this is so ass tho ngl

2/linked list by hand.cpp

@@ -12,7 +12,7 @@ public:
 
     node(int data) : data(data), next(nullptr) {}
     node(int data, std::unique_ptr<node> next) : data(data), next(std::move(next)) {}
-    ~node() {}
+    // ~node() {}
 };
 class linked_list
 {
@@ -28,20 +28,14 @@ public:
         }
     }
 
-    linked_list(std::initializer_list<int> v) : head(nullptr)
-    {
-        for (int i : v)
-        {
-            append(i);
-        }
-    }
-
+    linked_list(std::initializer_list<int> v) : linked_list(std::vector<int>(v)) {}
 
     void append(int x) // prepend
     {
         auto temp = std::make_unique<node>(x, std::move(head));
         head = std::move(temp);
     }
+
     /// Pops the head of the linked list and returns the value in x.
     ///
     /// If the linked list is empty, returns false. Otherwise, returns true.
@@ -70,27 +64,27 @@ public:
         }
         return *this;
     }
+
     node *tail() const
     {
         node *temp = head.get();
+        if (!temp) return nullptr;
         while (temp->next != nullptr)
         {
             temp = temp->next.get();
         }
         return temp;
     }
-    linked_list &add(const linked_list &l)
-    {
-        std::vector<int> v = l.view();
-        while (v.size() > 0)
-        {
-            append(v.back());
-            v.pop_back();
-        }
-        // delete v?
-
-        return *this;
+    // what did i do to my argument
+    void add(const linked_list &l)
+    {   
+        if (!l.head) return;
+        node* l_tail = l.tail(); // valid cuz check above
+        l_tail->next = std::move(head);
+        head = std::make_unique<node>(l.head);
+        // return *this;
     }
+
     linked_list &add(std::initializer_list<int> l)
     {
         for (int i : l)
@@ -133,7 +127,7 @@ int main(int argc, char const *argv[])
     l.append(4);
     l.append(5);
     std::cout << l << std::endl;
-    int x = l.pop().value();
+    int x = l.pop().value(); // should be 5
     std::cout << x << std::endl;
     linked_list l2 = {6, 7, 8, 9};
     l.add(l2);