Iterator class:
public:
Iterator & operator ++()
{
do Increment();
while (node_ != nullptr && node_->IsDead());
return *this;
}
Iterator & operator++(int)
{
Iterator i = *this;
operator ++();
return i;
}
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Iterator class:
public:
Iterator & operator --()
{
do Decrement();
while (node_ != nullptr && node_->IsDead());
return *this;
}
Iterator & operator++(int)
{
Iterator i = *this;
operator --();
return i;
}
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