[Boost-users] How to use property_map?

7 Apr 2010

      Hi,

I'm trying to figure out how to use property_map in boost graph, after
I reduce the problem to the minimal I still don't know what the
problem is. Can someone help with this? Thanks in advance.

Here is the simplified example:

#include <iostream>
#include <map>
#include <string>
#include <boost/property_map/property_map.hpp>
using std::string;
using boost::put;
using boost::get;

int main()
{
  typedef std::map<std::string, int> Map;
  typedef boost::associative_property_map<Map> PMap;

  PMap map;
  put(map, string("acc"), 1);
  get(map, string("acc"));

  return EXIT_SUCCESS;
}

This version compiles OK with mingw 4.4, but crash when running. If I
make a change from "PMap map;" into "PMap map();" which I think is
equivalent, then this code fail to compile, and say

D:\myproject\test\boost_test\property_map\pp.cpp: In function 'int main()':
D:\myproject\test\boost_test\property_map\pp.cpp:15: error: no matching function
 for call to 'put(main()::PMap (&)(), std::string, int)'
D:\myproject\test\boost_test\property_map\pp.cpp:16: error: no matching function
 for call to 'get(main()::PMap (&)(), std::string)'

What's the problem is?

-- 
Yaohua Xiong

Traffic and Transportation Engineering College, Tongji Univ.
Cao An Road 4800#, Jia Ding District, Shanghai,  China