Add Id::cast

madsmtm · madsmtm · commit 434f46d706a1 · 2022-03-01T01:34:29.000+01:00
diff --git a/objc2/src/rc/id.rs b/objc2/src/rc/id.rs
@@ -379,6 +379,14 @@ impl<T: Message + ?Sized> Id<T, Unknown> {
         let ptr = ManuallyDrop::new(self).ptr;
         unsafe { Id::new(ptr) }
     }
+
+    #[inline]
+    // TODO: Can we make this safe?
+    pub unsafe fn cast<U: Message>(self) -> Id<U, Unknown> {
+        // Can't use `NonNull::cast` yet
+        let ptr = ManuallyDrop::new(self).ptr.cast();
+        unsafe { Id::new(ptr) }
+    }
 }
 
 impl<T: Message> Id<T, Unknown> {

Original file line number	Diff line number	Diff line change
`@@ -379,6 +379,14 @@ impl<T: Message + ?Sized> Id<T, Unknown> {`
`379`	`379`	`let ptr = ManuallyDrop::new(self).ptr;`
`380`	`380`	`unsafe { Id::new(ptr) }`
`381`	`381`	`}`
	`382`	`+`
	`383`	`+ #[inline]`
	`384`	`+ // TODO: Can we make this safe?`
	`385`	`+ pub unsafe fn cast<U: Message>(self) -> Id<U, Unknown> {`
	`386`	+ // Can't use `NonNull::cast` yet
	`387`	`+ let ptr = ManuallyDrop::new(self).ptr.cast();`
	`388`	`+ unsafe { Id::new(ptr) }`
	`389`	`+ }`
`382`	`390`	`}`
`383`	`391`
`384`	`392`	`impl<T: Message> Id<T, Unknown> {`