rangesIntersect.h

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#ifndef TrackingTools_DetLayers_rangesIntersect_h
#define TrackingTools_DetLayers_rangesIntersect_h

template <typename Range>
inline bool rangesIntersect(const Range& a, const Range& b) {
  return !((a.first > b.second) | (b.first > a.second));
}

template <typename Range, typename Less>
inline bool rangesIntersect(const Range& a, const Range& b, Less const& less) {
  return !(less(b.second, a.first) | less(a.second, b.first));
}
template <typename Range, typename T>
inline bool rangesIntersect(const Range& a, const Range& b, bool (*less)(T, T)) {
  return !(less(b.second, a.first) | less(a.second, b.first));
}
#endif