Make slice::is_sorted_by impl nicer

WaffleLapkin · WaffleLapkin · commit 0d53565b60c5 · 2023-03-17T18:04:56.000Z
diff --git a/library/core/src/slice/iter.rs b/library/core/src/slice/iter.rs
@@ -132,9 +132,7 @@ iterator! {struct Iter -> *const T, &'a T, const, {/* no mut */}, {
         Self: Sized,
         F: FnMut(&Self::Item, &Self::Item) -> Option<Ordering>,
     {
-        self.as_slice().windows(2).all(|w| {
-            compare(&&w[0], &&w[1]).map(|o| o != Ordering::Greater).unwrap_or(false)
-        })
+        self.as_slice().array_windows().all(|[a, b]| compare(&a, &b).map_or(false, Ordering::is_le))
     }
 }}
 

Original file line number	Diff line number	Diff line change
`@@ -132,9 +132,7 @@ iterator! {struct Iter -> const T, &'a T, const, {/ no mut */}, {`
`132`	`132`	`Self: Sized,`
`133`	`133`	`F: FnMut(&Self::Item, &Self::Item) -> Option<Ordering>,`
`134`	`134`	`{`
`135`		`- self.as_slice().windows(2).all(\|w\| {`
`136`		`- compare(&&w[0], &&w[1]).map(\|o\| o != Ordering::Greater).unwrap_or(false)`
`137`		`- })`
	`135`	`+ self.as_slice().array_windows().all(\|[a, b]\| compare(&a, &b).map_or(false, Ordering::is_le))`
`138`	`136`	`}`
`139`	`137`	`}}`
`140`	`138`