Ok i forgot the menu, all done i guess, now yes do doxyfile

include/linkedlist.h

@@ -46,6 +46,54 @@ enum class LinkedListErr {
     LINKEDLIST_EMPTY,          /**< The list is empty */
 };
 
+
+/**
+ * @brief Converts a LinkedListErr value to its string representation.
+ *
+ * Provides a human-readable, null-terminated string corresponding to
+ * the given LinkedListErr enumeration value. This function is primarily
+ * intended for logging, debugging, and formatting purposes (e.g., with
+ * std::format / std::print).
+ *
+ * @param err The LinkedListErr value to convert.
+ *
+ * @return const char* A pointer to a statically allocated string literal
+ * representing the error. The returned pointer remains valid for the
+ * lifetime of the program and must not be freed.
+ *
+ * @note This function does not throw exceptions.
+ * @note If an unknown or invalid enumeration value is provided, the
+ *       string "UNKNOWN_ERROR" is returned.
+ *
+ * @see std::formatter<LinkedListErr>
+ */
+[[nodiscard]] inline const char* to_string(LinkedListErr err) {
+    switch (err) {
+        case LinkedListErr::LINKEDLIST_OK:
+            return "OK";
+        case LinkedListErr::LINKEDLIST_BAD_ALLOC:
+            return "The program couldn't allocate memory for the list.";
+        case LinkedListErr::LINKEDLIST_OUT_OF_BOUNDS:
+            return "The index is out of bounds.";
+        case LinkedListErr::LINKEDLIST_INVALID_SIZE:
+            return "Is an invalid size fo the list.";
+        case LinkedListErr::LINKEDLIST_NOT_FOUND:
+            return "The value was not found.";
+        case LinkedListErr::LINKEDLIST_EMPTY:
+            return "The list is empty";
+        default:
+            return "UNKNOWN_ERROR";
+    }
+}
+
+template <>
+struct std::formatter<LinkedListErr> : std::formatter<const char*> {
+
+    auto format(LinkedListErr err, format_context& ctx) const {
+        return std::formatter<const char*>::format(to_string(err), ctx);
+    }
+};
+
 /**
  * @brief Node of a singly linked list.
  *
@@ -172,6 +220,15 @@ public:
      * @return size_t Number of stored elements.
      */
     size_t len();
+
+    /**
+     * @brief Clears the list by deleting all its elements.
+     *
+     * Frees all nodes and resets the list to an empty state.
+     *
+     * @note After this call, the list size is 0 and both head and tail are nullptr.
+     */
+    void clear();
 };
 
 template <LinkedListSupported T>
@@ -431,4 +488,19 @@ bool LinkedList<T>::is_empty() {
     return this->len() < 1;
 }
 
+template <LinkedListSupported T>
+void LinkedList<T>::clear() {
+    Node<T>* current = head;
+
+    while (current != nullptr) {
+        Node<T>* next = current->next;
+        delete current;
+        current = next;
+    }
+
+    head = nullptr;
+    tail = nullptr;
+    size = 0;
+}
+
 #endif // !