Function begin

3rdparty/cppzmq/zmq.hpp:238–241

using std::begin;
using std::end;
template<class T> auto begin(T &&r) -> decltype(begin(std::forward<T>(r)))
{
    return begin(std::forward<T>(r));
}
template<class T> auto end(T &&r) -> decltype(end(std::forward<T>(r)))
{
    return end(std::forward<T>(r));