1 // tuple_basic.hpp -----------------------------------------------------
3 // Copyright (C) 1999, 2000 Jaakko Jarvi (jaakko.jarvi@cs.utu.fi)
5 // Distributed under the Boost Software License, Version 1.0. (See
6 // accompanying file LICENSE_1_0.txt or copy at
7 // http://www.boost.org/LICENSE_1_0.txt)
9 // For more information, see http://www.boost.org
12 // This and that, Gary Powell.
13 // Fixed return types for get_head/get_tail
14 // ( and other bugs ) per suggestion of Jens Maurer
15 // simplified element type accessors + bug fix (Jeremy Siek)
16 // Several changes/additions according to suggestions by Douglas Gregor,
17 // William Kempf, Vesa Karvonen, John Max Skaller, Ed Brey, Beman Dawes,
21 // 2002 05 01 Hugo Duncan: Fix for Borland after Jaakko's previous changes
22 // 2002 04 18 Jaakko: tuple element types can be void or plain function
23 // types, as long as no object is created.
24 // Tuple objects can no hold even noncopyable types
26 // 2001 10 22 John Maddock
27 // Fixes for Borland C++
28 // 2001 08 30 David Abrahams
29 // Added default constructor for cons<>.
30 // -----------------------------------------------------------------
32 #ifndef BOOST_TUPLE_BASIC_HPP
33 #define BOOST_TUPLE_BASIC_HPP
36 #include <utility> // needed for the assignment from pair to tuple
38 #include "boost/type_traits/cv_traits.hpp"
39 #include "boost/type_traits/function_traits.hpp"
41 #include "boost/detail/workaround.hpp" // needed for BOOST_WORKAROUND
46 // -- null_type --------------------------------------------------------
49 // a helper function to provide a const null_type type temporary
51 inline const null_type cnull() { return null_type(); }
54 // -- if construct ------------------------------------------------
55 // Proposed by Krzysztof Czarnecki and Ulrich Eisenecker
57 template <bool If, class Then, class Else> struct IF { typedef Then RET; };
59 template <class Then, class Else> struct IF<false, Then, Else> {
65 // - cons forward declaration -----------------------------------------------
66 template <class HT, class TT> struct cons;
69 // - tuple forward declaration -----------------------------------------------
71 class T0 = null_type, class T1 = null_type, class T2 = null_type,
72 class T3 = null_type, class T4 = null_type, class T5 = null_type,
73 class T6 = null_type, class T7 = null_type, class T8 = null_type,
77 // tuple_length forward declaration
78 template<class T> struct length;
84 // -- generate error template, referencing to non-existing members of this
85 // template is used to produce compilation errors intentionally
89 // - cons getters --------------------------------------------------------
90 // called: get_class<N>::get<RETURN_TYPE>(aTuple)
94 template<class RET, class HT, class TT >
95 inline static RET get(const cons<HT, TT>& t)
97 #if BOOST_WORKAROUND(__IBMCPP__,==600)
98 // vacpp 6.0 is not very consistent regarding the member template keyword
99 // Here it generates an error when the template keyword is used.
100 return get_class<N-1>::get<RET>(t.tail);
102 return get_class<N-1>::BOOST_NESTED_TEMPLATE get<RET>(t.tail);
105 template<class RET, class HT, class TT >
106 inline static RET get(cons<HT, TT>& t)
108 #if BOOST_WORKAROUND(__IBMCPP__,==600)
109 return get_class<N-1>::get<RET>(t.tail);
111 return get_class<N-1>::BOOST_NESTED_TEMPLATE get<RET>(t.tail);
117 struct get_class<0> {
118 template<class RET, class HT, class TT>
119 inline static RET get(const cons<HT, TT>& t)
123 template<class RET, class HT, class TT>
124 inline static RET get(cons<HT, TT>& t)
130 } // end of namespace detail
133 // -cons type accessors ----------------------------------------
134 // typename tuples::element<N,T>::type gets the type of the
135 // Nth element ot T, first element is at index 0
136 // -------------------------------------------------------
138 #ifndef BOOST_NO_CV_SPECIALIZATIONS
140 template<int N, class T>
144 typedef typename T::tail_type Next;
146 typedef typename element<N-1, Next>::type type;
151 typedef typename T::head_type type;
154 template<int N, class T>
155 struct element<N, const T>
158 typedef typename T::tail_type Next;
159 typedef typename element<N-1, Next>::type unqualified_type;
161 #if BOOST_WORKAROUND(__BORLANDC__,<0x600)
162 typedef const unqualified_type type;
164 typedef typename boost::add_const<unqualified_type>::type type;
169 struct element<0,const T>
171 #if BOOST_WORKAROUND(__BORLANDC__,<0x600)
172 typedef const typename T::head_type type;
174 typedef typename boost::add_const<typename T::head_type>::type type;
178 #else // def BOOST_NO_CV_SPECIALIZATIONS
182 template<int N, class T, bool IsConst>
186 typedef typename T::tail_type Next;
188 typedef typename element_impl<N-1, Next, IsConst>::type type;
191 template<int N, class T>
192 struct element_impl<N, T, true /* IsConst */>
195 typedef typename T::tail_type Next;
197 typedef const typename element_impl<N-1, Next, true>::type type;
201 struct element_impl<0, T, false /* IsConst */>
203 typedef typename T::head_type type;
207 struct element_impl<0, T, true /* IsConst */>
209 typedef const typename T::head_type type;
212 } // end of namespace detail
215 template<int N, class T>
217 public detail::element_impl<N, T, ::boost::is_const<T>::value>
224 // -get function templates -----------------------------------------------
225 // Usage: get<N>(aTuple)
227 // -- some traits classes for get functions
229 // access traits lifted from detail namespace to be part of the interface,
230 // (Joel de Guzman's suggestion). Rationale: get functions are part of the
231 // interface, so should the way to express their return types be.
233 template <class T> struct access_traits {
234 typedef const T& const_type;
235 typedef T& non_const_type;
237 typedef const typename boost::remove_cv<T>::type& parameter_type;
239 // used as the tuple constructors parameter types
240 // Rationale: non-reference tuple element types can be cv-qualified.
241 // It should be possible to initialize such types with temporaries,
242 // and when binding temporaries to references, the reference must
243 // be non-volatile and const. 8.5.3. (5)
246 template <class T> struct access_traits<T&> {
248 typedef T& const_type;
249 typedef T& non_const_type;
251 typedef T& parameter_type;
254 // get function for non-const cons-lists, returns a reference to the element
256 template<int N, class HT, class TT>
257 inline typename access_traits<
258 typename element<N, cons<HT, TT> >::type
260 get(cons<HT, TT>& c BOOST_APPEND_EXPLICIT_TEMPLATE_NON_TYPE(int, N)) {
261 #if BOOST_WORKAROUND(__IBMCPP__,==600 )
262 return detail::get_class<N>::
264 return detail::get_class<N>::BOOST_NESTED_TEMPLATE
267 typename access_traits<
268 typename element<N, cons<HT, TT> >::type
274 // get function for const cons-lists, returns a const reference to
275 // the element. If the element is a reference, returns the reference
276 // as such (that is, can return a non-const reference)
277 template<int N, class HT, class TT>
278 inline typename access_traits<
279 typename element<N, cons<HT, TT> >::type
281 get(const cons<HT, TT>& c BOOST_APPEND_EXPLICIT_TEMPLATE_NON_TYPE(int, N)) {
282 #if BOOST_WORKAROUND(__IBMCPP__,==600)
283 return detail::get_class<N>::
285 return detail::get_class<N>::BOOST_NESTED_TEMPLATE
288 typename access_traits<
289 typename element<N, cons<HT, TT> >::type
295 // -- the cons template --------------------------------------------------
298 // These helper templates wrap void types and plain function types.
299 // The reationale is to allow one to write tuple types with those types
300 // as elements, even though it is not possible to instantiate such object.
301 // E.g: typedef tuple<void> some_type; // ok
302 // but: some_type x; // fails
304 template <class T> class non_storeable_type {
305 non_storeable_type();
308 template <class T> struct wrap_non_storeable_type {
310 ::boost::is_function<T>::value, non_storeable_type<T>, T
313 template <> struct wrap_non_storeable_type<void> {
314 typedef non_storeable_type<void> type;
319 template <class HT, class TT>
322 typedef HT head_type;
323 typedef TT tail_type;
326 detail::wrap_non_storeable_type<head_type>::type stored_head_type;
328 stored_head_type head;
331 typename access_traits<stored_head_type>::non_const_type
332 get_head() { return head; }
334 typename access_traits<tail_type>::non_const_type
335 get_tail() { return tail; }
337 typename access_traits<stored_head_type>::const_type
338 get_head() const { return head; }
340 typename access_traits<tail_type>::const_type
341 get_tail() const { return tail; }
343 cons() : head(), tail() {}
344 // cons() : head(detail::default_arg<HT>::f()), tail() {}
346 // the argument for head is not strictly needed, but it prevents
347 // array type elements. This is good, since array type elements
348 // cannot be supported properly in any case (no assignment,
349 // copy works only if the tails are exactly the same type, ...)
351 cons(typename access_traits<stored_head_type>::parameter_type h,
353 : head (h), tail(t) {}
355 template <class T1, class T2, class T3, class T4, class T5,
356 class T6, class T7, class T8, class T9, class T10>
357 cons( T1& t1, T2& t2, T3& t3, T4& t4, T5& t5,
358 T6& t6, T7& t7, T8& t8, T9& t9, T10& t10 )
360 tail (t2, t3, t4, t5, t6, t7, t8, t9, t10, detail::cnull())
363 template <class T2, class T3, class T4, class T5,
364 class T6, class T7, class T8, class T9, class T10>
365 cons( const null_type& /*t1*/, T2& t2, T3& t3, T4& t4, T5& t5,
366 T6& t6, T7& t7, T8& t8, T9& t9, T10& t10 )
368 tail (t2, t3, t4, t5, t6, t7, t8, t9, t10, detail::cnull())
372 template <class HT2, class TT2>
373 cons( const cons<HT2, TT2>& u ) : head(u.head), tail(u.tail) {}
375 template <class HT2, class TT2>
376 cons& operator=( const cons<HT2, TT2>& u ) {
377 head=u.head; tail=u.tail; return *this;
380 // must define assignment operator explicitly, implicit version is
381 // illformed if HT is a reference (12.8. (12))
382 cons& operator=(const cons& u) {
383 head = u.head; tail = u.tail; return *this;
386 template <class T1, class T2>
387 cons& operator=( const std::pair<T1, T2>& u ) {
388 BOOST_STATIC_ASSERT(length<cons>::value == 2); // check length = 2
389 head = u.first; tail.head = u.second; return *this;
392 // get member functions (non-const and const)
394 typename access_traits<
395 typename element<N, cons<HT, TT> >::type
398 return boost::tuples::get<N>(*this); // delegate to non-member get
402 typename access_traits<
403 typename element<N, cons<HT, TT> >::type
406 return boost::tuples::get<N>(*this); // delegate to non-member get
411 struct cons<HT, null_type> {
413 typedef HT head_type;
414 typedef null_type tail_type;
415 typedef cons<HT, null_type> self_type;
418 detail::wrap_non_storeable_type<head_type>::type stored_head_type;
419 stored_head_type head;
421 typename access_traits<stored_head_type>::non_const_type
422 get_head() { return head; }
424 null_type get_tail() { return null_type(); }
426 typename access_traits<stored_head_type>::const_type
427 get_head() const { return head; }
429 const null_type get_tail() const { return null_type(); }
431 // cons() : head(detail::default_arg<HT>::f()) {}
434 cons(typename access_traits<stored_head_type>::parameter_type h,
435 const null_type& = null_type())
439 cons(T1& t1, const null_type&, const null_type&, const null_type&,
440 const null_type&, const null_type&, const null_type&,
441 const null_type&, const null_type&, const null_type&)
444 cons(const null_type&,
445 const null_type&, const null_type&, const null_type&,
446 const null_type&, const null_type&, const null_type&,
447 const null_type&, const null_type&, const null_type&)
451 cons( const cons<HT2, null_type>& u ) : head(u.head) {}
454 cons& operator=(const cons<HT2, null_type>& u )
455 { head = u.head; return *this; }
457 // must define assignment operator explicitely, implicit version
458 // is illformed if HT is a reference
459 cons& operator=(const cons& u) { head = u.head; return *this; }
462 typename access_traits<
463 typename element<N, self_type>::type
465 get(BOOST_EXPLICIT_TEMPLATE_NON_TYPE(int, N)) {
466 return boost::tuples::get<N>(*this);
470 typename access_traits<
471 typename element<N, self_type>::type
473 get(BOOST_EXPLICIT_TEMPLATE_NON_TYPE(int, N)) const {
474 return boost::tuples::get<N>(*this);
479 // templates for finding out the length of the tuple -------------------
483 BOOST_STATIC_CONSTANT(int, value = 1 + length<typename T::tail_type>::value);
487 struct length<tuple<> > {
488 BOOST_STATIC_CONSTANT(int, value = 0);
492 struct length<null_type> {
493 BOOST_STATIC_CONSTANT(int, value = 0);
499 // Tuple to cons mapper --------------------------------------------------
500 template <class T0, class T1, class T2, class T3, class T4,
501 class T5, class T6, class T7, class T8, class T9>
502 struct map_tuple_to_cons
505 typename map_tuple_to_cons<T1, T2, T3, T4, T5,
506 T6, T7, T8, T9, null_type>::type
510 // The empty tuple is a null_type
512 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>
514 typedef null_type type;
519 // -------------------------------------------------------------------
520 // -- tuple ------------------------------------------------------
521 template <class T0, class T1, class T2, class T3, class T4,
522 class T5, class T6, class T7, class T8, class T9>
525 public detail::map_tuple_to_cons<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::type
529 detail::map_tuple_to_cons<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::type inherited;
530 typedef typename inherited::head_type head_type;
531 typedef typename inherited::tail_type tail_type;
534 // access_traits<T>::parameter_type takes non-reference types as const T&
537 tuple(typename access_traits<T0>::parameter_type t0)
538 : inherited(t0, detail::cnull(), detail::cnull(), detail::cnull(),
539 detail::cnull(), detail::cnull(), detail::cnull(),
540 detail::cnull(), detail::cnull(), detail::cnull()) {}
542 tuple(typename access_traits<T0>::parameter_type t0,
543 typename access_traits<T1>::parameter_type t1)
544 : inherited(t0, t1, detail::cnull(), detail::cnull(),
545 detail::cnull(), detail::cnull(), detail::cnull(),
546 detail::cnull(), detail::cnull(), detail::cnull()) {}
548 tuple(typename access_traits<T0>::parameter_type t0,
549 typename access_traits<T1>::parameter_type t1,
550 typename access_traits<T2>::parameter_type t2)
551 : inherited(t0, t1, t2, detail::cnull(), detail::cnull(),
552 detail::cnull(), detail::cnull(), detail::cnull(),
553 detail::cnull(), detail::cnull()) {}
555 tuple(typename access_traits<T0>::parameter_type t0,
556 typename access_traits<T1>::parameter_type t1,
557 typename access_traits<T2>::parameter_type t2,
558 typename access_traits<T3>::parameter_type t3)
559 : inherited(t0, t1, t2, t3, detail::cnull(), detail::cnull(),
560 detail::cnull(), detail::cnull(), detail::cnull(),
563 tuple(typename access_traits<T0>::parameter_type t0,
564 typename access_traits<T1>::parameter_type t1,
565 typename access_traits<T2>::parameter_type t2,
566 typename access_traits<T3>::parameter_type t3,
567 typename access_traits<T4>::parameter_type t4)
568 : inherited(t0, t1, t2, t3, t4, detail::cnull(), detail::cnull(),
569 detail::cnull(), detail::cnull(), detail::cnull()) {}
571 tuple(typename access_traits<T0>::parameter_type t0,
572 typename access_traits<T1>::parameter_type t1,
573 typename access_traits<T2>::parameter_type t2,
574 typename access_traits<T3>::parameter_type t3,
575 typename access_traits<T4>::parameter_type t4,
576 typename access_traits<T5>::parameter_type t5)
577 : inherited(t0, t1, t2, t3, t4, t5, detail::cnull(), detail::cnull(),
578 detail::cnull(), detail::cnull()) {}
580 tuple(typename access_traits<T0>::parameter_type t0,
581 typename access_traits<T1>::parameter_type t1,
582 typename access_traits<T2>::parameter_type t2,
583 typename access_traits<T3>::parameter_type t3,
584 typename access_traits<T4>::parameter_type t4,
585 typename access_traits<T5>::parameter_type t5,
586 typename access_traits<T6>::parameter_type t6)
587 : inherited(t0, t1, t2, t3, t4, t5, t6, detail::cnull(),
588 detail::cnull(), detail::cnull()) {}
590 tuple(typename access_traits<T0>::parameter_type t0,
591 typename access_traits<T1>::parameter_type t1,
592 typename access_traits<T2>::parameter_type t2,
593 typename access_traits<T3>::parameter_type t3,
594 typename access_traits<T4>::parameter_type t4,
595 typename access_traits<T5>::parameter_type t5,
596 typename access_traits<T6>::parameter_type t6,
597 typename access_traits<T7>::parameter_type t7)
598 : inherited(t0, t1, t2, t3, t4, t5, t6, t7, detail::cnull(),
601 tuple(typename access_traits<T0>::parameter_type t0,
602 typename access_traits<T1>::parameter_type t1,
603 typename access_traits<T2>::parameter_type t2,
604 typename access_traits<T3>::parameter_type t3,
605 typename access_traits<T4>::parameter_type t4,
606 typename access_traits<T5>::parameter_type t5,
607 typename access_traits<T6>::parameter_type t6,
608 typename access_traits<T7>::parameter_type t7,
609 typename access_traits<T8>::parameter_type t8)
610 : inherited(t0, t1, t2, t3, t4, t5, t6, t7, t8, detail::cnull()) {}
612 tuple(typename access_traits<T0>::parameter_type t0,
613 typename access_traits<T1>::parameter_type t1,
614 typename access_traits<T2>::parameter_type t2,
615 typename access_traits<T3>::parameter_type t3,
616 typename access_traits<T4>::parameter_type t4,
617 typename access_traits<T5>::parameter_type t5,
618 typename access_traits<T6>::parameter_type t6,
619 typename access_traits<T7>::parameter_type t7,
620 typename access_traits<T8>::parameter_type t8,
621 typename access_traits<T9>::parameter_type t9)
622 : inherited(t0, t1, t2, t3, t4, t5, t6, t7, t8, t9) {}
625 template<class U1, class U2>
626 tuple(const cons<U1, U2>& p) : inherited(p) {}
628 template <class U1, class U2>
629 tuple& operator=(const cons<U1, U2>& k) {
630 inherited::operator=(k);
634 template <class U1, class U2>
635 tuple& operator=(const std::pair<U1, U2>& k) {
636 BOOST_STATIC_ASSERT(length<tuple>::value == 2);// check_length = 2
637 this->head = k.first;
638 this->tail.head = k.second;
646 class tuple<null_type, null_type, null_type, null_type, null_type, null_type, null_type, null_type, null_type, null_type> :
650 typedef null_type inherited;
654 // Swallows any assignment (by Doug Gregor)
657 struct swallow_assign {
660 swallow_assign const& operator=(const T&) const {
665 } // namespace detail
667 // "ignore" allows tuple positions to be ignored when using "tie".
668 detail::swallow_assign const ignore = detail::swallow_assign();
670 // ---------------------------------------------------------------------------
671 // The call_traits for make_tuple
672 // Honours the reference_wrapper class.
674 // Must be instantiated with plain or const plain types (not with references)
676 // from template<class T> foo(const T& t) : make_tuple_traits<const T>::type
677 // from template<class T> foo(T& t) : make_tuple_traits<T>::type
681 // references -> compile_time_error
682 // reference_wrapper<T> -> T&
683 // const reference_wrapper<T> -> T&
684 // array -> const ref array
688 struct make_tuple_traits {
691 // commented away, see below (JJ)
692 // typedef typename IF<
693 // boost::is_function<T>::value,
699 // The is_function test was there originally for plain function types,
700 // which can't be stored as such (we must either store them as references or
701 // pointers). Such a type could be formed if make_tuple was called with a
702 // reference to a function.
703 // But this would mean that a const qualified function type was formed in
704 // the make_tuple function and hence make_tuple can't take a function
705 // reference as a parameter, and thus T can't be a function type.
706 // So is_function test was removed.
707 // (14.8.3. says that type deduction fails if a cv-qualified function type
708 // is created. (It only applies for the case of explicitly specifying template
709 // args, though?)) (JJ)
712 struct make_tuple_traits<T&> {
714 detail::generate_error<T&>::
715 do_not_use_with_reference_type error;
718 // Arrays can't be stored as plain types; convert them to references.
719 // All arrays are converted to const. This is because make_tuple takes its
720 // parameters as const T& and thus the knowledge of the potential
721 // non-constness of actual argument is lost.
722 template<class T, int n> struct make_tuple_traits <T[n]> {
723 typedef const T (&type)[n];
726 template<class T, int n>
727 struct make_tuple_traits<const T[n]> {
728 typedef const T (&type)[n];
731 template<class T, int n> struct make_tuple_traits<volatile T[n]> {
732 typedef const volatile T (&type)[n];
735 template<class T, int n>
736 struct make_tuple_traits<const volatile T[n]> {
737 typedef const volatile T (&type)[n];
741 struct make_tuple_traits<reference_wrapper<T> >{
746 struct make_tuple_traits<const reference_wrapper<T> >{
755 // a helper traits to make the make_tuple functions shorter (Vesa Karvonen's
758 class T0 = null_type, class T1 = null_type, class T2 = null_type,
759 class T3 = null_type, class T4 = null_type, class T5 = null_type,
760 class T6 = null_type, class T7 = null_type, class T8 = null_type,
763 struct make_tuple_mapper {
765 tuple<typename make_tuple_traits<T0>::type,
766 typename make_tuple_traits<T1>::type,
767 typename make_tuple_traits<T2>::type,
768 typename make_tuple_traits<T3>::type,
769 typename make_tuple_traits<T4>::type,
770 typename make_tuple_traits<T5>::type,
771 typename make_tuple_traits<T6>::type,
772 typename make_tuple_traits<T7>::type,
773 typename make_tuple_traits<T8>::type,
774 typename make_tuple_traits<T9>::type> type;
779 // -make_tuple function templates -----------------------------------
780 inline tuple<> make_tuple() {
785 inline typename detail::make_tuple_mapper<T0>::type
786 make_tuple(const T0& t0) {
787 typedef typename detail::make_tuple_mapper<T0>::type t;
791 template<class T0, class T1>
792 inline typename detail::make_tuple_mapper<T0, T1>::type
793 make_tuple(const T0& t0, const T1& t1) {
794 typedef typename detail::make_tuple_mapper<T0, T1>::type t;
798 template<class T0, class T1, class T2>
799 inline typename detail::make_tuple_mapper<T0, T1, T2>::type
800 make_tuple(const T0& t0, const T1& t1, const T2& t2) {
801 typedef typename detail::make_tuple_mapper<T0, T1, T2>::type t;
802 return t(t0, t1, t2);
805 template<class T0, class T1, class T2, class T3>
806 inline typename detail::make_tuple_mapper<T0, T1, T2, T3>::type
807 make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3) {
808 typedef typename detail::make_tuple_mapper<T0, T1, T2, T3>::type t;
809 return t(t0, t1, t2, t3);
812 template<class T0, class T1, class T2, class T3, class T4>
813 inline typename detail::make_tuple_mapper<T0, T1, T2, T3, T4>::type
814 make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3,
816 typedef typename detail::make_tuple_mapper<T0, T1, T2, T3, T4>::type t;
817 return t(t0, t1, t2, t3, t4);
820 template<class T0, class T1, class T2, class T3, class T4, class T5>
821 inline typename detail::make_tuple_mapper<T0, T1, T2, T3, T4, T5>::type
822 make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3,
823 const T4& t4, const T5& t5) {
824 typedef typename detail::make_tuple_mapper<T0, T1, T2, T3, T4, T5>::type t;
825 return t(t0, t1, t2, t3, t4, t5);
828 template<class T0, class T1, class T2, class T3, class T4, class T5, class T6>
829 inline typename detail::make_tuple_mapper<T0, T1, T2, T3, T4, T5, T6>::type
830 make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3,
831 const T4& t4, const T5& t5, const T6& t6) {
832 typedef typename detail::make_tuple_mapper
833 <T0, T1, T2, T3, T4, T5, T6>::type t;
834 return t(t0, t1, t2, t3, t4, t5, t6);
837 template<class T0, class T1, class T2, class T3, class T4, class T5, class T6,
839 inline typename detail::make_tuple_mapper<T0, T1, T2, T3, T4, T5, T6, T7>::type
840 make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3,
841 const T4& t4, const T5& t5, const T6& t6, const T7& t7) {
842 typedef typename detail::make_tuple_mapper
843 <T0, T1, T2, T3, T4, T5, T6, T7>::type t;
844 return t(t0, t1, t2, t3, t4, t5, t6, t7);
847 template<class T0, class T1, class T2, class T3, class T4, class T5, class T6,
849 inline typename detail::make_tuple_mapper
850 <T0, T1, T2, T3, T4, T5, T6, T7, T8>::type
851 make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3,
852 const T4& t4, const T5& t5, const T6& t6, const T7& t7,
854 typedef typename detail::make_tuple_mapper
855 <T0, T1, T2, T3, T4, T5, T6, T7, T8>::type t;
856 return t(t0, t1, t2, t3, t4, t5, t6, t7, t8);
859 template<class T0, class T1, class T2, class T3, class T4, class T5, class T6,
860 class T7, class T8, class T9>
861 inline typename detail::make_tuple_mapper
862 <T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::type
863 make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3,
864 const T4& t4, const T5& t5, const T6& t6, const T7& t7,
865 const T8& t8, const T9& t9) {
866 typedef typename detail::make_tuple_mapper
867 <T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::type t;
868 return t(t0, t1, t2, t3, t4, t5, t6, t7, t8, t9);
873 // Tie function templates -------------------------------------------------
875 inline tuple<T1&> tie(T1& t1) {
876 return tuple<T1&> (t1);
879 template<class T1, class T2>
880 inline tuple<T1&, T2&> tie(T1& t1, T2& t2) {
881 return tuple<T1&, T2&> (t1, t2);
884 template<class T1, class T2, class T3>
885 inline tuple<T1&, T2&, T3&> tie(T1& t1, T2& t2, T3& t3) {
886 return tuple<T1&, T2&, T3&> (t1, t2, t3);
889 template<class T1, class T2, class T3, class T4>
890 inline tuple<T1&, T2&, T3&, T4&> tie(T1& t1, T2& t2, T3& t3, T4& t4) {
891 return tuple<T1&, T2&, T3&, T4&> (t1, t2, t3, t4);
894 template<class T1, class T2, class T3, class T4, class T5>
895 inline tuple<T1&, T2&, T3&, T4&, T5&>
896 tie(T1& t1, T2& t2, T3& t3, T4& t4, T5& t5) {
897 return tuple<T1&, T2&, T3&, T4&, T5&> (t1, t2, t3, t4, t5);
900 template<class T1, class T2, class T3, class T4, class T5, class T6>
901 inline tuple<T1&, T2&, T3&, T4&, T5&, T6&>
902 tie(T1& t1, T2& t2, T3& t3, T4& t4, T5& t5, T6& t6) {
903 return tuple<T1&, T2&, T3&, T4&, T5&, T6&> (t1, t2, t3, t4, t5, t6);
906 template<class T1, class T2, class T3, class T4, class T5, class T6, class T7>
907 inline tuple<T1&, T2&, T3&, T4&, T5&, T6&, T7&>
908 tie(T1& t1, T2& t2, T3& t3, T4& t4, T5& t5, T6& t6, T7& t7) {
909 return tuple<T1&, T2&, T3&, T4&, T5&, T6&, T7&> (t1, t2, t3, t4, t5, t6, t7);
912 template<class T1, class T2, class T3, class T4, class T5, class T6, class T7,
914 inline tuple<T1&, T2&, T3&, T4&, T5&, T6&, T7&, T8&>
915 tie(T1& t1, T2& t2, T3& t3, T4& t4, T5& t5, T6& t6, T7& t7, T8& t8) {
916 return tuple<T1&, T2&, T3&, T4&, T5&, T6&, T7&, T8&>
917 (t1, t2, t3, t4, t5, t6, t7, t8);
920 template<class T1, class T2, class T3, class T4, class T5, class T6, class T7,
922 inline tuple<T1&, T2&, T3&, T4&, T5&, T6&, T7&, T8&, T9&>
923 tie(T1& t1, T2& t2, T3& t3, T4& t4, T5& t5, T6& t6, T7& t7, T8& t8,
925 return tuple<T1&, T2&, T3&, T4&, T5&, T6&, T7&, T8&, T9&>
926 (t1, t2, t3, t4, t5, t6, t7, t8, t9);
929 template<class T1, class T2, class T3, class T4, class T5, class T6, class T7,
930 class T8, class T9, class T10>
931 inline tuple<T1&, T2&, T3&, T4&, T5&, T6&, T7&, T8&, T9&, T10&>
932 tie(T1& t1, T2& t2, T3& t3, T4& t4, T5& t5, T6& t6, T7& t7, T8& t8,
934 return tuple<T1&, T2&, T3&, T4&, T5&, T6&, T7&, T8&, T9&, T10&>
935 (t1, t2, t3, t4, t5, t6, t7, t8, t9, t10);
938 } // end of namespace tuples
939 } // end of namespace boost
942 #endif // BOOST_TUPLE_BASIC_HPP