shortened the code in traits/traits7.rs

exercises/traits/traits7.rs

@@ -6,28 +6,24 @@
 
 // I AM NOT DONE
 
-#[allow(unused_imports)]
-use std::fmt::{Debug, Formatter};
+use std::fmt::{Debug};
 
 /// Struct representing a house
-// TODO: Complete the Code
-#[derive(??, Default)]
+#[derive(Default)]
 struct House {
     area_sqft: u32,
     purchase_date: String,
 }
 
 /// Struct representing a vehicle
-// TODO: Complete the Code
-#[derive(??, Default)]
+#[derive(Default)]
 struct Vehicle {
     name: String,
     model: String,
     purchase_date: String,
 }
 
-// TODO: Complete the code
-trait Details: ?? {
+trait Details {
     fn summary(&self) -> String;
 }
 
@@ -64,6 +60,13 @@ fn foo(flag: bool) -> ?? {
     }
 }
 
+impl Debug for dyn Details {
+    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
+    // print the summary of the struct returned from the function `foo`
+        write!(f, "{}", ??) // TODO: Complete the code
+    }
+}
+
 pub fn main() {
     let x = foo(true);
     println!("{:?}", x);

info.toml

@@ -754,8 +754,9 @@ path = "exercises/traits/traits7.rs"
 mode = "compile"
 hint = """
 To make the function printable on console using `:?` symbol. Use the `Debug` trait for the `Details` trait.
-Here, if the trait implements `Debug` trait then the corresponding struct types also has to implement `Debug` trait,
-otherwise the function returning trait object will not be printable on console.
+Here, the trait object has to implement `Debug` trait, otherwise the function returning trait object will 
+not be printable on console using {:?} symbol.
+
 See the documentation at: https://doc.rust-lang.org/std/fmt/trait.Debug.html
 """