//iterator() creates a new Iterator over this list. It will //initially be referring to the first value in the list, unless the //list is empty, in which case it will be considered both "past start" //and "past end". template typename DoublyLinkedList::Iterator DoublyLinkedList::iterator() { //return iterator(head); } //constIterator() creates a new ConstIterator over this list. It will //initially be referring to the first value in the list, unless the //list is empty, in which case it will be considered both "past start" //and "past end". template typename DoublyLinkedList::ConstIterator DoublyLinkedList::constIterator() const { //return constIterator(head); } //Initializes a newly-constructed IteratorBase to operate on //the given list. It will initially be referring to the first //value in the list, unless the list is empty, in which case //it will be considered to be both "past start" and "past end". //template DoublyLinkedList::IteratorBase::IteratorBase(const DoublyLinkedList& list) noexcep
Computer Science
//iterator() creates a new Iterator over this list. It will
//initially be referring to the first value in the list, unless the
//list is empty, in which case it will be considered both "past start"
//and "past end".
template <typename ValueType>
typename DoublyLinkedList<ValueType>::Iterator DoublyLinkedList<ValueType>::iterator()
{
//return iterator(head);
}
//constIterator() creates a new ConstIterator over this list. It will
//initially be referring to the first value in the list, unless the
//list is empty, in which case it will be considered both "past start"
//and "past end".
template <typename ValueType>
typename DoublyLinkedList<ValueType>::ConstIterator DoublyLinkedList<ValueType>::constIterator() const
{
//return constIterator(head);
}
//Initializes a newly-constructed IteratorBase to operate on
//the given list. It will initially be referring to the first
//value in the list, unless the list is empty, in which case
//it will be considered to be both "past start" and "past end".
//template <typename ValueType>
DoublyLinkedList<ValueType>::IteratorBase::IteratorBase(const DoublyLinkedList& list) noexcept
{
}
Need implementation on those 3 functions, show all the steps with explanation in c++
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