Re: [Boost-users] BGL: shared_ptr as bundled properties > how to generate properties maps ???

Subject: Re: [Boost-users] BGL: shared_ptr as bundled properties > how to generate properties maps ???
From: Damien Maupu (damien.maupu_at_[hidden])
Date: 2010-01-07 03:33:54

 >On Wed, 6 Jan 2010, Emil Dotchevski wrote:

> > On Wed, Jan 6, 2010 at 8:20 AM, Damien Maupu 
<damien.maupu_at_[hidden]> wrote:
 >>> I write something like:
 >>> typedef boost::shared_ptr<Vertex> VertexPtr;
 >>> typedef boost::shared_ptr<Edge> EdgePtr;
 >>> typedef adjacency_list<vecS, vecS, directedS, VertexPtr, EdgePtr>   
 Graph;
 >>
 >> It is probably not a good idea to use shared_ptr for graphs; some
 >> graphs have cycles and this will lead to leaks (if your data structure
 >> is a DAG, you're fine.)

 >I don't think that will be an issue -- his shared pointers link to
 >properties; the graph structure itself is in BGL data structures.
 >However, if the properties refer to other graph vertices or edges, there
 >is an issue of dangling references if those objects are removed from the
 >graph.

 >-- Jeremiah Willcock

Hi,

I am not sure I understand why using smart pointer should be an issue.
Could you explain me in little more details?

Do you know how to get properties maps if bundle properties are pointer 
or smart pointers?

Thank you

Damien