Rollup merge of rust-lang#77289 - TimDiekmann:alloc-ref-by-ref, r=Amanieu

Dylan-DPC · web-flow · commit a063e5e4d9ef · 2020-09-28T18:26:04.000+02:00
Change `AllocRef::by_ref` to take `&self` instead of `&mut self` r? @Amanieu
diff --git a/library/core/src/alloc/mod.rs b/library/core/src/alloc/mod.rs
@@ -337,7 +337,7 @@ pub unsafe trait AllocRef {
     ///
     /// The returned adaptor also implements `AllocRef` and will simply borrow this.
     #[inline(always)]
-    fn by_ref(&mut self) -> &Self {
+    fn by_ref(&self) -> &Self {
         self
     }
 }

Original file line number	Diff line number	Diff line change
`@@ -337,7 +337,7 @@ pub unsafe trait AllocRef {`
`337`	`337`	`///`
`338`	`338`	/// The returned adaptor also implements `AllocRef` and will simply borrow this.
`339`	`339`	`#[inline(always)]`
`340`		`- fn by_ref(&mut self) -> &Self {`
	`340`	`+ fn by_ref(&self) -> &Self {`
`341`	`341`	`self`
`342`	`342`	`}`
`343`	`343`	`}`