Using std Namespace

Question

There seem to be different views on using \'using\' with respect to the std namespace.

Some say use \' using namespace std\', other say don\'t but rathe

Answer 1

For me, I prefer to use :: when possible.

std::list iList;

I hate to write :

for(std::list::iterator i = iList.begin(); i != iList.end(); i++)
{
    //
}

Hopefully, with C++0x I would write this:

for(auto i = iList.begin(); i != iList.end(); i++)
{
    //
}

If the namespace is very lengthy,

namespace dir = boost::filesystem;

dir::directory_iterator file("e:/boost");
dir::directory_iterator end;

for( ; file != end; file++)
{
    if(dir::is_directory(*file))
        std::cout << *file << std::endl;
}