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#pragma once
#include "Tracker.h"
namespace pymol
{
/**
* Manages a Tracker list provided from outside function
*/
template <typename T> class TrackerAdapter
{
/**
* Iterator for pymol::ListAdapter
* Not really aiming to satisfy any of the standard
* named requirements for iterators, but to only implement
* ones that will likely be used.
* Uses IsConst pattern to avoid having to define non-const and const iterator
* versions
*/
template <bool IsConst> class TrackerAdapterIterator
{
public:
using value_type = typename std::conditional<IsConst, const T, T>::type;
using pointer = value_type*;
using reference = value_type&;
TrackerAdapterIterator()
: m_ptr(nullptr)
{
}
explicit TrackerAdapterIterator(CTracker* tracker, int list_id)
: m_tracker(tracker)
, m_iter_id(TrackerNewIter(tracker, 0, list_id))
{
++*this;
}
~TrackerAdapterIterator()
{
// safe to call for m_iter_id == -1
TrackerDelIter(m_tracker, m_iter_id);
}
// move only because it owns m_iter_id
TrackerAdapterIterator(TrackerAdapterIterator&& other)
: m_tracker(other.m_tracker)
, m_ptr(other.m_ptr)
{
std::swap(m_iter_id, other.m_iter_id);
}
reference operator*() { return *m_ptr; }
pointer operator->() { return m_ptr; }
TrackerAdapterIterator& operator++()
{
m_ptr = nullptr;
TrackerIterNextCandInList(
m_tracker, m_iter_id, (TrackerRef**) (void*) &m_ptr);
return *this;
}
bool operator==(const TrackerAdapterIterator& iter) const
{
return m_ptr == iter.m_ptr;
}
bool operator!=(const TrackerAdapterIterator& iter) const
{
return !(m_ptr == iter.m_ptr);
}
private:
int m_iter_id = -1;
CTracker* m_tracker;
pointer m_ptr;
};
public:
using type = T;
using iterator = TrackerAdapterIterator<false>;
using const_iterator = TrackerAdapterIterator<true>;
// Takes ownership of tracker id: list_id
explicit TrackerAdapter(CTracker* tracker, int list_id)
: m_tracker(tracker)
, m_list_id(list_id)
{
}
~TrackerAdapter()
{
TrackerDelList(m_tracker, m_list_id);
}
iterator begin() { return iterator(m_tracker, m_list_id); }
const_iterator begin() const { return const_iterator(m_tracker, m_list_id); }
iterator end() { return iterator(); }
const_iterator end() const { return const_iterator(); }
private:
CTracker* m_tracker;
int m_list_id;
};
} // namespace pymol
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