[Boost-users] [BGL] vertex_index_t, edge_index_t?

Subject: [Boost-users] [BGL] vertex_index_t, edge_index_t?
From: Geoff Hilton (geoff.hilton_at_[hidden])
Date: 2008-12-08 11:21:25

Quick question:

Given an arbitrary graph of type:

typedef boost::adjacency_list<
             boost::listS,                   //out edge list selector
             boost::vecS,                    //vertex list selector
             boost::bidirectionalS,          //directedness selector
             VertexPropertyWrapper_type,
             EdgePropertyWrapper_type>       Graph_type;

Where:
typedef boost::property<
             boost::vertex_index_t,
             unsigned long long,
             MyVertexProperty>             VertexPropertyWrapper_type;

And:
typedef boost::property<
             boost::edge_index_t,
             unsigned long long,
             MyEdgeProperty>               EdgePropertyWrapper_type;

How does setting edge/vertex_index_t as an interior property 
affect..anything? I saw in a post on this list somewhere a while ago 
that this was a necessary workaround for something or other (that which 
I don't recall now).

In the post it actually said to use "int" (or was it unsigned int?) 
rather than unsigned long long but in any case I left it as unsigned 
long long and it hasn't affected anything negatively thus far so I left 
it that way. I believe I put it at unsigned long long because the type 
that was suggested for the *_index_t happened to match a weight type 
used in the post, but whether that was intentionally and implicitly or 
unintentionally and explicitly I don't remember.

Thank you,
Geoff