part 05: clarify exercise

[rust-101.git] / workspace / src / part05.rs

diff --git a/workspace/src/part05.rs b/workspace/src/part05.rs
index a2da18f2a435b8fe66595de2fecad8aed74ec87b..f1c558720df94135f682ec0d191b1265db91b3ba 100644 (file)
--- a/workspace/src/part05.rs
+++ b/workspace/src/part05.rs
@@ -59,7 +59,7 @@ impl<T: Clone> Clone for SomethingOrNothing<T> {
 }
 
 // **Exercise 05.2**: Write some more functions on `BigInt`. What about a function that returns the number of
-// digits? The number of non-zero digits? The smallest/largest digit?
+// digits? The number of non-zero digits? The smallest/largest digit? Of course, these should all just borrow `self`.
 
 // ## Mutation + aliasing considered harmful (part 2)
 enum Variant {
@@ -72,7 +72,7 @@ fn work_on_variant(mut var: Variant, text: String) {
         Variant::Number(ref mut n) => ptr = n,
         Variant::Text(_) => return,
     }
-    /* var = Variant::Text(text); */
+    /* var = Variant::Text(text); */                                /* BAD! */
     *ptr = 1337;
 }