整理

include/boost/function/function0.hpp

@@ -0,0 +1,10 @@
+// Boost.Function library
+
+//  Copyright Douglas Gregor 2002-2003. 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
+
+#include <boost/function/function_template.hpp>

include/boost/function/function1.hpp

@@ -0,0 +1,10 @@
+// Boost.Function library
+
+//  Copyright Douglas Gregor 2002-2003. 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
+
+#include <boost/function/function_template.hpp>

include/boost/function/function10.hpp

@@ -0,0 +1,10 @@
+// Boost.Function library
+
+//  Copyright Douglas Gregor 2002-2003. 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
+
+#include <boost/function/function_template.hpp>

include/boost/function/function2.hpp

@@ -0,0 +1,10 @@
+// Boost.Function library
+
+//  Copyright Douglas Gregor 2002-2003. 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
+
+#include <boost/function/function_template.hpp>

include/boost/function/function3.hpp

@@ -0,0 +1,10 @@
+// Boost.Function library
+
+//  Copyright Douglas Gregor 2002-2003. 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
+
+#include <boost/function/function_template.hpp>

include/boost/function/function4.hpp

@@ -0,0 +1,10 @@
+// Boost.Function library
+
+//  Copyright Douglas Gregor 2002-2003. 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
+
+#include <boost/function/function_template.hpp>

include/boost/function/function5.hpp

@@ -0,0 +1,10 @@
+// Boost.Function library
+
+//  Copyright Douglas Gregor 2002-2003. 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
+
+#include <boost/function/function_template.hpp>

include/boost/function/function6.hpp

@@ -0,0 +1,10 @@
+// Boost.Function library
+
+//  Copyright Douglas Gregor 2002-2003. 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
+
+#include <boost/function/function_template.hpp>

include/boost/function/function7.hpp

@@ -0,0 +1,10 @@
+// Boost.Function library
+
+//  Copyright Douglas Gregor 2002-2003. 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
+
+#include <boost/function/function_template.hpp>

include/boost/function/function8.hpp

@@ -0,0 +1,10 @@
+// Boost.Function library
+
+//  Copyright Douglas Gregor 2002-2003. 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
+
+#include <boost/function/function_template.hpp>

include/boost/function/function9.hpp

@@ -0,0 +1,10 @@
+// Boost.Function library
+
+//  Copyright Douglas Gregor 2002-2003. 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
+
+#include <boost/function/function_template.hpp>

include/boost/function/function_base.hpp

@@ -0,0 +1,726 @@
+// Boost.Function library
+
+//  Copyright Douglas Gregor 2001-2006
+//  Copyright Emil Dotchevski 2007
+//  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
+
+#ifndef BOOST_FUNCTION_BASE_HEADER
+#define BOOST_FUNCTION_BASE_HEADER
+
+#include <boost/function/function_fwd.hpp>
+#include <boost/function_equal.hpp>
+#include <boost/core/typeinfo.hpp>
+#include <boost/core/ref.hpp>
+#include <boost/assert.hpp>
+#include <boost/config.hpp>
+#include <boost/config/workaround.hpp>
+#include <stdexcept>
+#include <string>
+#include <memory>
+#include <new>
+#include <type_traits>
+
+#if defined(BOOST_MSVC)
+#   pragma warning( push )
+#   pragma warning( disable : 4793 ) // complaint about native code generation
+#   pragma warning( disable : 4127 ) // "conditional expression is constant"
+#endif
+
+// retained because used in a test
+#define BOOST_FUNCTION_TARGET_FIX(x)
+
+#define BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor,Type) \
+  typename std::enable_if< !std::is_integral<Functor>::value, Type>::type
+
+namespace boost {
+  namespace detail {
+    namespace function {
+      class X;
+
+      /**
+       * A buffer used to store small function objects in
+       * boost::function. It is a union containing function pointers,
+       * object pointers, and a structure that resembles a bound
+       * member function pointer.
+       */
+      union function_buffer_members
+      {
+        // For pointers to function objects
+        typedef void* obj_ptr_t;
+        mutable obj_ptr_t obj_ptr;
+
+        // For pointers to std::type_info objects
+        struct type_t {
+          // (get_functor_type_tag, check_functor_type_tag).
+          const boost::core::typeinfo* type;
+
+          // Whether the type is const-qualified.
+          bool const_qualified;
+          // Whether the type is volatile-qualified.
+          bool volatile_qualified;
+        } type;
+
+        // For function pointers of all kinds
+        typedef void (*func_ptr_t)();
+        mutable func_ptr_t func_ptr;
+
+#if defined(BOOST_MSVC) && BOOST_MSVC >= 1929
+# pragma warning(push)
+# pragma warning(disable: 5243)
+#endif
+
+        // For bound member pointers
+        struct bound_memfunc_ptr_t {
+          void (X::*memfunc_ptr)(int);
+          void* obj_ptr;
+        } bound_memfunc_ptr;
+
+#if defined(BOOST_MSVC) && BOOST_MSVC >= 1929
+# pragma warning(pop)
+#endif
+
+        // For references to function objects. We explicitly keep
+        // track of the cv-qualifiers on the object referenced.
+        struct obj_ref_t {
+          mutable void* obj_ptr;
+          bool is_const_qualified;
+          bool is_volatile_qualified;
+        } obj_ref;
+      };
+
+      union BOOST_SYMBOL_VISIBLE function_buffer
+      {
+        // Type-specific union members
+        mutable function_buffer_members members;
+
+        // To relax aliasing constraints
+        mutable char data[sizeof(function_buffer_members)];
+      };
+
+      // The operation type to perform on the given functor/function pointer
+      enum functor_manager_operation_type {
+        clone_functor_tag,
+        move_functor_tag,
+        destroy_functor_tag,
+        check_functor_type_tag,
+        get_functor_type_tag
+      };
+
+      // Tags used to decide between different types of functions
+      struct function_ptr_tag {};
+      struct function_obj_tag {};
+      struct member_ptr_tag {};
+      struct function_obj_ref_tag {};
+
+      template<typename F>
+      class get_function_tag
+      {
+        typedef typename std::conditional<std::is_pointer<F>::value,
+                                   function_ptr_tag,
+                                   function_obj_tag>::type ptr_or_obj_tag;
+
+        typedef typename std::conditional<std::is_member_pointer<F>::value,
+                                   member_ptr_tag,
+                                   ptr_or_obj_tag>::type ptr_or_obj_or_mem_tag;
+
+        typedef typename std::conditional<is_reference_wrapper<F>::value,
+                                   function_obj_ref_tag,
+                                   ptr_or_obj_or_mem_tag>::type or_ref_tag;
+
+      public:
+        typedef or_ref_tag type;
+      };
+
+      // The trivial manager does nothing but return the same pointer (if we
+      // are cloning) or return the null pointer (if we are deleting).
+      template<typename F>
+      struct reference_manager
+      {
+        static inline void
+        manage(const function_buffer& in_buffer, function_buffer& out_buffer,
+               functor_manager_operation_type op)
+        {
+          switch (op) {
+          case clone_functor_tag:
+            out_buffer.members.obj_ref = in_buffer.members.obj_ref;
+            return;
+
+          case move_functor_tag:
+            out_buffer.members.obj_ref = in_buffer.members.obj_ref;
+            in_buffer.members.obj_ref.obj_ptr = 0;
+            return;
+
+          case destroy_functor_tag:
+            out_buffer.members.obj_ref.obj_ptr = 0;
+            return;
+
+          case check_functor_type_tag:
+            {
+              // Check whether we have the same type. We can add
+              // cv-qualifiers, but we can't take them away.
+              if (*out_buffer.members.type.type == BOOST_CORE_TYPEID(F)
+                  && (!in_buffer.members.obj_ref.is_const_qualified
+                      || out_buffer.members.type.const_qualified)
+                  && (!in_buffer.members.obj_ref.is_volatile_qualified
+                      || out_buffer.members.type.volatile_qualified))
+                out_buffer.members.obj_ptr = in_buffer.members.obj_ref.obj_ptr;
+              else
+                out_buffer.members.obj_ptr = 0;
+            }
+            return;
+
+          case get_functor_type_tag:
+            out_buffer.members.type.type = &BOOST_CORE_TYPEID(F);
+            out_buffer.members.type.const_qualified = in_buffer.members.obj_ref.is_const_qualified;
+            out_buffer.members.type.volatile_qualified = in_buffer.members.obj_ref.is_volatile_qualified;
+            return;
+          }
+        }
+      };
+
+      /**
+       * Determine if boost::function can use the small-object
+       * optimization with the function object type F.
+       */
+      template<typename F>
+      struct function_allows_small_object_optimization
+      {
+        BOOST_STATIC_CONSTANT
+          (bool,
+           value = ((sizeof(F) <= sizeof(function_buffer) &&
+                     (std::alignment_of<function_buffer>::value
+                      % std::alignment_of<F>::value == 0))));
+      };
+
+      template <typename F,typename A>
+      struct functor_wrapper: public F, public A
+      {
+        functor_wrapper( F f, A a ):
+          F(f),
+          A(a)
+        {
+        }
+
+        functor_wrapper(const functor_wrapper& f) :
+          F(static_cast<const F&>(f)),
+          A(static_cast<const A&>(f))
+        {
+        }
+      };
+
+      /**
+       * The functor_manager class contains a static function "manage" which
+       * can clone or destroy the given function/function object pointer.
+       */
+      template<typename Functor>
+      struct functor_manager_common
+      {
+        typedef Functor functor_type;
+
+        // Function pointers
+        static inline void
+        manage_ptr(const function_buffer& in_buffer, function_buffer& out_buffer,
+                functor_manager_operation_type op)
+        {
+          if (op == clone_functor_tag)
+            out_buffer.members.func_ptr = in_buffer.members.func_ptr;
+          else if (op == move_functor_tag) {
+            out_buffer.members.func_ptr = in_buffer.members.func_ptr;
+            in_buffer.members.func_ptr = 0;
+          } else if (op == destroy_functor_tag)
+            out_buffer.members.func_ptr = 0;
+          else if (op == check_functor_type_tag) {
+            if (*out_buffer.members.type.type == BOOST_CORE_TYPEID(Functor))
+              out_buffer.members.obj_ptr = &in_buffer.members.func_ptr;
+            else
+              out_buffer.members.obj_ptr = 0;
+          } else /* op == get_functor_type_tag */ {
+            out_buffer.members.type.type = &BOOST_CORE_TYPEID(Functor);
+            out_buffer.members.type.const_qualified = false;
+            out_buffer.members.type.volatile_qualified = false;
+          }
+        }
+
+        // Function objects that fit in the small-object buffer.
+        static inline void
+        manage_small(const function_buffer& in_buffer, function_buffer& out_buffer,
+                functor_manager_operation_type op)
+        {
+          if (op == clone_functor_tag) {
+            const functor_type* in_functor =
+              reinterpret_cast<const functor_type*>(in_buffer.data);
+            new (reinterpret_cast<void*>(out_buffer.data)) functor_type(*in_functor);
+
+          } else if (op == move_functor_tag) {
+              functor_type* f = reinterpret_cast<functor_type*>(in_buffer.data);
+              new (reinterpret_cast<void*>(out_buffer.data)) functor_type(std::move(*f));
+              f->~Functor();
+          } else if (op == destroy_functor_tag) {
+            // Some compilers (Borland, vc6, ...) are unhappy with ~functor_type.
+             functor_type* f = reinterpret_cast<functor_type*>(out_buffer.data);
+             (void)f; // suppress warning about the value of f not being used (MSVC)
+             f->~Functor();
+          } else if (op == check_functor_type_tag) {
+             if (*out_buffer.members.type.type == BOOST_CORE_TYPEID(Functor))
+              out_buffer.members.obj_ptr = in_buffer.data;
+            else
+              out_buffer.members.obj_ptr = 0;
+          } else /* op == get_functor_type_tag */ {
+            out_buffer.members.type.type = &BOOST_CORE_TYPEID(Functor);
+            out_buffer.members.type.const_qualified = false;
+            out_buffer.members.type.volatile_qualified = false;
+          }
+        }
+      };
+
+      template<typename Functor>
+      struct functor_manager
+      {
+      private:
+        typedef Functor functor_type;
+
+        // Function pointers
+        static inline void
+        manager(const function_buffer& in_buffer, function_buffer& out_buffer,
+                functor_manager_operation_type op, function_ptr_tag)
+        {
+          functor_manager_common<Functor>::manage_ptr(in_buffer,out_buffer,op);
+        }
+
+        // Function objects that fit in the small-object buffer.
+        static inline void
+        manager(const function_buffer& in_buffer, function_buffer& out_buffer,
+                functor_manager_operation_type op, std::true_type)
+        {
+          functor_manager_common<Functor>::manage_small(in_buffer,out_buffer,op);
+        }
+
+        // Function objects that require heap allocation
+        static inline void
+        manager(const function_buffer& in_buffer, function_buffer& out_buffer,
+                functor_manager_operation_type op, std::false_type)
+        {
+          if (op == clone_functor_tag) {
+            // Clone the functor
+            // GCC 2.95.3 gets the CV qualifiers wrong here, so we
+            // can't do the static_cast that we should do.
+            // jewillco: Changing this to static_cast because GCC 2.95.3 is
+            // obsolete.
+            const functor_type* f =
+              static_cast<const functor_type*>(in_buffer.members.obj_ptr);
+            functor_type* new_f = new functor_type(*f);
+            out_buffer.members.obj_ptr = new_f;
+          } else if (op == move_functor_tag) {
+            out_buffer.members.obj_ptr = in_buffer.members.obj_ptr;
+            in_buffer.members.obj_ptr = 0;
+          } else if (op == destroy_functor_tag) {
+            /* Cast from the void pointer to the functor pointer type */
+            functor_type* f =
+              static_cast<functor_type*>(out_buffer.members.obj_ptr);
+            delete f;
+            out_buffer.members.obj_ptr = 0;
+          } else if (op == check_functor_type_tag) {
+            if (*out_buffer.members.type.type == BOOST_CORE_TYPEID(Functor))
+              out_buffer.members.obj_ptr = in_buffer.members.obj_ptr;
+            else
+              out_buffer.members.obj_ptr = 0;
+          } else /* op == get_functor_type_tag */ {
+            out_buffer.members.type.type = &BOOST_CORE_TYPEID(Functor);
+            out_buffer.members.type.const_qualified = false;
+            out_buffer.members.type.volatile_qualified = false;
+          }
+        }
+
+        // For function objects, we determine whether the function
+        // object can use the small-object optimization buffer or
+        // whether we need to allocate it on the heap.
+        static inline void
+        manager(const function_buffer& in_buffer, function_buffer& out_buffer,
+                functor_manager_operation_type op, function_obj_tag)
+        {
+          manager(in_buffer, out_buffer, op,
+                  std::integral_constant<bool, (function_allows_small_object_optimization<functor_type>::value)>());
+        }
+
+        // For member pointers, we use the small-object optimization buffer.
+        static inline void
+        manager(const function_buffer& in_buffer, function_buffer& out_buffer,
+                functor_manager_operation_type op, member_ptr_tag)
+        {
+          manager(in_buffer, out_buffer, op, std::true_type());
+        }
+
+      public:
+        /* Dispatch to an appropriate manager based on whether we have a
+           function pointer or a function object pointer. */
+        static inline void
+        manage(const function_buffer& in_buffer, function_buffer& out_buffer,
+               functor_manager_operation_type op)
+        {
+          typedef typename get_function_tag<functor_type>::type tag_type;
+          if (op == get_functor_type_tag) {
+            out_buffer.members.type.type = &BOOST_CORE_TYPEID(functor_type);
+            out_buffer.members.type.const_qualified = false;
+            out_buffer.members.type.volatile_qualified = false;
+          } else {
+            manager(in_buffer, out_buffer, op, tag_type());
+          }
+        }
+      };
+
+      template<typename Functor, typename Allocator>
+      struct functor_manager_a
+      {
+      private:
+        typedef Functor functor_type;
+
+        // Function pointers
+        static inline void
+        manager(const function_buffer& in_buffer, function_buffer& out_buffer,
+                functor_manager_operation_type op, function_ptr_tag)
+        {
+          functor_manager_common<Functor>::manage_ptr(in_buffer,out_buffer,op);
+        }
+
+        // Function objects that fit in the small-object buffer.
+        static inline void
+        manager(const function_buffer& in_buffer, function_buffer& out_buffer,
+                functor_manager_operation_type op, std::true_type)
+        {
+          functor_manager_common<Functor>::manage_small(in_buffer,out_buffer,op);
+        }
+
+        // Function objects that require heap allocation
+        static inline void
+        manager(const function_buffer& in_buffer, function_buffer& out_buffer,
+                functor_manager_operation_type op, std::false_type)
+        {
+          typedef functor_wrapper<Functor,Allocator> functor_wrapper_type;
+
+          using wrapper_allocator_type = typename std::allocator_traits<Allocator>::template rebind_alloc<functor_wrapper_type>;
+          using wrapper_allocator_pointer_type = typename std::allocator_traits<wrapper_allocator_type>::pointer;
+
+          if (op == clone_functor_tag) {
+            // Clone the functor
+            // GCC 2.95.3 gets the CV qualifiers wrong here, so we
+            // can't do the static_cast that we should do.
+            const functor_wrapper_type* f =
+              static_cast<const functor_wrapper_type*>(in_buffer.members.obj_ptr);
+            wrapper_allocator_type wrapper_allocator(static_cast<Allocator const &>(*f));
+            wrapper_allocator_pointer_type copy = wrapper_allocator.allocate(1);
+            std::allocator_traits<wrapper_allocator_type>::construct(wrapper_allocator, copy, *f);
+
+            // Get back to the original pointer type
+            functor_wrapper_type* new_f = static_cast<functor_wrapper_type*>(copy);
+            out_buffer.members.obj_ptr = new_f;
+          } else if (op == move_functor_tag) {
+            out_buffer.members.obj_ptr = in_buffer.members.obj_ptr;
+            in_buffer.members.obj_ptr = 0;
+          } else if (op == destroy_functor_tag) {
+            /* Cast from the void pointer to the functor_wrapper_type */
+            functor_wrapper_type* victim =
+              static_cast<functor_wrapper_type*>(in_buffer.members.obj_ptr);
+            wrapper_allocator_type wrapper_allocator(static_cast<Allocator const &>(*victim));
+            std::allocator_traits<wrapper_allocator_type>::destroy(wrapper_allocator, victim);
+            wrapper_allocator.deallocate(victim,1);
+            out_buffer.members.obj_ptr = 0;
+          } else if (op == check_functor_type_tag) {
+            if (*out_buffer.members.type.type == BOOST_CORE_TYPEID(Functor))
+              out_buffer.members.obj_ptr = in_buffer.members.obj_ptr;
+            else
+              out_buffer.members.obj_ptr = 0;
+          } else /* op == get_functor_type_tag */ {
+            out_buffer.members.type.type = &BOOST_CORE_TYPEID(Functor);
+            out_buffer.members.type.const_qualified = false;
+            out_buffer.members.type.volatile_qualified = false;
+          }
+        }
+
+        // For function objects, we determine whether the function
+        // object can use the small-object optimization buffer or
+        // whether we need to allocate it on the heap.
+        static inline void
+        manager(const function_buffer& in_buffer, function_buffer& out_buffer,
+                functor_manager_operation_type op, function_obj_tag)
+        {
+          manager(in_buffer, out_buffer, op,
+                  std::integral_constant<bool, (function_allows_small_object_optimization<functor_type>::value)>());
+        }
+
+      public:
+        /* Dispatch to an appropriate manager based on whether we have a
+           function pointer or a function object pointer. */
+        static inline void
+        manage(const function_buffer& in_buffer, function_buffer& out_buffer,
+               functor_manager_operation_type op)
+        {
+          typedef typename get_function_tag<functor_type>::type tag_type;
+          if (op == get_functor_type_tag) {
+            out_buffer.members.type.type = &BOOST_CORE_TYPEID(functor_type);
+            out_buffer.members.type.const_qualified = false;
+            out_buffer.members.type.volatile_qualified = false;
+          } else {
+            manager(in_buffer, out_buffer, op, tag_type());
+          }
+        }
+      };
+
+      // A type that is only used for comparisons against zero
+      struct useless_clear_type {};
+
+      /**
+       * Stores the "manager" portion of the vtable for a
+       * boost::function object.
+       */
+      struct vtable_base
+      {
+        void (*manager)(const function_buffer& in_buffer,
+                        function_buffer& out_buffer,
+                        functor_manager_operation_type op);
+      };
+    } // end namespace function
+  } // end namespace detail
+
+/**
+ * The function_base class contains the basic elements needed for the
+ * function1, function2, function3, etc. classes. It is common to all
+ * functions (and as such can be used to tell if we have one of the
+ * functionN objects).
+ */
+class function_base
+{
+public:
+  function_base() : vtable(0) { }
+
+  /** Determine if the function is empty (i.e., has no target). */
+  bool empty() const { return !vtable; }
+
+  /** Retrieve the type of the stored function object, or type_id<void>()
+      if this is empty. */
+  const boost::core::typeinfo& target_type() const
+  {
+    if (!vtable) return BOOST_CORE_TYPEID(void);
+
+    detail::function::function_buffer type;
+    get_vtable()->manager(functor, type, detail::function::get_functor_type_tag);
+    return *type.members.type.type;
+  }
+
+  template<typename Functor>
+    Functor* target()
+    {
+      if (!vtable) return 0;
+
+      detail::function::function_buffer type_result;
+      type_result.members.type.type = &BOOST_CORE_TYPEID(Functor);
+      type_result.members.type.const_qualified = std::is_const<Functor>::value;
+      type_result.members.type.volatile_qualified = std::is_volatile<Functor>::value;
+      get_vtable()->manager(functor, type_result,
+                      detail::function::check_functor_type_tag);
+      return static_cast<Functor*>(type_result.members.obj_ptr);
+    }
+
+  template<typename Functor>
+    const Functor* target() const
+    {
+      if (!vtable) return 0;
+
+      detail::function::function_buffer type_result;
+      type_result.members.type.type = &BOOST_CORE_TYPEID(Functor);
+      type_result.members.type.const_qualified = true;
+      type_result.members.type.volatile_qualified = std::is_volatile<Functor>::value;
+      get_vtable()->manager(functor, type_result,
+                      detail::function::check_functor_type_tag);
+      // GCC 2.95.3 gets the CV qualifiers wrong here, so we
+      // can't do the static_cast that we should do.
+      return static_cast<const Functor*>(type_result.members.obj_ptr);
+    }
+
+  template<typename F>
+    typename std::enable_if< !std::is_function<F>::value, bool >::type
+    contains(const F& f) const
+    {
+      if (const F* fp = this->template target<F>())
+      {
+        return function_equal(*fp, f);
+      } else {
+        return false;
+      }
+    }
+
+  template<typename Fn>
+    typename std::enable_if< std::is_function<Fn>::value, bool >::type
+    contains(Fn& f) const
+    {
+      typedef Fn* F;
+      if (const F* fp = this->template target<F>())
+      {
+        return function_equal(*fp, &f);
+      } else {
+        return false;
+      }
+    }
+
+public: // should be protected, but GCC 2.95.3 will fail to allow access
+  detail::function::vtable_base* get_vtable() const {
+    return reinterpret_cast<detail::function::vtable_base*>(
+             reinterpret_cast<std::size_t>(vtable) & ~static_cast<std::size_t>(0x01));
+  }
+
+  bool has_trivial_copy_and_destroy() const {
+    return reinterpret_cast<std::size_t>(vtable) & 0x01;
+  }
+
+  detail::function::vtable_base* vtable;
+  mutable detail::function::function_buffer functor;
+};
+
+#if defined(BOOST_CLANG)
+#   pragma clang diagnostic push
+#   pragma clang diagnostic ignored "-Wweak-vtables"
+#endif
+/**
+ * The bad_function_call exception class is thrown when a boost::function
+ * object is invoked
+ */
+class BOOST_SYMBOL_VISIBLE bad_function_call : public std::runtime_error
+{
+public:
+  bad_function_call() : std::runtime_error("call to empty boost::function") {}
+};
+#if defined(BOOST_CLANG)
+#   pragma clang diagnostic pop
+#endif
+
+inline bool operator==(const function_base& f,
+                       detail::function::useless_clear_type*)
+{
+  return f.empty();
+}
+
+inline bool operator!=(const function_base& f,
+                       detail::function::useless_clear_type*)
+{
+  return !f.empty();
+}
+
+inline bool operator==(detail::function::useless_clear_type*,
+                       const function_base& f)
+{
+  return f.empty();
+}
+
+inline bool operator!=(detail::function::useless_clear_type*,
+                       const function_base& f)
+{
+  return !f.empty();
+}
+
+// Comparisons between boost::function objects and arbitrary function
+// objects.
+
+template<typename Functor>
+  BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor, bool)
+  operator==(const function_base& f, Functor g)
+  {
+    if (const Functor* fp = f.template target<Functor>())
+      return function_equal(*fp, g);
+    else return false;
+  }
+
+template<typename Functor>
+  BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor, bool)
+  operator==(Functor g, const function_base& f)
+  {
+    if (const Functor* fp = f.template target<Functor>())
+      return function_equal(g, *fp);
+    else return false;
+  }
+
+template<typename Functor>
+  BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor, bool)
+  operator!=(const function_base& f, Functor g)
+  {
+    if (const Functor* fp = f.template target<Functor>())
+      return !function_equal(*fp, g);
+    else return true;
+  }
+
+template<typename Functor>
+  BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor, bool)
+  operator!=(Functor g, const function_base& f)
+  {
+    if (const Functor* fp = f.template target<Functor>())
+      return !function_equal(g, *fp);
+    else return true;
+  }
+
+template<typename Functor>
+  BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor, bool)
+  operator==(const function_base& f, reference_wrapper<Functor> g)
+  {
+    if (const Functor* fp = f.template target<Functor>())
+      return fp == g.get_pointer();
+    else return false;
+  }
+
+template<typename Functor>
+  BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor, bool)
+  operator==(reference_wrapper<Functor> g, const function_base& f)
+  {
+    if (const Functor* fp = f.template target<Functor>())
+      return g.get_pointer() == fp;
+    else return false;
+  }
+
+template<typename Functor>
+  BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor, bool)
+  operator!=(const function_base& f, reference_wrapper<Functor> g)
+  {
+    if (const Functor* fp = f.template target<Functor>())
+      return fp != g.get_pointer();
+    else return true;
+  }
+
+template<typename Functor>
+  BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor, bool)
+  operator!=(reference_wrapper<Functor> g, const function_base& f)
+  {
+    if (const Functor* fp = f.template target<Functor>())
+      return g.get_pointer() != fp;
+    else return true;
+  }
+
+namespace detail {
+  namespace function {
+    inline bool has_empty_target(const function_base* f)
+    {
+      return f->empty();
+    }
+
+#if BOOST_WORKAROUND(BOOST_MSVC, <= 1310)
+    inline bool has_empty_target(const void*)
+    {
+      return false;
+    }
+#else
+    inline bool has_empty_target(...)
+    {
+      return false;
+    }
+#endif
+  } // end namespace function
+} // end namespace detail
+} // end namespace boost
+
+#undef BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL
+
+#if defined(BOOST_MSVC)
+#   pragma warning( pop )
+#endif
+
+#endif // BOOST_FUNCTION_BASE_HEADER

include/boost/function/function_fwd.hpp

@@ -0,0 +1,64 @@
+// Boost.Function library
+//  Copyright (C) Douglas Gregor 2008
+//
+//  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
+#ifndef BOOST_FUNCTION_FWD_HPP
+#define BOOST_FUNCTION_FWD_HPP
+#include <boost/config.hpp>
+
+namespace boost {
+  class bad_function_call;
+
+  // Preferred syntax
+  template<typename Signature> class function;
+
+  template<typename Signature>
+  inline void swap(function<Signature>& f1, function<Signature>& f2)
+  {
+    f1.swap(f2);
+  }
+
+  // Portable syntax
+  template<typename R, typename... T> class function_n;
+
+  template<typename R, typename... T> using function0 = function_n<R, T...>;
+  template<typename R, typename... T> using function1 = function_n<R, T...>;
+  template<typename R, typename... T> using function2 = function_n<R, T...>;
+  template<typename R, typename... T> using function3 = function_n<R, T...>;
+  template<typename R, typename... T> using function4 = function_n<R, T...>;
+  template<typename R, typename... T> using function5 = function_n<R, T...>;
+  template<typename R, typename... T> using function6 = function_n<R, T...>;
+  template<typename R, typename... T> using function7 = function_n<R, T...>;
+  template<typename R, typename... T> using function8 = function_n<R, T...>;
+  template<typename R, typename... T> using function9 = function_n<R, T...>;
+
+  template<typename R, typename... T> using function10 = function_n<R, T...>;
+  template<typename R, typename... T> using function11 = function_n<R, T...>;
+  template<typename R, typename... T> using function12 = function_n<R, T...>;
+  template<typename R, typename... T> using function13 = function_n<R, T...>;
+  template<typename R, typename... T> using function14 = function_n<R, T...>;
+  template<typename R, typename... T> using function15 = function_n<R, T...>;
+  template<typename R, typename... T> using function16 = function_n<R, T...>;
+  template<typename R, typename... T> using function17 = function_n<R, T...>;
+  template<typename R, typename... T> using function18 = function_n<R, T...>;
+  template<typename R, typename... T> using function19 = function_n<R, T...>;
+
+  template<typename R, typename... T> using function20 = function_n<R, T...>;
+  template<typename R, typename... T> using function21 = function_n<R, T...>;
+  template<typename R, typename... T> using function22 = function_n<R, T...>;
+  template<typename R, typename... T> using function23 = function_n<R, T...>;
+  template<typename R, typename... T> using function24 = function_n<R, T...>;
+  template<typename R, typename... T> using function25 = function_n<R, T...>;
+  template<typename R, typename... T> using function26 = function_n<R, T...>;
+  template<typename R, typename... T> using function27 = function_n<R, T...>;
+  template<typename R, typename... T> using function28 = function_n<R, T...>;
+  template<typename R, typename... T> using function29 = function_n<R, T...>;
+
+  template<typename R, typename... T> using function30 = function_n<R, T...>;
+}
+
+#endif

include/boost/function/function_typeof.hpp

@@ -0,0 +1,15 @@
+// Boost.Function library - Typeof support
+//  Copyright (C) Douglas Gregor 2008
+//
+//  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
+#ifndef BOOST_FUNCTION_TYPEOF_HPP
+#define BOOST_FUNCTION_TYPEOF_HPP
+#include <boost/function/function_fwd.hpp>
+
+// This header is no longer necessary and is only retained for compatibility
+
+#endif