[Boost-users] [graph] inheriting from adjacency_list

From: Krishna Roskin (krish_at_[hidden])
Date: 2007-11-20 04:48:09

Hey all,

I've been having some problems inheriting from adjacency_list. My code  
is real simple:

---------- 8>< ----------
#include<iostream>
#include<string>
#include<boost/graph/adjacency_list.hpp>

using namespace boost;

class Weighted : public adjacency_list<vecS, vecS, bidirectionalS,
     property<vertex_distance_t, double>, no_property, no_property> {
};

int main(int argc, char* argv[]) {
     Weighted m;

     property_map<Weighted, vertex_distance_t>::type
         pmap = get(vertex_distance, m);

     return 0;
}
---------- 8>< ----------

The error is:

main.cpp: In function ‘int main(int, char**)’:
main.cpp:16: error: conversion from  
‘boost 
::vec_adj_list_vertex_property_map<boost::adjacency_list<boost::vecS,  
boost::vecS, boost::bidirectionalS,  
boost::property<boost::vertex_distance_t, double, boost::no_property>,  
boost::no_property, boost::no_property, boost::listS>,  
boost::adjacency_list<boost::vecS, boost::vecS, boost::bidirectionalS,  
boost::property<boost::vertex_distance_t, double, boost::no_property>,  
boost::no_property, boost::no_property, boost::listS>*, double,  
double&, boost::vertex_distance_t>’ to non-scalar type  
‘boost::vec_adj_list_vertex_property_map<Weighted, Weighted*, double,  
double&, boost::vertex_distance_t>’ requested
make: *** [main.o] Error 1

Is there some reason that this won't work? Is it a bug? If I try to  
get property_maps for edge properties, I don't have problems.

Any help greatly appreciated,
-krish

-- 
Krishna Roskin
Center for Biomolecular Science and Engineering, UC Santa Cruz
mailto:krish_at_[hidden]
http://www.soe.ucsc.edu/~krish/