libitm: Remove dead code.

	* local_type_traits: Remove file.
	* libitm_i.h: Don't include it anymore.
	(sized_integral): Remove.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@232581 138bc75d-0d04-0410-961f-82ee72b054a4

3 files changed, 6 insertions, 1909 deletions

diff --git a/libitm/ChangeLog b/libitm/ChangeLog
index fd41c82d858..d0f37b1ed64 100644
--- a/libitm/ChangeLog
+++ b/libitm/ChangeLog
@@ -1,3 +1,9 @@
+2016-01-19  Torvald Riegel  <triegel@redhat.com>
+
+	* local_type_traits: Remove file.
+	* libitm_i.h: Don't include it anymore.
+	(sized_integral): Remove.
+
 2016-01-16  Torvald Riegel  <triegel@redhat.com>
 
 	* method-gl.cc (gl_wt_dispatch::trycommit): Ensure proxy privatization
diff --git a/libitm/libitm_i.h b/libitm/libitm_i.h
index 751b4abaccc..ae88ff0eccc 100644
--- a/libitm/libitm_i.h
+++ b/libitm/libitm_i.h
@@ -36,7 +36,6 @@
 #include <stdlib.h>
 #include <string.h>
 #include <unwind.h>
-#include "local_type_traits"
 #include "local_atomic"
 
 /* Don't require libgcc_s.so for exceptions.  */
@@ -49,13 +48,6 @@ namespace GTM HIDDEN {
 
 using namespace std;
 
-// A helper template for accessing an unsigned integral of SIZE bytes.
-template<size_t SIZE> struct sized_integral { };
-template<> struct sized_integral<1> { typedef uint8_t type; };
-template<> struct sized_integral<2> { typedef uint16_t type; };
-template<> struct sized_integral<4> { typedef uint32_t type; };
-template<> struct sized_integral<8> { typedef uint64_t type; };
-
 typedef unsigned int gtm_word __attribute__((mode (word)));
 
 // These values are given to GTM_restart_transaction and indicate the
diff --git a/libitm/local_type_traits b/libitm/local_type_traits
deleted file mode 100644
index 131e8d2199f..00000000000
--- a/libitm/local_type_traits
+++ /dev/null
@@ -1,1901 +0,0 @@
-// C++0x type_traits -*- C++ -*-
-
-// Copyright (C) 2007-2016 Free Software Foundation, Inc.
-//
-// This file is part of the GNU ISO C++ Library.  This library is free
-// software; you can redistribute it and/or modify it under the
-// terms of the GNU General Public License as published by the
-// Free Software Foundation; either version 3, or (at your option)
-// any later version.
-
-// This library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-
-// Under Section 7 of GPL version 3, you are granted additional
-// permissions described in the GCC Runtime Library Exception, version
-// 3.1, as published by the Free Software Foundation.
-
-// You should have received a copy of the GNU General Public License and
-// a copy of the GCC Runtime Library Exception along with this program;
-// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
-// <http://www.gnu.org/licenses/>.
-
-// ????????????????????????????????????????????????????????????????????
-//
-// This is a copy of the libstdc++ header, with the trivial modification
-// of ignoring the c++config.h include.  If and when the top-level build is
-// fixed so that target libraries can be built using the newly built, we can
-// delete this file.
-//
-// ????????????????????????????????????????????????????????????????????
-
-/** @file include/type_traits
- *  This is a Standard C++ Library header.
- */
-
-#ifndef _GLIBCXX_TYPE_TRAITS
-#define _GLIBCXX_TYPE_TRAITS 1
-
-// #pragma GCC system_header
-
-// #ifndef __GXX_EXPERIMENTAL_CXX0X__
-// # include <bits/c++0x_warning.h>
-// #else
-// #include <bits/c++config.h>
-
-namespace std // _GLIBCXX_VISIBILITY(default)
-{
-// _GLIBCXX_BEGIN_NAMESPACE_VERSION
-
-  /**
-   * @addtogroup metaprogramming
-   * @{
-   */
-
-  /// integral_constant
-  template<typename _Tp, _Tp __v>
-    struct integral_constant
-    {
-      static constexpr _Tp                  value = __v;
-      typedef _Tp                           value_type;
-      typedef integral_constant<_Tp, __v>   type;
-      constexpr operator value_type() { return value; }
-    };
-  
-  /// typedef for true_type
-  typedef integral_constant<bool, true>     true_type;
-
-  /// typedef for false_type
-  typedef integral_constant<bool, false>    false_type;
-
-  template<typename _Tp, _Tp __v>
-    constexpr _Tp integral_constant<_Tp, __v>::value;
-
-  // Meta programming helper types.
-
-  template<bool, typename, typename>
-    struct conditional;
-
-  template<typename...>
-    struct __or_;
-
-  template<>
-    struct __or_<>
-    : public false_type
-    { };
-
-  template<typename _B1>
-    struct __or_<_B1>
-    : public _B1
-    { };
-
-  template<typename _B1, typename _B2>
-    struct __or_<_B1, _B2>
-    : public conditional<_B1::value, _B1, _B2>::type
-    { };
-
-  template<typename _B1, typename _B2, typename _B3, typename... _Bn>
-    struct __or_<_B1, _B2, _B3, _Bn...>
-    : public conditional<_B1::value, _B1, __or_<_B2, _B3, _Bn...>>::type
-    { };
-
-  template<typename...>
-    struct __and_;
-
-  template<>
-    struct __and_<>
-    : public true_type
-    { };
-
-  template<typename _B1>
-    struct __and_<_B1>
-    : public _B1
-    { };
-
-  template<typename _B1, typename _B2>
-    struct __and_<_B1, _B2>
-    : public conditional<_B1::value, _B2, _B1>::type
-    { };
-
-  template<typename _B1, typename _B2, typename _B3, typename... _Bn>
-    struct __and_<_B1, _B2, _B3, _Bn...>
-    : public conditional<_B1::value, __and_<_B2, _B3, _Bn...>, _B1>::type
-    { };
-
-  template<typename _Pp>
-    struct __not_
-    : public integral_constant<bool, !_Pp::value>
-    { };
-
-  struct __sfinae_types
-  {
-    typedef char __one;
-    typedef struct { char __arr[2]; } __two;
-  };
-
-  // primary type categories.
-
-  template<typename>
-    struct remove_cv;
-
-  template<typename>
-    struct __is_void_helper
-    : public false_type { };
-
-  template<>
-    struct __is_void_helper<void>
-    : public true_type { };
-
-  /// is_void
-  template<typename _Tp>
-    struct is_void
-    : public integral_constant<bool, (__is_void_helper<typename
-				      remove_cv<_Tp>::type>::value)>
-    { };
-
-  template<typename>
-    struct __is_integral_helper
-    : public false_type { };
-
-  template<>
-    struct __is_integral_helper<bool>
-    : public true_type { };
-  
-  template<>
-    struct __is_integral_helper<char>
-    : public true_type { };
-
-  template<>
-    struct __is_integral_helper<signed char>
-    : public true_type { };
-
-  template<>
-    struct __is_integral_helper<unsigned char>
-    : public true_type { };
-
-#ifdef _GLIBCXX_USE_WCHAR_T
-  template<>
-    struct __is_integral_helper<wchar_t>
-    : public true_type { };
-#endif
-
-  template<>
-    struct __is_integral_helper<char16_t>
-    : public true_type { };
-
-  template<>
-    struct __is_integral_helper<char32_t>
-    : public true_type { };
-
-  template<>
-    struct __is_integral_helper<short>
-    : public true_type { };
-
-  template<>
-    struct __is_integral_helper<unsigned short>
-    : public true_type { };
-
-  template<>
-    struct __is_integral_helper<int>
-    : public true_type { };
-
-  template<>
-    struct __is_integral_helper<unsigned int>
-    : public true_type { };
-
-  template<>
-    struct __is_integral_helper<long>
-    : public true_type { };
-
-  template<>
-    struct __is_integral_helper<unsigned long>
-    : public true_type { };
-
-  template<>
-    struct __is_integral_helper<long long>
-    : public true_type { };
-
-  template<>
-    struct __is_integral_helper<unsigned long long>
-    : public true_type { };
-
-#if !defined(__STRICT_ANSI__) && defined(_GLIBCXX_USE_INT128)
-  template<>
-    struct __is_integral_helper<__int128>
-    : public true_type { };
-
-  template<>
-    struct __is_integral_helper<unsigned __int128>
-    : public true_type { };
-#endif
-
-  /// is_integral
-  template<typename _Tp>
-    struct is_integral
-    : public integral_constant<bool, (__is_integral_helper<typename
-				      remove_cv<_Tp>::type>::value)>
-    { };
-
-  template<typename>
-    struct __is_floating_point_helper
-    : public false_type { };
-
-  template<>
-    struct __is_floating_point_helper<float>
-    : public true_type { };
-
-  template<>
-    struct __is_floating_point_helper<double>
-    : public true_type { };
-
-  template<>
-    struct __is_floating_point_helper<long double>
-    : public true_type { };
-
-#if !defined(__STRICT_ANSI__) && defined(_GLIBCXX_USE_FLOAT128)
-  template<>
-    struct __is_floating_point_helper<__float128>
-    : public true_type { };
-#endif
-
-  /// is_floating_point
-  template<typename _Tp>
-    struct is_floating_point
-    : public integral_constant<bool, (__is_floating_point_helper<typename
-				      remove_cv<_Tp>::type>::value)>
-    { };
-
-  /// is_array
-  template<typename>
-    struct is_array
-    : public false_type { };
-
-  template<typename _Tp, size_t _Size>
-    struct is_array<_Tp[_Size]>
-    : public true_type { };
-
-  template<typename _Tp>
-    struct is_array<_Tp[]>
-    : public true_type { };
-
-  template<typename>
-    struct __is_pointer_helper
-    : public false_type { };
-
-  template<typename _Tp>
-    struct __is_pointer_helper<_Tp*>
-    : public true_type { };
-
-  /// is_pointer
-  template<typename _Tp>
-    struct is_pointer
-    : public integral_constant<bool, (__is_pointer_helper<typename
-				      remove_cv<_Tp>::type>::value)>
-    { };
-
-  /// is_lvalue_reference
-  template<typename>
-    struct is_lvalue_reference
-    : public false_type { };
-
-  template<typename _Tp>
-    struct is_lvalue_reference<_Tp&>
-    : public true_type { };
-
-  /// is_rvalue_reference
-  template<typename>
-    struct is_rvalue_reference
-    : public false_type { };
-
-  template<typename _Tp>
-    struct is_rvalue_reference<_Tp&&>
-    : public true_type { };
-
-  template<typename>
-    struct is_function;
-
-  template<typename>
-    struct __is_member_object_pointer_helper
-    : public false_type { };
-
-  template<typename _Tp, typename _Cp>
-    struct __is_member_object_pointer_helper<_Tp _Cp::*>
-    : public integral_constant<bool, !is_function<_Tp>::value> { };
-
-  /// is_member_object_pointer
-  template<typename _Tp>
-    struct is_member_object_pointer
-    : public integral_constant<bool, (__is_member_object_pointer_helper<
-				      typename remove_cv<_Tp>::type>::value)>
-    { };
-
-  template<typename>
-    struct __is_member_function_pointer_helper
-    : public false_type { };
-
-  template<typename _Tp, typename _Cp>
-    struct __is_member_function_pointer_helper<_Tp _Cp::*>
-    : public integral_constant<bool, is_function<_Tp>::value> { };
-
-  /// is_member_function_pointer
-  template<typename _Tp>
-    struct is_member_function_pointer
-    : public integral_constant<bool, (__is_member_function_pointer_helper<
-				      typename remove_cv<_Tp>::type>::value)>
-    { };
-
-  /// is_enum
-  template<typename _Tp>
-    struct is_enum
-    : public integral_constant<bool, __is_enum(_Tp)>
-    { };
-
-  /// is_union
-  template<typename _Tp>
-    struct is_union
-    : public integral_constant<bool, __is_union(_Tp)>
-    { };
-
-  /// is_class
-  template<typename _Tp>
-    struct is_class
-    : public integral_constant<bool, __is_class(_Tp)>
-    { };
-
-  /// is_function
-  template<typename>
-    struct is_function
-    : public false_type { };
-
-  template<typename _Res, typename... _ArgTypes>
-    struct is_function<_Res(_ArgTypes...)>
-    : public true_type { };
-
-  template<typename _Res, typename... _ArgTypes>
-    struct is_function<_Res(_ArgTypes......)>
-    : public true_type { };
-
-  template<typename _Res, typename... _ArgTypes>
-    struct is_function<_Res(_ArgTypes...) const>
-    : public true_type { };
-
-  template<typename _Res, typename... _ArgTypes>
-    struct is_function<_Res(_ArgTypes......) const>
-    : public true_type { };
-
-  template<typename _Res, typename... _ArgTypes>
-    struct is_function<_Res(_ArgTypes...) volatile>
-    : public true_type { };
-
-  template<typename _Res, typename... _ArgTypes>
-    struct is_function<_Res(_ArgTypes......) volatile>
-    : public true_type { };
-
-  template<typename _Res, typename... _ArgTypes>
-    struct is_function<_Res(_ArgTypes...) const volatile>
-    : public true_type { };
-
-  template<typename _Res, typename... _ArgTypes>
-    struct is_function<_Res(_ArgTypes......) const volatile>
-    : public true_type { };
-
-  template<typename>
-    struct __is_nullptr_t_helper
-    : public false_type { };
-
-#if 0
-  template<>
-    struct __is_nullptr_t_helper<nullptr_t>
-    : public true_type { };
-#endif
-
-  // __is_nullptr_t (extension).
-  template<typename _Tp>
-    struct __is_nullptr_t
-    : public integral_constant<bool, (__is_nullptr_t_helper<typename
-				      remove_cv<_Tp>::type>::value)>
-    { };
-
-  // composite type categories.
-
-  /// is_reference
-  template<typename _Tp>
-    struct is_reference
-    : public __or_<is_lvalue_reference<_Tp>,
-                   is_rvalue_reference<_Tp>>::type
-    { };
-
-  /// is_arithmetic
-  template<typename _Tp>
-    struct is_arithmetic
-    : public __or_<is_integral<_Tp>, is_floating_point<_Tp>>::type
-    { };
-
-  /// is_fundamental
-  template<typename _Tp>
-    struct is_fundamental
-    : public __or_<is_arithmetic<_Tp>, is_void<_Tp>>::type
-    { };
-
-  /// is_object
-  template<typename _Tp>
-    struct is_object
-    : public __not_<__or_<is_function<_Tp>, is_reference<_Tp>,
-                          is_void<_Tp>>>::type
-    { };
-
-  template<typename>
-    struct is_member_pointer;
-
-  /// is_scalar
-  template<typename _Tp>
-    struct is_scalar
-    : public __or_<is_arithmetic<_Tp>, is_enum<_Tp>, is_pointer<_Tp>,
-                   is_member_pointer<_Tp>, __is_nullptr_t<_Tp>>::type
-    { };
-
-  /// is_compound
-  template<typename _Tp>
-    struct is_compound
-    : public integral_constant<bool, !is_fundamental<_Tp>::value> { };
-
-  /// is_member_pointer
-  template<typename _Tp>
-    struct __is_member_pointer_helper
-    : public false_type { };
-
-  template<typename _Tp, typename _Cp>
-    struct __is_member_pointer_helper<_Tp _Cp::*>
-    : public true_type { };
-
-  template<typename _Tp>
-    struct is_member_pointer
-    : public integral_constant<bool, (__is_member_pointer_helper<
-				      typename remove_cv<_Tp>::type>::value)>
-    { };
-
-  // type properties.
-
-  /// is_const
-  template<typename>
-    struct is_const
-    : public false_type { };
-
-  template<typename _Tp>
-    struct is_const<_Tp const>
-    : public true_type { };
-  
-  /// is_volatile
-  template<typename>
-    struct is_volatile
-    : public false_type { };
-
-  template<typename _Tp>
-    struct is_volatile<_Tp volatile>
-    : public true_type { };
-
-  /// is_trivial
-  template<typename _Tp>
-    struct is_trivial
-    : public integral_constant<bool, __is_trivial(_Tp)>
-    { };
-
-  /// is_trivially_copyable (still unimplemented)
-
-  /// is_standard_layout
-  template<typename _Tp>
-    struct is_standard_layout
-    : public integral_constant<bool, __is_standard_layout(_Tp)>
-    { };
-
-  /// is_pod
-  // Could use is_standard_layout && is_trivial instead of the builtin.
-  template<typename _Tp>
-    struct is_pod
-    : public integral_constant<bool, __is_pod(_Tp)>
-    { };
-
-  /// is_literal_type
-  template<typename _Tp>
-    struct is_literal_type
-    : public integral_constant<bool, __is_literal_type(_Tp)>
-    { };
-
-  /// is_empty
-  template<typename _Tp>
-    struct is_empty
-    : public integral_constant<bool, __is_empty(_Tp)>
-    { };
-
-  /// is_polymorphic
-  template<typename _Tp>
-    struct is_polymorphic
-    : public integral_constant<bool, __is_polymorphic(_Tp)>
-    { };
-
-  /// is_abstract
-  template<typename _Tp>
-    struct is_abstract
-    : public integral_constant<bool, __is_abstract(_Tp)>
-    { };
-
-  template<typename _Tp,
-	   bool = is_integral<_Tp>::value,
-	   bool = is_floating_point<_Tp>::value>
-    struct __is_signed_helper
-    : public false_type { };
-
-  template<typename _Tp>
-    struct __is_signed_helper<_Tp, false, true>
-    : public true_type { };
-
-  template<typename _Tp>
-    struct __is_signed_helper<_Tp, true, false>
-    : public integral_constant<bool, static_cast<bool>(_Tp(-1) < _Tp(0))>
-    { };
-
-  /// is_signed
-  template<typename _Tp>
-    struct is_signed
-    : public integral_constant<bool, __is_signed_helper<_Tp>::value>
-    { };
-
-  /// is_unsigned
-  template<typename _Tp>
-    struct is_unsigned
-    : public __and_<is_arithmetic<_Tp>, __not_<is_signed<_Tp>>>::type
-    { };
-
-
-  // destructible and constructible type properties
-
-  template<typename>
-    struct add_rvalue_reference;
-
-  template<typename _Tp>
-    typename add_rvalue_reference<_Tp>::type declval() noexcept;
-
-  template<typename, unsigned = 0>
-    struct extent;
-
-  template<typename>
-    struct remove_all_extents;
-
-  template<typename _Tp>
-    struct __is_array_known_bounds
-    : public integral_constant<bool, (extent<_Tp>::value > 0)>
-    { };
-
-  template<typename _Tp>
-    struct __is_array_unknown_bounds
-    : public __and_<is_array<_Tp>, __not_<extent<_Tp>>>::type
-    { };
-    
-  // In N3290 is_destructible does not say anything about function 
-  // types and abstract types, see LWG 2049. This implementation
-  // describes function types as trivially nothrow destructible and
-  // abstract types as destructible, iff the  explicit destructor
-  // call expression is wellformed.
-  struct __do_is_destructible_impl_1
-  {
-    template<typename _Up>
-      struct __w { _Up __u; };
-
-    template<typename _Tp, typename
-             = decltype(declval<__w<_Tp>&>().~__w<_Tp>())>
-      static true_type __test(int);
-
-    template<typename>
-      static false_type __test(...);
-  };
-
-  template<typename _Tp>
-    struct __is_destructible_impl_1
-    : public __do_is_destructible_impl_1
-    {
-      typedef decltype(__test<_Tp>(0)) type;
-    };
-
-  // Special implementation for abstract types
-  struct __do_is_destructible_impl_2
-  {
-    template<typename _Tp, typename = decltype(declval<_Tp&>().~_Tp())>
-      static true_type __test(int);
-
-    template<typename>
-      static false_type __test(...);
-  };
-
-  template<typename _Tp>
-    struct __is_destructible_impl_2
-    : public __do_is_destructible_impl_2
-    {
-      typedef decltype(__test<_Tp>(0)) type;
-    };
-
-  template<typename _Tp,
-           bool = __or_<is_void<_Tp>,
-                        __is_array_unknown_bounds<_Tp>>::value,
-           bool = __or_<is_reference<_Tp>, is_function<_Tp>>::value>
-    struct __is_destructible_safe;
-
-  template<typename _Tp>
-    struct __is_destructible_safe<_Tp, false, false>
-    : public conditional<is_abstract<_Tp>::value,
-			 __is_destructible_impl_2<_Tp>,
-                         __is_destructible_impl_1<_Tp>>::type::type
-    { };
-
-  template<typename _Tp>
-    struct __is_destructible_safe<_Tp, true, false>
-    : public false_type { };
-
-  template<typename _Tp>
-    struct __is_destructible_safe<_Tp, false, true>
-    : public true_type { };
-
-  /// is_destructible
-  template<typename _Tp>
-    struct is_destructible
-    : public integral_constant<bool, (__is_destructible_safe<_Tp>::value)>
-    { };
-
-  struct __do_is_default_constructible_impl
-  {
-    template<typename _Tp, typename = decltype(_Tp())>
-      static true_type __test(int);
-
-    template<typename>
-      static false_type __test(...);
-  };
-
-  template<typename _Tp>
-    struct __is_default_constructible_impl
-    : public __do_is_default_constructible_impl
-    {
-      typedef decltype(__test<_Tp>(0)) type;
-    };
-
-  template<typename _Tp>
-    struct __is_default_constructible_atom
-    : public __and_<__not_<is_void<_Tp>>,
-                    __is_default_constructible_impl<_Tp>>::type
-    { };
-
-  template<typename _Tp, bool = is_array<_Tp>::value>
-    struct __is_default_constructible_safe;
-
-  // The following technique is a workaround for a current core language
-  // restriction, which does not allow for array types to occur in 
-  // functional casts of the form T().  Complete arrays can be default-
-  // constructed, if the element type is default-constructible, but 
-  // arrays with unknown bounds are not.
-  template<typename _Tp>
-    struct __is_default_constructible_safe<_Tp, true>
-    : public __and_<__is_array_known_bounds<_Tp>,
-		    __is_default_constructible_atom<typename
-                      remove_all_extents<_Tp>::type>>::type
-    { };
-
-  template<typename _Tp>
-    struct __is_default_constructible_safe<_Tp, false>
-    : public __is_default_constructible_atom<_Tp>::type
-    { };
-
-  /// is_default_constructible
-  template<typename _Tp>
-    struct is_default_constructible
-    : public integral_constant<bool, (__is_default_constructible_safe<
-				      _Tp>::value)>
-    { };
-
-
-  // Implementation of is_constructible.
-
-  // The hardest part of this trait is the binary direct-initialization
-  // case, because we hit into a functional cast of the form T(arg).
-  // This implementation uses different strategies depending on the
-  // target type to reduce the test overhead as much as possible:
-  //
-  // a) For a reference target type, we use a static_cast expression 
-  //    modulo its extra cases.
-  //
-  // b) For a non-reference target type we use a ::new expression.
-  struct __do_is_static_castable_impl
-  {
-    template<typename _From, typename _To, typename
-             = decltype(static_cast<_To>(declval<_From>()))>
-      static true_type __test(int);
-
-    template<typename, typename>
-      static false_type __test(...);
-  };
-
-  template<typename _From, typename _To>
-    struct __is_static_castable_impl
-    : public __do_is_static_castable_impl
-    {
-      typedef decltype(__test<_From, _To>(0)) type;
-    };
-
-  template<typename _From, typename _To>
-    struct __is_static_castable_safe
-    : public __is_static_castable_impl<_From, _To>::type
-    { };
-
-  // __is_static_castable
-  template<typename _From, typename _To>
-    struct __is_static_castable
-    : public integral_constant<bool, (__is_static_castable_safe<
-				      _From, _To>::value)>
-    { };
-
-  // Implementation for non-reference types. To meet the proper
-  // variable definition semantics, we also need to test for
-  // is_destructible in this case.
-  struct __do_is_direct_constructible_impl
-  {
-    template<typename _Tp, typename _Arg, typename
-	     = decltype(::new _Tp(declval<_Arg>()))>
-      static true_type __test(int);
-
-    template<typename, typename>
-      static false_type __test(...);
-  };
-
-  template<typename _Tp, typename _Arg>
-    struct __is_direct_constructible_impl
-    : public __do_is_direct_constructible_impl
-    {
-      typedef decltype(__test<_Tp, _Arg>(0)) type;
-    };
-
-  template<typename _Tp, typename _Arg>
-    struct __is_direct_constructible_new_safe
-    : public __and_<is_destructible<_Tp>,
-                    __is_direct_constructible_impl<_Tp, _Arg>>::type
-    { };
-
-  template<typename, typename>
-    struct is_same;
-
-  template<typename, typename>
-    struct is_base_of;
-
-  template<typename>
-    struct remove_reference;
-
-  template<typename _From, typename _To, bool
-           = is_reference<_From>::value>
-    struct __is_base_to_derived_ref;
-
-  template<typename _From, typename _To>
-    struct __is_base_to_derived_ref<_From, _To, true>
-    {
-      typedef typename remove_cv<typename remove_reference<_From
-        >::type>::type __src_t;
-      typedef typename remove_cv<typename remove_reference<_To
-        >::type>::type __dst_t;
-      typedef __and_<__not_<is_same<__src_t, __dst_t>>,
-		     is_base_of<__src_t, __dst_t>> type;
-      static constexpr bool value = type::value;
-    };
-
-  template<typename _From, typename _To>
-    struct __is_base_to_derived_ref<_From, _To, false>
-    : public false_type
-    { };
-
-  template<typename _From, typename _To, bool
-           = __and_<is_lvalue_reference<_From>,
-                    is_rvalue_reference<_To>>::value>
-    struct __is_lvalue_to_rvalue_ref;
-
-  template<typename _From, typename _To>
-    struct __is_lvalue_to_rvalue_ref<_From, _To, true>
-    {
-      typedef typename remove_cv<typename remove_reference<
-        _From>::type>::type __src_t;
-      typedef typename remove_cv<typename remove_reference<
-        _To>::type>::type __dst_t;
-      typedef __or_<is_same<__src_t, __dst_t>,
-		    is_base_of<__dst_t, __src_t>> type;
-      static constexpr bool value = type::value;
-    };
-
-  template<typename _From, typename _To>
-    struct __is_lvalue_to_rvalue_ref<_From, _To, false>
-    : public false_type
-    { };
-
-  // Here we handle direct-initialization to a reference type as 
-  // equivalent to a static_cast modulo overshooting conversions.
-  // These are restricted to the following conversions:
-  //    a) A glvalue of a base class to a derived class reference
-  //    b) An lvalue to an rvalue-reference of reference-compatible 
-  //       types
-  template<typename _Tp, typename _Arg>
-    struct __is_direct_constructible_ref_cast
-    : public __and_<__is_static_castable<_Arg, _Tp>,
-                    __not_<__or_<__is_base_to_derived_ref<_Arg, _Tp>,
-                                 __is_lvalue_to_rvalue_ref<_Arg, _Tp>
-                   >>>::type
-    { };
-
-  template<typename _Tp, typename _Arg>
-    struct __is_direct_constructible_new
-    : public conditional<is_reference<_Tp>::value,
-			 __is_direct_constructible_ref_cast<_Tp, _Arg>,
-			 __is_direct_constructible_new_safe<_Tp, _Arg>
-			 >::type
-    { };
-
-  template<typename _Tp, typename _Arg>
-    struct __is_direct_constructible
-    : public integral_constant<bool, (__is_direct_constructible_new<
-				      _Tp, _Arg>::value)>
-    { };
-
-  // Since default-construction and binary direct-initialization have
-  // been handled separately, the implementation of the remaining
-  // n-ary construction cases is rather straightforward.
-  struct __do_is_nary_constructible_impl
-  {
-    template<typename _Tp, typename... _Args, typename
-             = decltype(_Tp(declval<_Args>()...))>
-      static true_type __test(int);
-
-    template<typename, typename...>
-      static false_type __test(...);
-  };
-
-  template<typename _Tp, typename... _Args>
-    struct __is_nary_constructible_impl
-    : public __do_is_nary_constructible_impl
-    {
-      typedef decltype(__test<_Tp, _Args...>(0)) type;
-    };
-
-  template<typename _Tp, typename... _Args>
-    struct __is_nary_constructible
-    : public __is_nary_constructible_impl<_Tp, _Args...>::type
-    {
-      static_assert(sizeof...(_Args) > 1,
-                    "Only useful for > 1 arguments");
-    };
-
-  template<typename _Tp, typename... _Args>
-    struct __is_constructible_impl
-    : public __is_nary_constructible<_Tp, _Args...>
-    { };
-
-  template<typename _Tp, typename _Arg>
-    struct __is_constructible_impl<_Tp, _Arg>
-    : public __is_direct_constructible<_Tp, _Arg>
-    { };
-
-  template<typename _Tp>
-    struct __is_constructible_impl<_Tp>
-    : public is_default_constructible<_Tp>
-    { };
-
-  /// is_constructible
-  template<typename _Tp, typename... _Args>
-    struct is_constructible
-    : public integral_constant<bool, (__is_constructible_impl<_Tp,
-				      _Args...>::value)>
-    { };
-
-  template<typename _Tp, bool = is_void<_Tp>::value>
-    struct __is_copy_constructible_impl;
-
-  template<typename _Tp>
-    struct __is_copy_constructible_impl<_Tp, true>
-    : public false_type { };
-
-  template<typename _Tp>
-    struct __is_copy_constructible_impl<_Tp, false>
-    : public is_constructible<_Tp, const _Tp&>
-    { };
-
-  /// is_copy_constructible
-  template<typename _Tp>
-    struct is_copy_constructible
-    : public __is_copy_constructible_impl<_Tp>
-    { };
-
-  template<typename _Tp, bool = is_void<_Tp>::value>
-    struct __is_move_constructible_impl;
-
-  template<typename _Tp>
-    struct __is_move_constructible_impl<_Tp, true>
-    : public false_type { };
-
-  template<typename _Tp>
-    struct __is_move_constructible_impl<_Tp, false>
-    : public is_constructible<_Tp, _Tp&&>
-    { };
-
-  /// is_move_constructible
-  template<typename _Tp>
-    struct is_move_constructible
-    : public __is_move_constructible_impl<_Tp>
-    { };
-
-  template<typename _Tp>
-    struct __is_nt_default_constructible_atom
-    : public integral_constant<bool, noexcept(_Tp())>
-    { };
-
-  template<typename _Tp, bool = is_array<_Tp>::value>
-    struct __is_nt_default_constructible_impl;
-
-  template<typename _Tp>
-    struct __is_nt_default_constructible_impl<_Tp, true>
-    : public __and_<__is_array_known_bounds<_Tp>,
-		    __is_nt_default_constructible_atom<typename
-                      remove_all_extents<_Tp>::type>>::type
-    { };
-
-  template<typename _Tp>
-    struct __is_nt_default_constructible_impl<_Tp, false>
-    : public __is_nt_default_constructible_atom<_Tp>
-    { };
-
-  /// is_nothrow_default_constructible
-  template<typename _Tp>
-    struct is_nothrow_default_constructible
-    : public __and_<is_default_constructible<_Tp>,
-                    __is_nt_default_constructible_impl<_Tp>>::type
-    { };
-
-  template<typename _Tp, typename... _Args>
-    struct __is_nt_constructible_impl
-    : public integral_constant<bool, noexcept(_Tp(declval<_Args>()...))>
-    { };
-
-  template<typename _Tp, typename _Arg>
-    struct __is_nt_constructible_impl<_Tp, _Arg>
-    : public integral_constant<bool,
-                               noexcept(static_cast<_Tp>(declval<_Arg>()))>
-    { };
-
-  template<typename _Tp>
-    struct __is_nt_constructible_impl<_Tp>
-    : public is_nothrow_default_constructible<_Tp>
-    { };
-
-  /// is_nothrow_constructible
-  template<typename _Tp, typename... _Args>
-    struct is_nothrow_constructible
-    : public __and_<is_constructible<_Tp, _Args...>,
-		    __is_nt_constructible_impl<_Tp, _Args...>>::type
-    { };
-
-  template<typename _Tp, bool = is_void<_Tp>::value>
-    struct __is_nothrow_copy_constructible_impl;
-
-  template<typename _Tp>
-    struct __is_nothrow_copy_constructible_impl<_Tp, true>
-    : public false_type { };
-
-  template<typename _Tp>
-    struct __is_nothrow_copy_constructible_impl<_Tp, false>
-    : public is_nothrow_constructible<_Tp, const _Tp&>
-    { };
-
-  /// is_nothrow_copy_constructible
-  template<typename _Tp>
-    struct is_nothrow_copy_constructible
-    : public __is_nothrow_copy_constructible_impl<_Tp>
-    { };
-
-  template<typename _Tp, bool = is_void<_Tp>::value>
-    struct __is_nothrow_move_constructible_impl;
-
-  template<typename _Tp>
-    struct __is_nothrow_move_constructible_impl<_Tp, true>
-    : public false_type { };
-
-  template<typename _Tp>
-    struct __is_nothrow_move_constructible_impl<_Tp, false>
-    : public is_nothrow_constructible<_Tp, _Tp&&>
-    { };
-
-  /// is_nothrow_move_constructible
-  template<typename _Tp>
-    struct is_nothrow_move_constructible
-    : public __is_nothrow_move_constructible_impl<_Tp>
-    { };
-
-  template<typename _Tp, typename _Up>
-    class __is_assignable_helper
-    : public __sfinae_types
-    {
-      template<typename _Tp1, typename _Up1>
-        static decltype(declval<_Tp1>() = declval<_Up1>(), __one())
-	__test(int);
-
-      template<typename, typename>
-        static __two __test(...);
-
-    public:
-      static constexpr bool value = sizeof(__test<_Tp, _Up>(0)) == 1;
-    };
-
-  /// is_assignable
-  template<typename _Tp, typename _Up>
-    struct is_assignable
-    : public integral_constant<bool,
-                               __is_assignable_helper<_Tp, _Up>::value>
-    { };
-
-  template<typename _Tp, bool = is_void<_Tp>::value>
-    struct __is_copy_assignable_impl;
-
-  template<typename _Tp>
-    struct __is_copy_assignable_impl<_Tp, true>
-    : public false_type { };
-
-  template<typename _Tp>
-    struct __is_copy_assignable_impl<_Tp, false>
-    : public is_assignable<_Tp&, const _Tp&>
-    { };
-
-  /// is_copy_assignable
-  template<typename _Tp>
-    struct is_copy_assignable
-    : public __is_copy_assignable_impl<_Tp>
-    { };
-
-  template<typename _Tp, bool = is_void<_Tp>::value>
-    struct __is_move_assignable_impl;
-
-  template<typename _Tp>
-    struct __is_move_assignable_impl<_Tp, true>
-    : public false_type { };
-
-  template<typename _Tp>
-    struct __is_move_assignable_impl<_Tp, false>
-    : public is_assignable<_Tp&, _Tp&&>
-    { };
-
-  /// is_move_assignable
-  template<typename _Tp>
-    struct is_move_assignable
-    : public __is_move_assignable_impl<_Tp>
-    { };
-
-  template<typename _Tp, typename _Up>
-    struct __is_nt_assignable_impl
-    : public integral_constant<bool, noexcept(declval<_Tp>() = declval<_Up>())>
-    { };
-
-  /// is_nothrow_assignable
-  template<typename _Tp, typename _Up>
-    struct is_nothrow_assignable
-    : public __and_<is_assignable<_Tp, _Up>,
-		    __is_nt_assignable_impl<_Tp, _Up>>::type
-    { };
-
-  template<typename _Tp, bool = is_void<_Tp>::value>
-    struct __is_nt_copy_assignable_impl;
-
-  template<typename _Tp>
-    struct __is_nt_copy_assignable_impl<_Tp, true>
-    : public false_type { };
-
-  template<typename _Tp>
-    struct __is_nt_copy_assignable_impl<_Tp, false>
-    : public is_nothrow_assignable<_Tp&, const _Tp&>
-    { };
-
-  /// is_nothrow_copy_assignable
-  template<typename _Tp>
-    struct is_nothrow_copy_assignable
-    : public __is_nt_copy_assignable_impl<_Tp>
-    { };
-
-  template<typename _Tp, bool = is_void<_Tp>::value>
-    struct __is_nt_move_assignable_impl;
-
-  template<typename _Tp>
-    struct __is_nt_move_assignable_impl<_Tp, true>
-    : public false_type { };
-
-  template<typename _Tp>
-    struct __is_nt_move_assignable_impl<_Tp, false>
-    : public is_nothrow_assignable<_Tp&, _Tp&&>
-    { };
-
-  /// is_nothrow_move_assignable
-  template<typename _Tp>
-    struct is_nothrow_move_assignable
-    : public __is_nt_move_assignable_impl<_Tp>
-    { };
-
-  /// has_trivial_default_constructor
-  template<typename _Tp>
-    struct has_trivial_default_constructor
-    : public integral_constant<bool, __has_trivial_constructor(_Tp)>
-    { };
-
-  /// has_trivial_copy_constructor
-  template<typename _Tp>
-    struct has_trivial_copy_constructor
-    : public integral_constant<bool, __has_trivial_copy(_Tp)>
-    { };
-
-  /// has_trivial_copy_assign
-  template<typename _Tp>
-    struct has_trivial_copy_assign
-    : public integral_constant<bool, __has_trivial_assign(_Tp)>
-    { };
-
-  /// has_trivial_destructor
-  template<typename _Tp>
-    struct has_trivial_destructor
-    : public integral_constant<bool, __has_trivial_destructor(_Tp)>
-    { };
-
-  /// has_virtual_destructor
-  template<typename _Tp>
-    struct has_virtual_destructor
-    : public integral_constant<bool, __has_virtual_destructor(_Tp)>
-    { };
-
-  
-  // type property queries.
-
-  /// alignment_of
-  template<typename _Tp>
-    struct alignment_of
-    : public integral_constant<size_t, __alignof__(_Tp)> { };
-  
-  /// rank
-  template<typename>
-    struct rank
-    : public integral_constant<size_t, 0> { };
-   
-  template<typename _Tp, size_t _Size>
-    struct rank<_Tp[_Size]>
-    : public integral_constant<size_t, 1 + rank<_Tp>::value> { };
-
-  template<typename _Tp>
-    struct rank<_Tp[]>
-    : public integral_constant<size_t, 1 + rank<_Tp>::value> { };
-
-  /// extent
-  template<typename, unsigned _Uint>
-    struct extent
-    : public integral_constant<size_t, 0> { };
-  
-  template<typename _Tp, unsigned _Uint, size_t _Size>
-    struct extent<_Tp[_Size], _Uint>
-    : public integral_constant<size_t,
-			       _Uint == 0 ? _Size : extent<_Tp,
-							   _Uint - 1>::value>
-    { };
-
-  template<typename _Tp, unsigned _Uint>
-    struct extent<_Tp[], _Uint>
-    : public integral_constant<size_t,
-			       _Uint == 0 ? 0 : extent<_Tp,
-						       _Uint - 1>::value>
-    { };
-
-
-  // type relations.
-
-  /// is_same
-  template<typename, typename>
-    struct is_same
-    : public false_type { };
-
-  template<typename _Tp>
-    struct is_same<_Tp, _Tp>
-    : public true_type { };
-
-  /// is_base_of
-  template<typename _Base, typename _Derived>
-    struct is_base_of
-    : public integral_constant<bool, __is_base_of(_Base, _Derived)>
-    { };
-
-  template<typename _From, typename _To,
-           bool = __or_<is_void<_From>, is_function<_To>,
-                        is_array<_To>>::value>
-    struct __is_convertible_helper
-    { static constexpr bool value = is_void<_To>::value; };
-
-  template<typename _From, typename _To>
-    class __is_convertible_helper<_From, _To, false>
-    : public __sfinae_types
-    {
-      template<typename _To1>
-        static void __test_aux(_To1);
-
-      template<typename _From1, typename _To1>
-        static decltype(__test_aux<_To1>(declval<_From1>()), __one())
-	__test(int);
-
-      template<typename, typename>
-        static __two __test(...);
-
-    public:
-      static constexpr bool value = sizeof(__test<_From, _To>(0)) == 1;
-    };
-
-  /// is_convertible
-  template<typename _From, typename _To>
-    struct is_convertible
-    : public integral_constant<bool,
-			       __is_convertible_helper<_From, _To>::value>
-    { };
-
-  /// is_explicitly_convertible
-  template<typename _From, typename _To>
-    struct is_explicitly_convertible
-    : public is_constructible<_To, _From>
-    { };
-
-
-  // const-volatile modifications.
-
-  /// remove_const
-  template<typename _Tp>
-    struct remove_const
-    { typedef _Tp     type; };
-
-  template<typename _Tp>
-    struct remove_const<_Tp const>
-    { typedef _Tp     type; };
-  
-  /// remove_volatile
-  template<typename _Tp>
-    struct remove_volatile
-    { typedef _Tp     type; };
-
-  template<typename _Tp>
-    struct remove_volatile<_Tp volatile>
-    { typedef _Tp     type; };
-  
-  /// remove_cv
-  template<typename _Tp>
-    struct remove_cv
-    {
-      typedef typename
-      remove_const<typename remove_volatile<_Tp>::type>::type     type;
-    };
-  
-  /// add_const
-  template<typename _Tp>
-    struct add_const
-    { typedef _Tp const     type; };
-   
-  /// add_volatile
-  template<typename _Tp>
-    struct add_volatile
-    { typedef _Tp volatile     type; };
-  
-  /// add_cv
-  template<typename _Tp>
-    struct add_cv
-    {
-      typedef typename
-      add_const<typename add_volatile<_Tp>::type>::type     type;
-    };
-
-
-  // Reference transformations.
-
-  /// remove_reference
-  template<typename _Tp>
-    struct remove_reference
-    { typedef _Tp   type; };
-
-  template<typename _Tp>
-    struct remove_reference<_Tp&>
-    { typedef _Tp   type; };
-
-  template<typename _Tp>
-    struct remove_reference<_Tp&&>
-    { typedef _Tp   type; };
-
-  template<typename _Tp,
-	   bool = __and_<__not_<is_reference<_Tp>>,
-                         __not_<is_void<_Tp>>>::value,
-	   bool = is_rvalue_reference<_Tp>::value>
-    struct __add_lvalue_reference_helper
-    { typedef _Tp   type; };
-
-  template<typename _Tp>
-    struct __add_lvalue_reference_helper<_Tp, true, false>
-    { typedef _Tp&   type; };
-
-  template<typename _Tp>
-    struct __add_lvalue_reference_helper<_Tp, false, true>
-    { typedef typename remove_reference<_Tp>::type&   type; };
-
-  /// add_lvalue_reference
-  template<typename _Tp>
-    struct add_lvalue_reference
-    : public __add_lvalue_reference_helper<_Tp>
-    { };
-
-  template<typename _Tp,
-           bool = __and_<__not_<is_reference<_Tp>>,
-                         __not_<is_void<_Tp>>>::value>
-    struct __add_rvalue_reference_helper
-    { typedef _Tp   type; };
-
-  template<typename _Tp>
-    struct __add_rvalue_reference_helper<_Tp, true>
-    { typedef _Tp&&   type; };
-
-  /// add_rvalue_reference
-  template<typename _Tp>
-    struct add_rvalue_reference
-    : public __add_rvalue_reference_helper<_Tp>
-    { };
-
-
-  // sign modifications.
-
-  // Utility for constructing identically cv-qualified types.
-  template<typename _Unqualified, bool _IsConst, bool _IsVol>
-    struct __cv_selector;
-
-  template<typename _Unqualified>
-    struct __cv_selector<_Unqualified, false, false>
-    { typedef _Unqualified __type; };
-
-  template<typename _Unqualified>
-    struct __cv_selector<_Unqualified, false, true>
-    { typedef volatile _Unqualified __type; };
-
-  template<typename _Unqualified>
-    struct __cv_selector<_Unqualified, true, false>
-    { typedef const _Unqualified __type; };
-
-  template<typename _Unqualified>
-    struct __cv_selector<_Unqualified, true, true>
-    { typedef const volatile _Unqualified __type; };
-
-  template<typename _Qualified, typename _Unqualified,
-	   bool _IsConst = is_const<_Qualified>::value,
-	   bool _IsVol = is_volatile<_Qualified>::value>
-    class __match_cv_qualifiers
-    {
-      typedef __cv_selector<_Unqualified, _IsConst, _IsVol> __match;
-
-    public:
-      typedef typename __match::__type __type; 
-    };
-
-  // Utility for finding the unsigned versions of signed integral types.
-  template<typename _Tp>
-    struct __make_unsigned
-    { typedef _Tp __type; };
-
-  template<>
-    struct __make_unsigned<char>
-    { typedef unsigned char __type; };
-
-  template<>
-    struct __make_unsigned<signed char>
-    { typedef unsigned char __type; };
-
-  template<>
-    struct __make_unsigned<short>
-    { typedef unsigned short __type; };
-
-  template<>
-    struct __make_unsigned<int>
-    { typedef unsigned int __type; };
-
-  template<>
-    struct __make_unsigned<long>
-    { typedef unsigned long __type; };
-
-  template<>
-    struct __make_unsigned<long long>
-    { typedef unsigned long long __type; };
-
-#if !defined(__STRICT_ANSI__) && defined(_GLIBCXX_USE_INT128)
-  template<>
-    struct __make_unsigned<__int128>
-    { typedef unsigned __int128 __type; };
-#endif
-
-  // Select between integral and enum: not possible to be both.
-  template<typename _Tp, 
-	   bool _IsInt = is_integral<_Tp>::value,
-	   bool _IsEnum = is_enum<_Tp>::value>
-    class __make_unsigned_selector;
-
-  template<typename _Tp>
-    class __make_unsigned_selector<_Tp, true, false>
-    {
-      typedef __make_unsigned<typename remove_cv<_Tp>::type> __unsignedt;
-      typedef typename __unsignedt::__type __unsigned_type;
-      typedef __match_cv_qualifiers<_Tp, __unsigned_type> __cv_unsigned;
-
-    public:
-      typedef typename __cv_unsigned::__type __type;
-    };
-
-  template<typename _Tp>
-    class __make_unsigned_selector<_Tp, false, true>
-    {
-      // With -fshort-enums, an enum may be as small as a char.
-      typedef unsigned char __smallest;
-      static const bool __b0 = sizeof(_Tp) <= sizeof(__smallest);
-      static const bool __b1 = sizeof(_Tp) <= sizeof(unsigned short);
-      static const bool __b2 = sizeof(_Tp) <= sizeof(unsigned int);
-      typedef conditional<__b2, unsigned int, unsigned long> __cond2;
-      typedef typename __cond2::type __cond2_type;
-      typedef conditional<__b1, unsigned short, __cond2_type> __cond1;
-      typedef typename __cond1::type __cond1_type;
-
-    public:
-      typedef typename conditional<__b0, __smallest, __cond1_type>::type __type;
-    };
-
-  // Given an integral/enum type, return the corresponding unsigned
-  // integer type.
-  // Primary template.
-  /// make_unsigned
-  template<typename _Tp>
-    struct make_unsigned 
-    { typedef typename __make_unsigned_selector<_Tp>::__type type; };
-
-  // Integral, but don't define.
-  template<>
-    struct make_unsigned<bool>;
-
-
-  // Utility for finding the signed versions of unsigned integral types.
-  template<typename _Tp>
-    struct __make_signed
-    { typedef _Tp __type; };
-
-  template<>
-    struct __make_signed<char>
-    { typedef signed char __type; };
-
-  template<>
-    struct __make_signed<unsigned char>
-    { typedef signed char __type; };
-
-  template<>
-    struct __make_signed<unsigned short>
-    { typedef signed short __type; };
-
-  template<>
-    struct __make_signed<unsigned int>
-    { typedef signed int __type; };
-
-  template<>
-    struct __make_signed<unsigned long>
-    { typedef signed long __type; };
-
-  template<>
-    struct __make_signed<unsigned long long>
-    { typedef signed long long __type; };
-
-#if !defined(__STRICT_ANSI__) && defined(_GLIBCXX_USE_INT128)
-  template<>
-    struct __make_signed<unsigned __int128>
-    { typedef __int128 __type; };
-#endif
-
-  // Select between integral and enum: not possible to be both.
-  template<typename _Tp, 
-	   bool _IsInt = is_integral<_Tp>::value,
-	   bool _IsEnum = is_enum<_Tp>::value>
-    class __make_signed_selector;
-
-  template<typename _Tp>
-    class __make_signed_selector<_Tp, true, false>
-    {
-      typedef __make_signed<typename remove_cv<_Tp>::type> __signedt;
-      typedef typename __signedt::__type __signed_type;
-      typedef __match_cv_qualifiers<_Tp, __signed_type> __cv_signed;
-
-    public:
-      typedef typename __cv_signed::__type __type;
-    };
-
-  template<typename _Tp>
-    class __make_signed_selector<_Tp, false, true>
-    {
-      // With -fshort-enums, an enum may be as small as a char.
-      typedef signed char __smallest;
-      static const bool __b0 = sizeof(_Tp) <= sizeof(__smallest);
-      static const bool __b1 = sizeof(_Tp) <= sizeof(signed short);
-      static const bool __b2 = sizeof(_Tp) <= sizeof(signed int);
-      typedef conditional<__b2, signed int, signed long> __cond2;
-      typedef typename __cond2::type __cond2_type;
-      typedef conditional<__b1, signed short, __cond2_type> __cond1;
-      typedef typename __cond1::type __cond1_type;
-
-    public:
-      typedef typename conditional<__b0, __smallest, __cond1_type>::type __type;
-    };
-
-  // Given an integral/enum type, return the corresponding signed
-  // integer type.
-  // Primary template.
-  /// make_signed
-  template<typename _Tp>
-    struct make_signed 
-    { typedef typename __make_signed_selector<_Tp>::__type type; };
-
-  // Integral, but don't define.
-  template<>
-    struct make_signed<bool>;
-
-
-  // array modifications.
-
-  /// remove_extent
-  template<typename _Tp>
-    struct remove_extent
-    { typedef _Tp     type; };
-
-  template<typename _Tp, size_t _Size>
-    struct remove_extent<_Tp[_Size]>
-    { typedef _Tp     type; };
-
-  template<typename _Tp>
-    struct remove_extent<_Tp[]>
-    { typedef _Tp     type; };
-
-  /// remove_all_extents
-  template<typename _Tp>
-    struct remove_all_extents
-    { typedef _Tp     type; };
-
-  template<typename _Tp, size_t _Size>
-    struct remove_all_extents<_Tp[_Size]>
-    { typedef typename remove_all_extents<_Tp>::type     type; };
-
-  template<typename _Tp>
-    struct remove_all_extents<_Tp[]>
-    { typedef typename remove_all_extents<_Tp>::type     type; };
-
-
-  // pointer modifications.
-
-  template<typename _Tp, typename>
-    struct __remove_pointer_helper
-    { typedef _Tp     type; };
-
-  template<typename _Tp, typename _Up>
-    struct __remove_pointer_helper<_Tp, _Up*>
-    { typedef _Up     type; };
-
-  /// remove_pointer
-  template<typename _Tp>
-    struct remove_pointer
-    : public __remove_pointer_helper<_Tp, typename remove_cv<_Tp>::type>
-    { };
-
-  /// add_pointer
-  template<typename _Tp>
-    struct add_pointer
-    { typedef typename remove_reference<_Tp>::type*     type; };
-
-
-  template<size_t _Len>
-    struct __aligned_storage_msa
-    { 
-      union __type
-      {
-	unsigned char __data[_Len];
-	struct __attribute__((__aligned__)) { } __align; 
-      };
-    };
-
-  /**
-   *  @brief Alignment type.
-   *
-   *  The value of _Align is a default-alignment which shall be the
-   *  most stringent alignment requirement for any C++ object type
-   *  whose size is no greater than _Len (3.9). The member typedef
-   *  type shall be a POD type suitable for use as uninitialized
-   *  storage for any object whose size is at most _Len and whose
-   *  alignment is a divisor of _Align.
-  */
-  template<size_t _Len, size_t _Align =
-	   __alignof__(typename __aligned_storage_msa<_Len>::__type)>
-    struct aligned_storage
-    { 
-      union type
-      {
-	unsigned char __data[_Len];
-	struct __attribute__((__aligned__((_Align)))) { } __align; 
-      };
-    };
-
-
-  // Decay trait for arrays and functions, used for perfect forwarding
-  // in make_pair, make_tuple, etc.
-  template<typename _Up, 
-	   bool _IsArray = is_array<_Up>::value,
-	   bool _IsFunction = is_function<_Up>::value> 
-    struct __decay_selector;
-
-  // NB: DR 705.
-  template<typename _Up> 
-    struct __decay_selector<_Up, false, false>
-    { typedef typename remove_cv<_Up>::type __type; };
-
-  template<typename _Up> 
-    struct __decay_selector<_Up, true, false>
-    { typedef typename remove_extent<_Up>::type* __type; };
-
-  template<typename _Up> 
-    struct __decay_selector<_Up, false, true>
-    { typedef typename add_pointer<_Up>::type __type; };
-
-  /// decay
-  template<typename _Tp> 
-    class decay 
-    { 
-      typedef typename remove_reference<_Tp>::type __remove_type;
-
-    public:
-      typedef typename __decay_selector<__remove_type>::__type type;
-    };
-
-  template<typename _Tp>
-    class reference_wrapper;
-
-  // Helper which adds a reference to a type when given a reference_wrapper
-  template<typename _Tp>
-    struct __strip_reference_wrapper
-    {
-      typedef _Tp __type;
-    };
-
-  template<typename _Tp>
-    struct __strip_reference_wrapper<reference_wrapper<_Tp> >
-    {
-      typedef _Tp& __type;
-    };
-
-  template<typename _Tp>
-    struct __strip_reference_wrapper<const reference_wrapper<_Tp> >
-    {
-      typedef _Tp& __type;
-    };
-
-  template<typename _Tp>
-    struct __decay_and_strip
-    {
-      typedef typename __strip_reference_wrapper<
-	typename decay<_Tp>::type>::__type __type;
-    };
-
-
-  // Define a nested type if some predicate holds.
-  // Primary template.
-  /// enable_if
-  template<bool, typename _Tp = void>
-    struct enable_if 
-    { };
-
-  // Partial specialization for true.
-  template<typename _Tp>
-    struct enable_if<true, _Tp>
-    { typedef _Tp type; };
-
-
-  // A conditional expression, but for types. If true, first, if false, second.
-  // Primary template.
-  /// conditional
-  template<bool _Cond, typename _Iftrue, typename _Iffalse>
-    struct conditional
-    { typedef _Iftrue type; };
-
-  // Partial specialization for false.
-  template<typename _Iftrue, typename _Iffalse>
-    struct conditional<false, _Iftrue, _Iffalse>
-    { typedef _Iffalse type; };
-
-
-  /// common_type
-  template<typename... _Tp>
-    struct common_type;
-
-  template<typename _Tp>
-    struct common_type<_Tp>
-    { typedef _Tp type; };
-
-  template<typename _Tp, typename _Up>
-    struct common_type<_Tp, _Up>
-    { typedef decltype(true ? declval<_Tp>() : declval<_Up>()) type; };
-
-  template<typename _Tp, typename _Up, typename... _Vp>
-    struct common_type<_Tp, _Up, _Vp...>
-    {
-      typedef typename
-        common_type<typename common_type<_Tp, _Up>::type, _Vp...>::type type;
-    };
-
-  /// underlying_type
-  template<typename _Tp>
-    struct underlying_type
-    {
-      typedef __underlying_type(_Tp) type;
-    };
-
-  /// declval
-  template<typename _Tp>
-    struct __declval_protector
-    {
-      static const bool __stop = false;
-      static typename add_rvalue_reference<_Tp>::type __delegate();
-    };
-
-  template<typename _Tp>
-    inline typename add_rvalue_reference<_Tp>::type
-    declval() noexcept
-    {
-      static_assert(__declval_protector<_Tp>::__stop,
-		    "declval() must not be used!");
-      return __declval_protector<_Tp>::__delegate();
-    }
-
-  /// result_of
-  template<typename _Signature>
-    class result_of;
-
-  template<typename _MemPtr, typename _Arg>
-    struct _Result_of_memobj;
-
-  template<typename _Res, typename _Class, typename _Arg>
-    struct _Result_of_memobj<_Res _Class::*, _Arg>
-    {
-    private:
-      typedef _Res _Class::* _Func;
-
-      template<typename _Tp>
-	static _Tp _S_get(const _Class&);
-      template<typename _Tp>
-	static decltype(*declval<_Tp>()) _S_get(...);
-        
-    public:
-      typedef
-        decltype(_S_get<_Arg>(declval<_Arg>()).*declval<_Func>())
-        __type;
-    };
-
-  template<typename _MemPtr, typename _Arg, typename... _ArgTypes>
-    struct _Result_of_memfun;
-
-  template<typename _Res, typename _Class, typename _Arg, typename... _Args>
-    struct _Result_of_memfun<_Res _Class::*, _Arg, _Args...>
-    {
-    private:
-      typedef _Res _Class::* _Func;
-
-      template<typename _Tp>
-	static _Tp _S_get(const _Class&);
-      template<typename _Tp>
-	static decltype(*declval<_Tp>()) _S_get(...);
-        
-    public:
-      typedef
-        decltype((_S_get<_Arg>(declval<_Arg>()).*declval<_Func>())
-            (declval<_Args>()...) )
-        __type;
-    };
-
-  template<bool, bool, typename _Functor, typename... _ArgTypes>
-    struct _Result_of_impl;
-
-  template<typename _Functor, typename... _ArgTypes>
-    struct _Result_of_impl<false, false, _Functor, _ArgTypes...>
-    {
-      typedef
-        decltype( declval<_Functor>()(declval<_ArgTypes>()...) )
-        __type;
-    };
-
-  template<typename _MemPtr, typename _Arg>
-    struct _Result_of_impl<true, false, _MemPtr, _Arg>
-    : _Result_of_memobj<typename remove_reference<_MemPtr>::type, _Arg>
-    {
-      typedef typename _Result_of_memobj<
-	typename remove_reference<_MemPtr>::type, _Arg>::__type
-	__type;
-    };
-
-  template<typename _MemPtr, typename _Arg, typename... _ArgTypes>
-    struct _Result_of_impl<false, true, _MemPtr, _Arg, _ArgTypes...>
-    : _Result_of_memfun<typename remove_reference<_MemPtr>::type, _Arg,
-                        _ArgTypes...>
-    {
-      typedef typename _Result_of_memfun<
-	typename remove_reference<_MemPtr>::type, _Arg, _ArgTypes...>::__type
-	__type;
-    };
-
-  template<typename _Functor, typename... _ArgTypes>
-    struct result_of<_Functor(_ArgTypes...)>
-    : _Result_of_impl<is_member_object_pointer<
-                        typename remove_reference<_Functor>::type >::value,
-                      is_member_function_pointer<
-			typename remove_reference<_Functor>::type >::value,
-		      _Functor, _ArgTypes...>
-    {
-      typedef typename _Result_of_impl<
-	is_member_object_pointer<
-	  typename remove_reference<_Functor>::type >::value,
-        is_member_function_pointer<
-	  typename remove_reference<_Functor>::type >::value,
-       	_Functor, _ArgTypes...>::__type
-	type;
-    };
-
-  /**
-   *  Use SFINAE to determine if the type _Tp has a publicly-accessible
-   *  member type _NTYPE.
-   */
-#define _GLIBCXX_HAS_NESTED_TYPE(_NTYPE)                         \
-  template<typename _Tp>                                         \
-    class __has_##_NTYPE##_helper                                \
-    : __sfinae_types                                             \
-    {                                                            \
-      template<typename _Up>                                     \
-        struct _Wrap_type                                        \
-	{ };                                                     \
-                                                                 \
-      template<typename _Up>                                     \
-        static __one __test(_Wrap_type<typename _Up::_NTYPE>*);  \
-                                                                 \
-      template<typename _Up>                                     \
-        static __two __test(...);                                \
-                                                                 \
-    public:                                                      \
-      static constexpr bool value = sizeof(__test<_Tp>(0)) == 1; \
-    };                                                           \
-                                                                 \
-  template<typename _Tp>                                         \
-    struct __has_##_NTYPE                                        \
-    : integral_constant<bool, __has_##_NTYPE##_helper            \
-			<typename remove_cv<_Tp>::type>::value>  \
-    { };
-
-  // @} group metaprogramming
-// _GLIBCXX_END_NAMESPACE_VERSION
-} // namespace
-
-// #endif  // __GXX_EXPERIMENTAL_CXX0X__
-
-#endif  // _GLIBCXX_TYPE_TRAITS