Update 08-01

listings/ch08-common-collections/listing-08-04/src/main.rs

@@ -3,7 +3,7 @@ fn main() {
     {
         let v = vec![1, 2, 3, 4];
 
-        // do stuff with v
-    } // <- v goes out of scope and is freed here
+        // vで作業をする
+    } // <- vはここでスコープを抜け、解放される
       // ANCHOR_END: here
 }

listings/ch08-common-collections/listing-08-05/src/main.rs

@@ -6,7 +6,9 @@ fn main() {
     println!("The third element is {}", third);
 
     match v.get(2) {
+        //                      "3つ目の要素は{}です"
         Some(third) => println!("The third element is {}", third),
+        //               "3つ目の要素はありません。"
         None => println!("There is no third element."),
     }
     // ANCHOR_END: here

listings/ch08-common-collections/listing-08-07/output.txt

@@ -1,16 +1,20 @@
 $ cargo run
    Compiling collections v0.1.0 (file:///projects/collections)
 error[E0502]: cannot borrow `v` as mutable because it is also borrowed as immutable
+(エラー: 不変としても借用されているので、`v`を可変で借用できません)
  --> src/main.rs:6:5
   |
 4 |     let first = &v[0];
   |                  - immutable borrow occurs here
+  |                   (不変借用はここで発生しています)
 5 | 
 6 |     v.push(6);
   |     ^^^^^^^^^ mutable borrow occurs here
+  |              (可変借用はここで発生しています)
 7 | 
 8 |     println!("The first element is: {}", first);
   |                                          ----- immutable borrow later used here
+  |                                               (その後、不変借用はここで使われています)
 
 error: aborting due to previous error