implementation
+   |
+   = help: implement the missing item: `fn from_iter<T>(_: T) -> Self where T: std::iter::IntoIterator, std::iter::IntoIterator::Item = A { unimplemented!() }`
+
+error: aborting due to 3 previous errors
+
+Some errors have detailed explanations: E0046, E0658.
+For more information about an error, try `rustc --explain E0046`.