Add PartialEq<&B> for &A

Author: compiler-errors

tests/ui/rfcs/rfc-2632-const-trait-impl/effects/minicore.rs

@@ -344,6 +344,15 @@ trait PartialEq<Rhs: ?Sized = Self> {
     }
 }
 
+impl<A: ?Sized, B: ?Sized> PartialEq<&B> for &A
+where
+    A: PartialEq<B>,
+{
+    fn eq(&self, other: &&B) -> bool {
+        PartialEq::eq(*self, *other)
+    }
+}
+
 // FIXME(effects): again, this should not error without Rhs specified
 impl PartialEq<str> for str {
     fn eq(&self, other: &str) -> bool {

tests/ui/rfcs/rfc-2632-const-trait-impl/effects/minicore.stderr

@@ -1,24 +1,5 @@
-warning: to use a constant of type `&str` in a pattern, the type must implement `PartialEq`
-  --> $DIR/minicore.rs:332:9
-   |
-LL |         "true" => Ok(true),
-   |         ^^^^^^
-   |
-   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
-   = note: for more information, see issue #116122 <https://github.com/rust-lang/rust/issues/116122>
-   = note: `#[warn(const_patterns_without_partial_eq)]` on by default
-
-warning: to use a constant of type `&str` in a pattern, the type must implement `PartialEq`
-  --> $DIR/minicore.rs:333:9
-   |
-LL |         "false" => Ok(false),
-   |         ^^^^^^^
-   |
-   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
-   = note: for more information, see issue #116122 <https://github.com/rust-lang/rust/issues/116122>
-
 error[E0493]: destructor of `Self` cannot be evaluated at compile-time
-  --> $DIR/minicore.rs:494:9
+  --> $DIR/minicore.rs:503:9
    |
 LL |         *self = source.clone()
    |         ^^^^^
@@ -27,35 +8,13 @@ LL |         *self = source.clone()
    |         value is dropped here
 
 error[E0493]: destructor of `T` cannot be evaluated at compile-time
-  --> $DIR/minicore.rs:504:35
+  --> $DIR/minicore.rs:513:35
    |
 LL | const fn drop<T: ~const Destruct>(_: T) {}
    |                                   ^      - value is dropped here
    |                                   |
    |                                   the destructor for this type cannot be evaluated in constant functions
 
-error: aborting due to 2 previous errors; 2 warnings emitted
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0493`.
-Future incompatibility report: Future breakage diagnostic:
-warning: to use a constant of type `&str` in a pattern, the type must implement `PartialEq`
-  --> $DIR/minicore.rs:332:9
-   |
-LL |         "true" => Ok(true),
-   |         ^^^^^^
-   |
-   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
-   = note: for more information, see issue #116122 <https://github.com/rust-lang/rust/issues/116122>
-   = note: `#[warn(const_patterns_without_partial_eq)]` on by default
-
-Future breakage diagnostic:
-warning: to use a constant of type `&str` in a pattern, the type must implement `PartialEq`
-  --> $DIR/minicore.rs:333:9
-   |
-LL |         "false" => Ok(false),
-   |         ^^^^^^^
-   |
-   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
-   = note: for more information, see issue #116122 <https://github.com/rust-lang/rust/issues/116122>
-   = note: `#[warn(const_patterns_without_partial_eq)]` on by default
-