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 16:26:46

so this is what I see is happening

if I use get_property(graph, propertyname) = propertyvalue
to set the property on the graph then setting the property on reverse graphs
does not work (even with the new typedef in the sample code i posted)

however using set_property(graph, propertyname, propertyvalue) works when
used with the new typedef.
(even in my application)

Thanks Jeremiah

Mangal wrote:
> 
> 
> in the first example that i posted i made the following change to the
> definition of reverse_graph
> 
> typedef reverse_graph<graph_t, graph_t&> reverse_graph_t;
> and now setting the name property on reverse graph works. accessing it
> using the original graph also works.
> 
> However in my app which uses a new property defined by me the new typedef
> still throws at runtime
> I will work with it a little more and if I can't figure it out will let
> you know
> 
> Thanks for the help
> 
> 
> Jeremiah Willcock wrote:
>> 
>> On Tue, 24 Nov 2009, Mangal wrote:
>> 
>>>
>>> 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
>> 
>> Could you please try building your reverse_graph as:
>> 
>> reverse_graph<Graph, Graph&>
>> 
>> and see if that changes the behavior?
>> 
>> -- Jeremiah Willcock
>> _______________________________________________
>> Boost-users mailing list
>> Boost-users_at_[hidden]
>> http://lists.boost.org/mailman/listinfo.cgi/boost-users
>> 
>> 
> 
> 

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