    CImg<T>& operator>>=(const char *const expression) {
      return *this>>=(+*this)._fill(expression,true,1,0,0,"operator>>=",this);
    }
    CImg<T>& operator>>=(const char *const expression) {
      return *this>>=(+*this)._fill(expression,true,1,0,0,"operator>>=",this);
    }