Auto merge of #126877 - GrigorenkoPV:clone_to_uninit, r=dtolnay

CloneToUninit impls

As per #126799.

Also implements it for `Wtf8` and both versions of `os_str::Slice`.

Maybe it is worth to slap `#[inline]` on some of those impls.

r? `@dtolnay`

1 files changed, 12 insertions, 0 deletions

diff --git a/library/std/src/path.rs b/library/std/src/path.rs
index 80163667636..9eaa0e01c2c 100644
--- a/library/std/src/path.rs
+++ b/library/std/src/path.rs
@@ -70,6 +70,8 @@
 #[cfg(test)]
 mod tests;
 
+use core::clone::CloneToUninit;
+
 use crate::borrow::{Borrow, Cow};
 use crate::collections::TryReserveError;
 use crate::error::Error;
@@ -3109,6 +3111,16 @@ impl Path {
     }
 }
 
+#[unstable(feature = "clone_to_uninit", issue = "126799")]
+unsafe impl CloneToUninit for Path {
+    #[inline]
+    #[cfg_attr(debug_assertions, track_caller)]
+    unsafe fn clone_to_uninit(&self, dst: *mut Self) {
+        // SAFETY: Path is just a wrapper around OsStr
+        unsafe { self.inner.clone_to_uninit(core::ptr::addr_of_mut!((*dst).inner)) }
+    }
+}
+
 #[stable(feature = "rust1", since = "1.0.0")]
 impl AsRef<OsStr> for Path {
     #[inline]