diff --git a/include/boost/concept/assert.hpp b/include/boost/concept/assert.hpp
new file mode 100644
index 0000000..cf98179
--- /dev/null
+++ b/include/boost/concept/assert.hpp
@@ -0,0 +1,45 @@
+// Copyright David Abrahams 2006. 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)
+#ifndef BOOST_CONCEPT_ASSERT_DWA2006430_HPP
+# define BOOST_CONCEPT_ASSERT_DWA2006430_HPP
+
+# include <boost/config.hpp>
+# include <boost/detail/workaround.hpp>
+
+// The old protocol used a constraints() member function in concept
+// checking classes.  If the compiler supports SFINAE, we can detect
+// that function and seamlessly support the old concept checking
+// classes.  In this release, backward compatibility with the old
+// concept checking classes is enabled by default, where available.
+// The old protocol is deprecated, though, and backward compatibility
+// will no longer be the default in the next release.
+
+# if !defined(BOOST_NO_OLD_CONCEPT_SUPPORT)                                         \
+    && !defined(BOOST_NO_SFINAE)                                                    \
+                                                                                    \
+    && !(BOOST_WORKAROUND(__GNUC__, == 3) && BOOST_WORKAROUND(__GNUC_MINOR__, < 4))
+
+// Note: gcc-2.96 through 3.3.x have some SFINAE, but no ability to
+// check for the presence of particularmember functions.
+
+#  define BOOST_OLD_CONCEPT_SUPPORT
+
+# endif
+
+# ifdef BOOST_MSVC
+#  include <boost/concept/detail/msvc.hpp>
+# elif BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
+#  include <boost/concept/detail/borland.hpp>
+# else 
+#  include <boost/concept/detail/general.hpp>
+# endif
+
+  // Usage, in class or function context:
+  //
+  //     BOOST_CONCEPT_ASSERT((UnaryFunctionConcept<F,bool,int>));
+  //
+# define BOOST_CONCEPT_ASSERT(ModelInParens) \
+    BOOST_CONCEPT_ASSERT_FN(void(*)ModelInParens)
+
+#endif // BOOST_CONCEPT_ASSERT_DWA2006430_HPP
diff --git a/include/boost/concept/detail/backward_compatibility.hpp b/include/boost/concept/detail/backward_compatibility.hpp
new file mode 100644
index 0000000..66d573e
--- /dev/null
+++ b/include/boost/concept/detail/backward_compatibility.hpp
@@ -0,0 +1,16 @@
+// Copyright David Abrahams 2009. 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)
+#ifndef BOOST_CONCEPT_BACKWARD_COMPATIBILITY_DWA200968_HPP
+# define BOOST_CONCEPT_BACKWARD_COMPATIBILITY_DWA200968_HPP
+
+namespace boost
+{
+  namespace concepts {}
+
+# if defined(BOOST_HAS_CONCEPTS) && !defined(BOOST_CONCEPT_NO_BACKWARD_KEYWORD)
+  namespace concept = concepts;
+# endif 
+} // namespace boost::concept
+
+#endif // BOOST_CONCEPT_BACKWARD_COMPATIBILITY_DWA200968_HPP
diff --git a/include/boost/concept/detail/borland.hpp b/include/boost/concept/detail/borland.hpp
new file mode 100644
index 0000000..300d5d4
--- /dev/null
+++ b/include/boost/concept/detail/borland.hpp
@@ -0,0 +1,30 @@
+// Copyright David Abrahams 2006. 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)
+#ifndef BOOST_CONCEPT_DETAIL_BORLAND_DWA2006429_HPP
+# define BOOST_CONCEPT_DETAIL_BORLAND_DWA2006429_HPP
+
+# include <boost/preprocessor/cat.hpp>
+# include <boost/concept/detail/backward_compatibility.hpp>
+
+namespace boost { namespace concepts {
+
+template <class ModelFnPtr>
+struct require;
+
+template <class Model>
+struct require<void(*)(Model)>
+{
+    enum { instantiate = sizeof((((Model*)0)->~Model()), 3) };
+};
+
+#  define BOOST_CONCEPT_ASSERT_FN( ModelFnPtr )         \
+  enum                                                  \
+  {                                                     \
+      BOOST_PP_CAT(boost_concept_check,__LINE__) =      \
+      boost::concepts::require<ModelFnPtr>::instantiate  \
+  }
+
+}} // namespace boost::concept
+
+#endif // BOOST_CONCEPT_DETAIL_BORLAND_DWA2006429_HPP
diff --git a/include/boost/concept/detail/concept_def.hpp b/include/boost/concept/detail/concept_def.hpp
new file mode 100644
index 0000000..750561e
--- /dev/null
+++ b/include/boost/concept/detail/concept_def.hpp
@@ -0,0 +1,34 @@
+// Copyright David Abrahams 2006. 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)
+#ifndef BOOST_CONCEPT_DETAIL_CONCEPT_DEF_DWA200651_HPP
+# define BOOST_CONCEPT_DETAIL_CONCEPT_DEF_DWA200651_HPP
+# include <boost/preprocessor/seq/for_each_i.hpp>
+# include <boost/preprocessor/seq/enum.hpp>
+# include <boost/preprocessor/comma_if.hpp>
+# include <boost/preprocessor/cat.hpp>
+#endif // BOOST_CONCEPT_DETAIL_CONCEPT_DEF_DWA200651_HPP
+
+// BOOST_concept(SomeName, (p1)(p2)...(pN))
+//
+// Expands to "template <class p1, class p2, ...class pN> struct SomeName"
+//
+// Also defines an equivalent SomeNameConcept for backward compatibility.
+// Maybe in the next release we can kill off the "Concept" suffix for good.
+# define BOOST_concept(name, params)                                            \
+    template < BOOST_PP_SEQ_FOR_EACH_I(BOOST_CONCEPT_typename,~,params) >       \
+    struct name; /* forward declaration */                                      \
+                                                                                \
+    template < BOOST_PP_SEQ_FOR_EACH_I(BOOST_CONCEPT_typename,~,params) >       \
+    struct BOOST_PP_CAT(name,Concept)                                           \
+      : name< BOOST_PP_SEQ_ENUM(params) >                                       \
+    {                                                                           \
+    };                                                                          \
+                                                                                \
+    template < BOOST_PP_SEQ_FOR_EACH_I(BOOST_CONCEPT_typename,~,params) >       \
+    struct name                                                                
+    
+// Helper for BOOST_concept, above.
+# define BOOST_CONCEPT_typename(r, ignored, index, t) \
+    BOOST_PP_COMMA_IF(index) typename t
+
diff --git a/include/boost/concept/detail/concept_undef.hpp b/include/boost/concept/detail/concept_undef.hpp
new file mode 100644
index 0000000..713db89
--- /dev/null
+++ b/include/boost/concept/detail/concept_undef.hpp
@@ -0,0 +1,5 @@
+// Copyright David Abrahams 2006. 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)
+# undef BOOST_concept_typename
+# undef BOOST_concept
diff --git a/include/boost/concept/detail/general.hpp b/include/boost/concept/detail/general.hpp
new file mode 100644
index 0000000..525ea65
--- /dev/null
+++ b/include/boost/concept/detail/general.hpp
@@ -0,0 +1,77 @@
+// Copyright David Abrahams 2006. 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)
+#ifndef BOOST_CONCEPT_DETAIL_GENERAL_DWA2006429_HPP
+# define BOOST_CONCEPT_DETAIL_GENERAL_DWA2006429_HPP
+
+# include <boost/config.hpp>
+# include <boost/preprocessor/cat.hpp>
+# include <boost/concept/detail/backward_compatibility.hpp>
+
+# ifdef BOOST_OLD_CONCEPT_SUPPORT
+#  include <boost/concept/detail/has_constraints.hpp>
+#  include <boost/mpl/if.hpp>
+# endif
+
+// This implementation works on Comeau and GCC, all the way back to
+// 2.95
+namespace boost { namespace concepts {
+
+template <class ModelFn>
+struct requirement_;
+
+namespace detail
+{
+  template <void(*)()> struct instantiate {};
+}
+
+template <class Model>
+struct requirement
+{
+    static void failed() { ((Model*)0)->~Model(); }
+};
+
+struct failed {};
+
+template <class Model>
+struct requirement<failed ************ Model::************>
+{
+    static void failed() { ((Model*)0)->~Model(); }
+};
+
+# ifdef BOOST_OLD_CONCEPT_SUPPORT
+
+template <class Model>
+struct constraint
+{
+    static void failed() { ((Model*)0)->constraints(); }
+};
+  
+template <class Model>
+struct requirement_<void(*)(Model)>
+  : mpl::if_<
+        concepts::not_satisfied<Model>
+      , constraint<Model>
+      , requirement<failed ************ Model::************>
+    >::type
+{};
+  
+# else
+
+// For GCC-2.x, these can't have exactly the same name
+template <class Model>
+struct requirement_<void(*)(Model)>
+    : requirement<failed ************ Model::************>
+{};
+  
+# endif
+
+#  define BOOST_CONCEPT_ASSERT_FN( ModelFnPtr )             \
+    typedef ::boost::concepts::detail::instantiate<          \
+    &::boost::concepts::requirement_<ModelFnPtr>::failed>    \
+      BOOST_PP_CAT(boost_concept_check,__LINE__)             \
+      BOOST_ATTRIBUTE_UNUSED
+
+}}
+
+#endif // BOOST_CONCEPT_DETAIL_GENERAL_DWA2006429_HPP
diff --git a/include/boost/concept/detail/has_constraints.hpp b/include/boost/concept/detail/has_constraints.hpp
new file mode 100644
index 0000000..a309db3
--- /dev/null
+++ b/include/boost/concept/detail/has_constraints.hpp
@@ -0,0 +1,50 @@
+// Copyright David Abrahams 2006. 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)
+#ifndef BOOST_CONCEPT_DETAIL_HAS_CONSTRAINTS_DWA2006429_HPP
+# define BOOST_CONCEPT_DETAIL_HAS_CONSTRAINTS_DWA2006429_HPP
+
+# include <boost/mpl/bool.hpp>
+# include <boost/detail/workaround.hpp>
+# include <boost/concept/detail/backward_compatibility.hpp>
+
+namespace boost { namespace concepts {
+
+namespace detail
+{ 
+
+// Here we implement the metafunction that detects whether a
+// constraints metafunction exists
+  typedef char yes;
+  typedef char (&no)[2];
+
+  template <class Model, void (Model::*)()>
+  struct wrap_constraints {};
+    
+#if BOOST_WORKAROUND(__SUNPRO_CC, <= 0x580) || defined(__CUDACC__)
+  // Work around the following bogus error in Sun Studio 11, by
+  // turning off the has_constraints function entirely:
+  //    Error: complex expression not allowed in dependent template
+  //    argument expression
+  inline no has_constraints_(...);
+#else
+  template <class Model>
+  inline yes has_constraints_(Model*, wrap_constraints<Model,&Model::constraints>* = 0);
+  inline no has_constraints_(...);
+#endif
+}
+
+// This would be called "detail::has_constraints," but it has a strong
+// tendency to show up in error messages.
+template <class Model>
+struct not_satisfied
+{
+    BOOST_STATIC_CONSTANT(
+        bool
+      , value = sizeof( detail::has_constraints_((Model*)0) ) == sizeof(detail::yes) );
+    typedef mpl::bool_<value> type;
+};
+
+}} // namespace boost::concepts::detail
+
+#endif // BOOST_CONCEPT_DETAIL_HAS_CONSTRAINTS_DWA2006429_HPP
diff --git a/include/boost/concept/detail/msvc.hpp b/include/boost/concept/detail/msvc.hpp
new file mode 100644
index 0000000..078dd22
--- /dev/null
+++ b/include/boost/concept/detail/msvc.hpp
@@ -0,0 +1,123 @@
+// Copyright David Abrahams 2006. 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)
+#ifndef BOOST_CONCEPT_CHECK_MSVC_DWA2006429_HPP
+# define BOOST_CONCEPT_CHECK_MSVC_DWA2006429_HPP
+
+# include <boost/preprocessor/cat.hpp>
+# include <boost/concept/detail/backward_compatibility.hpp>
+# include <boost/config.hpp>
+
+# ifdef BOOST_OLD_CONCEPT_SUPPORT
+#  include <boost/concept/detail/has_constraints.hpp>
+#  include <boost/mpl/if.hpp>
+# endif
+
+# ifdef BOOST_MSVC
+#  pragma warning(push)
+#  pragma warning(disable:4100)
+# endif
+
+namespace boost { namespace concepts {
+
+
+template <class Model>
+struct check
+{
+    virtual void failed(Model* x)
+    {
+        x->~Model();
+    }
+};
+
+# ifndef BOOST_NO_PARTIAL_SPECIALIZATION
+struct failed {};
+template <class Model>
+struct check<failed ************ Model::************>
+{
+    virtual void failed(Model* x)
+    {
+        x->~Model();
+    }
+};
+# endif
+
+# ifdef BOOST_OLD_CONCEPT_SUPPORT
+  
+namespace detail
+{
+  // No need for a virtual function here, since evaluating
+  // not_satisfied below will have already instantiated the
+  // constraints() member.
+  struct constraint {};
+}
+
+template <class Model>
+struct require
+  : mpl::if_c<
+        not_satisfied<Model>::value
+      , detail::constraint
+# ifndef BOOST_NO_PARTIAL_SPECIALIZATION
+      , check<Model>
+# else
+      , check<failed ************ Model::************>
+# endif 
+        >::type
+{};
+      
+# else
+  
+template <class Model>
+struct require
+# ifndef BOOST_NO_PARTIAL_SPECIALIZATION
+    : check<Model>
+# else
+    : check<failed ************ Model::************>
+# endif 
+{};
+  
+# endif
+    
+# if BOOST_WORKAROUND(BOOST_MSVC, == 1310)
+
+//
+// The iterator library sees some really strange errors unless we
+// do things this way.
+//
+template <class Model>
+struct require<void(*)(Model)>
+{
+    virtual void failed(Model*)
+    {
+        require<Model>();
+    }
+};
+
+# define BOOST_CONCEPT_ASSERT_FN( ModelFnPtr )      \
+enum                                                \
+{                                                   \
+    BOOST_PP_CAT(boost_concept_check,__LINE__) =    \
+    sizeof(::boost::concepts::require<ModelFnPtr>)    \
+}
+  
+# else // Not vc-7.1
+  
+template <class Model>
+require<Model>
+require_(void(*)(Model));
+  
+# define BOOST_CONCEPT_ASSERT_FN( ModelFnPtr )          \
+enum                                                    \
+{                                                       \
+    BOOST_PP_CAT(boost_concept_check,__LINE__) =        \
+      sizeof(::boost::concepts::require_((ModelFnPtr)0)) \
+}
+  
+# endif
+}}
+
+# ifdef BOOST_MSVC
+#  pragma warning(pop)
+# endif
+
+#endif // BOOST_CONCEPT_CHECK_MSVC_DWA2006429_HPP
diff --git a/include/boost/concept/requires.hpp b/include/boost/concept/requires.hpp
new file mode 100644
index 0000000..365ce10
--- /dev/null
+++ b/include/boost/concept/requires.hpp
@@ -0,0 +1,93 @@
+// Copyright David Abrahams 2006. 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)
+#ifndef BOOST_CONCEPT_REQUIRES_DWA2006430_HPP
+# define BOOST_CONCEPT_REQUIRES_DWA2006430_HPP
+
+# include <boost/config.hpp>
+# include <boost/concept/assert.hpp>
+# include <boost/preprocessor/seq/for_each.hpp>
+
+namespace boost { 
+
+// unaryfunptr_arg_type from parameter/aux_/parenthesized_type.hpp
+
+namespace ccheck_aux {
+
+// A metafunction that transforms void(*)(T) -> T
+template <class UnaryFunctionPointer>
+struct unaryfunptr_arg_type;
+
+template <class Arg>
+struct unaryfunptr_arg_type<void(*)(Arg)>
+{
+    typedef Arg type;
+};
+
+template <>
+struct unaryfunptr_arg_type<void(*)(void)>
+{
+    typedef void type;
+};
+
+} // namespace ccheck_aux
+
+// Template for use in handwritten assertions
+template <class Model, class More>
+struct requires_ : More
+{
+    BOOST_CONCEPT_ASSERT((Model));
+};
+
+// Template for use by macros, where models must be wrapped in parens.
+// This isn't in namespace detail to keep extra cruft out of resulting
+// error messages.
+template <class ModelFn>
+struct _requires_
+{
+    enum { value = 0 };
+    BOOST_CONCEPT_ASSERT_FN(ModelFn);
+};
+
+template <int check, class Result>
+struct Requires_ : ::boost::ccheck_aux::unaryfunptr_arg_type<Result>
+{
+};
+
+# if BOOST_WORKAROUND(BOOST_INTEL_WIN, BOOST_TESTED_AT(1010))
+#  define BOOST_CONCEPT_REQUIRES_(r,data,t) | (::boost::_requires_<void(*)t>::value)
+# else 
+#  define BOOST_CONCEPT_REQUIRES_(r,data,t) + (::boost::_requires_<void(*)t>::value)
+# endif
+
+#if defined(NDEBUG)
+
+# define BOOST_CONCEPT_REQUIRES(models, result)                                    \
+    typename ::boost::ccheck_aux::unaryfunptr_arg_type<void(*)result>::type
+
+#elif BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
+
+// Same thing as below without the initial typename
+# define BOOST_CONCEPT_REQUIRES(models, result)                                \
+    ::boost::Requires_<                                                        \
+      (0 BOOST_PP_SEQ_FOR_EACH(BOOST_CONCEPT_REQUIRES_, ~, models)),           \
+      ::boost::ccheck_aux::unaryfunptr_arg_type<void(*)result>          \
+                     >::type
+
+#else
+
+// This just ICEs on MSVC6 :(
+# define BOOST_CONCEPT_REQUIRES(models, result)                                        \
+    typename ::boost::Requires_<                                                       \
+      (0 BOOST_PP_SEQ_FOR_EACH(BOOST_CONCEPT_REQUIRES_, ~, models)),                   \
+      void(*)result                                                                 \
+    >::type
+
+#endif 
+
+// C++0x proposed syntax changed.  This supports an older usage
+#define BOOST_CONCEPT_WHERE(models,result) BOOST_CONCEPT_REQUIRES(models,result)
+
+} // namespace boost::concept_check
+
+#endif // BOOST_CONCEPT_REQUIRES_DWA2006430_HPP
diff --git a/include/boost/concept/usage.hpp b/include/boost/concept/usage.hpp
new file mode 100644
index 0000000..e73370f
--- /dev/null
+++ b/include/boost/concept/usage.hpp
@@ -0,0 +1,36 @@
+// Copyright David Abrahams 2006. 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)
+#ifndef BOOST_CONCEPT_USAGE_DWA2006919_HPP
+# define BOOST_CONCEPT_USAGE_DWA2006919_HPP
+
+# include <boost/concept/assert.hpp>
+# include <boost/detail/workaround.hpp>
+# include <boost/concept/detail/backward_compatibility.hpp>
+
+namespace boost { namespace concepts { 
+
+template <class Model>
+struct usage_requirements
+{
+    ~usage_requirements() { ((Model*)0)->~Model(); }
+};
+
+#  if BOOST_WORKAROUND(__GNUC__, <= 3)
+
+#   define BOOST_CONCEPT_USAGE(model)                                    \
+      model(); /* at least 2.96 and 3.4.3 both need this :( */           \
+      BOOST_CONCEPT_ASSERT((boost::concepts::usage_requirements<model>)); \
+      ~model()
+
+#  else
+
+#   define BOOST_CONCEPT_USAGE(model)                                    \
+      BOOST_CONCEPT_ASSERT((boost::concepts::usage_requirements<model>)); \
+      ~model()
+
+#  endif
+
+}} // namespace boost::concepts
+
+#endif // BOOST_CONCEPT_USAGE_DWA2006919_HPP