Program Listing for File interval.hpp

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#ifndef SEQUANT_CORE_INTERVAL_H
#define SEQUANT_CORE_INTERVAL_H

#include <SeQuant/core/hash.hpp>

// boost/numeric/interval does not know about arm rounding .. on arm64/macos use
// c99 rounding
#if defined(__arm64__) && defined(__APPLE__) && !defined(__USE_ISOC99)
#define __USE_ISOC99 1
#include <boost/numeric/interval.hpp>
#undef __USE_ISOC99
#else
#include <boost/numeric/interval.hpp>
#endif

namespace boost::numeric {

template <typename T>
inline auto hash_value(const boost::numeric::interval<T>& i) {
  auto val = sequant::hash::value(i.lower());
  sequant::hash::combine(val, i.upper());
  return val;
}

template <typename T>
inline auto is_definite(const boost::numeric::interval<T>& i) {
  return i.lower() == i.upper();
}

template <typename T>
inline auto nonnegative(const boost::numeric::interval<T>& i) {
  assert(i.upper() >= 0);
  return boost::numeric::interval<T>{std::max(T(0), i.lower()), i.upper()};
}

}  // namespace boost::numeric

#endif  // SEQUANT_CORE_INTERVAL_H