Add more information link to orphan impls

compiler/rustc_hir_analysis/messages.ftl

@@ -351,7 +351,9 @@ hir_analysis_only_current_traits_arbitrary = only traits defined in the current
 
 hir_analysis_only_current_traits_foreign = this is not defined in the current crate because this is a foreign trait
 
-hir_analysis_only_current_traits_label = impl doesn't use any uncovered types from inside the current crate
+hir_analysis_only_current_traits_label = impl doesn't have any local type before any uncovered type parameters
+
+hir_analysis_only_current_traits_label_more_info = for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
 
 hir_analysis_only_current_traits_name = this is not defined in the current crate because {$name} are always foreign
 

compiler/rustc_hir_analysis/src/errors.rs

@@ -1441,6 +1441,7 @@ pub enum OnlyCurrentTraits {
     Outside {
         #[primary_span]
         #[label(hir_analysis_only_current_traits_label)]
+        #[label(hir_analysis_only_current_traits_label_more_info)]
         span: Span,
         #[note(hir_analysis_only_current_traits_note)]
         note: (),
@@ -1449,6 +1450,7 @@ pub enum OnlyCurrentTraits {
     Primitive {
         #[primary_span]
         #[label(hir_analysis_only_current_traits_label)]
+        #[label(hir_analysis_only_current_traits_label_more_info)]
         span: Span,
         #[note(hir_analysis_only_current_traits_note)]
         note: (),
@@ -1457,6 +1459,7 @@ pub enum OnlyCurrentTraits {
     Arbitrary {
         #[primary_span]
         #[label(hir_analysis_only_current_traits_label)]
+        #[label(hir_analysis_only_current_traits_label_more_info)]
         span: Span,
         #[note(hir_analysis_only_current_traits_note)]
         note: (),

tests/ui/coherence/coherence-cow.re_a.stderr

@@ -5,7 +5,8 @@ LL | impl<T> Remote for Pair<T,Cover<T>> { }
    | ^^^^^^^^^^^^^^^^^^^----------------
    | |                  |
    | |                  `Pair` is not defined in the current crate
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 

tests/ui/coherence/coherence-cow.re_b.stderr

@@ -5,7 +5,8 @@ LL | impl<T> Remote for Pair<Cover<T>,T> { }
    | ^^^^^^^^^^^^^^^^^^^----------------
    | |                  |
    | |                  `Pair` is not defined in the current crate
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 

tests/ui/coherence/coherence-cow.re_c.stderr

@@ -5,7 +5,8 @@ LL | impl<T,U> Remote for Pair<Cover<T>,U> { }
    | ^^^^^^^^^^^^^^^^^^^^^----------------
    | |                    |
    | |                    `Pair` is not defined in the current crate
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 

tests/ui/coherence/coherence-fundamental-trait-objects.stderr

@@ -5,7 +5,8 @@ LL | impl Misc for dyn Fundamental<Local> {}
    | ^^^^^^^^^^^^^^----------------------
    | |             |
    | |             `dyn Fundamental<Local>` is not defined in the current crate
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 

tests/ui/coherence/coherence-impl-trait-for-marker-trait-negative.stderr

@@ -41,7 +41,8 @@ LL | impl !Send for dyn Marker2 {}
    | ^^^^^^^^^^^^^^^-----------
    | |              |
    | |              `dyn Marker2` is not defined in the current crate
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 

tests/ui/coherence/coherence-impl-trait-for-marker-trait-positive.stderr

@@ -41,7 +41,8 @@ LL | unsafe impl Send for dyn Marker2 {}
    | ^^^^^^^^^^^^^^^^^^^^^-----------
    | |                    |
    | |                    `dyn Marker2` is not defined in the current crate
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 

tests/ui/coherence/coherence-impls-copy.stderr

@@ -15,7 +15,8 @@ LL | impl Copy for &'static [NotSync] {}
    | ^^^^^^^^^^^^^^------------------
    | |             |
    | |             this is not defined in the current crate because slices are always foreign
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 
@@ -26,7 +27,8 @@ LL | impl Copy for i32 {}
    | ^^^^^^^^^^^^^^---
    | |             |
    | |             `i32` is not defined in the current crate
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 
@@ -43,7 +45,8 @@ LL | impl Copy for (MyType, MyType) {}
    | ^^^^^^^^^^^^^^----------------
    | |             |
    | |             this is not defined in the current crate because tuples are always foreign
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 
@@ -60,7 +63,8 @@ LL | impl Copy for [MyType] {}
    | ^^^^^^^^^^^^^^--------
    | |             |
    | |             this is not defined in the current crate because slices are always foreign
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 

tests/ui/coherence/coherence-impls-send.stderr

@@ -5,7 +5,8 @@ LL | unsafe impl Send for &'static [NotSync] {}
    | ^^^^^^^^^^^^^^^^^^^^^------------------
    | |                    |
    | |                    this is not defined in the current crate because slices are always foreign
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 
@@ -16,7 +17,8 @@ LL | unsafe impl Send for (MyType, MyType) {}
    | ^^^^^^^^^^^^^^^^^^^^^----------------
    | |                    |
    | |                    this is not defined in the current crate because tuples are always foreign
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 
@@ -33,7 +35,8 @@ LL | unsafe impl Send for [MyType] {}
    | ^^^^^^^^^^^^^^^^^^^^^--------
    | |                    |
    | |                    this is not defined in the current crate because slices are always foreign
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 

tests/ui/coherence/coherence-impls-sized.stderr

@@ -23,7 +23,8 @@ LL | impl Sized for (MyType, MyType) {}
    | ^^^^^^^^^^^^^^^----------------
    | |              |
    | |              this is not defined in the current crate because tuples are always foreign
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 
@@ -46,7 +47,8 @@ LL | impl Sized for [MyType] {}
    | ^^^^^^^^^^^^^^^--------
    | |              |
    | |              this is not defined in the current crate because slices are always foreign
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 
@@ -63,7 +65,8 @@ LL | impl Sized for &'static [NotSync] {}
    | ^^^^^^^^^^^^^^^------------------
    | |              |
    | |              this is not defined in the current crate because slices are always foreign
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 

tests/ui/coherence/coherence-negative-impls-copy-bad.stderr

@@ -5,7 +5,8 @@ LL | impl !Copy for str {}
    | ^^^^^^^^^^^^^^^---
    | |              |
    | |              `str` is not defined in the current crate
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 
@@ -16,7 +17,8 @@ LL | impl !Copy for fn() {}
    | ^^^^^^^^^^^^^^^----
    | |              |
    | |              `fn()` is not defined in the current crate
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 
@@ -27,7 +29,8 @@ LL | impl !Copy for () {}
    | ^^^^^^^^^^^^^^^--
    | |              |
    | |              this is not defined in the current crate because tuples are always foreign
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 

tests/ui/coherence/coherence-orphan.stderr

@@ -6,7 +6,8 @@ LL | impl TheTrait<usize> for isize {}
    | |    |                   |
    | |    |                   `isize` is not defined in the current crate
    | |    `usize` is not defined in the current crate
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 
@@ -17,7 +18,8 @@ LL | impl !Send for Vec<isize> {}
    | ^^^^^^^^^^^^^^^----------
    | |              |
    | |              `Vec` is not defined in the current crate
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 

tests/ui/coherence/coherence-overlapping-pairs.stderr

@@ -5,7 +5,8 @@ LL | impl<T> Remote for lib::Pair<T,Foo> { }
    | ^^^^^^^^^^^^^^^^^^^----------------
    | |                  |
    | |                  `Pair` is not defined in the current crate
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 

tests/ui/coherence/coherence-pair-covered-uncovered-1.stderr

@@ -6,7 +6,8 @@ LL | impl<T, U> Remote1<Pair<T, Local<U>>> for i32 { }
    | |          |                              |
    | |          |                              `i32` is not defined in the current crate
    | |          `Pair` is not defined in the current crate
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 

tests/ui/coherence/coherence-pair-covered-uncovered.stderr

@@ -5,7 +5,8 @@ LL | impl<T,U> Remote for Pair<T,Local<U>> { }
    | ^^^^^^^^^^^^^^^^^^^^^----------------
    | |                    |
    | |                    `Pair` is not defined in the current crate
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 

tests/ui/coherence/coherence-vec-local-2.stderr

@@ -5,7 +5,8 @@ LL | impl<T> Remote for Vec<Local<T>> { }
    | ^^^^^^^^^^^^^^^^^^^-------------
    | |                  |
    | |                  `Vec` is not defined in the current crate
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 

tests/ui/coherence/coherence-vec-local.stderr

@@ -5,7 +5,8 @@ LL | impl Remote for Vec<Local> { }
    | ^^^^^^^^^^^^^^^^----------
    | |               |
    | |               `Vec` is not defined in the current crate
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 

tests/ui/coherence/coherence_local_err_struct.stderr

@@ -5,7 +5,8 @@ LL | impl lib::MyCopy for lib::MyStruct<MyType> { }
    | ^^^^^^^^^^^^^^^^^^^^^---------------------
    | |                    |
    | |                    `MyStruct` is not defined in the current crate
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 

tests/ui/coherence/coherence_local_err_tuple.stderr

@@ -5,7 +5,8 @@ LL | impl lib::MyCopy for (MyType,) { }
    | ^^^^^^^^^^^^^^^^^^^^^---------
    | |                    |
    | |                    this is not defined in the current crate because tuples are always foreign
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 

tests/ui/coherence/impl-foreign-for-foreign.stderr

@@ -5,7 +5,8 @@ LL | impl Remote for i32 {
    | ^^^^^^^^^^^^^^^^---
    | |               |
    | |               `i32` is not defined in the current crate
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 

tests/ui/coherence/impl-foreign-for-foreign[foreign].stderr

@@ -6,7 +6,8 @@ LL | impl Remote1<Rc<i32>> for i32 {
    | |    |                    |
    | |    |                    `i32` is not defined in the current crate
    | |    `Rc` is not defined in the current crate
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 
@@ -18,7 +19,8 @@ LL | impl Remote1<Rc<Local>> for f64 {
    | |    |                      |
    | |    |                      `f64` is not defined in the current crate
    | |    `Rc` is not defined in the current crate
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 
@@ -30,7 +32,8 @@ LL | impl<T> Remote1<Rc<T>> for f32 {
    | |       |                  |
    | |       |                  `f32` is not defined in the current crate
    | |       `Rc` is not defined in the current crate
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 

tests/ui/coherence/impl-foreign-for-fundamental[foreign].stderr

@@ -6,7 +6,8 @@ LL | impl Remote for Box<i32> {
    | |    |          |
    | |    |          `i32` is not defined in the current crate
    | |    `std::alloc::Global` is not defined in the current crate
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 
@@ -18,7 +19,8 @@ LL | impl<T> Remote for Box<Rc<T>> {
    | |       |          |
    | |       |          `Rc` is not defined in the current crate
    | |       `std::alloc::Global` is not defined in the current crate
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead
 

tests/ui/coherence/impl-foreign[foreign]-for-foreign.stderr

@@ -6,7 +6,8 @@ LL | impl Remote1<u32> for f64 {
    | |    |                |
    | |    |                `f64` is not defined in the current crate
    | |    `u32` is not defined in the current crate
-   | impl doesn't use any uncovered types from inside the current crate
+   | impl doesn't have any local type before any uncovered type parameters
+   | for more information see https://doc.rust-lang.org/reference/items/implementations.html#orphan-rules
    |
    = note: define and implement a trait or new type instead