add examle

src/main.rs

@@ -48,7 +48,7 @@ impl TryFrom<u32> for MyType2Val {
         match value {
             0x1 => Ok(MyType2Val::A),
             0x2 => Ok(MyType2Val::B),
-            _ => panic!()
+            _ => panic!(),
         }
     }
 }
@@ -65,7 +65,11 @@ impl MyTrait for MyType2 {
 
 fn main() {
     println!("Hello, world!");
-    
+
     let x = MyType1 {};
     println!("{}", x.converted());
+
+    let y = MyType2Val::A;
+    let _y = <MyType2Val as TryInto<u32>>::try_into(y).unwrap();
+    let _y = <MyType2Val as Into<u32>>::into(y);
 }