From 29780abd103a053240078935738a5cf7f8a95a55 Mon Sep 17 00:00:00 2001
From: Ivan Sanz-Carasa <ivansanzcarasa@gmail.com>
Date: Wed, 12 Sep 2018 13:11:52 +0200
Subject: [PATCH] solution: rvalues respect polymorphism

---
 README.md | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/README.md b/README.md
index 8ab54c0..e131f6e 100644
--- a/README.md
+++ b/README.md
@@ -68,14 +68,15 @@ int main()
     X* pX = nullptr;
 
     // Begin 
-    if (i == 0)
-      pX = new X0;
-    else if (i == 1)
-      pX = new X1;
-    else 
-      pX = new X2;
-      
-    std::unique_ptr<X> x{pX};    
+    X&& instance =
+        i == 0 ? (X&&)X0{} :
+        i == 1 ? (X&&)X1{} :
+        (X&&)X2{};
+    
+    // we could get rid of ptrs and use normal calls
+    // instance.Process();
+    
+    pX = &instance;
     // End
 
     pX->Process();