From 4b40812e2600a969843f97401e53a53a832d1406 Mon Sep 17 00:00:00 2001
From: Jason Turner <lefticus@gmail.com>
Date: Sun, 6 Sep 2009 02:09:19 +0000
Subject: [PATCH] Add const_var helper function for making const values.

---
 .../chaiscript/dispatchkit/boxed_value.hpp    | 24 +++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/include/chaiscript/dispatchkit/boxed_value.hpp b/include/chaiscript/dispatchkit/boxed_value.hpp
index e003fc52..337f68a5 100644
--- a/include/chaiscript/dispatchkit/boxed_value.hpp
+++ b/include/chaiscript/dispatchkit/boxed_value.hpp
@@ -756,6 +756,30 @@ namespace chaiscript
       return Boxed_Value(t);
     }
 
+  template<typename T>
+    Boxed_Value const_var(T *t)
+    {
+      return Boxed_Value( const_cast<typename boost::add_const<T>::type>(t) );
+    }
+
+  template<typename T>
+    Boxed_Value const_var(const boost::shared_ptr<T> &t)
+    {
+      return Boxed_Value( boost::const_pointer_cast<typename boost::add_const<T>::type>(t) );
+    }
+
+  template<typename T>
+    Boxed_Value const_var(const boost::reference_wrapper<T> &t)
+    {
+      return Boxed_Value( boost::cref(t.get()) );
+    }
+
+  template<typename T>
+    Boxed_Value const_var(const T &t)
+    {
+      return Boxed_Value(boost::shared_ptr<typename boost::add_const<T>::type >(new T(t)));
+    }
+
   /**
    * Return true if the two Boxed_Values share the same internal type
    */