Rollup merge of #102977 - lukas-code:is-sorted-hrtb, r=m-ou-se

remove HRTB from `[T]::is_sorted_by{,_key}`

Changes the signature of `[T]::is_sorted_by{,_key}` to match `[T]::binary_search_by{,_key}` and make code like https://github.com/rust-lang/rust/issues/53485#issuecomment-885393452 compile.

Tracking issue: https://github.com/rust-lang/rust/issues/53485

~~Do we need an ACP for something like this?~~ Edit: Filed ACP here: https://github.com/rust-lang/libs-team/issues/121

1 files changed, 20 insertions, 0 deletions

diff --git a/src/test/ui/array-slice-vec/slice_is_sorted_by_borrow.rs b/src/test/ui/array-slice-vec/slice_is_sorted_by_borrow.rs
new file mode 100644
index 00000000000..073280d0fab
--- /dev/null
+++ b/src/test/ui/array-slice-vec/slice_is_sorted_by_borrow.rs
@@ -0,0 +1,20 @@
+// check-pass
+// regression test for https://github.com/rust-lang/rust/issues/53485#issuecomment-885393452
+
+#![feature(is_sorted)]
+
+struct A {
+    name: String,
+}
+
+fn main() {
+    let a = &[
+        A {
+            name: "1".to_string(),
+        },
+        A {
+            name: "2".to_string(),
+        },
+    ];
+    assert!(a.is_sorted_by_key(|a| a.name.as_str()));
+}