+} // namespace insp
+
+// Intrusive list where the list only has a pointer to the head element
+#define INSPIRCD_INTRUSIVE_LIST_NAME intrusive_list
+#include "intrusive_list_impl.h"
+#undef INSPIRCD_INTRUSIVE_LIST_NAME
+
+// Intrusive list where the list maintains a pointer to both the head and the tail elements.
+// Additional methods: back(), push_back(), pop_back()
+#define INSPIRCD_INTRUSIVE_LIST_NAME intrusive_list_tail
+#define INSPIRCD_INTRUSIVE_LIST_HAS_TAIL