-#define PP_CAT(x,y) PP_CAT__(x,y)
-#define PP_CAT__(x,y) x ## y
-
+#define PP_CAT(x,y) PP_CAT__(x,y)
+#define PP_CAT__(x,y) x ## y
+#define PP_CAT3(x,y,z) PP_CAT(PP_CAT(x,y),z)
+#define PP_CAT4(x,y,z,w) PP_CAT(PP_CAT3(x,y,z),w)
+#define PP_CAT5(x,y,z,w,j) PP_CAT(PP_CAT4(x,y,z,w),j)
+
+/*! String-ize a token (allowing macros to expand) */
+#define PP_STRINGIZE(x) PP_STRINGIZE__(x)
+#define PP_STRINGIZE__(x) #x
+
+/*! Issue a compilation error if the \a condition is false */
+#define STATIC_ASSERT(condition) \
+ extern char CT_ASSERT___[(condition) ? 1 : -1]