Simple C++ class with C interface for Luajit ffi bindings

gistfile1.c++

// g++ simple.cpp -shared -o libsimple.dylib
#include <stdio.h>

class Simple {
  int id_;
public:
  Simple(int id);

  ~Simple();

  int id();
};

Simple::Simple(int id) : id_(id) {
  printf("[%p:%i] Simple()\n", this, id_);
}

Simple::~Simple() {
  printf("[%p:%i] ~Simple()\n", this, id_);
}

int Simple::id() {
  return id_;
}

extern "C" {
  Simple *Simple_Simple(int id) {
    return new Simple(id);
  }

  void Simple__gc(Simple *this_) {
    delete this_;
  }

  int Simple_id(Simple *this_) {
    return this_->id();
  }
}