Function Hash

libs/base/math.hpp:173–177

// Calculate hash for the pair of values.
template <typename T1, typename T2>
size_t Hash(T1 const & t1, T2 const & t2)
{
  /// @todo Probably, we need better hash for 2 integral types.
  return (std::hash<T1>()(t1) ^ (std::hash<T2>()(t2) << 1));
}
}  // namespace math