Re: [Boost-users] bind: what am I doing wrong here?

15 Apr 2009


      Peter Dimov wrote:
...
Noah Roberts:
...
// won't compile:
  std::transform(m.begin(), m.end(), keys.begin(), 
boost::bind(&std::pair<std::string,Test>::first, _1));
The value type of the map m is pair<string const, Test> - note the 
const. Use the value_type typedef:
typedef std::map<std::string, Test> map_type;
std::transform( m.begin(), m.end(), keys.begin(),
   boost::bind(&map_type::value_type::first, _1) );
It would be something basic.  Thanks.