Vendor dependencies for 0.3.0 release

vendor/windows-core-0.58.0/src/as_impl.rs

@@ -0,0 +1,20 @@
+/// A trait for retrieving the implementation behind a COM or WinRT interface.
+///
+/// This trait is automatically implemented when using the `implement` macro.
+pub trait AsImpl<T> {
+    /// # Safety
+    ///
+    /// The caller needs to ensure that `self` is actually implemented by the
+    /// implementation `T`.
+    unsafe fn as_impl(&self) -> &T {
+        self.as_impl_ptr().as_ref()
+    }
+
+    /// Returns a pointer to the implementation object.
+    ///
+    /// # Safety
+    ///
+    /// The caller needs to ensure that `self` is actually implemented by the
+    /// implementation `T`.
+    unsafe fn as_impl_ptr(&self) -> core::ptr::NonNull<T>;
+}