#include <iostream>
#include <functional>
using namespace std;
 
typedef int (*http_cb) (int*);
 
struct http_parser_settings {
  http_cb      on_message_begin;
};
 
class HttpParser
{
  int OnMessageBegin(int* val){}
 
  HttpParser()
  {
    http_parser_settings settings;
    //settings.on_message_begin = std::bind(&HttpParser::OnMessageBegin, this, //std::placeholders::_1);
   settings.on_message_begin = [](int* p){ return 0;};
  }
};
 
int main() {
 
}

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