[Boost-users] trying to build custom property_map

Hi, I created a simple property_map as follows: struct VecMap { typedef int value_type; typedef int key_type; typedef read_write_property_map_tag category; typedef int* reference; std::vector<int> vec_store; }; void put(VecMap& rmap, int key, int val) { rmap.vec_store[key] = val; } int get(VecMap& rmap, int key) { return rmap.vec_store[key]; } /// End code The compiler gcc-4.4.1 against latest boost-trunk gives errorerror: no type named value_type in struct boost::property_traits<VecMap> The code however compiles fine with boost_1_40. Please take a look. The full code is available here http://codepad.org/KtmbXkLa Thanks Sandeep