Rollup merge of rust-lang#100006 - jyn514:update-copy, r=dtolnay

matthiaskrgr · web-flow · commit 22e320b2c9b6 · 2022-10-30T00:09:23.000+02:00
Make `core::mem::copy` const cc rust-lang#98262, rust-lang/libs-team#78
diff --git a/library/core/src/mem/mod.rs b/library/core/src/mem/mod.rs
@@ -1004,7 +1004,7 @@ pub fn drop<T>(_x: T) {}
 /// ```
 #[inline]
 #[unstable(feature = "mem_copy_fn", issue = "98262")]
-pub fn copy<T: Copy>(x: &T) -> T {
+pub const fn copy<T: Copy>(x: &T) -> T {
     *x
 }
 

Original file line number	Diff line number	Diff line change
`@@ -1004,7 +1004,7 @@ pub fn drop<T>(_x: T) {}`
`1004`	`1004`	/// ```
`1005`	`1005`	`#[inline]`
`1006`	`1006`	`#[unstable(feature = "mem_copy_fn", issue = "98262")]`
`1007`		`-pub fn copy<T: Copy>(x: &T) -> T {`
	`1007`	`+pub const fn copy<T: Copy>(x: &T) -> T {`
`1008`	`1008`	`*x`
`1009`	`1009`	`}`
`1010`	`1010`