1 files changed, 87 insertions, 0 deletions
diff --git a/boost/test/data/traits.hpp b/boost/test/data/traits.hpp
new file mode 100644
index 0000000000..eee52fdab5
--- /dev/null
+++ b/boost/test/data/traits.hpp
@@ -0,0 +1,87 @@
+//  (C) Copyright Gennadiy Rozental 2001.
+//  Distributed under 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)
+
+//  See http://www.boost.org/libs/test for the library home page.
+//
+/// @file
+/// Defines helper traits
+// ***************************************************************************
+
+#ifndef BOOST_TEST_DATA_TRAITS_HPP_102211GER
+#define BOOST_TEST_DATA_TRAITS_HPP_102211GER
+
+// Boost.Test
+#include <boost/test/data/config.hpp>
+#include <boost/test/data/monomorphic/fwd.hpp>
+
+// STL
+#include <tuple>
+
+#include <boost/test/detail/suppress_warnings.hpp>
+
+//____________________________________________________________________________//
+
+namespace boost {
+namespace unit_test {
+namespace data {
+
+// ************************************************************************** //
+// **************                  data::traits                ************** //
+// ************************************************************************** //
+
+template<typename T>
+struct traits {
+    // type of the reference to sample returned by iterator
+    typedef T const&    ref_type;
+
+    template<typename Action>
+    static void
+    invoke_action( ref_type arg, Action const& action )
+    {
+        action( arg );
+    }
+};
+
+//____________________________________________________________________________//
+
+// !! ?? reimplement using variadics
+template<typename T1, typename T2>
+struct traits<std::tuple<T1,T2>> {
+    // type of the reference to sample returned by iterator
+    typedef std::tuple<T1 const&,T2 const&>     ref_type;
+
+    template<typename Action>
+    static void
+    invoke_action( ref_type arg, Action const& action )
+    {
+        action( std::get<0>(arg), std::get<1>(arg) );
+    }
+};
+
+//____________________________________________________________________________//
+
+template<typename T1, typename T2, typename T3>
+struct traits<std::tuple<T1,T2,T3>> {
+    // type of the reference to sample returned by iterator
+    typedef std::tuple<T1 const&,T2 const&,T3 const&>   ref_type;
+
+    template<typename Action>
+    static void
+    invoke_action( ref_type arg, Action const& action )
+    {
+        action( std::get<0>(arg), std::get<1>(arg), std::get<2>(arg) );
+    }
+};
+
+//____________________________________________________________________________//
+
+} // namespace data
+} // namespace unit_test
+} // namespace boost
+
+#include <boost/test/detail/enable_warnings.hpp>
+
+#endif // BOOST_TEST_DATA_TRAITS_HPP_102211GER
+