From 86b7a7809ac0f9183deb58b99706c6f386c3d313 Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@gmail.com>
Date: Thu, 25 Jan 2024 05:06:41 +0200
Subject: [PATCH] Remove BOOST_FUNCTION_NO_VARIADIC code portions

---
 include/boost/function.hpp                    |  44 +--
 .../boost/function/detail/maybe_include.hpp   | 367 +-----------------
 include/boost/function/function_fwd.hpp       |  77 ++--
 include/boost/function/function_template.hpp  |  87 +----
 4 files changed, 40 insertions(+), 535 deletions(-)

diff --git a/include/boost/function.hpp b/include/boost/function.hpp
index 8cb9f22..48fd523 100644
--- a/include/boost/function.hpp
+++ b/include/boost/function.hpp
@@ -29,49 +29,7 @@
 // in anything that may be included by function_template.hpp doesn't break
 #include <boost/function/detail/prologue.hpp>
 
-#ifndef BOOST_FUNCTION_NO_VARIADIC
-#  include <boost/function/detail/maybe_include.hpp>
-// Older Visual Age C++ version do not handle the file iteration well
-#elif BOOST_WORKAROUND(__IBMCPP__, >= 500) && BOOST_WORKAROUND(__IBMCPP__, < 800)
-#  if BOOST_FUNCTION_MAX_ARGS >= 0
-#    include <boost/function/function0.hpp>
-#  endif
-#  if BOOST_FUNCTION_MAX_ARGS >= 1
-#    include <boost/function/function1.hpp>
-#  endif
-#  if BOOST_FUNCTION_MAX_ARGS >= 2
-#    include <boost/function/function2.hpp>
-#  endif
-#  if BOOST_FUNCTION_MAX_ARGS >= 3
-#    include <boost/function/function3.hpp>
-#  endif
-#  if BOOST_FUNCTION_MAX_ARGS >= 4
-#    include <boost/function/function4.hpp>
-#  endif
-#  if BOOST_FUNCTION_MAX_ARGS >= 5
-#    include <boost/function/function5.hpp>
-#  endif
-#  if BOOST_FUNCTION_MAX_ARGS >= 6
-#    include <boost/function/function6.hpp>
-#  endif
-#  if BOOST_FUNCTION_MAX_ARGS >= 7
-#    include <boost/function/function7.hpp>
-#  endif
-#  if BOOST_FUNCTION_MAX_ARGS >= 8
-#    include <boost/function/function8.hpp>
-#  endif
-#  if BOOST_FUNCTION_MAX_ARGS >= 9
-#    include <boost/function/function9.hpp>
-#  endif
-#  if BOOST_FUNCTION_MAX_ARGS >= 10
-#    include <boost/function/function10.hpp>
-#  endif
-#else
-// What is the '3' for?
-#  define BOOST_PP_ITERATION_PARAMS_1 (3,(0,BOOST_FUNCTION_MAX_ARGS,<boost/function/detail/function_iterate.hpp>))
-#  include BOOST_PP_ITERATE()
-#  undef BOOST_PP_ITERATION_PARAMS_1
-#endif
+#include <boost/function/detail/maybe_include.hpp>
 
 #include <boost/function/detail/epilogue.hpp>
 
diff --git a/include/boost/function/detail/maybe_include.hpp b/include/boost/function/detail/maybe_include.hpp
index df7eb7a..e34e825 100644
--- a/include/boost/function/detail/maybe_include.hpp
+++ b/include/boost/function/detail/maybe_include.hpp
@@ -7,374 +7,11 @@
 
 // For more information, see http://www.boost.org
 
-#include <boost/function/function_fwd.hpp> // for BOOST_FUNCTION_NO_VARIADIC
-
-#ifndef BOOST_FUNCTION_NO_VARIADIC
 #  undef BOOST_FUNCTION_NUM_ARGS
-#  define BOOST_FUNCTION_NUM_ARGS 50
+#  define BOOST_FUNCTION_NUM_ARGS 30
 #  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 50
+#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 30
 #  ifndef BOOST_FUNCTION_VARIADIC_INCLUDED
 #    define BOOST_FUNCTION_VARIADIC_INCLUDED
 #    include <boost/function/function_template.hpp>
 #  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 0
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 0
-#  ifndef BOOST_FUNCTION_0
-#    define BOOST_FUNCTION_0
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 1
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 1
-#  ifndef BOOST_FUNCTION_1
-#    define BOOST_FUNCTION_1
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 2
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 2
-#  ifndef BOOST_FUNCTION_2
-#    define BOOST_FUNCTION_2
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 3
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 3
-#  ifndef BOOST_FUNCTION_3
-#    define BOOST_FUNCTION_3
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 4
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 4
-#  ifndef BOOST_FUNCTION_4
-#    define BOOST_FUNCTION_4
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 5
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 5
-#  ifndef BOOST_FUNCTION_5
-#    define BOOST_FUNCTION_5
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 6
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 6
-#  ifndef BOOST_FUNCTION_6
-#    define BOOST_FUNCTION_6
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 7
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 7
-#  ifndef BOOST_FUNCTION_7
-#    define BOOST_FUNCTION_7
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 8
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 8
-#  ifndef BOOST_FUNCTION_8
-#    define BOOST_FUNCTION_8
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 9
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 9
-#  ifndef BOOST_FUNCTION_9
-#    define BOOST_FUNCTION_9
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 10
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 10
-#  ifndef BOOST_FUNCTION_10
-#    define BOOST_FUNCTION_10
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 11
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 11
-#  ifndef BOOST_FUNCTION_11
-#    define BOOST_FUNCTION_11
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 12
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 12
-#  ifndef BOOST_FUNCTION_12
-#    define BOOST_FUNCTION_12
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 13
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 13
-#  ifndef BOOST_FUNCTION_13
-#    define BOOST_FUNCTION_13
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 14
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 14
-#  ifndef BOOST_FUNCTION_14
-#    define BOOST_FUNCTION_14
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 15
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 15
-#  ifndef BOOST_FUNCTION_15
-#    define BOOST_FUNCTION_15
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 16
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 16
-#  ifndef BOOST_FUNCTION_16
-#    define BOOST_FUNCTION_16
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 17
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 17
-#  ifndef BOOST_FUNCTION_17
-#    define BOOST_FUNCTION_17
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 18
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 18
-#  ifndef BOOST_FUNCTION_18
-#    define BOOST_FUNCTION_18
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 19
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 19
-#  ifndef BOOST_FUNCTION_19
-#    define BOOST_FUNCTION_19
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 20
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 20
-#  ifndef BOOST_FUNCTION_20
-#    define BOOST_FUNCTION_20
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 21
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 21
-#  ifndef BOOST_FUNCTION_21
-#    define BOOST_FUNCTION_21
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 22
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 22
-#  ifndef BOOST_FUNCTION_22
-#    define BOOST_FUNCTION_22
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 23
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 23
-#  ifndef BOOST_FUNCTION_23
-#    define BOOST_FUNCTION_23
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 24
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 24
-#  ifndef BOOST_FUNCTION_24
-#    define BOOST_FUNCTION_24
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 25
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 25
-#  ifndef BOOST_FUNCTION_25
-#    define BOOST_FUNCTION_25
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 26
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 26
-#  ifndef BOOST_FUNCTION_26
-#    define BOOST_FUNCTION_26
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 27
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 27
-#  ifndef BOOST_FUNCTION_27
-#    define BOOST_FUNCTION_27
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 28
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 28
-#  ifndef BOOST_FUNCTION_28
-#    define BOOST_FUNCTION_28
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 29
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 29
-#  ifndef BOOST_FUNCTION_29
-#    define BOOST_FUNCTION_29
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 30
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 30
-#  ifndef BOOST_FUNCTION_30
-#    define BOOST_FUNCTION_30
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 31
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 31
-#  ifndef BOOST_FUNCTION_31
-#    define BOOST_FUNCTION_31
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 32
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 32
-#  ifndef BOOST_FUNCTION_32
-#    define BOOST_FUNCTION_32
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 33
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 33
-#  ifndef BOOST_FUNCTION_33
-#    define BOOST_FUNCTION_33
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 34
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 34
-#  ifndef BOOST_FUNCTION_34
-#    define BOOST_FUNCTION_34
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 35
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 35
-#  ifndef BOOST_FUNCTION_35
-#    define BOOST_FUNCTION_35
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 36
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 36
-#  ifndef BOOST_FUNCTION_36
-#    define BOOST_FUNCTION_36
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 37
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 37
-#  ifndef BOOST_FUNCTION_37
-#    define BOOST_FUNCTION_37
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 38
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 38
-#  ifndef BOOST_FUNCTION_38
-#    define BOOST_FUNCTION_38
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 39
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 39
-#  ifndef BOOST_FUNCTION_39
-#    define BOOST_FUNCTION_39
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 40
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 40
-#  ifndef BOOST_FUNCTION_40
-#    define BOOST_FUNCTION_40
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 41
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 41
-#  ifndef BOOST_FUNCTION_41
-#    define BOOST_FUNCTION_41
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 42
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 42
-#  ifndef BOOST_FUNCTION_42
-#    define BOOST_FUNCTION_42
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 43
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 43
-#  ifndef BOOST_FUNCTION_43
-#    define BOOST_FUNCTION_43
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 44
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 44
-#  ifndef BOOST_FUNCTION_44
-#    define BOOST_FUNCTION_44
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 45
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 45
-#  ifndef BOOST_FUNCTION_45
-#    define BOOST_FUNCTION_45
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 46
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 46
-#  ifndef BOOST_FUNCTION_46
-#    define BOOST_FUNCTION_46
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 47
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 47
-#  ifndef BOOST_FUNCTION_47
-#    define BOOST_FUNCTION_47
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 48
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 48
-#  ifndef BOOST_FUNCTION_48
-#    define BOOST_FUNCTION_48
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 49
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 49
-#  ifndef BOOST_FUNCTION_49
-#    define BOOST_FUNCTION_49
-#    include <boost/function/function_template.hpp>
-#  endif
-#elif BOOST_FUNCTION_NUM_ARGS == 50
-#  undef BOOST_FUNCTION_MAX_ARGS_DEFINED
-#  define BOOST_FUNCTION_MAX_ARGS_DEFINED 50
-#  ifndef BOOST_FUNCTION_50
-#    define BOOST_FUNCTION_50
-#    include <boost/function/function_template.hpp>
-#  endif
-#else
-#  error Cannot handle Boost.Function objects that accept more than 50 arguments!
-#endif
diff --git a/include/boost/function/function_fwd.hpp b/include/boost/function/function_fwd.hpp
index b31ec14..01e2fc0 100644
--- a/include/boost/function/function_fwd.hpp
+++ b/include/boost/function/function_fwd.hpp
@@ -24,12 +24,6 @@ namespace boost { namespace python { namespace objects {
 #  define BOOST_FUNCTION_NO_FUNCTION_TYPE_SYNTAX
 #endif
 
-#if defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) || defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)
-#  define BOOST_FUNCTION_NO_VARIADIC
-#else
-#  include <boost/preprocessor/repetition/repeat.hpp> // for functionN aliases generation below
-#endif
-
 namespace boost {
   class bad_function_call;
 
@@ -44,42 +38,43 @@ namespace boost {
   }
 #endif // have partial specialization
 
-#ifndef BOOST_FUNCTION_NO_VARIADIC
-  template<typename R, typename... T> class function_n;
-#  define BOOST_FUNCTION_N_ALIASES(z, N, d)                                   \
-    template <typename R, typename... T>                                      \
-    using function##N = function_n<R, T...>;
-
-    BOOST_PP_REPEAT(51, BOOST_FUNCTION_N_ALIASES, ~)
-#  undef BOOST_FUNCTION_N_ALIASES
-#else
   // Portable syntax
-  template<typename R> class function0;
-  template<typename R, typename T1> class function1;
-  template<typename R, typename T1, typename T2> class function2;
-  template<typename R, typename T1, typename T2, typename T3> class function3;
-  template<typename R, typename T1, typename T2, typename T3, typename T4> 
-    class function4;
-  template<typename R, typename T1, typename T2, typename T3, typename T4,
-           typename T5> 
-    class function5;
-  template<typename R, typename T1, typename T2, typename T3, typename T4,
-           typename T5, typename T6> 
-    class function6;
-  template<typename R, typename T1, typename T2, typename T3, typename T4,
-           typename T5, typename T6, typename T7> 
-    class function7;
-  template<typename R, typename T1, typename T2, typename T3, typename T4,
-           typename T5, typename T6, typename T7, typename T8> 
-    class function8;
-  template<typename R, typename T1, typename T2, typename T3, typename T4,
-           typename T5, typename T6, typename T7, typename T8, typename T9> 
-    class function9;
-  template<typename R, typename T1, typename T2, typename T3, typename T4,
-           typename T5, typename T6, typename T7, typename T8, typename T9,
-           typename T10> 
-    class function10;
-#endif
+  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
diff --git a/include/boost/function/function_template.hpp b/include/boost/function/function_template.hpp
index 1f82152..90f6118 100644
--- a/include/boost/function/function_template.hpp
+++ b/include/boost/function/function_template.hpp
@@ -18,8 +18,6 @@
 #   pragma warning( disable : 4127 ) // "conditional expression is constant"
 #endif
 
-#ifndef BOOST_FUNCTION_NO_VARIADIC
-
 #define BOOST_FUNCTION_TEMPLATE_PARMS typename... T
 #define BOOST_FUNCTION_TEMPLATE_ARGS T...
 #define BOOST_FUNCTION_PARMS T... a
@@ -49,67 +47,6 @@
 #define BOOST_FUNCTION_GET_INVOKER                  get_invoker
 #define BOOST_FUNCTION_VTABLE                       basic_vtable
 
-#else // BOOST_FUNCTION_NO_VARIADIC
-
-#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)
-
-#ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
-#   define BOOST_FUNCTION_ARGS BOOST_PP_ENUM_PARAMS(BOOST_FUNCTION_NUM_ARGS, a)
-#else
-#   define BOOST_FUNCTION_ARG(J,I,D) static_cast<BOOST_PP_CAT(T,I)&&>(BOOST_PP_CAT(a,I))
-#   define BOOST_FUNCTION_ARGS BOOST_PP_ENUM(BOOST_FUNCTION_NUM_ARGS,BOOST_FUNCTION_ARG,BOOST_PP_EMPTY)
-#endif
-
-#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)
-
-// 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_MEMBER_INVOKER \
-  BOOST_JOIN(function_mem_invoker,BOOST_FUNCTION_NUM_ARGS)
-#define BOOST_FUNCTION_VOID_MEMBER_INVOKER \
-  BOOST_JOIN(function_void_mem_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_GET_MEMBER_INVOKER \
-  BOOST_JOIN(get_member_invoker,BOOST_FUNCTION_NUM_ARGS)
-#define BOOST_FUNCTION_GET_INVOKER \
-  BOOST_JOIN(get_invoker,BOOST_FUNCTION_NUM_ARGS)
-#define BOOST_FUNCTION_VTABLE BOOST_JOIN(basic_vtable,BOOST_FUNCTION_NUM_ARGS)
-
-#endif // BOOST_FUNCTION_NO_VARIADIC
-
 #ifndef BOOST_NO_VOID_RETURNS
 #  define BOOST_FUNCTION_VOID_RETURN_TYPE void
 #  define BOOST_FUNCTION_RETURN(X) X
@@ -696,7 +633,6 @@ namespace boost {
         invoker_type invoker;
       };
 
-#ifndef BOOST_FUNCTION_NO_VARIADIC
       template <typename... T>
       struct variadic_function_base
       {};
@@ -713,7 +649,6 @@ namespace boost {
         typedef T0 first_argument_type;
         typedef T1 second_argument_type;
       };
-#endif
 
     } // end namespace function
   } // end namespace detail
@@ -723,9 +658,7 @@ namespace boost {
     BOOST_FUNCTION_TEMPLATE_PARMS
   >
   class BOOST_FUNCTION_FUNCTION : public function_base
-#ifndef BOOST_FUNCTION_NO_VARIADIC
                                 , public detail::function::variadic_function_base<T...>
-#endif
   {
   public:
 #ifndef BOOST_NO_VOID_RETURNS
@@ -755,25 +688,7 @@ namespace boost {
       typedef result_type type;
     };
 
-#ifndef BOOST_FUNCTION_NO_VARIADIC
-
-    static int const args = sizeof...(T);
-    static int const arity = sizeof...(T);
-
-#else
-
-#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, args = BOOST_FUNCTION_NUM_ARGS);
-    BOOST_STATIC_CONSTANT(int, arity = BOOST_FUNCTION_NUM_ARGS);
-    BOOST_FUNCTION_ARG_TYPES
-
-#endif
+    BOOST_STATIC_CONSTANT(int, arity = sizeof...(T));
 
     typedef BOOST_FUNCTION_FUNCTION self_type;