Re: [Boost-users] Property map deletion

From: David Ohlemacher (ohlemacher_at_[hidden])
Date: 2003-11-13 12:12:08

Hi Jeremy,

Internal.  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);
}

Jeremy Siek wrote:

>I'm not sure what you mean by "custom". Are you using an internal property
>map (e.g., inside an adjacency_list) or are you using some external
>property map?
>
>On Thu, 13 Nov 2003, David Ohlemacher wrote:
>
>ohlema> Hi all.
>ohlema>
>ohlema> Partway through my app's execution, I find that I no longer need the
>ohlema> values in a custom property map (edge).  The map potentially may be
>ohlema> quite large.
>ohlema>
>ohlema> What is the best way to empty it?
>ohlema>
>ohlema> Thanks,
>ohlema> -d
>ohlema>
>ohlema> _______________________________________________
>ohlema> Boost-users mailing list
>ohlema> Boost-users_at_[hidden]
>ohlema> http://lists.boost.org/mailman/listinfo.cgi/boost-users
>ohlema>
>
>----------------------------------------------------------------------
> Jeremy Siek                          http://php.indiana.edu/~jsiek/
> Ph.D. Student, Indiana Univ. B'ton   email: jsiek_at_[hidden]
> C++ Booster (http://www.boost.org)   office phone: [phone]
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>
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-- 
David Ohlemacher
BBN Technologies
127 John Clarke Rd.
Middletown, RI 02878
Phone: [phone], Fax:[phone]
ohlemacher at bbn dot com