From 7b64409dfb1e399c7c980fd3227d5c0432c39e6c Mon Sep 17 00:00:00 2001
From: valmat <ufabiz@gmail.com>
Date: Thu, 19 Jun 2014 00:03:46 +0600
Subject: implementation issue #97

---
 include/class.h | 30 ++++++++++++++++++++++++++++--
 1 file changed, 28 insertions(+), 2 deletions(-)

(limited to 'include')

diff --git a/include/class.h b/include/class.h
index e0316df..cffc7bd 100644
--- a/include/class.h
+++ b/include/class.h
@@ -201,6 +201,32 @@ public:
     Class<T> &extends(const Class<CLASS> &base) { ClassBase::extends(base); return *this; }
     
 private:
+    /**
+     *  Method to create the object if it is default constructable
+     *  @param  orig
+     *  @return Base*
+     */
+    template <typename X = T>
+    typename std::enable_if<std::is_default_constructible<X>::value, Base*>::type
+    static maybeConstruct()
+    {
+        // create a new instance
+        return new X();
+    }
+
+    /**
+     *  Method to create the object if it is not default constructable
+     *  @param  orig
+     *  @return Base*
+     */
+    template <typename X = T>
+    typename std::enable_if<!std::is_default_constructible<X>::value, Base*>::type
+    static maybeConstruct()
+    {
+        // create empty instance
+        return nullptr;
+    }
+
     /**
      *  Construct a new instance of the object
      *  @return Base
@@ -208,7 +234,7 @@ private:
     virtual Base* construct() const override
     {
         // construct an instance
-        return new T();
+        return maybeConstruct<T>();
     }
     
     /**
@@ -225,7 +251,7 @@ private:
     }
 
     /**
-     *  Method to clone the object if it is copy constructable
+     *  Method to clone the object if it is not copy constructable
      *  @param  orig
      *  @return Base*
      */
-- 
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