intersect.cpp

template<typename Coordinate>
Shape<Coordinate> allSpace() {
  return [](Coordinate const&) {
    return true;
  };
}

template<typename Coordinate>
Shape<Coordinate> intersect(Shape<Coordinate> const& lhs, Shape<Coordinate> const& rhs) {
  return [=](Coordinate const& coord) {
    return lhs(coord) && rhs(coord);
  };
}