Add comments to all functions. Optimize move constructor and move assigment operator, remove size check inside pop/remove/peek. Static assert in pushtyp/addtyp/poptyp in order to avoid pitfall with std::string (pushstr/addstr/popstr should be used for that). Add sanity check for poptyp, size of message must match desired type.
This class handles multipart messaging. It is the C++ equivalent of zmsg.h, which is part of CZMQ (the high-level C binding). Furthermore, it is a major improvement compared to zmsg.hpp, which is part of the examples in the ØMQ Guide. Unnecessary copying is avoided by using move semantics to efficiently add/remove parts.
New fill constructor: message_t(const void *data, size_t size). Constructs a new message of the given size and copies the data to the message body. In addition a new rebuild() function that does the same for an already constructed object
When making a debug build with msvc, the range constructor of message_t caused warning 4996: 'std::_Copy_impl': Function call with parameters that may be unsafe. It is actually safe to do what's done in the constructor, so the workaround is to mimic what std::copy does, whitout the range check.
A better/nicer solution to fix the type mismatch warnings (size_t to int). Working with size_t as long as possible and doing the static_cast right before calling the zmq_poll() function of libzmq
Fix the following two problems in message_t's range constructor: (1) The range constructor passed the wrong size for iterator-types larger than one byte, (2) The range constructor didn't compile for const-iterators.
The zmq_msg_recv() function takes the message, socket, and flags while the zmq_recvmsg() function takes the socket, message. This commit addresses that difference.
The zmq_recvmsg() function has been replaced by zmq_msg_recv() since version 3.2.0, and has since been marked as deprecated.
See: https://raw.githubusercontent.com/zeromq/zeromq3-x/master/NEWS
Replace our uses of the old function (which was in monitor_t::monitor()) with the more modern function call. Support backwards compatibility with a #DEFINE macro for versions of zmq preceeding 3.2.0
MSVC complains about conversion of size_t to int. The size_t typedef is
defined as an unsigned __int64 on Win64, which triggers the warning. Two
such instances were fixed with static_cast<int>(size_t)
