Re: [Boost-users] trying to build custom property_map

Subject: Re: [Boost-users] trying to build custom property_map
From: Jeremiah Willcock (jewillco_at_[hidden])
Date: 2010-04-01 00:16:04

On Wed, 31 Mar 2010, Sandeep Gupta wrote:

> 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>.

-- Jeremiah Willcock