[zeromq-dev] C++ syntax for new ZMQ objects

Claudio Carbone erupter at libero.it
Sat Dec 15 16:28:12 CET 2012

On 15/12/12 15:49, Pieter Hintjens wrote:
> The straight C semantics are easiest to map to arbitrary languages.
> The C++ binding could have built abstractions on top but never
> accomplished this. Ironically the C binding (CZMQ) is somewhat
> higher-level than the C++ binding.
> -Pieter

Mmm ok but then I have a problem (surely because of me being a novice in 
I have this in my class header
/    extern "C" {//
//        #include <zmq.h>//
//        #include <zhelpers.h>//
//    }
     rest of the class declaration follows

And I'm linking both the library and the program against libzmq.
Now when the program is run, it fails throwing the following error:
/    terminate called after throwing an instance of 'int'/

Following the calls, I see that my code ends up calling zmq.cpp, so I 
suppose it fails because of the different objects I'm declaring and using.
But I included the C headers, and linked only against libzmq, so I don't 
understand why I get the cpp library linked.

Exact failing point is in socket_base.cpp at line 323:
/    rc = parse_uri (addr_, protocol, address);
     if (rc != 0)
         return -1;/

Even if rc is effectively 0 (checked in GDB), the if (don't know why) 
returns true.
I'm at a loss here...

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