main.cpp

#include <iostream>
#include "provider.h"

using Graphics = int;

using GraphicsProvider = Provider<Graphics>;
MACRO_DEFINE_PROVIDER_ACCESS(GraphicsProvider)

void function();

int main(int argc, char *argv[])
{
  {
    GraphicsProvider provider;

    Graphics graphics;
    provider.Register(&graphics);

    function();
  }

  function();

  return 0;
}

void function()
{
  // do something with Graphics
  std::cout << Get<Graphics>() << std::endl;
}

// compile and run:
// g++ --std=c++14 main.cpp -o bin && ./bin

// output:
// 0x7ffd9b914d9c
// 0