Re: [Boost-users] PropertyGraphConcept concept checking errors for an example implicit graph

Thanks. I figured out how that I needed to put a boost namespace around the whole specialization sometime last night, and after I did everything built correctly. The mysterious non-scalar conversion error went away. Ultimately I think the source of my confusion lay in the fact that property graph concept types are defined in property_map structures while all other graph concept types are defined in graph traits. I was so in the habit of adding typedefs inside my graph class I overlooked the fact that property graphs do something else. In retrospect this is all clearly spelled out in the documentation, but if I was confused about it someone else probably will be too. Hopefully my sample at http://github.com/wpm/Boost-Implicit-Graph-Example can prevent someone from going down the same path. Thanks again for your help. On Fri, Jun 25, 2010 at 6:55 AM, Jeremiah Willcock wrote:

On Thu, 24 Jun 2010, W.P. McNeill wrote:

How do I "specialize boost::property_map directly"? This might be the key

...

to the problem.

My current shot in the dark is to try: template<> struct boost::property_map { typedef EdgeWeightMap type; typedef EdgeWeightMap const_type; };

which gives me the error

implicit.hpp:116: error: specialization of ‘template struct boost::property_map’ in different namespace /opt/local/include/boost/graph/properties.hpp:244: error: from definition of ‘template struct boost::property_map’

You need to do:

namespace boost { template <> struct property_map { ... }; }

-- Jeremiah Willcock _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users