week10 lecture 2

Lecture/Week10/main.cpp

@@ -6,6 +6,7 @@ class Row{
         int size = 0;
         double * data;
 
+        // constructor
         Row(int size){
             cout << "constructor" << endl;
             this->size = size;
@@ -22,6 +23,14 @@ class Row{
             }
         }
 
+        // move copy constructor
+        Row(Row&& from){
+            cout << "move copy constructor" << endl;
+            this->size = from.size;
+            this->data = from.data;
+            from.data = nullptr;
+        }
+
         // assignment operator (non-move)
         Row operator=(const Row& rhs){
             if(this != &rhs){
@@ -35,15 +44,35 @@ class Row{
             return *this;
         }
 
+
+        Row& operator=(Row&& from){
+            cout << "assignment operator" << endl;
+            if(this != &from){
+                delete[] data;
+                //this-size = from.size; // gives error
+                this->data = from.data;
+                from.data = nullptr;
+            }
+            return *this;
+        }
+
         ~Row(){
             delete[] data;
         }
         
 };
 
+
+void swap(Row& R1, Row& R2){
+    Row temp = move(R1);
+    R1 = std::move(R2);
+    R2 = std::move(temp);
+}
+
 int main(){
 
     Row R1(2);
-    Row R2(R1);
+    Row R2(3);
+    swap(R1,R2);
     return 0;
 }