9. Edge iterators

9.1. igraph_eit_create — Creates an edge iterator from an edge selector.
9.2. igraph_eit_destroy — Destroys an edge iterator
9.3. Stepping over the edges
9.4. IGRAPH_EIT_NEXT — Next edge.
9.5. IGRAPH_EIT_END — Are we at the end?
9.6. IGRAPH_EIT_SIZE — Number of edges in the iterator.
9.7. IGRAPH_EIT_RESET — Reset an edge iterator.
9.8. IGRAPH_EIT_GET — Query an edge iterator.