Class SelectImplIfTrue

src/operators/math/select.cpp:65–89

template <typename DataT>
struct SelectImplIfTrue
{
  DataT m_value, m_epsilon, m_iftrue;
  SelectImplIfTrue(DataT const& value,
                   DataT const& epsilon,
                   DataT const& iftrue)
    : m_value(value), m_epsilon(epsilon), m_iftrue(iftrue)
  {}

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

template <typename DataT>
struct SelectImplIfFalse