template < typename...Args > void emplace_back(Args && ... args)
{
node *newdat = new node(mBack.backward(), new T(args...), &mBack);
mBack.backward()->forward(newdat);
mBack.backward(newdat);
++mSize;
}
void push_back(const T & dat)
{
node *newdat = new node(mBack.backward(), new T(dat), &mBack);
mBack.backward()->forward(newdat);
mBack.backward(newdat);
++mSize;
}
void pop_back()
{
if (mSize == 0)
return;
node *current = mBack.backward();
current->backward()->forward(&mBack);
mBack.backward(current->backward());
delete current->data();
delete current;
--mSize;
}
node(const node & obj):mFront(obj.forward()), mBack(obj.backward()), mDat(obj.data())
{
}
reverse_iterator rbegin()
{
return reverse_iterator(mBack.backward());
}
T & back()
{
if(!mBack.backward()->usable())
throw cov::error("E0005");
return *mBack.backward()->data();
}