Re: [Boost-users] How to use property_map?

On Thu, 8 Apr 2010, Yaohua Xiong wrote:

Hi, Jeremiah. Thanks for your reply.

...

The declaration "PMap map();" declares a function named "map" that returns an object of type "PMap".  Just use the original form "PMap map;" if you want to declare an actual map.

You are right. What a stupid mistake I make, probably I've been writing Python for too long time :-). As for the original form do you have some speculation on why it's crashing?

After I surf on the Internet for a while, I found a solution to the crashing problem by change the program into:

#include <iostream> #include <map> #include <string> #include using std::string; using boost::put; using boost::get;

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

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

return EXIT_SUCCESS; }

The associative_property_map just contains a reference to a container, not an actual container. Look at URL:http://www.boost.org/doc/libs/1_42_0/libs/property_map/doc/associative_p... for more information (see the top paragraph). -- Jeremiah Willcock