[Boost-users] Is this possible with boost::multi_index?

From: Jason House (jasonhouse_at_[hidden])
Date: 2006-05-03 09:58:27

Below is a small piece of code that I can't get to compile.
gcc says: error: forward declaration of 'class search_node'

Is there a way to get around this, or can I not embed a 
multi_index_container like that?  I'm using boost 1_32_0 and gcc version 
4.0.1

The code below is for a node within a search tree.  Each node stores a

> class search_node{
>   int      objective_value;                // Objective function
>   position my_position;                    // Move location for this step in the search
>   std::list<position> positions_to_visit;  // Future moves to consider in search
>   boost::multi_index_container <
>     search_node,
>     indexed_by<
>       ordered_unique    <search_node, position, &search_node::my_position>,
>       ordered_non_unique<search_node, int,      &search_node::objective_value>
>     > > search_results;
> };

... or am I just going down a wrong path?  I'm trying to build a search 
tree.  I know boost::graph exists, but don't know if it'd be more 
appropriate.