From 51cc13a0f46d517dc363dfb0d032f4d543887c22 Mon Sep 17 00:00:00 2001
From: mitchmindtree <mitchell.nordine@gmail.com>
Date: Fri, 30 Nov 2018 10:14:43 +0700
Subject: [PATCH] Add a `union` method to the extensions types. (#1125)

Add a `union` method to the extensions types.
---
 CHANGELOG_VULKANO.md      |  1 +
 vulkano/src/extensions.rs | 11 +++++++++++
 2 files changed, 12 insertions(+)

diff --git a/CHANGELOG_VULKANO.md b/CHANGELOG_VULKANO.md
index 67abf86c..635dbae9 100644
--- a/CHANGELOG_VULKANO.md
+++ b/CHANGELOG_VULKANO.md
@@ -2,6 +2,7 @@
 
 - Add support for `#include "..."` and `#include <...>` directives within source
   files.
+- Add a `union` method for the extensions types.
 
 # Version 0.11.1 (2018-11-16)
 
diff --git a/vulkano/src/extensions.rs b/vulkano/src/extensions.rs
index 5b40e15c..302fc198 100644
--- a/vulkano/src/extensions.rs
+++ b/vulkano/src/extensions.rs
@@ -42,6 +42,17 @@ macro_rules! extensions {
                 }
             }
 
+            /// Returns the union of this list and another list.
+            #[inline]
+            pub fn union(&self, other: &$sname) -> $sname {
+                $sname {
+                    $(
+                        $ext: self.$ext || other.$ext,
+                    )*
+                    _unbuildable: Unbuildable(())
+                }
+            }
+
             /// Returns the intersection of this list and another list.
             #[inline]
             pub fn intersection(&self, other: &$sname) -> $sname {