Re: [Boost-users] issues with setting properties on reverse graph

Subject: Re: [Boost-users] issues with setting properties on reverse graph
From: Mangal (mangalmanish_at_[hidden])
Date: 2009-11-24 15:51:51

yes it works when I set it on the original graph. 
setting it in the original graph and reading in reverse_graph works. (which
is what I do in my application)

I had a function 
template<Graph>
void myfun( Graph & g)
{
//some code
get_property(g, graph_MyProperty) = propertyValue
}

and wanted to use it like
myfun(originalGraph)
myfun(reverseGraph)

setting property on the reverse_graph does not seem to be doing anything,
infact when trying to access the property somewhere else throws a null
reference exception

Jeremiah Willcock wrote:
> 
> On Mon, 16 Nov 2009, Mangal wrote:
> 
>>
>> Trying to set graph properties on reverse graph does not seem to be
>> working.
>> I am using boost 1.40.0
>> A simple program where we set graph_name to "graph" on a reverse graph
>> does
>> not work
>> int main()
>> {
>>  using namespace boost;
>>  using std::string;
>>  typedef adjacency_list<vecS, vecS, directedS,no_property,
>>    property<edge_index_t, int>,
>>    property<graph_name_t, string> > graph_t;
>>
>>  typedef reverse_graph<graph_t> reverse_graph_t;
>>
>>  graph_t g;
>>  reverse_graph_t sg = reverse_graph_t(g);
>>  std::string Name = "graph";
>>  set_property(sg, graph_name, Name) ;
>>
>>  std::cout << "name: " << get_property(sg, graph_name) << std::endl;
>>  return 1;
>>
>> }
>>
>> Name comes out to be empty in this case.
>>
>> any ideas???
> 
> Does it work if you set the name on the original graph?  What about 
> setting it on the original graph and reading it from the reverse_graph? 
> What about setting it on the reverse_graph and reading it from the 
> original?
> 
> -- Jeremiah Willcock
> _______________________________________________
> Boost-users mailing list
> Boost-users_at_[hidden]
> http://lists.boost.org/mailman/listinfo.cgi/boost-users
> 
> 

-- 
View this message in context: http://old.nabble.com/issues-with-setting-properties-on-reverse-graph-tp26384490p26503054.html
Sent from the Boost - Users mailing list archive at Nabble.com.