void move_to_next_valid()
{
iter_t& it = this->base_reference();
pred_t& bi_pred = *this;
if (it != m_last)
{
if (default_pass)
{
iter_t nxt = ::pdalboost::next(it);
while (nxt != m_last && !bi_pred(*it, *nxt))
{
++it;
++nxt;
}
}
else
{
iter_t nxt = ::pdalboost::next(it);
for(; nxt != m_last; ++it, ++nxt)
{
if (bi_pred(*it, *nxt))
{
break;
}
}
if (nxt == m_last)
{
it = m_last;
}
}
}
}
void increment()
{
iter_t& it = this->base_reference();
BOOST_ASSERT( it != m_last );
pred_t& bi_pred = *this;
iter_t prev = it;
++it;
if (it != m_last)
{
if (default_pass)
{
while (it != m_last && !bi_pred(*prev, *it))
{
++it;
++prev;
}
}
else
{
for (; it != m_last; ++it, ++prev)
{
if (bi_pred(*prev, *it))
{
break;
}
}
}
}
}