reimplementing [] based on Vec<T>.get() for safer return values

src/matrix/addition.rs

@@ -1,12 +0,0 @@
-use super::Matrix;
-use std::ops::Add;
-
-impl Add for Matrix {
-    type Output = Matrix;
-
-    fn add(self, other: Matrix) -> Matrix {
-
-
-    }
-
-}

src/matrix/mod.rs

@@ -42,7 +42,22 @@ impl Index<(usize, usize)> for Matrix {
         //Since it returns an Option, its not as simple as a get
         let row : Option<&Vec<i32>> = self.elements.get(index.0); //the 'T' in Option<T> from get is a reference
         //Now, we need to unpack the Option
-        match row
+        match row {
+            // Lifetimes???
+
+            // Turbofish is used in expressions
+            Some(row) => {
+                //Within THIS match:
+                let column : Option<&i32> = row.get(index.1);
+                match column {
+                    Some(entry) => Some(entry),
+
+                    None => &None,
+                }
+
+            },
+            None => &None,
+        }
     }
 }