#include <iostream>
 
struct loop_counter {
  loop_counter(int v) : val_(v) {}
  explicit operator bool() const { return true; }
           operator int()  const { return val_; }
 
private:
  int val_;
};
 
#define LOOP(begin, end, cnt_name) \
  for(int cnt_name##__ = begin ; cnt_name##__ < end ; ++cnt_name##__) \
    if(const loop_counter cnt_name = cnt_name##__)
 
int main(int argc, char** argv) {
  LOOP(0, 10, i) {
    //i = 10; // !!!yamero!!!
    std::cout << i << std::endl;
  }
}

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