Re: [Boost-users] PropertyWriter problem - how to handle a boost::shared_ptr type

From: Stephen torri (storri_at_[hidden])
Date: 2004-11-08 12:10:38

On Mon, 2004-11-08 at 11:32, Doug Gregor wrote:

> A property writer is passed the output stream and the descriptor, so 
> you want to write Component_Writer like so:
> 
> class Component_Writer {
> public:
>    typedef boost::graph_traits<Graph_Type>::vertex_descriptor 
> Vertex_Type;
> 
>    Component_Writer(const Graph_Type& g) : g(g) {}
> 
>    void operator()(std::ostream& out, Vertex_Type v)
>    {
>      boost::shared_ptr<Component> obj_ptr = get(vertex_name, g, v);
>      // code from before...
>    }
> };
> 
> 	Doug
> 

So if I store the Component in the Vertex by value instead of within a
boost::shared_ptr then I would write the Component_Writer as:

class Component_Writer {
public:

        typedef boost::graph_traits<Graph_Type>::vertex_descriptor Vertex_Type;

        Component_Writer (const Graph_Type& g) : g(g) {}

        void operator() (std::ostream& out, Vertex_Type v)
        {	
           Component obj = get (vertex_name, g, v);
           // code from before.
        }

I appreciate the information. I will try these changes.

Stephen
-- 
Email: storri_at_[hidden]