Drop pointless as_slice call.

ijackson · dtolnay · ijackson · commit beb293d5dfeb · 2020-12-27T00:50:46.000Z
Co-authored-by: David Tolnay &lt;dtolnay@gmail.com&gt;
diff --git a/library/core/src/slice/mod.rs b/library/core/src/slice/mod.rs
@@ -1792,7 +1792,7 @@ impl<T> [T] {
     {
         // This function will need rewriting if and when SlicePattern becomes more sophisticated.
         let prefix = prefix.as_slice();
-        let n = prefix.as_slice().len();
+        let n = prefix.len();
         if n <= self.len() {
             let (head, tail) = self.split_at(n);
             if head == prefix {

Original file line number	Diff line number	Diff line change
`@@ -1792,7 +1792,7 @@ impl<T> [T] {`
`1792`	`1792`	`{`
`1793`	`1793`	`// This function will need rewriting if and when SlicePattern becomes more sophisticated.`
`1794`	`1794`	`let prefix = prefix.as_slice();`
`1795`		`- let n = prefix.as_slice().len();`
	`1795`	`+ let n = prefix.len();`
`1796`	`1796`	`if n <= self.len() {`
`1797`	`1797`	`let (head, tail) = self.split_at(n);`
`1798`	`1798`	`if head == prefix {`