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
I tried the code you posted (at codepad) with GCC 3.4, 4.1, and 4.4.0 and did not receive an error. Note that in the trunk, the property_map header file is <boost/property_map/property_map.hpp>.
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The posted code works with earlier version of boost. However when I change the header to boost/property_map/property_map.hpp and use boost-trunk that it start giving errors. I compiled against gcc 4.4.1, 4.4 and 4.2. It gives the same error for all the three. -Sandeep