On Sun, 15 Aug 2010, Caligula wrote:

Thanks Cedric & Jeremiah,

I tried a bunch of stuff

  template < typename Graph >     void test_graph_property( Graph & g )   {

        //get_property(graph_properties, bobo);         //g[graph_properties].bobo;         //g[graph_bundle].bobo;         //g[bobo];           //get(bobo,g);         //get(g, graph_properties);         //cout << g[g].bobo << endl;           //get_property(g.graph_properties, bobo);         get_property(g, bobo);

  }

But nothing works. For "get_property(g, bobo);"  I get   In function ‘void test_graph_property(Graph&)’: error: ‘bobo’ was not declared in this scope

The doc pages you refered me to only mention property_maps, as far as I can tell. Maybe I need to declare a property_map such as

       property_map < graph_t, int >::type           capacity = get(bobo, g);

I would hope that I could avoid this using bundled properties.

You probably can, but bundled graph properties have only been in the Boost trunk for about a week and are not the 1.43 or 1.44 releases. Otherwise, you will need to use old-style properties (you can define a single property that contains your struct of properties, though). -- Jeremiah Willcock

Thanks Cedric & Jeremiah, I tried a bunch of things template < typename Graph > void test_graph_property( Graph & g ) { //get_property(graph_properties, bobo); //g[graph_properties].bobo; //g[graph_bundle].bobo; //g[bobo]; //get(bobo,g); //get(g, graph_properties); //cout << g[g].bobo << endl; //get_property(g.graph_properties, bobo); get_property(g, bobo); } But nothing works. For "get_property(g, bobo);" I get In function ‘void test_graph_property(Graph&)’: error: ‘bobo’ was not declared in this scope The doc pages you refered me to only mention property_maps, as far as I can tell. Maybe I need to declare a property_map such as property_map < graph_t, int >::type capacity = get(bobo, g); I would hope that I could avoid this using bundled properties. Thanks ________________________________ From: Jeremiah Willcock <jewillco@osl.iu.edu> To: boost-users@lists.boost.org Sent: Sat, August 14, 2010 12:05:25 PM Subject: Re: [Boost-users] How to access a GRAPH property? - simple On Fri, 13 Aug 2010, Mike Douglass wrote:

I have

struct vertex_properties { blah blah }

struct edge_properties { blah blah }

struct graph_properties {

int bobo;

}

typedef adjacency_list < vecS, vecS, bidirectionalS, property< vertex_predecessor_t, vertex_t, vertex_properties >, property< edge_reverse_t, edge_t, edge_properties >, graph_properties > graph_t;

graph_t g;

But how can I access bobo?

g.bobo; does not compile (otherwise compiles OK).

To get the graph property, you can use the get_property() function, documented at http://www.boost.org/doc/libs/1_43_0/libs/graph/doc/adjacency_list.html> (near the bottom). Bundled graph properties are new (just added to the trunk in the past few weeks); I believe the syntax for those is "g[graph_bundle].bobo". -- Jeremiah Willcock