Class SelectImplIfFalse

src/operators/math/select.cpp:92–116

template <typename DataT>
struct SelectImplIfFalse
{
  DataT m_value, m_epsilon, m_iffalse;
  SelectImplIfFalse(DataT const& value,
                    DataT const& epsilon,
                    DataT const& iffalse)
    : m_value(value), m_epsilon(epsilon), m_iffalse(iffalse)
  {}

  DataT operator()(DataT const& predicate, DataT const& iftrue) const noexcept
  {
    bool istrue = std::fabs(predicate - m_value) < m_epsilon;
    return istrue ? iftrue : m_iffalse;
  }
  void operator()(DataT const& predicate,
                  DataT const& iftrue,
                  DataT const& dy,
                  DataT& dpredicate,
                  DataT& diftrue) const noexcept
  {
    bool istrue = std::fabs(predicate - m_value) < m_epsilon;
    diftrue = istrue ? dy : El::TypeTraits<DataT>::Zero();
    dpredicate = El::TypeTraits<DataT>::Zero();
  }
};

template <typename DataT>
struct SelectImplConstant