Forward declarations for enums in SceneGraph.

src/SceneGraph/AbstractCamera.h

@@ -32,7 +32,7 @@ namespace Magnum { namespace SceneGraph {
 
 @see AbstractCamera::setAspectRatioPolicy()
 */
-enum class AspectRatioPolicy {
+enum class AspectRatioPolicy: std::uint8_t {
     NotPreserved,   /**< Don't preserve aspect ratio (default) */
     Extend,         /**< Extend on larger side of view */
     Clip            /**< Clip on smaller side of view */

src/SceneGraph/SceneGraph.h

@@ -25,6 +25,8 @@
 
 namespace Magnum { namespace SceneGraph {
 
+enum class AspectRatioPolicy: std::uint8_t;
+
 template<std::uint8_t dimensions, class T = GLfloat> class AbstractCamera;
 #ifndef MAGNUM_GCC46_COMPATIBILITY
 template<class T = GLfloat> using AbstractCamera2D = AbstractCamera<2, T>;
@@ -49,6 +51,8 @@ template<class T = GLfloat> using AbstractObject2D = AbstractObject<2, T>;
 template<class T = GLfloat> using AbstractObject3D = AbstractObject<3, T>;
 #endif
 
+enum class TransformationType: std::uint8_t;
+
 template<std::uint8_t dimensions, class T = GLfloat> class AbstractTransformation;
 #ifndef MAGNUM_GCC46_COMPATIBILITY
 template<class T = GLfloat> using AbstractTransformation2D = AbstractTransformation<2, T>;