Vendor dependencies for 0.3.0 release

vendor/bevy_scene/src/reflect_utils.rs

@@ -0,0 +1,25 @@
+use bevy_reflect::{PartialReflect, ReflectFromReflect, TypeRegistration};
+
+/// Attempts to clone a [`PartialReflect`] value using various methods.
+///
+/// This first attempts to clone via [`PartialReflect::reflect_clone`].
+/// then falls back to [`ReflectFromReflect::from_reflect`],
+/// and finally [`PartialReflect::to_dynamic`] if the first two methods fail.
+///
+/// This helps ensure that the original type and type data is retained,
+/// and only returning a dynamic type if all other methods fail.
+pub(super) fn clone_reflect_value(
+    value: &dyn PartialReflect,
+    type_registration: &TypeRegistration,
+) -> Box<dyn PartialReflect> {
+    value
+        .reflect_clone()
+        .map(PartialReflect::into_partial_reflect)
+        .unwrap_or_else(|_| {
+            type_registration
+                .data::<ReflectFromReflect>()
+                .and_then(|fr| fr.from_reflect(value.as_partial_reflect()))
+                .map(PartialReflect::into_partial_reflect)
+                .unwrap_or_else(|| value.to_dynamic())
+        })
+}