#define Elements(x) (sizeof(x)/sizeof(*(x)))
#endif
-
+#ifdef __cplusplus
+/**
+ * Macro function that evaluates to true if T is a trivially
+ * destructible type -- that is, if its (non-virtual) destructor
+ * performs no action and all member variables and base classes are
+ * trivially destructible themselves.
+ */
+# if defined(__GNUC__)
+# if ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 3)))
+# define HAS_TRIVIAL_DESTRUCTOR(T) __has_trivial_destructor(T)
+# endif
+# elif (defined(__clang__) && defined(__has_feature))
+# if __has_feature(has_trivial_destructor)
+# define HAS_TRIVIAL_DESTRUCTOR(T) __has_trivial_destructor(T)
+# endif
+# endif
+# ifndef HAS_TRIVIAL_DESTRUCTOR
+ /* It's always safe (if inefficient) to assume that a
+ * destructor is non-trivial.
+ */
+# define HAS_TRIVIAL_DESTRUCTOR(T) (false)
+# endif
+#endif
#ifdef __cplusplus
}