Changeset 11002 for code/branches/cpp11_v2/src/libraries/util/Math.h

Timestamp:

Dec 30, 2015, 9:13:14 PM (9 years ago)

Author:

landauf

Message:

MultiType now supports strongly typed enum classes. Their values are cast to the underlying type.
MultiType now also uses additional static_asserts to ensure that it is only used with supported values.

File:

• code/branches/cpp11_v2/src/libraries/util/Math.h (modified) (2 diffs)

code/branches/cpp11_v2/src/libraries/util/Math.h

@@ -47 +47 @@
 #include <cstdlib>
 #include <random>
+#include <type_traits>
 
 #include <OgreMath.h>
@@ -178 +179 @@
         @c Vector3 you get <tt>Vector3(0, 0, 0)</tt>.
     */
-    template <typename T>
-    inline T zeroise()
+    template <typename T> /* for normal classes */ typename std::enable_if<!std::is_enum<T>::value, T>::type
+    inline /*T*/ zeroise()
     {
         // If you reach this code, you abused zeroise()!
         static_assert(sizeof(T) != sizeof(T), "No template specialization available for T");
+    }
+    /// Implementation for enum classes: uses the underlying type to create a zero value.
+    template <typename T> /* for enum classes */ typename std::enable_if<std::is_enum<T>::value, T>::type
+    inline /*T*/ zeroise()
+    {
+        return static_cast<T>(zeroise<typename std::underlying_type<T>::type>());
     }