title: Can two "using" collide?
body: <p>So I have to use some members of Boost library and some from the std namespace. Right now, I have <code>using boost::asio::ip::tcp;</code> declared and am calling appropriate members with <code>std::</code> and for example <code>tcp::iostream server()</code>. Is there any reason why I shouldn't add another <code>using</code>, namely <code>using namespace std;</code> and then call all the <code>std</code> things without <code>std::</code> prefix? Can these two somehow collide or cause malfunction?</p>