C++ Bindings

In addition to the native support Hobbes has for networking, there’s a useful C++ API that you can use to send messages to Hobbes processes.


#include <iostream>
#include <hobbes/net.H>

  Connection,                       // Profile name, which we'll use later
  (mul, int(int,int), "\\x y.x*y")  // Functionality to evaluate remotely

Similarly to the Logging code, we first define the Connection semantics that we want to use. This macro creates a connection class for us which has a constructor and a data member for the mul function, along with all the type negotiotiation and connectiona management logic.

Using the connection

int main(int, char**) {
  try {
    Connection c("localhost:8080");

    std::cout << "c.mul(1,2) = " << c.mul(1,2) << std::endl;

  } catch (std::exception& e) {
    std::cout << "*** " << e.what() << std::endl;
  return 0;

Here we’re instantiating the synthesised Connection class, invoking its mul member (remotely!) and printing out the result.

Running the code

Again, spin up an instance of hi listening on port 8080. You won’t see any output from here.

$ hi -s -p 8080

Next, simply run your c++ driver program!

$ ./test
c.mul(1,2) = 2