Add gmock into our dependencies.

third_party/boost/boost/tuple/detail/tuple_basic.hpp

Index: third_party/boost/boost/tuple/detail/tuple_basic.hpp
diff --git a/third_party/boost/boost/tuple/detail/tuple_basic.hpp b/third_party/boost/boost/tuple/detail/tuple_basic.hpp
new file mode 100644
index 0000000000000000000000000000000000000000..ba59441f274e45834a74e38fd5b0753c7dc1837b
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+++ b/third_party/boost/boost/tuple/detail/tuple_basic.hpp
@@ -0,0 +1,944 @@
+//  tuple_basic.hpp -----------------------------------------------------
+
+// Copyright (C) 1999, 2000 Jaakko Jarvi (jaakko.jarvi@cs.utu.fi)
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+// For more information, see http://www.boost.org
+
+// Outside help:
+// This and that, Gary Powell.
+// Fixed return types for get_head/get_tail
+// ( and other bugs ) per suggestion of Jens Maurer
+// simplified element type accessors + bug fix  (Jeremy Siek)
+// Several changes/additions according to suggestions by Douglas Gregor,
+// William Kempf, Vesa Karvonen, John Max Skaller, Ed Brey, Beman Dawes,
+// David Abrahams.
+
+// Revision history:
+// 2002 05 01 Hugo Duncan: Fix for Borland after Jaakko's previous changes
+// 2002 04 18 Jaakko: tuple element types can be void or plain function
+//                    types, as long as no object is created.
+//                    Tuple objects can no hold even noncopyable types
+//                    such as arrays.
+// 2001 10 22 John Maddock
+//      Fixes for Borland C++
+// 2001 08 30 David Abrahams
+//      Added default constructor for cons<>.
+// -----------------------------------------------------------------
+
+#ifndef BOOST_TUPLE_BASIC_HPP
+#define BOOST_TUPLE_BASIC_HPP
+
+
+#include <utility> // needed for the assignment from pair to tuple
+
+#include "boost/type_traits/cv_traits.hpp"
+#include "boost/type_traits/function_traits.hpp"
+
+#include "boost/detail/workaround.hpp" // needed for BOOST_WORKAROUND
+
+namespace boost {
+namespace tuples {
+
+// -- null_type --------------------------------------------------------
+struct null_type {};
+
+// a helper function to provide a const null_type type temporary
+namespace detail {
+  inline const null_type cnull() { return null_type(); }
+
+
+// -- if construct ------------------------------------------------
+// Proposed by Krzysztof Czarnecki and Ulrich Eisenecker
+
+template <bool If, class Then, class Else> struct IF { typedef Then RET; };
+
+template <class Then, class Else> struct IF<false, Then, Else> {
+  typedef Else RET;
+};
+
+} // end detail
+
+// - cons forward declaration -----------------------------------------------
+template <class HT, class TT> struct cons;
+
+
+// - tuple forward declaration -----------------------------------------------
+template <
+  class T0 = null_type, class T1 = null_type, class T2 = null_type,
+  class T3 = null_type, class T4 = null_type, class T5 = null_type,
+  class T6 = null_type, class T7 = null_type, class T8 = null_type,
+  class T9 = null_type>
+class tuple;
+
+// tuple_length forward declaration
+template<class T> struct length;
+
+
+
+namespace detail {
+
+// -- generate error template, referencing to non-existing members of this
+// template is used to produce compilation errors intentionally
+template<class T>
+class generate_error;
+
+// - cons getters --------------------------------------------------------
+// called: get_class<N>::get<RETURN_TYPE>(aTuple)
+
+template< int N >
+struct get_class {
+  template<class RET, class HT, class TT >
+  inline static RET get(const cons<HT, TT>& t)
+  {
+#if BOOST_WORKAROUND(__IBMCPP__,==600)
+    // vacpp 6.0 is not very consistent regarding the member template keyword
+    // Here it generates an error when the template keyword is used.
+    return get_class<N-1>::get<RET>(t.tail);
+#else
+    return get_class<N-1>::BOOST_NESTED_TEMPLATE get<RET>(t.tail);
+#endif
+  }
+  template<class RET, class HT, class TT >
+  inline static RET get(cons<HT, TT>& t)
+  {
+#if BOOST_WORKAROUND(__IBMCPP__,==600)
+    return get_class<N-1>::get<RET>(t.tail);
+#else
+    return get_class<N-1>::BOOST_NESTED_TEMPLATE get<RET>(t.tail);
+#endif
+  }
+};
+
+template<>
+struct get_class<0> {
+  template<class RET, class HT, class TT>
+  inline static RET get(const cons<HT, TT>& t)
+  {
+    return t.head;
+  }
+  template<class RET, class HT, class TT>
+  inline static RET get(cons<HT, TT>& t)
+  {
+    return t.head;
+  }
+};
+
+} // end of namespace detail
+
+
+// -cons type accessors ----------------------------------------
+// typename tuples::element<N,T>::type gets the type of the
+// Nth element ot T, first element is at index 0
+// -------------------------------------------------------
+
+#ifndef BOOST_NO_CV_SPECIALIZATIONS
+
+template<int N, class T>
+struct element
+{
+private:
+  typedef typename T::tail_type Next;
+public:
+  typedef typename element<N-1, Next>::type type;
+};
+template<class T>
+struct element<0,T>
+{
+  typedef typename T::head_type type;
+};
+
+template<int N, class T>
+struct element<N, const T>
+{
+private:
+  typedef typename T::tail_type Next;
+  typedef typename element<N-1, Next>::type unqualified_type;
+public:
+#if BOOST_WORKAROUND(__BORLANDC__,<0x600)
+  typedef const unqualified_type type;
+#else
+  typedef typename boost::add_const<unqualified_type>::type type;
+#endif
+
+};
+template<class T>
+struct element<0,const T>
+{
+#if BOOST_WORKAROUND(__BORLANDC__,<0x600)
+  typedef const typename T::head_type type;
+#else
+  typedef typename boost::add_const<typename T::head_type>::type type;
+#endif
+};
+
+#else // def BOOST_NO_CV_SPECIALIZATIONS
+
+namespace detail {
+
+template<int N, class T, bool IsConst>
+struct element_impl
+{
+private:
+  typedef typename T::tail_type Next;
+public:
+  typedef typename element_impl<N-1, Next, IsConst>::type type;
+};
+
+template<int N, class T>
+struct element_impl<N, T, true /* IsConst */>
+{
+private:
+  typedef typename T::tail_type Next;
+public:
+  typedef const typename element_impl<N-1, Next, true>::type type;
+};
+
+template<class T>
+struct element_impl<0, T, false /* IsConst */>
+{
+  typedef typename T::head_type type;
+};
+
+template<class T>
+struct element_impl<0, T, true /* IsConst */>
+{
+  typedef const typename T::head_type type;
+};
+
+} // end of namespace detail
+
+
+template<int N, class T>
+struct element: 
+  public detail::element_impl<N, T, ::boost::is_const<T>::value>
+{
+};
+
+#endif
+
+
+// -get function templates -----------------------------------------------
+// Usage: get<N>(aTuple)
+
+// -- some traits classes for get functions
+
+// access traits lifted from detail namespace to be part of the interface,
+// (Joel de Guzman's suggestion). Rationale: get functions are part of the
+// interface, so should the way to express their return types be.
+
+template <class T> struct access_traits {
+  typedef const T& const_type;
+  typedef T& non_const_type;
+
+  typedef const typename boost::remove_cv<T>::type& parameter_type;
+
+// used as the tuple constructors parameter types
+// Rationale: non-reference tuple element types can be cv-qualified.
+// It should be possible to initialize such types with temporaries,
+// and when binding temporaries to references, the reference must
+// be non-volatile and const. 8.5.3. (5)
+};
+
+template <class T> struct access_traits<T&> {
+
+  typedef T& const_type;
+  typedef T& non_const_type;
+
+  typedef T& parameter_type;
+};
+
+// get function for non-const cons-lists, returns a reference to the element
+
+template<int N, class HT, class TT>
+inline typename access_traits<
+                  typename element<N, cons<HT, TT> >::type
+                >::non_const_type
+get(cons<HT, TT>& c BOOST_APPEND_EXPLICIT_TEMPLATE_NON_TYPE(int, N)) {
+#if BOOST_WORKAROUND(__IBMCPP__,==600 )
+  return detail::get_class<N>::
+#else
+  return detail::get_class<N>::BOOST_NESTED_TEMPLATE
+#endif
+         get<
+           typename access_traits<
+             typename element<N, cons<HT, TT> >::type
+           >::non_const_type,
+           HT,TT
+         >(c);
+}
+
+// get function for const cons-lists, returns a const reference to
+// the element. If the element is a reference, returns the reference
+// as such (that is, can return a non-const reference)
+template<int N, class HT, class TT>
+inline typename access_traits<
+                  typename element<N, cons<HT, TT> >::type
+                >::const_type
+get(const cons<HT, TT>& c BOOST_APPEND_EXPLICIT_TEMPLATE_NON_TYPE(int, N)) {
+#if BOOST_WORKAROUND(__IBMCPP__,==600)
+  return detail::get_class<N>::
+#else
+  return detail::get_class<N>::BOOST_NESTED_TEMPLATE
+#endif
+         get<
+           typename access_traits<
+             typename element<N, cons<HT, TT> >::type
+           >::const_type,
+           HT,TT
+         >(c);
+}
+
+// -- the cons template  --------------------------------------------------
+namespace detail {
+
+//  These helper templates wrap void types and plain function types.
+//  The reationale is to allow one to write tuple types with those types
+//  as elements, even though it is not possible to instantiate such object.
+//  E.g: typedef tuple<void> some_type; // ok
+//  but: some_type x; // fails
+
+template <class T> class non_storeable_type {
+  non_storeable_type();
+};
+
+template <class T> struct wrap_non_storeable_type {
+  typedef typename IF<
+    ::boost::is_function<T>::value, non_storeable_type<T>, T
+  >::RET type;
+};
+template <> struct wrap_non_storeable_type<void> {
+  typedef non_storeable_type<void> type;
+};
+
+} // detail
+
+template <class HT, class TT>
+struct cons {
+
+  typedef HT head_type;
+  typedef TT tail_type;
+
+  typedef typename
+    detail::wrap_non_storeable_type<head_type>::type stored_head_type;
+
+  stored_head_type head;
+  tail_type tail;
+
+  typename access_traits<stored_head_type>::non_const_type
+  get_head() { return head; }
+
+  typename access_traits<tail_type>::non_const_type
+  get_tail() { return tail; }
+
+  typename access_traits<stored_head_type>::const_type
+  get_head() const { return head; }
+
+  typename access_traits<tail_type>::const_type
+  get_tail() const { return tail; }
+
+  cons() : head(), tail() {}
+  //  cons() : head(detail::default_arg<HT>::f()), tail() {}
+
+  // the argument for head is not strictly needed, but it prevents
+  // array type elements. This is good, since array type elements
+  // cannot be supported properly in any case (no assignment,
+  // copy works only if the tails are exactly the same type, ...)
+
+  cons(typename access_traits<stored_head_type>::parameter_type h,
+       const tail_type& t)
+    : head (h), tail(t) {}
+
+  template <class T1, class T2, class T3, class T4, class T5,
+            class T6, class T7, class T8, class T9, class T10>
+  cons( T1& t1, T2& t2, T3& t3, T4& t4, T5& t5,
+        T6& t6, T7& t7, T8& t8, T9& t9, T10& t10 )
+    : head (t1),
+      tail (t2, t3, t4, t5, t6, t7, t8, t9, t10, detail::cnull())
+      {}
+
+  template <class T2, class T3, class T4, class T5,
+            class T6, class T7, class T8, class T9, class T10>
+  cons( const null_type& /*t1*/, T2& t2, T3& t3, T4& t4, T5& t5,
+        T6& t6, T7& t7, T8& t8, T9& t9, T10& t10 )
+    : head (),
+      tail (t2, t3, t4, t5, t6, t7, t8, t9, t10, detail::cnull())
+      {}
+
+
+  template <class HT2, class TT2>
+  cons( const cons<HT2, TT2>& u ) : head(u.head), tail(u.tail) {}
+
+  template <class HT2, class TT2>
+  cons& operator=( const cons<HT2, TT2>& u ) {
+    head=u.head; tail=u.tail; return *this;
+  }
+
+  // must define assignment operator explicitly, implicit version is
+  // illformed if HT is a reference (12.8. (12))
+  cons& operator=(const cons& u) {
+    head = u.head; tail = u.tail;  return *this;
+  }
+
+  template <class T1, class T2>
+  cons& operator=( const std::pair<T1, T2>& u ) {
+    BOOST_STATIC_ASSERT(length<cons>::value == 2); // check length = 2
+    head = u.first; tail.head = u.second; return *this;
+  }
+
+  // get member functions (non-const and const)
+  template <int N>
+  typename access_traits<
+             typename element<N, cons<HT, TT> >::type
+           >::non_const_type
+  get() {
+    return boost::tuples::get<N>(*this); // delegate to non-member get
+  }
+
+  template <int N>
+  typename access_traits<
+             typename element<N, cons<HT, TT> >::type
+           >::const_type
+  get() const {
+    return boost::tuples::get<N>(*this); // delegate to non-member get
+  }
+};
+
+template <class HT>
+struct cons<HT, null_type> {
+
+  typedef HT head_type;
+  typedef null_type tail_type;
+  typedef cons<HT, null_type> self_type;
+
+  typedef typename
+    detail::wrap_non_storeable_type<head_type>::type stored_head_type;
+  stored_head_type head;
+
+  typename access_traits<stored_head_type>::non_const_type
+  get_head() { return head; }
+
+  null_type get_tail() { return null_type(); }
+
+  typename access_traits<stored_head_type>::const_type
+  get_head() const { return head; }
+
+  const null_type get_tail() const { return null_type(); }
+
+  //  cons() : head(detail::default_arg<HT>::f()) {}
+  cons() : head() {}
+
+  cons(typename access_traits<stored_head_type>::parameter_type h,
+       const null_type& = null_type())
+    : head (h) {}
+
+  template<class T1>
+  cons(T1& t1, const null_type&, const null_type&, const null_type&,
+       const null_type&, const null_type&, const null_type&,
+       const null_type&, const null_type&, const null_type&)
+  : head (t1) {}
+
+  cons(const null_type&,
+       const null_type&, const null_type&, const null_type&,
+       const null_type&, const null_type&, const null_type&,
+       const null_type&, const null_type&, const null_type&)
+  : head () {}
+
+  template <class HT2>
+  cons( const cons<HT2, null_type>& u ) : head(u.head) {}
+
+  template <class HT2>
+  cons& operator=(const cons<HT2, null_type>& u )
+  { head = u.head; return *this; }
+
+  // must define assignment operator explicitely, implicit version
+  // is illformed if HT is a reference
+  cons& operator=(const cons& u) { head = u.head; return *this; }
+
+  template <int N>
+  typename access_traits<
+             typename element<N, self_type>::type
+            >::non_const_type
+  get(BOOST_EXPLICIT_TEMPLATE_NON_TYPE(int, N)) {
+    return boost::tuples::get<N>(*this);
+  }
+
+  template <int N>
+  typename access_traits<
+             typename element<N, self_type>::type
+           >::const_type
+  get(BOOST_EXPLICIT_TEMPLATE_NON_TYPE(int, N)) const {
+    return boost::tuples::get<N>(*this);
+  }
+
+};
+
+// templates for finding out the length of the tuple -------------------
+
+template<class T>
+struct length  {
+  BOOST_STATIC_CONSTANT(int, value = 1 + length<typename T::tail_type>::value);
+};
+
+template<>
+struct length<tuple<> > {
+  BOOST_STATIC_CONSTANT(int, value = 0);
+};
+
+template<>
+struct length<null_type> {
+  BOOST_STATIC_CONSTANT(int, value = 0);
+};
+
+
+namespace detail {
+
+// Tuple to cons mapper --------------------------------------------------
+template <class T0, class T1, class T2, class T3, class T4,
+          class T5, class T6, class T7, class T8, class T9>
+struct map_tuple_to_cons
+{
+  typedef cons<T0,
+               typename map_tuple_to_cons<T1, T2, T3, T4, T5,
+                                          T6, T7, T8, T9, null_type>::type
+              > type;
+};
+
+// The empty tuple is a null_type
+template <>
+struct map_tuple_to_cons<null_type, null_type, null_type, null_type, null_type, null_type, null_type, null_type, null_type, null_type>
+{
+  typedef null_type type;
+};
+
+} // end detail
+
+// -------------------------------------------------------------------
+// -- tuple ------------------------------------------------------
+template <class T0, class T1, class T2, class T3, class T4,
+          class T5, class T6, class T7, class T8, class T9>
+
+class tuple :
+  public detail::map_tuple_to_cons<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::type
+{
+public:
+  typedef typename
+    detail::map_tuple_to_cons<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::type inherited;
+  typedef typename inherited::head_type head_type;
+  typedef typename inherited::tail_type tail_type;
+
+
+// access_traits<T>::parameter_type takes non-reference types as const T&
+  tuple() {}
+
+  tuple(typename access_traits<T0>::parameter_type t0)
+    : inherited(t0, detail::cnull(), detail::cnull(), detail::cnull(),
+                detail::cnull(), detail::cnull(), detail::cnull(),
+                detail::cnull(), detail::cnull(), detail::cnull()) {}
+
+  tuple(typename access_traits<T0>::parameter_type t0,
+        typename access_traits<T1>::parameter_type t1)
+    : inherited(t0, t1, detail::cnull(), detail::cnull(),
+                detail::cnull(), detail::cnull(), detail::cnull(),
+                detail::cnull(), detail::cnull(), detail::cnull()) {}
+
+  tuple(typename access_traits<T0>::parameter_type t0,
+        typename access_traits<T1>::parameter_type t1,
+        typename access_traits<T2>::parameter_type t2)
+    : inherited(t0, t1, t2, detail::cnull(), detail::cnull(),
+                detail::cnull(), detail::cnull(), detail::cnull(),
+                detail::cnull(), detail::cnull()) {}
+
+  tuple(typename access_traits<T0>::parameter_type t0,
+        typename access_traits<T1>::parameter_type t1,
+        typename access_traits<T2>::parameter_type t2,
+        typename access_traits<T3>::parameter_type t3)
+    : inherited(t0, t1, t2, t3, detail::cnull(), detail::cnull(),
+                detail::cnull(), detail::cnull(), detail::cnull(),
+                detail::cnull()) {}
+
+  tuple(typename access_traits<T0>::parameter_type t0,
+        typename access_traits<T1>::parameter_type t1,
+        typename access_traits<T2>::parameter_type t2,
+        typename access_traits<T3>::parameter_type t3,
+        typename access_traits<T4>::parameter_type t4)
+    : inherited(t0, t1, t2, t3, t4, detail::cnull(), detail::cnull(),
+                detail::cnull(), detail::cnull(), detail::cnull()) {}
+
+  tuple(typename access_traits<T0>::parameter_type t0,
+        typename access_traits<T1>::parameter_type t1,
+        typename access_traits<T2>::parameter_type t2,
+        typename access_traits<T3>::parameter_type t3,
+        typename access_traits<T4>::parameter_type t4,
+        typename access_traits<T5>::parameter_type t5)
+    : inherited(t0, t1, t2, t3, t4, t5, detail::cnull(), detail::cnull(),
+                detail::cnull(), detail::cnull()) {}
+
+  tuple(typename access_traits<T0>::parameter_type t0,
+        typename access_traits<T1>::parameter_type t1,
+        typename access_traits<T2>::parameter_type t2,
+        typename access_traits<T3>::parameter_type t3,
+        typename access_traits<T4>::parameter_type t4,
+        typename access_traits<T5>::parameter_type t5,
+        typename access_traits<T6>::parameter_type t6)
+    : inherited(t0, t1, t2, t3, t4, t5, t6, detail::cnull(),
+                detail::cnull(), detail::cnull()) {}
+
+  tuple(typename access_traits<T0>::parameter_type t0,
+        typename access_traits<T1>::parameter_type t1,
+        typename access_traits<T2>::parameter_type t2,
+        typename access_traits<T3>::parameter_type t3,
+        typename access_traits<T4>::parameter_type t4,
+        typename access_traits<T5>::parameter_type t5,
+        typename access_traits<T6>::parameter_type t6,
+        typename access_traits<T7>::parameter_type t7)
+    : inherited(t0, t1, t2, t3, t4, t5, t6, t7, detail::cnull(),
+                detail::cnull()) {}
+
+  tuple(typename access_traits<T0>::parameter_type t0,
+        typename access_traits<T1>::parameter_type t1,
+        typename access_traits<T2>::parameter_type t2,
+        typename access_traits<T3>::parameter_type t3,
+        typename access_traits<T4>::parameter_type t4,
+        typename access_traits<T5>::parameter_type t5,
+        typename access_traits<T6>::parameter_type t6,
+        typename access_traits<T7>::parameter_type t7,
+        typename access_traits<T8>::parameter_type t8)
+    : inherited(t0, t1, t2, t3, t4, t5, t6, t7, t8, detail::cnull()) {}
+
+  tuple(typename access_traits<T0>::parameter_type t0,
+        typename access_traits<T1>::parameter_type t1,
+        typename access_traits<T2>::parameter_type t2,
+        typename access_traits<T3>::parameter_type t3,
+        typename access_traits<T4>::parameter_type t4,
+        typename access_traits<T5>::parameter_type t5,
+        typename access_traits<T6>::parameter_type t6,
+        typename access_traits<T7>::parameter_type t7,
+        typename access_traits<T8>::parameter_type t8,
+        typename access_traits<T9>::parameter_type t9)
+    : inherited(t0, t1, t2, t3, t4, t5, t6, t7, t8, t9) {}
+
+
+  template<class U1, class U2>
+  tuple(const cons<U1, U2>& p) : inherited(p) {}
+
+  template <class U1, class U2>
+  tuple& operator=(const cons<U1, U2>& k) {
+    inherited::operator=(k);
+    return *this;
+  }
+
+  template <class U1, class U2>
+  tuple& operator=(const std::pair<U1, U2>& k) {
+    BOOST_STATIC_ASSERT(length<tuple>::value == 2);// check_length = 2
+    this->head = k.first;
+    this->tail.head = k.second;
+    return *this;
+  }
+
+};
+
+// The empty tuple
+template <>
+class tuple<null_type, null_type, null_type, null_type, null_type, null_type, null_type, null_type, null_type, null_type>  :
+  public null_type
+{
+public:
+  typedef null_type inherited;
+};
+
+
+// Swallows any assignment   (by Doug Gregor)
+namespace detail {
+
+struct swallow_assign {
+
+  template<typename T>
+  swallow_assign const& operator=(const T&) const {
+    return *this;
+  }
+};
+
+} // namespace detail
+
+// "ignore" allows tuple positions to be ignored when using "tie".
+detail::swallow_assign const ignore = detail::swallow_assign();
+
+// ---------------------------------------------------------------------------
+// The call_traits for make_tuple
+// Honours the reference_wrapper class.
+
+// Must be instantiated with plain or const plain types (not with references)
+
+// from template<class T> foo(const T& t) : make_tuple_traits<const T>::type
+// from template<class T> foo(T& t) : make_tuple_traits<T>::type
+
+// Conversions:
+// T -> T,
+// references -> compile_time_error
+// reference_wrapper<T> -> T&
+// const reference_wrapper<T> -> T&
+// array -> const ref array
+
+
+template<class T>
+struct make_tuple_traits {
+  typedef T type;
+
+  // commented away, see below  (JJ)
+  //  typedef typename IF<
+  //  boost::is_function<T>::value,
+  //  T&,
+  //  T>::RET type;
+
+};
+
+// The is_function test was there originally for plain function types,
+// which can't be stored as such (we must either store them as references or
+// pointers). Such a type could be formed if make_tuple was called with a
+// reference to a function.
+// But this would mean that a const qualified function type was formed in
+// the make_tuple function and hence make_tuple can't take a function
+// reference as a parameter, and thus T can't be a function type.
+// So is_function test was removed.
+// (14.8.3. says that type deduction fails if a cv-qualified function type
+// is created. (It only applies for the case of explicitly specifying template
+// args, though?)) (JJ)
+
+template<class T>
+struct make_tuple_traits<T&> {
+  typedef typename
+     detail::generate_error<T&>::
+       do_not_use_with_reference_type error;
+};
+
+// Arrays can't be stored as plain types; convert them to references.
+// All arrays are converted to const. This is because make_tuple takes its
+// parameters as const T& and thus the knowledge of the potential
+// non-constness of actual argument is lost.
+template<class T, int n>  struct make_tuple_traits <T[n]> {
+  typedef const T (&type)[n];
+};
+
+template<class T, int n>
+struct make_tuple_traits<const T[n]> {
+  typedef const T (&type)[n];
+};
+
+template<class T, int n>  struct make_tuple_traits<volatile T[n]> {
+  typedef const volatile T (&type)[n];
+};
+
+template<class T, int n>
+struct make_tuple_traits<const volatile T[n]> {
+  typedef const volatile T (&type)[n];
+};
+
+template<class T>
+struct make_tuple_traits<reference_wrapper<T> >{
+  typedef T& type;
+};
+
+template<class T>
+struct make_tuple_traits<const reference_wrapper<T> >{
+  typedef T& type;
+};
+
+
+
+
+namespace detail {
+
+// a helper traits to make the make_tuple functions shorter (Vesa Karvonen's
+// suggestion)
+template <
+  class T0 = null_type, class T1 = null_type, class T2 = null_type,
+  class T3 = null_type, class T4 = null_type, class T5 = null_type,
+  class T6 = null_type, class T7 = null_type, class T8 = null_type,
+  class T9 = null_type
+>
+struct make_tuple_mapper {
+  typedef
+    tuple<typename make_tuple_traits<T0>::type,
+          typename make_tuple_traits<T1>::type,
+          typename make_tuple_traits<T2>::type,
+          typename make_tuple_traits<T3>::type,
+          typename make_tuple_traits<T4>::type,
+          typename make_tuple_traits<T5>::type,
+          typename make_tuple_traits<T6>::type,
+          typename make_tuple_traits<T7>::type,
+          typename make_tuple_traits<T8>::type,
+          typename make_tuple_traits<T9>::type> type;
+};
+
+} // end detail
+
+// -make_tuple function templates -----------------------------------
+inline tuple<> make_tuple() {
+  return tuple<>();
+}
+
+template<class T0>
+inline typename detail::make_tuple_mapper<T0>::type
+make_tuple(const T0& t0) {
+  typedef typename detail::make_tuple_mapper<T0>::type t;
+  return t(t0);
+}
+
+template<class T0, class T1>
+inline typename detail::make_tuple_mapper<T0, T1>::type
+make_tuple(const T0& t0, const T1& t1) {
+  typedef typename detail::make_tuple_mapper<T0, T1>::type t;
+  return t(t0, t1);
+}
+
+template<class T0, class T1, class T2>
+inline typename detail::make_tuple_mapper<T0, T1, T2>::type
+make_tuple(const T0& t0, const T1& t1, const T2& t2) {
+  typedef typename detail::make_tuple_mapper<T0, T1, T2>::type t;
+  return t(t0, t1, t2);
+}
+
+template<class T0, class T1, class T2, class T3>
+inline typename detail::make_tuple_mapper<T0, T1, T2, T3>::type
+make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3) {
+  typedef typename detail::make_tuple_mapper<T0, T1, T2, T3>::type t;
+  return t(t0, t1, t2, t3);
+}
+
+template<class T0, class T1, class T2, class T3, class T4>
+inline typename detail::make_tuple_mapper<T0, T1, T2, T3, T4>::type
+make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3,
+                  const T4& t4) {
+  typedef typename detail::make_tuple_mapper<T0, T1, T2, T3, T4>::type t;
+  return t(t0, t1, t2, t3, t4);
+}
+
+template<class T0, class T1, class T2, class T3, class T4, class T5>
+inline typename detail::make_tuple_mapper<T0, T1, T2, T3, T4, T5>::type
+make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3,
+                  const T4& t4, const T5& t5) {
+  typedef typename detail::make_tuple_mapper<T0, T1, T2, T3, T4, T5>::type t;
+  return t(t0, t1, t2, t3, t4, t5);
+}
+
+template<class T0, class T1, class T2, class T3, class T4, class T5, class T6>
+inline typename detail::make_tuple_mapper<T0, T1, T2, T3, T4, T5, T6>::type
+make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3,
+                  const T4& t4, const T5& t5, const T6& t6) {
+  typedef typename detail::make_tuple_mapper
+           <T0, T1, T2, T3, T4, T5, T6>::type t;
+  return t(t0, t1, t2, t3, t4, t5, t6);
+}
+
+template<class T0, class T1, class T2, class T3, class T4, class T5, class T6,
+         class T7>
+inline typename detail::make_tuple_mapper<T0, T1, T2, T3, T4, T5, T6, T7>::type
+make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3,
+                  const T4& t4, const T5& t5, const T6& t6, const T7& t7) {
+  typedef typename detail::make_tuple_mapper
+           <T0, T1, T2, T3, T4, T5, T6, T7>::type t;
+  return t(t0, t1, t2, t3, t4, t5, t6, t7);
+}
+
+template<class T0, class T1, class T2, class T3, class T4, class T5, class T6,
+         class T7, class T8>
+inline typename detail::make_tuple_mapper
+  <T0, T1, T2, T3, T4, T5, T6, T7, T8>::type
+make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3,
+                  const T4& t4, const T5& t5, const T6& t6, const T7& t7,
+                  const T8& t8) {
+  typedef typename detail::make_tuple_mapper
+           <T0, T1, T2, T3, T4, T5, T6, T7, T8>::type t;
+  return t(t0, t1, t2, t3, t4, t5, t6, t7, t8);
+}
+
+template<class T0, class T1, class T2, class T3, class T4, class T5, class T6,
+         class T7, class T8, class T9>
+inline typename detail::make_tuple_mapper
+  <T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::type
+make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3,
+                  const T4& t4, const T5& t5, const T6& t6, const T7& t7,
+                  const T8& t8, const T9& t9) {
+  typedef typename detail::make_tuple_mapper
+           <T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::type t;
+  return t(t0, t1, t2, t3, t4, t5, t6, t7, t8, t9);
+}
+
+
+
+// Tie function templates -------------------------------------------------
+template<class T1>
+inline tuple<T1&> tie(T1& t1) {
+  return tuple<T1&> (t1);
+}
+
+template<class T1, class T2>
+inline tuple<T1&, T2&> tie(T1& t1, T2& t2) {
+  return tuple<T1&, T2&> (t1, t2);
+}
+
+template<class T1, class T2, class T3>
+inline tuple<T1&, T2&, T3&> tie(T1& t1, T2& t2, T3& t3) {
+  return tuple<T1&, T2&, T3&> (t1, t2, t3);
+}
+
+template<class T1, class T2, class T3, class T4>
+inline tuple<T1&, T2&, T3&, T4&> tie(T1& t1, T2& t2, T3& t3, T4& t4) {
+  return tuple<T1&, T2&, T3&, T4&> (t1, t2, t3, t4);
+}
+
+template<class T1, class T2, class T3, class T4, class T5>
+inline tuple<T1&, T2&, T3&, T4&, T5&>
+tie(T1& t1, T2& t2, T3& t3, T4& t4, T5& t5) {
+  return tuple<T1&, T2&, T3&, T4&, T5&> (t1, t2, t3, t4, t5);
+}
+
+template<class T1, class T2, class T3, class T4, class T5, class T6>
+inline tuple<T1&, T2&, T3&, T4&, T5&, T6&>
+tie(T1& t1, T2& t2, T3& t3, T4& t4, T5& t5, T6& t6) {
+  return tuple<T1&, T2&, T3&, T4&, T5&, T6&> (t1, t2, t3, t4, t5, t6);
+}
+
+template<class T1, class T2, class T3, class T4, class T5, class T6, class T7>
+inline tuple<T1&, T2&, T3&, T4&, T5&, T6&, T7&>
+tie(T1& t1, T2& t2, T3& t3, T4& t4, T5& t5, T6& t6, T7& t7) {
+  return tuple<T1&, T2&, T3&, T4&, T5&, T6&, T7&> (t1, t2, t3, t4, t5, t6, t7);
+}
+
+template<class T1, class T2, class T3, class T4, class T5, class T6, class T7,
+         class T8>
+inline tuple<T1&, T2&, T3&, T4&, T5&, T6&, T7&, T8&>
+tie(T1& t1, T2& t2, T3& t3, T4& t4, T5& t5, T6& t6, T7& t7, T8& t8) {
+  return tuple<T1&, T2&, T3&, T4&, T5&, T6&, T7&, T8&>
+           (t1, t2, t3, t4, t5, t6, t7, t8);
+}
+
+template<class T1, class T2, class T3, class T4, class T5, class T6, class T7,
+         class T8, class T9>
+inline tuple<T1&, T2&, T3&, T4&, T5&, T6&, T7&, T8&, T9&>
+tie(T1& t1, T2& t2, T3& t3, T4& t4, T5& t5, T6& t6, T7& t7, T8& t8,
+           T9& t9) {
+  return tuple<T1&, T2&, T3&, T4&, T5&, T6&, T7&, T8&, T9&>
+            (t1, t2, t3, t4, t5, t6, t7, t8, t9);
+}
+
+template<class T1, class T2, class T3, class T4, class T5, class T6, class T7,
+         class T8, class T9, class T10>
+inline tuple<T1&, T2&, T3&, T4&, T5&, T6&, T7&, T8&, T9&, T10&>
+tie(T1& t1, T2& t2, T3& t3, T4& t4, T5& t5, T6& t6, T7& t7, T8& t8,
+           T9& t9, T10& t10) {
+  return tuple<T1&, T2&, T3&, T4&, T5&, T6&, T7&, T8&, T9&, T10&>
+           (t1, t2, t3, t4, t5, t6, t7, t8, t9, t10);
+}
+
+} // end of namespace tuples
+} // end of namespace boost
+
+
+#endif // BOOST_TUPLE_BASIC_HPP
+
+