structs3 solution

exercises/07_structs/structs3.rs

@@ -1,6 +1,5 @@
 // Structs contain data, but can also have logic. In this exercise we have
-// defined the Package struct and we want to test some logic attached to it.
-// Make the code compile and the tests pass!
+// defined the `Package` struct and we want to test some logic attached to it.
 
 #[derive(Debug)]
 struct Package {
@@ -10,26 +9,28 @@ struct Package {
 }
 
 impl Package {
-    fn new(sender_country: String, recipient_country: String, weight_in_grams: u32) -> Package {
+    fn new(sender_country: String, recipient_country: String, weight_in_grams: u32) -> Self {
         if weight_in_grams < 10 {
-            // This is not how you should handle errors in Rust,
-            // but we will learn about error handling later.
-            panic!("Can not ship a package with weight below 10 grams.")
-        } else {
-            Package {
-                sender_country,
-                recipient_country,
-                weight_in_grams,
-            }
+            // This isn't how you should handle errors in Rust, but we will
+            // learn about error handling later.
+            panic!("Can't ship a package with weight below 10 grams");
+        }
+
+        Self {
+            sender_country,
+            recipient_country,
+            weight_in_grams,
         }
     }
 
-    fn is_international(&self) -> ??? {
-        // Something goes here...
+    // TODO: Add the correct return type to the function signature.
+    fn is_international(&self) {
+        // TODO: Read the tests that use this method to find out when a package is concidered international.
     }
 
-    fn get_fees(&self, cents_per_gram: u32) -> ??? {
-        // Something goes here...
+    // TODO: Add the correct return type to the function signature.
+    fn get_fees(&self, cents_per_gram: u32) {
+        // TODO: Calculate the package's fees.
     }
 }