#define SLASH(x,y) x y
#define OUT SLASH(/,/)

int main(int argc, char *argv[])
{
  OUT << "text";
  return 0;
}

{
  // << "text";
  return 0;
}

#define SLASH(x) /x
#define OUT SLASH(/)

int main(int argc, char *argv[])
{
  / / << "text";
  return 0;
}

static class NullOutput {
public:
    template <typename T>
    const NullOutput &operator<<(T arg) const {
        return *this;
    }
} NullOutputObj;

#define OUT NullOutputObj

#define SLASH(x,y) x##y
#define OUT SLASH(/,/)