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Edit: /usr/include/boost/tuple/detail/tuple_basic.hpp (32448B)

//  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/type_traits/integral_constant.hpp>
#include <boost/utility/swap.hpp>

#include <boost/detail/workaround.hpp> // needed for BOOST_WORKAROUND

#if defined(BOOST_GCC) && (BOOST_GCC >= 40700)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-local-typedefs"
#endif

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;

template<int N>
struct drop_front {
    template<class Tuple>
    struct apply {
        typedef BOOST_DEDUCED_TYPENAME drop_front<N-1>::BOOST_NESTED_TEMPLATE
            apply<Tuple> next;
        typedef BOOST_DEDUCED_TYPENAME next::type::tail_type type;
        static const type& call(const Tuple& tup) {
            return next::call(tup).tail;
        }
    };
};

template<>
struct drop_front<0> {
    template<class Tuple>
    struct apply {
        typedef Tuple type;
        static const type& call(const Tuple& tup) {
            return tup;
        }
    };
};

} // 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
{
  typedef BOOST_DEDUCED_TYPENAME detail::drop_front<N>::BOOST_NESTED_TEMPLATE
      apply<T>::type::head_type type;
};

template<int N, class T>
struct element<N, const T>
{
private:
  typedef BOOST_DEDUCED_TYPENAME detail::drop_front<N>::BOOST_NESTED_TEMPLATE
      apply<T>::type::head_type unqualified_type;
public:
#if BOOST_WORKAROUND(BOOST_BORLANDC,<0x600)
  typedef const unqualified_type type;
#else
  typedef BOOST_DEDUCED_TYPENAME boost::add_const<unqualified_type>::type type;
#endif
};
#else // def BOOST_NO_CV_SPECIALIZATIONS

namespace detail {

template<int N, class T, bool IsConst>
struct element_impl
{
  typedef BOOST_DEDUCED_TYPENAME detail::drop_front<N>::BOOST_NESTED_TEMPLATE
      apply<T>::type::head_type type;
};

template<int N, class T>
struct element_impl<N, T, true /* IsConst */>
{
  typedef BOOST_DEDUCED_TYPENAME detail::drop_front<N>::BOOST_NESTED_TEMPLATE
      apply<T>::type::head_type unqualified_type;
  typedef const unqualified_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) {
  typedef BOOST_DEDUCED_TYPENAME detail::drop_front<N>::BOOST_NESTED_TEMPLATE
      apply<cons<HT, TT> > impl;
  typedef BOOST_DEDUCED_TYPENAME impl::type cons_element;
  return const_cast<cons_element&>(impl::call(c)).head;
}

// 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) {
  typedef BOOST_DEDUCED_TYPENAME detail::drop_front<N>::BOOST_NESTED_TEMPLATE
      apply<cons<HT, TT> > impl;
  return impl::call(c).head;
}

// -- 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())
      {}

cons( const cons& u ) : head(u.head), tail(u.tail) {}

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 () {}

cons( const cons& u ) : head(u.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() {
    return boost::tuples::get<N>(*this);
  }

template <int N>
  typename access_traits<
             typename element<N, self_type>::type
           >::const_type
  get() const {
    return boost::tuples::get<N>(*this);
  }

};

// templates for finding out the length of the tuple -------------------

template<class T>
struct length: boost::integral_constant<int, 1 + length<typename T::tail_type>::value>
{
};

template<>
struct length<tuple<> >: boost::integral_constant<int, 0>
{
};

template<>
struct length<tuple<> const>: boost::integral_constant<int, 0>
{
};

template<>
struct length<null_type>: boost::integral_constant<int, 0>
{
};

template<>
struct length<null_type const>: boost::integral_constant<int, 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() {}

explicit 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,
        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;
typedef void (detail::swallow_assign::*ignore_t)();
struct swallow_assign {
  swallow_assign(ignore_t(*)(ignore_t)) {}
  template<typename T>
  swallow_assign const& operator=(const T&) const {
    return *this;
  }
};

} // namespace detail

// "ignore" allows tuple positions to be ignored when using "tie".
inline detail::ignore_t ignore(detail::ignore_t) { return 0; }

// ---------------------------------------------------------------------------
// 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;
};

template<>
struct make_tuple_traits<detail::ignore_t(detail::ignore_t)> {
  typedef detail::swallow_assign 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);
}

namespace detail {

template<class T>
struct tie_traits {
  typedef T& type;
};

template<>
struct tie_traits<ignore_t(ignore_t)> {
  typedef swallow_assign type;
};

template<>
struct tie_traits<void> {
  typedef null_type type;
};

template <
  class T0 = void, class T1 = void, class T2 = void,
  class T3 = void, class T4 = void, class T5 = void,
  class T6 = void, class T7 = void, class T8 = void,
  class T9 = void
>
struct tie_mapper {
  typedef
    tuple<typename tie_traits<T0>::type,
          typename tie_traits<T1>::type,
          typename tie_traits<T2>::type,
          typename tie_traits<T3>::type,
          typename tie_traits<T4>::type,
          typename tie_traits<T5>::type,
          typename tie_traits<T6>::type,
          typename tie_traits<T7>::type,
          typename tie_traits<T8>::type,
          typename tie_traits<T9>::type> type;
};

}

// Tie function templates -------------------------------------------------
template<class T0>
inline typename detail::tie_mapper<T0>::type
tie(T0& t0) {
  typedef typename detail::tie_mapper<T0>::type t;
  return t(t0);
}

template<class T0, class T1>
inline typename detail::tie_mapper<T0, T1>::type
tie(T0& t0, T1& t1) {
  typedef typename detail::tie_mapper<T0, T1>::type t;
  return t(t0, t1);
}

template<class T0, class T1, class T2>
inline typename detail::tie_mapper<T0, T1, T2>::type
tie(T0& t0, T1& t1, T2& t2) {
  typedef typename detail::tie_mapper<T0, T1, T2>::type t;
  return t(t0, t1, t2);
}

template<class T0, class T1, class T2, class T3>
inline typename detail::tie_mapper<T0, T1, T2, T3>::type
tie(T0& t0, T1& t1, T2& t2, T3& t3) {
  typedef typename detail::tie_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::tie_mapper<T0, T1, T2, T3, T4>::type
tie(T0& t0, T1& t1, T2& t2, T3& t3,
                  T4& t4) {
  typedef typename detail::tie_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::tie_mapper<T0, T1, T2, T3, T4, T5>::type
tie(T0& t0, T1& t1, T2& t2, T3& t3,
                  T4& t4, T5& t5) {
  typedef typename detail::tie_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::tie_mapper<T0, T1, T2, T3, T4, T5, T6>::type
tie(T0& t0, T1& t1, T2& t2, T3& t3,
                  T4& t4, T5& t5, T6& t6) {
  typedef typename detail::tie_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::tie_mapper<T0, T1, T2, T3, T4, T5, T6, T7>::type
tie(T0& t0, T1& t1, T2& t2, T3& t3,
                  T4& t4, T5& t5, T6& t6, T7& t7) {
  typedef typename detail::tie_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::tie_mapper
  <T0, T1, T2, T3, T4, T5, T6, T7, T8>::type
tie(T0& t0, T1& t1, T2& t2, T3& t3,
                  T4& t4, T5& t5, T6& t6, T7& t7,
                  T8& t8) {
  typedef typename detail::tie_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::tie_mapper
  <T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::type
tie(T0& t0, T1& t1, T2& t2, T3& t3,
                  T4& t4, T5& t5, T6& t6, T7& t7,
                  T8& t8, T9& t9) {
  typedef typename detail::tie_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);
}

template <class T0, class T1, class T2, class T3, class T4,
          class T5, class T6, class T7, class T8, class T9>
void swap(tuple<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>& lhs,
          tuple<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>& rhs);
inline void swap(null_type&, null_type&) {}
template<class HH>
inline void swap(cons<HH, null_type>& lhs, cons<HH, null_type>& rhs) {
  ::boost::swap(lhs.head, rhs.head);
}
template<class HH, class TT>
inline void swap(cons<HH, TT>& lhs, cons<HH, TT>& rhs) {
  ::boost::swap(lhs.head, rhs.head);
  ::boost::tuples::swap(lhs.tail, rhs.tail);
}
template <class T0, class T1, class T2, class T3, class T4,
          class T5, class T6, class T7, class T8, class T9>
inline void swap(tuple<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>& lhs,
          tuple<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>& rhs) {
  typedef tuple<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9> tuple_type;
  typedef typename tuple_type::inherited base;
  ::boost::tuples::swap(static_cast<base&>(lhs), static_cast<base&>(rhs));
}

} // end of namespace tuples
} // end of namespace boost

#if defined(BOOST_GCC) && (BOOST_GCC >= 40700)
#pragma GCC diagnostic pop
#endif

#endif // BOOST_TUPLE_BASIC_HPP

// 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 // needed for the assignment from pair to tuple #include #include #include #include #include // needed for BOOST_WORKAROUND #if defined(BOOST_GCC) && (BOOST_GCC >= 40700) #pragma GCC diagnostic push #pragma GCC diagnostic ignored "-Wunused-local-typedefs" #endif 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 struct IF { typedef Then RET; }; template struct IF { typedef Else RET; }; } // end detail // - cons forward declaration ----------------------------------------------- template 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 struct length; namespace detail { // -- generate error template, referencing to non-existing members of this // template is used to produce compilation errors intentionally template class generate_error; template struct drop_front { template struct apply { typedef BOOST_DEDUCED_TYPENAME drop_front::BOOST_NESTED_TEMPLATE apply next; typedef BOOST_DEDUCED_TYPENAME next::type::tail_type type; static const type& call(const Tuple& tup) { return next::call(tup).tail; } }; }; template<> struct drop_front<0> { template struct apply { typedef Tuple type; static const type& call(const Tuple& tup) { return tup; } }; }; } // end of namespace detail // -cons type accessors ---------------------------------------- // typename tuples::element::type gets the type of the // Nth element ot T, first element is at index 0 // ------------------------------------------------------- #ifndef BOOST_NO_CV_SPECIALIZATIONS template struct element { typedef BOOST_DEDUCED_TYPENAME detail::drop_front::BOOST_NESTED_TEMPLATE apply::type::head_type type; }; template struct element { private: typedef BOOST_DEDUCED_TYPENAME detail::drop_front::BOOST_NESTED_TEMPLATE apply::type::head_type unqualified_type; public: #if BOOST_WORKAROUND(BOOST_BORLANDC,<0x600) typedef const unqualified_type type; #else typedef BOOST_DEDUCED_TYPENAME boost::add_const::type type; #endif }; #else // def BOOST_NO_CV_SPECIALIZATIONS namespace detail { template struct element_impl { typedef BOOST_DEDUCED_TYPENAME detail::drop_front::BOOST_NESTED_TEMPLATE apply::type::head_type type; }; template struct element_impl { typedef BOOST_DEDUCED_TYPENAME detail::drop_front::BOOST_NESTED_TEMPLATE apply::type::head_type unqualified_type; typedef const unqualified_type type; }; } // end of namespace detail template struct element: public detail::element_impl::value> { }; #endif // -get function templates ----------------------------------------------- // Usage: get(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 struct access_traits { typedef const T& const_type; typedef T& non_const_type; typedef const typename boost::remove_cv::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 struct access_traits { 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 inline typename access_traits< typename element >::type >::non_const_type get(cons& c) { typedef BOOST_DEDUCED_TYPENAME detail::drop_front::BOOST_NESTED_TEMPLATE apply > impl; typedef BOOST_DEDUCED_TYPENAME impl::type cons_element; return const_cast(impl::call(c)).head; } // 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 inline typename access_traits< typename element >::type >::const_type get(const cons& c) { typedef BOOST_DEDUCED_TYPENAME detail::drop_front::BOOST_NESTED_TEMPLATE apply > impl; return impl::call(c).head; } // -- 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 some_type; // ok // but: some_type x; // fails template class non_storeable_type { non_storeable_type(); }; template struct wrap_non_storeable_type { typedef typename IF< ::boost::is_function::value, non_storeable_type, T >::RET type; }; template <> struct wrap_non_storeable_type { typedef non_storeable_type type; }; } // detail template struct cons { typedef HT head_type; typedef TT tail_type; typedef typename detail::wrap_non_storeable_type::type stored_head_type; stored_head_type head; tail_type tail; typename access_traits::non_const_type get_head() { return head; } typename access_traits::non_const_type get_tail() { return tail; } typename access_traits::const_type get_head() const { return head; } typename access_traits::const_type get_tail() const { return tail; } cons() : head(), tail() {} // cons() : head(detail::default_arg::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::parameter_type h, const tail_type& t) : head (h), tail(t) {} template 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 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()) {} cons( const cons& u ) : head(u.head), tail(u.tail) {} template cons( const cons& u ) : head(u.head), tail(u.tail) {} template cons& operator=( const cons& 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 cons& operator=( const std::pair& u ) { BOOST_STATIC_ASSERT(length::value == 2); // check length = 2 head = u.first; tail.head = u.second; return *this; } // get member functions (non-const and const) template typename access_traits< typename element >::type >::non_const_type get() { return boost::tuples::get(*this); // delegate to non-member get } template typename access_traits< typename element >::type >::const_type get() const { return boost::tuples::get(*this); // delegate to non-member get } }; template struct cons { typedef HT head_type; typedef null_type tail_type; typedef cons self_type; typedef typename detail::wrap_non_storeable_type::type stored_head_type; stored_head_type head; typename access_traits::non_const_type get_head() { return head; } null_type get_tail() { return null_type(); } typename access_traits::const_type get_head() const { return head; } const null_type get_tail() const { return null_type(); } // cons() : head(detail::default_arg::f()) {} cons() : head() {} cons(typename access_traits::parameter_type h, const null_type& = null_type()) : head (h) {} template 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 () {} cons( const cons& u ) : head(u.head) {} template cons( const cons& u ) : head(u.head) {} template cons& operator=(const cons& 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 typename access_traits< typename element::type >::non_const_type get() { return boost::tuples::get(*this); } template typename access_traits< typename element::type >::const_type get() const { return boost::tuples::get(*this); } }; // templates for finding out the length of the tuple ------------------- template struct length: boost::integral_constant::value> { }; template<> struct length >: boost::integral_constant { }; template<> struct length const>: boost::integral_constant { }; template<> struct length: boost::integral_constant { }; template<> struct length: boost::integral_constant { }; namespace detail { // Tuple to cons mapper -------------------------------------------------- template struct map_tuple_to_cons { typedef cons::type > type; }; // The empty tuple is a null_type template <> struct map_tuple_to_cons { typedef null_type type; }; } // end detail // ------------------------------------------------------------------- // -- tuple ------------------------------------------------------ template class tuple : public detail::map_tuple_to_cons::type { public: typedef typename detail::map_tuple_to_cons::type inherited; typedef typename inherited::head_type head_type; typedef typename inherited::tail_type tail_type; // access_traits::parameter_type takes non-reference types as const T& tuple() {} explicit tuple(typename access_traits::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::parameter_type t0, typename access_traits::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::parameter_type t0, typename access_traits::parameter_type t1, typename access_traits::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::parameter_type t0, typename access_traits::parameter_type t1, typename access_traits::parameter_type t2, typename access_traits::parameter_type t3) : inherited(t0, t1, t2, t3, detail::cnull(), detail::cnull(), detail::cnull(), detail::cnull(), detail::cnull(), detail::cnull()) {} tuple(typename access_traits::parameter_type t0, typename access_traits::parameter_type t1, typename access_traits::parameter_type t2, typename access_traits::parameter_type t3, typename access_traits::parameter_type t4) : inherited(t0, t1, t2, t3, t4, detail::cnull(), detail::cnull(), detail::cnull(), detail::cnull(), detail::cnull()) {} tuple(typename access_traits::parameter_type t0, typename access_traits::parameter_type t1, typename access_traits::parameter_type t2, typename access_traits::parameter_type t3, typename access_traits::parameter_type t4, typename access_traits::parameter_type t5) : inherited(t0, t1, t2, t3, t4, t5, detail::cnull(), detail::cnull(), detail::cnull(), detail::cnull()) {} tuple(typename access_traits::parameter_type t0, typename access_traits::parameter_type t1, typename access_traits::parameter_type t2, typename access_traits::parameter_type t3, typename access_traits::parameter_type t4, typename access_traits::parameter_type t5, typename access_traits::parameter_type t6) : inherited(t0, t1, t2, t3, t4, t5, t6, detail::cnull(), detail::cnull(), detail::cnull()) {} tuple(typename access_traits::parameter_type t0, typename access_traits::parameter_type t1, typename access_traits::parameter_type t2, typename access_traits::parameter_type t3, typename access_traits::parameter_type t4, typename access_traits::parameter_type t5, typename access_traits::parameter_type t6, typename access_traits::parameter_type t7) : inherited(t0, t1, t2, t3, t4, t5, t6, t7, detail::cnull(), detail::cnull()) {} tuple(typename access_traits::parameter_type t0, typename access_traits::parameter_type t1, typename access_traits::parameter_type t2, typename access_traits::parameter_type t3, typename access_traits::parameter_type t4, typename access_traits::parameter_type t5, typename access_traits::parameter_type t6, typename access_traits::parameter_type t7, typename access_traits::parameter_type t8) : inherited(t0, t1, t2, t3, t4, t5, t6, t7, t8, detail::cnull()) {} tuple(typename access_traits::parameter_type t0, typename access_traits::parameter_type t1, typename access_traits::parameter_type t2, typename access_traits::parameter_type t3, typename access_traits::parameter_type t4, typename access_traits::parameter_type t5, typename access_traits::parameter_type t6, typename access_traits::parameter_type t7, typename access_traits::parameter_type t8, typename access_traits::parameter_type t9) : inherited(t0, t1, t2, t3, t4, t5, t6, t7, t8, t9) {} template tuple(const cons& p) : inherited(p) {} template tuple& operator=(const cons& k) { inherited::operator=(k); return *this; } template tuple& operator=(const std::pair& k) { BOOST_STATIC_ASSERT(length::value == 2);// check_length = 2 this->head = k.first; this->tail.head = k.second; return *this; } }; // The empty tuple template <> class tuple : public null_type { public: typedef null_type inherited; }; // Swallows any assignment (by Doug Gregor) namespace detail { struct swallow_assign; typedef void (detail::swallow_assign::*ignore_t)(); struct swallow_assign { swallow_assign(ignore_t(*)(ignore_t)) {} template swallow_assign const& operator=(const T&) const { return *this; } }; } // namespace detail // "ignore" allows tuple positions to be ignored when using "tie". inline detail::ignore_t ignore(detail::ignore_t) { return 0; } // --------------------------------------------------------------------------- // 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 foo(const T& t) : make_tuple_traits::type // from template foo(T& t) : make_tuple_traits::type // Conversions: // T -> T, // references -> compile_time_error // reference_wrapper -> T& // const reference_wrapper -> T& // array -> const ref array template struct make_tuple_traits { typedef T type; // commented away, see below (JJ) // typedef typename IF< // boost::is_function::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 struct make_tuple_traits { typedef typename detail::generate_error:: 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 struct make_tuple_traits { typedef const T (&type)[n]; }; template struct make_tuple_traits { typedef const T (&type)[n]; }; template struct make_tuple_traits { typedef const volatile T (&type)[n]; }; template struct make_tuple_traits { typedef const volatile T (&type)[n]; }; template struct make_tuple_traits >{ typedef T& type; }; template struct make_tuple_traits >{ typedef T& type; }; template<> struct make_tuple_traits { typedef detail::swallow_assign 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::type, typename make_tuple_traits::type, typename make_tuple_traits::type, typename make_tuple_traits::type, typename make_tuple_traits::type, typename make_tuple_traits::type, typename make_tuple_traits::type, typename make_tuple_traits::type, typename make_tuple_traits::type, typename make_tuple_traits::type> type; }; } // end detail // -make_tuple function templates ----------------------------------- inline tuple<> make_tuple() { return tuple<>(); } template inline typename detail::make_tuple_mapper::type make_tuple(const T0& t0) { typedef typename detail::make_tuple_mapper::type t; return t(t0); } template inline typename detail::make_tuple_mapper::type make_tuple(const T0& t0, const T1& t1) { typedef typename detail::make_tuple_mapper::type t; return t(t0, t1); } template inline typename detail::make_tuple_mapper::type make_tuple(const T0& t0, const T1& t1, const T2& t2) { typedef typename detail::make_tuple_mapper::type t; return t(t0, t1, t2); } template inline typename detail::make_tuple_mapper::type make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3) { typedef typename detail::make_tuple_mapper::type t; return t(t0, t1, t2, t3); } template inline typename detail::make_tuple_mapper::type make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3, const T4& t4) { typedef typename detail::make_tuple_mapper::type t; return t(t0, t1, t2, t3, t4); } template inline typename detail::make_tuple_mapper::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::type t; return t(t0, t1, t2, t3, t4, t5); } template inline typename detail::make_tuple_mapper::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 ::type t; return t(t0, t1, t2, t3, t4, t5, t6); } template inline typename detail::make_tuple_mapper::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 ::type t; return t(t0, t1, t2, t3, t4, t5, t6, t7); } template inline typename detail::make_tuple_mapper ::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 ::type t; return t(t0, t1, t2, t3, t4, t5, t6, t7, t8); } template inline typename detail::make_tuple_mapper ::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 ::type t; return t(t0, t1, t2, t3, t4, t5, t6, t7, t8, t9); } namespace detail { template struct tie_traits { typedef T& type; }; template<> struct tie_traits { typedef swallow_assign type; }; template<> struct tie_traits { typedef null_type type; }; template < class T0 = void, class T1 = void, class T2 = void, class T3 = void, class T4 = void, class T5 = void, class T6 = void, class T7 = void, class T8 = void, class T9 = void > struct tie_mapper { typedef tuple::type, typename tie_traits::type, typename tie_traits::type, typename tie_traits::type, typename tie_traits::type, typename tie_traits::type, typename tie_traits::type, typename tie_traits::type, typename tie_traits::type, typename tie_traits::type> type; }; } // Tie function templates ------------------------------------------------- template inline typename detail::tie_mapper::type tie(T0& t0) { typedef typename detail::tie_mapper::type t; return t(t0); } template inline typename detail::tie_mapper::type tie(T0& t0, T1& t1) { typedef typename detail::tie_mapper::type t; return t(t0, t1); } template inline typename detail::tie_mapper::type tie(T0& t0, T1& t1, T2& t2) { typedef typename detail::tie_mapper::type t; return t(t0, t1, t2); } template inline typename detail::tie_mapper::type tie(T0& t0, T1& t1, T2& t2, T3& t3) { typedef typename detail::tie_mapper::type t; return t(t0, t1, t2, t3); } template inline typename detail::tie_mapper::type tie(T0& t0, T1& t1, T2& t2, T3& t3, T4& t4) { typedef typename detail::tie_mapper::type t; return t(t0, t1, t2, t3, t4); } template inline typename detail::tie_mapper::type tie(T0& t0, T1& t1, T2& t2, T3& t3, T4& t4, T5& t5) { typedef typename detail::tie_mapper::type t; return t(t0, t1, t2, t3, t4, t5); } template inline typename detail::tie_mapper::type tie(T0& t0, T1& t1, T2& t2, T3& t3, T4& t4, T5& t5, T6& t6) { typedef typename detail::tie_mapper ::type t; return t(t0, t1, t2, t3, t4, t5, t6); } template inline typename detail::tie_mapper::type tie(T0& t0, T1& t1, T2& t2, T3& t3, T4& t4, T5& t5, T6& t6, T7& t7) { typedef typename detail::tie_mapper ::type t; return t(t0, t1, t2, t3, t4, t5, t6, t7); } template inline typename detail::tie_mapper ::type tie(T0& t0, T1& t1, T2& t2, T3& t3, T4& t4, T5& t5, T6& t6, T7& t7, T8& t8) { typedef typename detail::tie_mapper ::type t; return t(t0, t1, t2, t3, t4, t5, t6, t7, t8); } template inline typename detail::tie_mapper ::type tie(T0& t0, T1& t1, T2& t2, T3& t3, T4& t4, T5& t5, T6& t6, T7& t7, T8& t8, T9& t9) { typedef typename detail::tie_mapper ::type t; return t(t0, t1, t2, t3, t4, t5, t6, t7, t8, t9); } template void swap(tuple& lhs, tuple& rhs); inline void swap(null_type&, null_type&) {} template inline void swap(cons& lhs, cons& rhs) { ::boost::swap(lhs.head, rhs.head); } template inline void swap(cons& lhs, cons& rhs) { ::boost::swap(lhs.head, rhs.head); ::boost::tuples::swap(lhs.tail, rhs.tail); } template inline void swap(tuple& lhs, tuple& rhs) { typedef tuple tuple_type; typedef typename tuple_type::inherited base; ::boost::tuples::swap(static_cast(lhs), static_cast(rhs)); } } // end of namespace tuples } // end of namespace boost #if defined(BOOST_GCC) && (BOOST_GCC >= 40700) #pragma GCC diagnostic pop #endif #endif // BOOST_TUPLE_BASIC_HPP