Add extra impls for HasRawWindowHandle

CHANGELOG.md

@@ -1,6 +1,10 @@
 # Changelog
 
-## 0.4.0 (?)
+## 0.4.1 (?)
+
+* Added an impl of `HasRawWindowHandle` for `&T`, `Rc<T>`, and `Arc<T>`.
+
+## 0.4.0 (2021-11-15)
 
 * **Breaking:** Remove `_do_not_use` tags to use `#[non_exhaustive]` macro
 * **Breaking:** `RawWindowHandle` variants are no longer cfg-guarded by platform. 

src/lib.rs

@@ -18,6 +18,8 @@
 //! be used along with the struct update syntax to construct it. See each specific struct for
 //! examples.
 
+extern crate alloc;
+
 mod android;
 mod appkit;
 mod redox;
@@ -52,6 +54,22 @@ pub unsafe trait HasRawWindowHandle {
     fn raw_window_handle(&self) -> RawWindowHandle;
 }
 
+unsafe impl<'a, T: HasRawWindowHandle> HasRawWindowHandle for &'a T {
+    fn raw_window_handle(&self) -> RawWindowHandle {
+        (*self).raw_window_handle()
+    }
+}
+unsafe impl<T: HasRawWindowHandle> HasRawWindowHandle for alloc::rc::Rc<T> {
+    fn raw_window_handle(&self) -> RawWindowHandle {
+        (**self).raw_window_handle()
+    }
+}
+unsafe impl<T: HasRawWindowHandle> HasRawWindowHandle for alloc::sync::Arc<T> {
+    fn raw_window_handle(&self) -> RawWindowHandle {
+        (**self).raw_window_handle()
+    }
+}
+
 /// An enum to simply combine the different possible raw window handle variants.
 ///
 /// # Variant Availability
@@ -130,4 +148,3 @@ pub enum RawWindowHandle {
     /// This variant is used on Android targets.
     AndroidNdk(AndroidNdkHandle),
 }
-