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+//  (C) Copyright Gennadiy Rozental 2011-2014.
+//  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 single element monomorphic dataset
+// ***************************************************************************
+
+#ifndef BOOST_TEST_DATA_MONOMORPHIC_SINGLETON_HPP_102211GER
+#define BOOST_TEST_DATA_MONOMORPHIC_SINGLETON_HPP_102211GER
+
+// Boost.Test
+#include <boost/test/data/config.hpp>
+#include <boost/test/data/monomorphic/dataset.hpp>
+
+#include <boost/test/detail/suppress_warnings.hpp>
+
+//____________________________________________________________________________//
+
+namespace boost {
+namespace unit_test {
+namespace data {
+namespace monomorphic {
+
+// ************************************************************************** //
+// **************                    singleton                  ************** //
+// ************************************************************************** //
+
+/// Models a single element data set
+template<typename T>
+class singleton : public monomorphic::dataset<typename boost::decay<T>::type> {
+    typedef monomorphic::dataset<typename boost::decay<T>::type> base;
+    typedef typename base::iter_ptr  iter_ptr;
+
+    struct iterator : public base::iterator {
+        // Constructor
+        explicit            iterator( singleton<T> const& owner ) 
+        : m_owner( owner ) 
+        {}
+
+        // forward iterator interface 
+        virtual typename base::data_type const&
+                            operator*()     { return m_owner.value(); }
+        virtual void        operator++()    {}
+
+    private:
+        singleton<T> const& m_owner;
+    };
+
+public:
+    enum { arity = 1 };
+
+#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
+    //! Constructor
+    explicit                singleton( T&& value ) : m_value( std::forward<T>( value ) ) {}
+
+    //! Move constructor
+    singleton( singleton&& s ) : m_value( std::forward<T>( s.m_value ) ) {}
+#else
+    // Constructor
+    explicit                singleton( T const& value ) : m_value( value ) {}
+#endif
+
+    // Access methods
+    T const&                value() const           { return m_value; }
+
+    // dataset interface
+    virtual data::size_t    size() const            { return 1; }
+    virtual iter_ptr        begin() const           { return boost::make_shared<iterator>( *this ); }
+
+private:
+    // Data members
+    T               m_value;
+};
+
+// a singleton is a dataset
+template<typename T>
+struct is_dataset<singleton<T> > : mpl::true_ {};
+
+} // namespace monomorphic
+
+
+
+/// @overload boost::unit_test::data::make()
+template<typename T>
+inline typename BOOST_TEST_ENABLE_IF<!is_forward_iterable<T>::value && 
+                                     !monomorphic::is_dataset<T>::value &&
+                                     !boost::is_array< typename boost::remove_reference<T>::type >::value, 
+                                     monomorphic::singleton<T>
+>::type
+#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
+make( T&& v )
+{
+    return monomorphic::singleton<T>( std::forward<T>( v ) );
+}
+#else
+make( T const& v )
+{
+    return monomorphic::singleton<T>( v );
+}
+#endif
+
+
+/// @overload boost::unit_test::data::make
+inline monomorphic::singleton<char*> make( char* str )
+{
+#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
+    return monomorphic::singleton<char*>( std::move(str) );
+#else
+    return monomorphic::singleton<char*>( str );
+#endif
+}
+
+
+/// @overload boost::unit_test::data::make
+inline monomorphic::singleton<char const*> make( char const* str )
+{
+#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
+    return monomorphic::singleton<char const*>( std::move(str) );
+#else
+    return monomorphic::singleton<char const*>( str );
+#endif
+}
+
+
+
+} // namespace data
+} // namespace unit_test
+} // namespace boost
+
+#include <boost/test/detail/enable_warnings.hpp>
+
+#endif // BOOST_TEST_DATA_MONOMORPHIC_SINGLETON_HPP_102211GER
+