Rollup merge of #71220 - cuviper:std_or_patterns, r=Mark-Simulacrum

Dogfood or_patterns in the standard library

We can start using `or_patterns` in the standard library as a step toward stabilization.

cc #54883 @Centril

2 files changed, 2 insertions, 6 deletions

diff --git a/src/liballoc/collections/btree/map.rs b/src/liballoc/collections/btree/map.rs
index 3fc1b5e16b3..38196b2d4b4 100644
--- a/src/liballoc/collections/btree/map.rs
+++ b/src/liballoc/collections/btree/map.rs
@@ -2058,12 +2058,7 @@ where
         (Excluded(s), Excluded(e)) if s == e => {
             panic!("range start and end are equal and excluded in BTreeMap")
         }
-        (Included(s), Included(e))
-        | (Included(s), Excluded(e))
-        | (Excluded(s), Included(e))
-        | (Excluded(s), Excluded(e))
-            if s > e =>
-        {
+        (Included(s) | Excluded(s), Included(e) | Excluded(e)) if s > e => {
             panic!("range start is greater than range end in BTreeMap")
         }
         _ => {}
diff --git a/src/liballoc/lib.rs b/src/liballoc/lib.rs
index 121c1cde548..a2071844d5d 100644
--- a/src/liballoc/lib.rs
+++ b/src/liballoc/lib.rs
@@ -103,6 +103,7 @@
 #![feature(new_uninit)]
 #![feature(nll)]
 #![feature(optin_builtin_traits)]
+#![feature(or_patterns)]
 #![feature(pattern)]
 #![feature(ptr_internals)]
 #![feature(ptr_offset_from)]