oss_src/fault/zmq/zmq_msg_vector.hpp
inline void pop_front() {
     if (!empty()) {
       msgs.pop_front();
       // shift the read index if it not already at the head
       read_index -= (read_index > 0);
     }
   }
/// removes an element from the front.
removes an element from the front.
removes an element from the front .
inline void pop_front() {
     if (!empty()) {
       msgs.pop_front();
       read_index -= (read_index > 0);
     }
   }
inline void pop_front ( ) { if ( ! empty ( ) ) { msgs . pop_front ( ) ; read_index -= ( read_index > 0 ) ; } }
removes an element from the front.
removes an element from the front .
// shift the read index if it not already at the head