This example, from the docs, won't compile with linux g++3.4.3

typedef map<

pair<int, char>

  , pair<double, std::string> >

map_type;

map_type m(

make_pair<int>('X')

  , make_pair<double>("Men"));

int main()

{

std::cout << at<int>(m) << std::endl;

std::cout << at<double>(m) << std::endl;

}