I am trying to use an adjacency list with bundled properties. So I type my graph data stucture as so: struct MyV { int numOnVertex; }; struct MyE { int numOnEdge; }; typedef adjacency_list MyGraph; I would like to use the read function as defined in adjacency_list_io.hpp, so I can read in my special graph from a file that looks like below. # 3 vertices, v0.numOnVertex=6, v1.numOnVertex=5, v2.numOnVertex=3 v 0 6 1 5 2 3 # 3 edges, edge 0, numOnEdge=0; edge 1, numOnEdge=3, edge 2, numOnEdge = 3 e 1 2 0 0 1 3 1 0 3 I can't seem to figure out a simple way to do IO with bundled properties. When I try these lines: MyGraph g; cin >> read(g); I get the error: C:\boost_1_33_1\boost/graph/adjacency_list_io.hpp(153) : error C2679: binary '>>' : no operator found which takes a right-hand operand of type 'MyV' (or there is no acceptable conversion)