Added boost header

test/external/boost/ptr_container/nullable.hpp

@@ -0,0 +1,73 @@
+//
+// Boost.Pointer Container
+//
+//  Copyright Thorsten Ottosen 2003-2005. Use, modification and
+//  distribution is subject to the Boost Software License, Version
+//  1.0. (See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+// For more information, see http://www.boost.org/libs/ptr_container/
+//
+
+
+#ifndef BOOST_INDIRECT_CONTAINER_NULLABLE_HPP
+#define BOOST_INDIRECT_CONTAINER_NULLABLE_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif
+
+#include <boost/type_traits/detail/yes_no_type.hpp>
+#include <boost/mpl/eval_if.hpp>
+#include <boost/mpl/identity.hpp>
+#include <boost/config.hpp>
+
+namespace boost
+{
+    
+    template< class T >
+    struct nullable
+    {
+        typedef T type;
+    };   
+
+    namespace ptr_container_detail
+    {
+        template< class T >
+        type_traits::yes_type is_nullable( const nullable<T>* );
+
+        type_traits::no_type is_nullable( ... );        
+    }
+
+    template< class T >
+    struct is_nullable
+    {
+    private:
+            BOOST_STATIC_CONSTANT( T*, var );
+    public:
+
+#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400)  
+#pragma warning(push)  
+#pragma warning(disable:6334)  
+#endif  
+
+            BOOST_STATIC_CONSTANT(bool, value = sizeof( ptr_container_detail::is_nullable( var ) ) 
+                                                == sizeof( type_traits::yes_type ) );
+#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400)  
+#pragma warning(pop)  
+#endif  
+            
+    };
+    
+    template< class T >
+    struct remove_nullable
+    {
+        typedef BOOST_DEDUCED_TYPENAME mpl::eval_if< is_nullable<T>,
+                                                      T,
+                                            mpl::identity<T> >::type
+            type;
+    };
+
+}
+
+#endif