diff -r 666f914201fb -r 2fe1408b6811 epoc32/include/stdapis/boost/function/function_template.hpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/epoc32/include/stdapis/boost/function/function_template.hpp	Tue Mar 16 16:12:26 2010 +0000
@@ -0,0 +1,837 @@
+// Boost.Function library
+
+//  Copyright Douglas Gregor 2001-2006. 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
+
+// Note: this header is a header template and must NOT have multiple-inclusion
+// protection.
+#include <boost/function/detail/prologue.hpp>
+
+#define BOOST_FUNCTION_TEMPLATE_PARMS BOOST_PP_ENUM_PARAMS(BOOST_FUNCTION_NUM_ARGS, typename T)
+
+#define BOOST_FUNCTION_TEMPLATE_ARGS BOOST_PP_ENUM_PARAMS(BOOST_FUNCTION_NUM_ARGS, T)
+
+#define BOOST_FUNCTION_PARM(J,I,D) BOOST_PP_CAT(T,I) BOOST_PP_CAT(a,I)
+
+#define BOOST_FUNCTION_PARMS BOOST_PP_ENUM(BOOST_FUNCTION_NUM_ARGS,BOOST_FUNCTION_PARM,BOOST_PP_EMPTY)
+
+#define BOOST_FUNCTION_ARGS BOOST_PP_ENUM_PARAMS(BOOST_FUNCTION_NUM_ARGS, a)
+
+#define BOOST_FUNCTION_ARG_TYPE(J,I,D) \
+  typedef BOOST_PP_CAT(T,I) BOOST_PP_CAT(BOOST_PP_CAT(arg, BOOST_PP_INC(I)),_type);
+
+#define BOOST_FUNCTION_ARG_TYPES BOOST_PP_REPEAT(BOOST_FUNCTION_NUM_ARGS,BOOST_FUNCTION_ARG_TYPE,BOOST_PP_EMPTY)
+
+// Type of the default allocator
+#ifndef BOOST_NO_STD_ALLOCATOR
+#  define BOOST_FUNCTION_DEFAULT_ALLOCATOR std::allocator<function_base>
+#else
+#  define BOOST_FUNCTION_DEFAULT_ALLOCATOR int
+#endif // BOOST_NO_STD_ALLOCATOR
+
+// Comma if nonzero number of arguments
+#if BOOST_FUNCTION_NUM_ARGS == 0
+#  define BOOST_FUNCTION_COMMA
+#else
+#  define BOOST_FUNCTION_COMMA ,
+#endif // BOOST_FUNCTION_NUM_ARGS > 0
+
+// Class names used in this version of the code
+#define BOOST_FUNCTION_FUNCTION BOOST_JOIN(function,BOOST_FUNCTION_NUM_ARGS)
+#define BOOST_FUNCTION_FUNCTION_INVOKER \
+  BOOST_JOIN(function_invoker,BOOST_FUNCTION_NUM_ARGS)
+#define BOOST_FUNCTION_VOID_FUNCTION_INVOKER \
+  BOOST_JOIN(void_function_invoker,BOOST_FUNCTION_NUM_ARGS)
+#define BOOST_FUNCTION_FUNCTION_OBJ_INVOKER \
+  BOOST_JOIN(function_obj_invoker,BOOST_FUNCTION_NUM_ARGS)
+#define BOOST_FUNCTION_VOID_FUNCTION_OBJ_INVOKER \
+  BOOST_JOIN(void_function_obj_invoker,BOOST_FUNCTION_NUM_ARGS)
+#define BOOST_FUNCTION_FUNCTION_REF_INVOKER \
+  BOOST_JOIN(function_ref_invoker,BOOST_FUNCTION_NUM_ARGS)
+#define BOOST_FUNCTION_VOID_FUNCTION_REF_INVOKER \
+  BOOST_JOIN(void_function_ref_invoker,BOOST_FUNCTION_NUM_ARGS)
+#define BOOST_FUNCTION_GET_FUNCTION_INVOKER \
+  BOOST_JOIN(get_function_invoker,BOOST_FUNCTION_NUM_ARGS)
+#define BOOST_FUNCTION_GET_FUNCTION_OBJ_INVOKER \
+  BOOST_JOIN(get_function_obj_invoker,BOOST_FUNCTION_NUM_ARGS)
+#define BOOST_FUNCTION_GET_FUNCTION_REF_INVOKER \
+  BOOST_JOIN(get_function_ref_invoker,BOOST_FUNCTION_NUM_ARGS)
+#define BOOST_FUNCTION_VTABLE BOOST_JOIN(basic_vtable,BOOST_FUNCTION_NUM_ARGS)
+
+#ifndef BOOST_NO_VOID_RETURNS
+#  define BOOST_FUNCTION_VOID_RETURN_TYPE void
+#  define BOOST_FUNCTION_RETURN(X) X
+#else
+#  define BOOST_FUNCTION_VOID_RETURN_TYPE boost::detail::function::unusable
+#  define BOOST_FUNCTION_RETURN(X) X; return BOOST_FUNCTION_VOID_RETURN_TYPE ()
+#endif
+
+#ifdef BOOST_MSVC
+#  pragma warning(push)
+#  pragma warning(disable: 4127) // conditional expression is constant.
+#endif
+
+#ifdef BOOST_MSVC
+#  pragma warning(push)
+#  pragma warning(disable: 4127) // conditional expression is constant.
+#endif
+
+namespace boost {
+  namespace detail {
+    namespace function {
+      template<
+        typename FunctionPtr,
+        typename R BOOST_FUNCTION_COMMA
+        BOOST_FUNCTION_TEMPLATE_PARMS
+        >
+      struct BOOST_FUNCTION_FUNCTION_INVOKER
+      {
+        static R invoke(function_buffer& function_ptr BOOST_FUNCTION_COMMA
+                        BOOST_FUNCTION_PARMS)
+        {
+          FunctionPtr f = reinterpret_cast<FunctionPtr>(function_ptr.func_ptr);
+          return f(BOOST_FUNCTION_ARGS);
+        }
+      };
+
+      template<
+        typename FunctionPtr,
+        typename R BOOST_FUNCTION_COMMA
+        BOOST_FUNCTION_TEMPLATE_PARMS
+        >
+      struct BOOST_FUNCTION_VOID_FUNCTION_INVOKER
+      {
+        static BOOST_FUNCTION_VOID_RETURN_TYPE
+        invoke(function_buffer& function_ptr BOOST_FUNCTION_COMMA
+               BOOST_FUNCTION_PARMS)
+
+        {
+          FunctionPtr f = reinterpret_cast<FunctionPtr>(function_ptr.func_ptr);
+          BOOST_FUNCTION_RETURN(f(BOOST_FUNCTION_ARGS));
+        }
+      };
+
+      template<
+        typename FunctionObj,
+        typename R BOOST_FUNCTION_COMMA
+        BOOST_FUNCTION_TEMPLATE_PARMS
+      >
+      struct BOOST_FUNCTION_FUNCTION_OBJ_INVOKER
+      {
+        static R invoke(function_buffer& function_obj_ptr BOOST_FUNCTION_COMMA
+                        BOOST_FUNCTION_PARMS)
+
+        {
+          FunctionObj* f;
+          if (function_allows_small_object_optimization<FunctionObj>::value)
+            f = reinterpret_cast<FunctionObj*>(&function_obj_ptr.data);
+          else
+            f = reinterpret_cast<FunctionObj*>(function_obj_ptr.obj_ptr);
+          return (*f)(BOOST_FUNCTION_ARGS);
+        }
+      };
+
+      template<
+        typename FunctionObj,
+        typename R BOOST_FUNCTION_COMMA
+        BOOST_FUNCTION_TEMPLATE_PARMS
+      >
+      struct BOOST_FUNCTION_VOID_FUNCTION_OBJ_INVOKER
+      {
+        static BOOST_FUNCTION_VOID_RETURN_TYPE
+        invoke(function_buffer& function_obj_ptr BOOST_FUNCTION_COMMA
+               BOOST_FUNCTION_PARMS)
+
+        {
+          FunctionObj* f;
+          if (function_allows_small_object_optimization<FunctionObj>::value)
+            f = reinterpret_cast<FunctionObj*>(&function_obj_ptr.data);
+          else
+            f = reinterpret_cast<FunctionObj*>(function_obj_ptr.obj_ptr);
+          BOOST_FUNCTION_RETURN((*f)(BOOST_FUNCTION_ARGS));
+        }
+      };
+
+      template<
+        typename FunctionObj,
+        typename R BOOST_FUNCTION_COMMA
+        BOOST_FUNCTION_TEMPLATE_PARMS
+      >
+      struct BOOST_FUNCTION_FUNCTION_REF_INVOKER
+      {
+        static R invoke(function_buffer& function_obj_ptr BOOST_FUNCTION_COMMA
+                        BOOST_FUNCTION_PARMS)
+
+        {
+          FunctionObj* f = 
+            reinterpret_cast<FunctionObj*>(function_obj_ptr.obj_ptr);
+          return (*f)(BOOST_FUNCTION_ARGS);
+        }
+      };
+
+      template<
+        typename FunctionObj,
+        typename R BOOST_FUNCTION_COMMA
+        BOOST_FUNCTION_TEMPLATE_PARMS
+      >
+      struct BOOST_FUNCTION_VOID_FUNCTION_REF_INVOKER
+      {
+        static BOOST_FUNCTION_VOID_RETURN_TYPE
+        invoke(function_buffer& function_obj_ptr BOOST_FUNCTION_COMMA
+               BOOST_FUNCTION_PARMS)
+
+        {
+          FunctionObj* f = 
+            reinterpret_cast<FunctionObj*>(function_obj_ptr.obj_ptr);
+          BOOST_FUNCTION_RETURN((*f)(BOOST_FUNCTION_ARGS));
+        }
+      };
+
+      template<
+        typename FunctionPtr,
+        typename R BOOST_FUNCTION_COMMA
+        BOOST_FUNCTION_TEMPLATE_PARMS
+      >
+      struct BOOST_FUNCTION_GET_FUNCTION_INVOKER
+      {
+        typedef typename mpl::if_c<(is_void<R>::value),
+                            BOOST_FUNCTION_VOID_FUNCTION_INVOKER<
+                            FunctionPtr,
+                            R BOOST_FUNCTION_COMMA
+                            BOOST_FUNCTION_TEMPLATE_ARGS
+                          >,
+                          BOOST_FUNCTION_FUNCTION_INVOKER<
+                            FunctionPtr,
+                            R BOOST_FUNCTION_COMMA
+                            BOOST_FUNCTION_TEMPLATE_ARGS
+                          >
+                       >::type type;
+      };
+
+      template<
+        typename FunctionObj,
+        typename R BOOST_FUNCTION_COMMA
+        BOOST_FUNCTION_TEMPLATE_PARMS
+       >
+      struct BOOST_FUNCTION_GET_FUNCTION_OBJ_INVOKER
+      {
+        typedef typename mpl::if_c<(is_void<R>::value),
+                            BOOST_FUNCTION_VOID_FUNCTION_OBJ_INVOKER<
+                            FunctionObj,
+                            R BOOST_FUNCTION_COMMA
+                            BOOST_FUNCTION_TEMPLATE_ARGS
+                          >,
+                          BOOST_FUNCTION_FUNCTION_OBJ_INVOKER<
+                            FunctionObj,
+                            R BOOST_FUNCTION_COMMA
+                            BOOST_FUNCTION_TEMPLATE_ARGS
+                          >
+                       >::type type;
+      };
+
+      template<
+        typename FunctionObj,
+        typename R BOOST_FUNCTION_COMMA
+        BOOST_FUNCTION_TEMPLATE_PARMS
+       >
+      struct BOOST_FUNCTION_GET_FUNCTION_REF_INVOKER
+      {
+        typedef typename mpl::if_c<(is_void<R>::value),
+                            BOOST_FUNCTION_VOID_FUNCTION_REF_INVOKER<
+                            FunctionObj,
+                            R BOOST_FUNCTION_COMMA
+                            BOOST_FUNCTION_TEMPLATE_ARGS
+                          >,
+                          BOOST_FUNCTION_FUNCTION_REF_INVOKER<
+                            FunctionObj,
+                            R BOOST_FUNCTION_COMMA
+                            BOOST_FUNCTION_TEMPLATE_ARGS
+                          >
+                       >::type type;
+      };
+
+      /**
+       * vtable for a specific boost::function instance.
+       */
+      template<typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS,
+               typename Allocator>
+      struct BOOST_FUNCTION_VTABLE : vtable_base
+      {
+#ifndef BOOST_NO_VOID_RETURNS
+        typedef R         result_type;
+#else
+        typedef typename function_return_type<R>::type result_type;
+#endif // BOOST_NO_VOID_RETURNS
+
+        typedef result_type (*invoker_type)(function_buffer&
+                                            BOOST_FUNCTION_COMMA
+                                            BOOST_FUNCTION_TEMPLATE_ARGS);
+
+        template<typename F>
+        BOOST_FUNCTION_VTABLE(F f) : vtable_base(), invoker(0)
+        {
+          init(f);
+        }
+
+        template<typename F>
+        bool assign_to(F f, function_buffer& functor)
+        {
+          typedef typename get_function_tag<F>::type tag;
+          return assign_to(f, functor, tag());
+        }
+
+        void clear(function_buffer& functor)
+        {
+          if (manager)
+            manager(functor, functor, destroy_functor_tag);
+        }
+
+      private:
+        template<typename F>
+        void init(F f)
+        {
+          typedef typename get_function_tag<F>::type tag;
+          init(f, tag());
+        }
+
+        // Function pointers
+        template<typename FunctionPtr>
+        void init(FunctionPtr /*f*/, function_ptr_tag)
+        {
+          typedef typename BOOST_FUNCTION_GET_FUNCTION_INVOKER<
+                             FunctionPtr,
+                             R BOOST_FUNCTION_COMMA
+                             BOOST_FUNCTION_TEMPLATE_ARGS
+                           >::type
+            actual_invoker_type;
+
+          invoker = &actual_invoker_type::invoke;
+          manager = &functor_manager<FunctionPtr, Allocator>::manage;
+        }
+
+        template<typename FunctionPtr>
+        bool 
+        assign_to(FunctionPtr f, function_buffer& functor, function_ptr_tag)
+        {
+          this->clear(functor);
+          if (f) {
+            // should be a reinterpret cast, but some compilers insist
+            // on giving cv-qualifiers to free functions
+            functor.func_ptr = (void (*)())(f);
+            return true;
+          } else {
+            return false;
+          }
+        }
+
+        // Member pointers
+#if BOOST_FUNCTION_NUM_ARGS > 0
+        template<typename MemberPtr>
+        void init(MemberPtr f, member_ptr_tag)
+        {
+          // DPG TBD: Add explicit support for member function
+          // objects, so we invoke through mem_fn() but we retain the
+          // right target_type() values.
+          this->init(mem_fn(f));
+        }
+
+        template<typename MemberPtr>
+        bool assign_to(MemberPtr f, function_buffer& functor, member_ptr_tag)
+        {
+          // DPG TBD: Add explicit support for member function
+          // objects, so we invoke through mem_fn() but we retain the
+          // right target_type() values.
+          if (f) {
+            this->assign_to(mem_fn(f), functor);
+            return true;
+          } else {
+            return false;
+          }
+        }
+#endif // BOOST_FUNCTION_NUM_ARGS > 0
+
+        // Function objects
+        template<typename FunctionObj>
+        void init(FunctionObj /*f*/, function_obj_tag)
+        {
+          typedef typename BOOST_FUNCTION_GET_FUNCTION_OBJ_INVOKER<
+                             FunctionObj,
+                             R BOOST_FUNCTION_COMMA
+                             BOOST_FUNCTION_TEMPLATE_ARGS
+                           >::type
+            actual_invoker_type;
+
+          invoker = &actual_invoker_type::invoke;
+          manager = &functor_manager<FunctionObj, Allocator>::manage;
+        }
+
+        // Assign to a function object using the small object optimization
+        template<typename FunctionObj>
+        void 
+        assign_functor(FunctionObj f, function_buffer& functor, mpl::true_)
+        {
+          new ((void*)&functor.data) FunctionObj(f);
+        }
+
+        // Assign to a function object allocated on the heap.
+        template<typename FunctionObj>
+        void 
+        assign_functor(FunctionObj f, function_buffer& functor, mpl::false_)
+        {
+#ifndef BOOST_NO_STD_ALLOCATOR
+          typedef typename Allocator::template rebind<FunctionObj>::other
+            allocator_type;
+          typedef typename allocator_type::pointer pointer_type;
+
+          allocator_type allocator;
+          pointer_type copy = allocator.allocate(1);
+          allocator.construct(copy, f);
+
+          // Get back to the original pointer type
+          functor.obj_ptr = static_cast<FunctionObj*>(copy);
+#  else
+          functor.obj_ptr = new FunctionObj(f);
+#  endif // BOOST_NO_STD_ALLOCATOR
+        }
+
+        template<typename FunctionObj>
+        bool 
+        assign_to(FunctionObj f, function_buffer& functor, function_obj_tag)
+        {
+          if (!boost::detail::function::has_empty_target(boost::addressof(f))) {
+            assign_functor(f, functor, 
+                           mpl::bool_<(function_allows_small_object_optimization<FunctionObj>::value)>());
+            return true;
+          } else {
+            return false;
+          }
+        }
+
+        // Reference to a function object
+        template<typename FunctionObj>
+        void 
+        init(const reference_wrapper<FunctionObj>& /*f*/, function_obj_ref_tag)
+        {
+          typedef typename BOOST_FUNCTION_GET_FUNCTION_REF_INVOKER<
+                             FunctionObj,
+                             R BOOST_FUNCTION_COMMA
+                             BOOST_FUNCTION_TEMPLATE_ARGS
+                           >::type
+            actual_invoker_type;
+
+          invoker = &actual_invoker_type::invoke;
+          manager = &reference_manager<FunctionObj>::get;
+        }
+
+        template<typename FunctionObj>
+        bool 
+        assign_to(const reference_wrapper<FunctionObj>& f, 
+                  function_buffer& functor, function_obj_ref_tag)
+        {
+          if (!boost::detail::function::has_empty_target(f.get_pointer())) {
+            // DPG TBD: We might need to detect constness of
+            // FunctionObj to assign into obj_ptr or const_obj_ptr to
+            // be truly legit, but no platform in existence makes
+            // const void* different from void*.
+            functor.const_obj_ptr = f.get_pointer();
+            return true;
+          } else {
+            return false;
+          }
+        }
+
+      public:
+        invoker_type invoker;
+      };
+    } // end namespace function
+  } // end namespace detail
+
+  template<
+    typename R BOOST_FUNCTION_COMMA
+    BOOST_FUNCTION_TEMPLATE_PARMS,
+    typename Allocator = BOOST_FUNCTION_DEFAULT_ALLOCATOR
+  >
+  class BOOST_FUNCTION_FUNCTION : public function_base
+  {
+  public:
+#ifndef BOOST_NO_VOID_RETURNS
+    typedef R         result_type;
+#else
+    typedef  typename boost::detail::function::function_return_type<R>::type
+      result_type;
+#endif // BOOST_NO_VOID_RETURNS
+
+  private:
+    typedef boost::detail::function::BOOST_FUNCTION_VTABLE<
+              R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_ARGS, Allocator>
+      vtable_type;
+
+    struct clear_type {};
+
+  public:
+    BOOST_STATIC_CONSTANT(int, args = BOOST_FUNCTION_NUM_ARGS);
+
+    // add signature for boost::lambda
+    template<typename Args>
+    struct sig
+    {
+      typedef result_type type;
+    };
+
+#if BOOST_FUNCTION_NUM_ARGS == 1
+    typedef T0 argument_type;
+#elif BOOST_FUNCTION_NUM_ARGS == 2
+    typedef T0 first_argument_type;
+    typedef T1 second_argument_type;
+#endif
+
+    BOOST_STATIC_CONSTANT(int, arity = BOOST_FUNCTION_NUM_ARGS);
+    BOOST_FUNCTION_ARG_TYPES
+
+    typedef Allocator allocator_type;
+    typedef BOOST_FUNCTION_FUNCTION self_type;
+
+    BOOST_FUNCTION_FUNCTION() : function_base() { }
+
+    // MSVC chokes if the following two constructors are collapsed into
+    // one with a default parameter.
+    template<typename Functor>
+    BOOST_FUNCTION_FUNCTION(Functor BOOST_FUNCTION_TARGET_FIX(const &) f
+#ifndef BOOST_NO_SFINAE
+                            ,typename enable_if_c<
+                            (boost::type_traits::ice_not<
+                             (is_integral<Functor>::value)>::value),
+                                        int>::type = 0
+#endif // BOOST_NO_SFINAE
+                            ) :
+      function_base()
+    {
+      this->assign_to(f);
+    }
+
+#ifndef BOOST_NO_SFINAE
+    BOOST_FUNCTION_FUNCTION(clear_type*) : function_base() { }
+#else
+    BOOST_FUNCTION_FUNCTION(int zero) : function_base()
+    {
+      BOOST_ASSERT(zero == 0);
+    }
+#endif
+
+    BOOST_FUNCTION_FUNCTION(const BOOST_FUNCTION_FUNCTION& f) : function_base()
+    {
+      this->assign_to_own(f);
+    }
+
+    ~BOOST_FUNCTION_FUNCTION() { clear(); }
+
+#if BOOST_WORKAROUND(BOOST_MSVC, < 1300)
+    // MSVC 6.0 and prior require all definitions to be inline, but
+    // these definitions can become very costly.
+    result_type operator()(BOOST_FUNCTION_PARMS) const
+    {
+      if (this->empty())
+        boost::throw_exception(bad_function_call());
+
+      return static_cast<vtable_type*>(vtable)->invoker
+               (this->functor BOOST_FUNCTION_COMMA BOOST_FUNCTION_ARGS);
+    }
+#else
+    result_type operator()(BOOST_FUNCTION_PARMS) const;
+#endif
+
+    // The distinction between when to use BOOST_FUNCTION_FUNCTION and
+    // when to use self_type is obnoxious. MSVC cannot handle self_type as
+    // the return type of these assignment operators, but Borland C++ cannot
+    // handle BOOST_FUNCTION_FUNCTION as the type of the temporary to
+    // construct.
+    template<typename Functor>
+#ifndef BOOST_NO_SFINAE
+    typename enable_if_c<
+               (boost::type_traits::ice_not<
+                 (is_integral<Functor>::value)>::value),
+               BOOST_FUNCTION_FUNCTION&>::type
+#else
+    BOOST_FUNCTION_FUNCTION&
+#endif
+    operator=(Functor BOOST_FUNCTION_TARGET_FIX(const &) f)
+    {
+      this->clear();
+      try {
+        this->assign_to(f);
+      } catch (...) {
+        vtable = 0;
+        throw;
+      }
+      return *this;
+    }
+
+#ifndef BOOST_NO_SFINAE
+    BOOST_FUNCTION_FUNCTION& operator=(clear_type*)
+    {
+      this->clear();
+      return *this;
+    }
+#else
+    BOOST_FUNCTION_FUNCTION& operator=(int zero)
+    {
+      BOOST_ASSERT(zero == 0);
+      this->clear();
+      return *this;
+    }
+#endif
+
+    // Assignment from another BOOST_FUNCTION_FUNCTION
+    BOOST_FUNCTION_FUNCTION& operator=(const BOOST_FUNCTION_FUNCTION& f)
+    {
+      if (&f == this)
+        return *this;
+
+      this->clear();
+      try {
+        this->assign_to_own(f);
+      } catch (...) {
+        vtable = 0;
+        throw;
+      }
+      return *this;
+    }
+
+    void swap(BOOST_FUNCTION_FUNCTION& other)
+    {
+      if (&other == this)
+        return;
+
+      BOOST_FUNCTION_FUNCTION tmp = *this;
+      *this = other;
+      other = tmp;
+    }
+
+    // Clear out a target, if there is one
+    void clear()
+    {
+      if (vtable) {
+        static_cast<vtable_type*>(vtable)->clear(this->functor);
+        vtable = 0;
+      }
+    }
+
+#if (defined __SUNPRO_CC) && (__SUNPRO_CC <= 0x530) && !(defined BOOST_NO_COMPILER_CONFIG)
+    // Sun C++ 5.3 can't handle the safe_bool idiom, so don't use it
+    operator bool () const { return !this->empty(); }
+#else
+  private:
+    struct dummy {
+      void nonnull() {};
+    };
+
+    typedef void (dummy::*safe_bool)();
+
+  public:
+    operator safe_bool () const
+      { return (this->empty())? 0 : &dummy::nonnull; }
+
+    bool operator!() const
+      { return this->empty(); }
+#endif
+
+  private:
+    void assign_to_own(const BOOST_FUNCTION_FUNCTION& f)
+    {
+      if (!f.empty()) {
+        this->vtable = f.vtable;
+        f.vtable->manager(f.functor, this->functor,
+                          boost::detail::function::clone_functor_tag);
+      }
+    }
+
+    template<typename Functor>
+    void assign_to(Functor f)
+    {
+      static vtable_type stored_vtable(f);
+      if (stored_vtable.assign_to(f, functor)) vtable = &stored_vtable;
+      else vtable = 0;
+    }
+  };
+
+  template<typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS ,
+           typename Allocator>
+  inline void swap(BOOST_FUNCTION_FUNCTION<
+                     R BOOST_FUNCTION_COMMA
+                     BOOST_FUNCTION_TEMPLATE_ARGS ,
+                     Allocator
+                   >& f1,
+                   BOOST_FUNCTION_FUNCTION<
+                     R BOOST_FUNCTION_COMMA
+                     BOOST_FUNCTION_TEMPLATE_ARGS,
+                     Allocator
+                   >& f2)
+  {
+    f1.swap(f2);
+  }
+
+#if !BOOST_WORKAROUND(BOOST_MSVC, < 1300)
+  template<typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS,
+           typename Allocator>
+  typename BOOST_FUNCTION_FUNCTION<
+      R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_ARGS,
+      Allocator>::result_type
+   BOOST_FUNCTION_FUNCTION<R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_ARGS,
+
+                           Allocator>
+  ::operator()(BOOST_FUNCTION_PARMS) const
+  {
+    if (this->empty())
+      boost::throw_exception(bad_function_call());
+
+    return static_cast<vtable_type*>(vtable)->invoker
+             (this->functor BOOST_FUNCTION_COMMA BOOST_FUNCTION_ARGS);
+  }
+#endif
+
+// Poison comparisons between boost::function objects of the same type.
+template<typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS ,
+         typename Allocator>
+  void operator==(const BOOST_FUNCTION_FUNCTION<
+                          R BOOST_FUNCTION_COMMA
+                          BOOST_FUNCTION_TEMPLATE_ARGS ,
+                          Allocator>&,
+                  const BOOST_FUNCTION_FUNCTION<
+                          R BOOST_FUNCTION_COMMA
+                          BOOST_FUNCTION_TEMPLATE_ARGS ,
+                  Allocator>&);
+template<typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS ,
+         typename Allocator>
+  void operator!=(const BOOST_FUNCTION_FUNCTION<
+                          R BOOST_FUNCTION_COMMA
+                          BOOST_FUNCTION_TEMPLATE_ARGS ,
+                          Allocator>&,
+                  const BOOST_FUNCTION_FUNCTION<
+                          R BOOST_FUNCTION_COMMA
+                          BOOST_FUNCTION_TEMPLATE_ARGS ,
+                  Allocator>&);
+
+#if !defined(BOOST_FUNCTION_NO_FUNCTION_TYPE_SYNTAX)
+
+#if BOOST_FUNCTION_NUM_ARGS == 0
+#define BOOST_FUNCTION_PARTIAL_SPEC R (void)
+#else
+#define BOOST_FUNCTION_PARTIAL_SPEC R (BOOST_PP_ENUM_PARAMS(BOOST_FUNCTION_NUM_ARGS,T))
+#endif
+
+template<typename R BOOST_FUNCTION_COMMA
+         BOOST_FUNCTION_TEMPLATE_PARMS,
+         typename Allocator>
+class function<BOOST_FUNCTION_PARTIAL_SPEC, Allocator>
+  : public BOOST_FUNCTION_FUNCTION<R, BOOST_FUNCTION_TEMPLATE_ARGS
+                                   BOOST_FUNCTION_COMMA Allocator>
+{
+  typedef BOOST_FUNCTION_FUNCTION<R, BOOST_FUNCTION_TEMPLATE_ARGS
+                                  BOOST_FUNCTION_COMMA Allocator> base_type;
+  typedef function self_type;
+
+  struct clear_type {};
+
+public:
+  typedef typename base_type::allocator_type allocator_type;
+
+  function() : base_type() {}
+
+  template<typename Functor>
+  function(Functor f
+#ifndef BOOST_NO_SFINAE
+           ,typename enable_if_c<
+                            (boost::type_traits::ice_not<
+                          (is_integral<Functor>::value)>::value),
+                       int>::type = 0
+#endif
+           ) :
+    base_type(f)
+  {
+  }
+
+#ifndef BOOST_NO_SFINAE
+  function(clear_type*) : base_type() {}
+#endif
+
+  function(const self_type& f) : base_type(static_cast<const base_type&>(f)){}
+
+  function(const base_type& f) : base_type(static_cast<const base_type&>(f)){}
+
+  self_type& operator=(const self_type& f)
+  {
+    self_type(f).swap(*this);
+    return *this;
+  }
+
+  template<typename Functor>
+#ifndef BOOST_NO_SFINAE
+  typename enable_if_c<
+                            (boost::type_traits::ice_not<
+                         (is_integral<Functor>::value)>::value),
+                      self_type&>::type
+#else
+  self_type&
+#endif
+  operator=(Functor f)
+  {
+    self_type(f).swap(*this);
+    return *this;
+  }
+
+#ifndef BOOST_NO_SFINAE
+  self_type& operator=(clear_type*)
+  {
+    this->clear();
+    return *this;
+  }
+#endif
+
+  self_type& operator=(const base_type& f)
+  {
+    self_type(f).swap(*this);
+    return *this;
+  }
+};
+
+#ifdef BOOST_MSVC
+# pragma warning(pop)
+#endif
+
+#undef BOOST_FUNCTION_PARTIAL_SPEC
+#endif // have partial specialization
+
+} // end namespace boost
+
+#ifdef BOOST_MSVC
+# pragma warning(pop)
+#endif
+
+// Cleanup after ourselves...
+#undef BOOST_FUNCTION_VTABLE
+#undef BOOST_FUNCTION_DEFAULT_ALLOCATOR
+#undef BOOST_FUNCTION_COMMA
+#undef BOOST_FUNCTION_FUNCTION
+#undef BOOST_FUNCTION_FUNCTION_INVOKER
+#undef BOOST_FUNCTION_VOID_FUNCTION_INVOKER
+#undef BOOST_FUNCTION_FUNCTION_OBJ_INVOKER
+#undef BOOST_FUNCTION_VOID_FUNCTION_OBJ_INVOKER
+#undef BOOST_FUNCTION_FUNCTION_REF_INVOKER
+#undef BOOST_FUNCTION_VOID_FUNCTION_REF_INVOKER
+#undef BOOST_FUNCTION_GET_FUNCTION_INVOKER
+#undef BOOST_FUNCTION_GET_FUNCTION_OBJ_INVOKER
+#undef BOOST_FUNCTION_GET_FUNCTION_REF_INVOKER
+#undef BOOST_FUNCTION_GET_MEM_FUNCTION_INVOKER
+#undef BOOST_FUNCTION_TEMPLATE_PARMS
+#undef BOOST_FUNCTION_TEMPLATE_ARGS
+#undef BOOST_FUNCTION_PARMS
+#undef BOOST_FUNCTION_PARM
+#undef BOOST_FUNCTION_ARGS
+#undef BOOST_FUNCTION_ARG_TYPE
+#undef BOOST_FUNCTION_ARG_TYPES
+#undef BOOST_FUNCTION_VOID_RETURN_TYPE
+#undef BOOST_FUNCTION_RETURN