[Boost-users] Property map deletion

From: David Ohlemacher (ohlemacher_at_[hidden])
Date: 2003-11-14 13:31:06

Hi all.
 
Partway through my app's execution, I find that I no longer need the 
values in a custom internal property map (edge).  The map potentially 
may be quite large.  

What is the best way to empty it?
 
Thanks,
-d

> Here is my implementation. It is right out of your (very helpful) book.
>
> -d
>
> namespace boost
> {
>    // ECInGraph custom properties.
>    enum vertex_com_t           {vertex_com      = 1223497};
>    enum edge_nEmailsIn_t       {edge_nEmailsIn  = 1223498};
>    enum edge_nEmailsOut_t      {edge_nEmailsOut = 1223499};
>    enum edge_sourceVD_t        {edge_sourceVD   = 1223500};
>    BOOST_INSTALL_PROPERTY (vertex, com);
>    BOOST_INSTALL_PROPERTY (edge, nEmailsIn);
>    BOOST_INSTALL_PROPERTY (edge, nEmailsOut);
>    BOOST_INSTALL_PROPERTY (edge, sourceVD);
> }
>
>
> typedef boost::property <boost::edge_nEmailsOut_t, int,
>    boost::property <boost::edge_nEmailsIn_t, int,
>    boost::property <boost::edge_sourceVD_t, unsigned int> > > 
> InGraphEdgeProps;
> typedef boost::property <boost::vertex_name_t, std::string,
>    boost::property <boost::vertex_com_t, int> >               
> InGraphVertexProps;
>
> typedef boost::adjacency_list <
>        boost::vecS,            // Edge list is a std::vector
>        boost::vecS,            // Vertex list is a std::vector
>        boost::undirectedS,     // undirected graph
>        InGraphVertexProps,     // Vertex properties
>        InGraphEdgeProps,       // Edge properties
>        boost::no_property      // Graph properties
>    > ECInGraph;
>
>
> void EC::InitGraphPropertyMaps()
> {
>    // m_inGraph property maps.
>    m_g2VName       = boost::get(boost::vertex_name, m_inGraph);
>    m_g2Com         = boost::get(boost::vertex_com, m_inGraph);
>    m_g2EmailsIn    = boost::get(boost::edge_nEmailsIn, m_inGraph);
>    m_g2EmailsOut   = boost::get(boost::edge_nEmailsOut, m_inGraph);
>    m_g2SourceVD    = boost::get(boost::edge_sourceVD, m_inGraph);
> }
>