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AK: Add insert_{before,after}(iterator, value) to SinglyLinkedList
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@ -194,6 +194,58 @@ public:
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delete iterator.m_node;
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}
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void insert_before(Iterator iterator, const T& value)
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{
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auto* node = new Node(value);
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node->next = iterator.m_node;
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if (m_head == iterator.m_node)
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m_head = node;
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if (iterator.m_prev)
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iterator.m_prev->next = node;
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}
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void insert_before(Iterator iterator, T&& value)
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{
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auto* node = new Node(move(value));
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node->next = iterator.m_node;
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if (m_head == iterator.m_node)
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m_head = node;
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if (iterator.m_prev)
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iterator.m_prev->next = node;
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}
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void insert_after(Iterator iterator, const T& value)
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{
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if (iterator.is_end()) {
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append(value);
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return;
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}
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auto* node = new Node(value);
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node->next = iterator.m_node->next;
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iterator.m_node->next = node;
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if (m_tail == iterator.m_node)
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m_tail = node;
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}
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void insert_after(Iterator iterator, T&& value)
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{
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if (iterator.is_end()) {
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append(value);
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return;
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}
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auto* node = new Node(move(value));
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node->next = iterator.m_node->next;
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iterator.m_node->next = node;
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if (m_tail == iterator.m_node)
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m_tail = node;
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}
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private:
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Node* head() { return m_head; }
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const Node* head() const { return m_head; }
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