+#ifdef _BE_IFG_USE_MACROS
+
+#define be_ifg_nodes_iter_size(self) ((self)->impl->nodes_iter_size)
+#define be_ifg_neighbours_iter_size(self) ((self)->impl->neighbours_iter_size)
+
+#define be_ifg_free(self) ((self)->impl->free(self))
+#define be_ifg_connected(self,a,b) ((self)->impl->connected(self, a, b))
+#define be_ifg_neighbours_begin(self, iter, irn) ((self)->impl->neighbours_begin(self, iter, irn))
+#define be_ifg_neighbours_next(self, iter) ((self)->impl->neighbours_next(self, iter))
+#define be_ifg_neighbours_break(self, iter) ((self)->impl->neighbours_break(self, iter))
+#define be_ifg_nodes_begin(self, iter) ((self)->impl->nodes_begin(self, iter))
+#define be_ifg_nodes_next(self, iter) ((self)->impl->nodes_next(self, iter))
+#define be_ifg_nodes_break(self, iter) ((self)->impl->nodes_break(self, iter))
+#define be_ifg_degree(self,irn) ((self)->impl->degree(self, irn))
+
+#endif
+
+void be_ifg_check(const be_ifg_t *ifg);
+