Changeset 6452 for code/branches/consolecommands2/src/libraries/util

Timestamp:

Jan 20, 2010, 2:21:10 PM (15 years ago)

Author:

landauf

Message:

merged current state of the new cc system to the updated branch

Location:

code/branches/consolecommands2/src/libraries/util

Files:

• Convert.h (modified) (1 diff)
• VA_NARGS.h (added)

code/branches/consolecommands2/src/libraries/util/Convert.h

@@ -115 +115 @@
         }
     };
+
+    ////////////
+    // upcast //
+    ////////////
+    namespace detail
+    {
+        // perform a static cast if ToType is a base of FromType
+        template<class ToType, class FromType>
+        FORCEINLINE ToType upcast(FromType input, detail::Int2Type<true>)
+        {
+            return static_cast<ToType>(input);
+        }
+
+        // return zero if ToType is not a base of FromType
+        template<class ToType, class FromType>
+        FORCEINLINE ToType upcast(FromType input, detail::Int2Type<false>)
+        {
+            return 0;
+        }
+    }
+
+    // performs an upcast if ToType is a base of FromType, returns zero otherwise
+    template <class ToType, class FromType>
+    FORCEINLINE ToType upcast(FromType input)
+    {
+        enum { probe = ImplicitConversion<FromType, ToType>::exists };
+        return detail::upcast<ToType, FromType>(input, detail::Int2Type<probe>());
+    }
 }