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#pragma once
template <typename T>
class IOpaqueIterator {
public:
virtual ~IOpaqueIterator() = default;
virtual bool HasNext() const = 0;
virtual T Next() = 0;
};
template <typename TContainer>
class ContainerOpaqueIterator : public IOpaqueIterator<typename TContainer::reference_type> {
private:
typename TContainer::iterator mIter;
typename TContainer::const_iterator mEnd;
public:
ContainerOpaqueIterator(TContainer& container)
: mIter{ container.begin() }
, mEnd{ container.end() } {}
virtual bool HasNext() const override {
return mIter != mEnd;
}
virtual typename TContainer::reference_type Next() override {
auto result = *mIter;
++mIter;
return result;
}
};
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