From 2a3d02d217706fe61b347b18fe6cc70feffbde01 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20Vondru=C5=A1?= <mosra@centrum.cz>
Date: Thu, 5 Sep 2019 19:17:15 +0200
Subject: [PATCH] Math: an attempt to fix scatter() on GCC 4.8.

---
 src/Magnum/Math/Swizzle.h | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/Magnum/Math/Swizzle.h b/src/Magnum/Math/Swizzle.h
index 16f0b28aa..d67b8bbd6 100644
--- a/src/Magnum/Math/Swizzle.h
+++ b/src/Magnum/Math/Swizzle.h
@@ -140,7 +140,14 @@ Inverse to @ref gather(), supporting the same component addressing except for
 @see @ref matrix-vector-component-access, @ref Vector4::xyz(),
     @ref Vector4::rgb(), @ref Vector4::xy(), @ref Vector3::xy()
 */
-template<char ...components, class T> constexpr T scatter(const T& vector, const Vector<sizeof...(components), typename T::Type>& values) {
+#ifdef DOXYGEN_GENERATING_OUTPUT
+template<char ...components, class T> constexpr T scatter(const T& vector, const Vector<sizeof...(components), typename T::Type>& values)
+#else
+/* Using std::common_type otherwise GCC 4.8 fails to match the arguments
+   in SwizzleTest::scatterOneComponent() */
+template<char ...components, class T> constexpr T scatter(const T& vector, const typename std::common_type<Vector<sizeof...(components), typename T::Type>>::type& values)
+#endif
+{
     return Implementation::scatterRecursive<T, sizeof...(components), components...>(vector, values, 0);
 }