From e6687c5fa8337a9cb78cc811960de520d1dbe5cf Mon Sep 17 00:00:00 2001
From: Simon Giesecke <sgiesecke@mozilla.com>
Date: Tue, 5 May 2020 10:42:23 +0000
Subject: [PATCH] style: Improve handling of copying arrays in layout/style/
 and servo/.

Differential Revision: https://phabricator.services.mozilla.com/D72351
---
 .../style/gecko_bindings/sugar/ns_t_array.rs      | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/components/style/gecko_bindings/sugar/ns_t_array.rs b/components/style/gecko_bindings/sugar/ns_t_array.rs
index e3d4e5b86bd..04ba326c615 100644
--- a/components/style/gecko_bindings/sugar/ns_t_array.rs
+++ b/components/style/gecko_bindings/sugar/ns_t_array.rs
@@ -5,7 +5,7 @@
 //! Rust helpers for Gecko's nsTArray.
 
 use crate::gecko_bindings::bindings;
-use crate::gecko_bindings::structs::{nsTArray, nsTArrayHeader};
+use crate::gecko_bindings::structs::{nsTArray, nsTArrayHeader, CopyableTArray};
 use std::mem;
 use std::ops::{Deref, DerefMut};
 use std::slice;
@@ -128,3 +128,16 @@ impl<T> nsTArray<T> {
         self.iter_mut().zip(iter).for_each(|(r, v)| *r = v);
     }
 }
+
+impl<T> Deref for CopyableTArray<T> {
+    type Target = nsTArray<T>;
+    fn deref(&self) -> &Self::Target {
+        &self._base
+    }
+}
+
+impl<T> DerefMut for CopyableTArray<T> {
+    fn deref_mut(&mut self) -> &mut nsTArray<T> {
+        &mut self._base
+    }
+}