+/* Convenience macros used for retrieving the debug info. All of them
+ * need a `direction` variable accessible at the call site.
+ */
+#define DYNAMIC_MACRO_CURRENT_SLOT() (direction > 0 ? 1 : 2)
+#define DYNAMIC_MACRO_CURRENT_LENGTH(BEGIN, POINTER) \
+ ((int)(direction * ((POINTER) - (BEGIN))))
+#define DYNAMIC_MACRO_CURRENT_CAPACITY(BEGIN, END2) \
+ ((int)(direction * ((END2) - (BEGIN)) + 1))
+