1 // tuple_basic.hpp -----------------------------------------------------
3 // Copyright (C) 1999, 2000 Jaakko Järvi (jaakko.jarvi@cs.utu.fi)
5 // Permission to copy, use, sell and distribute this software is granted
6 // provided this copyright notice appears in all copies.
7 // Permission to modify the code and to distribute modified code is granted
8 // provided this copyright notice appears in all copies, and a notice
9 // that the code was modified is included with the copyright notice.
11 // This software is provided "as is" without express or implied warranty,
12 // and with no claim as to its suitability for any purpose.
14 // For more information, see http://www.boost.org
17 // This and that, Gary Powell.
18 // Fixed return types for get_head/get_tail
19 // ( and other bugs ) per suggestion of Jens Maurer
20 // simplified element type accessors + bug fix (Jeremy Siek)
21 // Several changes/additions according to suggestions by Doug Gregor,
22 // William Kempf, Vesa Karvonen, John Max Skaller, Ed Brey, Beman Dawes,
26 // 2002 05 01 Hugo Duncan: Fix for Borland after Jaakko's previous changes
27 // 2002 04 18 Jaakko: tuple element types can be void or plain function
28 // types, as long as no object is created.
29 // Tuple objects can no hold even noncopyable types
31 // 2001 10 22 John Maddock
32 // Fixes for Borland C++
33 // 2001 08 30 David Abrahams
34 // Added default constructor for cons<>.
35 // -----------------------------------------------------------------
37 #ifndef BOOST_TUPLE_BASIC_HPP
38 #define BOOST_TUPLE_BASIC_HPP
41 #include <utility> // needed for the assignment from pair to tuple
43 #include "boost/type_traits/cv_traits.hpp"
44 #include "boost/type_traits/function_traits.hpp"
49 // -- null_type --------------------------------------------------------
52 // a helper function to provide a const null_type type temporary
54 inline const null_type cnull() { return null_type(); }
57 // -- if construct ------------------------------------------------
58 // Proposed by Krzysztof Czarnecki and Ulrich Eisenecker
60 template <bool If, class Then, class Else> struct IF { typedef Then RET; };
62 template <class Then, class Else> struct IF<false, Then, Else> {
68 // - cons forward declaration -----------------------------------------------
69 template <class HT, class TT> struct cons;
72 // - tuple forward declaration -----------------------------------------------
74 class T0 = null_type, class T1 = null_type, class T2 = null_type,
75 class T3 = null_type, class T4 = null_type, class T5 = null_type,
76 class T6 = null_type, class T7 = null_type, class T8 = null_type,
80 // tuple_length forward declaration
81 template<class T> struct length;
87 // -- generate error template, referencing to non-existing members of this
88 // template is used to produce compilation errors intentionally
92 // - cons getters --------------------------------------------------------
93 // called: get_class<N>::get<RETURN_TYPE>(aTuple)
97 template<class RET, class HT, class TT >
98 inline static RET get(const cons<HT, TT>& t)
100 return get_class<N-1>::BOOST_NESTED_TEMPLATE get<RET>(t.tail);
102 template<class RET, class HT, class TT >
103 inline static RET get(cons<HT, TT>& t)
105 return get_class<N-1>::BOOST_NESTED_TEMPLATE get<RET>(t.tail);
110 struct get_class<0> {
111 template<class RET, class HT, class TT>
112 inline static RET get(const cons<HT, TT>& t)
116 template<class RET, class HT, class TT>
117 inline static RET get(cons<HT, TT>& t)
123 } // end of namespace detail
126 // -cons type accessors ----------------------------------------
127 // typename tuples::element<N,T>::type gets the type of the
128 // Nth element ot T, first element is at index 0
129 // -------------------------------------------------------
131 template<int N, class T>
135 typedef typename T::tail_type Next;
137 typedef typename element<N-1, Next>::type type;
142 typedef typename T::head_type type;
145 template<int N, class T>
146 struct element<N, const T>
149 typedef typename T::tail_type Next;
150 typedef typename element<N-1, Next>::type unqualified_type;
152 typedef typename boost::add_const<unqualified_type>::type type;
155 struct element<0,const T>
157 typedef typename boost::add_const<typename T::head_type>::type type;
160 // -get function templates -----------------------------------------------
161 // Usage: get<N>(aTuple)
163 // -- some traits classes for get functions
165 // access traits lifted from detail namespace to be part of the interface,
166 // (Joel de Guzman's suggestion). Rationale: get functions are part of the
167 // interface, so should the way to express their return types be.
169 template <class T> struct access_traits {
170 typedef const T& const_type;
171 typedef T& non_const_type;
173 typedef const typename boost::remove_cv<T>::type& parameter_type;
175 // used as the tuple constructors parameter types
176 // Rationale: non-reference tuple element types can be cv-qualified.
177 // It should be possible to initialize such types with temporaries,
178 // and when binding temporaries to references, the reference must
179 // be non-volatile and const. 8.5.3. (5)
182 template <class T> struct access_traits<T&> {
184 typedef T& const_type;
185 typedef T& non_const_type;
187 typedef T& parameter_type;
190 // get function for non-const cons-lists, returns a reference to the element
192 template<int N, class HT, class TT>
193 inline typename access_traits<
194 typename element<N, cons<HT, TT> >::type
196 get(cons<HT, TT>& c BOOST_APPEND_EXPLICIT_TEMPLATE_NON_TYPE(int, N)) {
197 return detail::get_class<N>::BOOST_NESTED_TEMPLATE
199 typename access_traits<
200 typename element<N, cons<HT, TT> >::type
201 >::non_const_type>(c);
204 // get function for const cons-lists, returns a const reference to
205 // the element. If the element is a reference, returns the reference
206 // as such (that is, can return a non-const reference)
207 template<int N, class HT, class TT>
208 inline typename access_traits<
209 typename element<N, cons<HT, TT> >::type
211 get(const cons<HT, TT>& c BOOST_APPEND_EXPLICIT_TEMPLATE_NON_TYPE(int, N)) {
212 return detail::get_class<N>::BOOST_NESTED_TEMPLATE
214 typename access_traits<
215 typename element<N, cons<HT, TT> >::type
219 // -- the cons template --------------------------------------------------
222 // These helper templates wrap void types and plain function types.
223 // The reationale is to allow one to write tuple types with those types
224 // as elements, even though it is not possible to instantiate such object.
225 // E.g: typedef tuple<void> some_type; // ok
226 // but: some_type x; // fails
228 template <class T> class non_storeable_type {
229 non_storeable_type();
232 template <class T> struct wrap_non_storeable_type {
234 ::boost::is_function<T>::value, non_storeable_type<T>, T
237 template <> struct wrap_non_storeable_type<void> {
238 typedef non_storeable_type<void> type;
243 template <class HT, class TT>
246 typedef HT head_type;
247 typedef TT tail_type;
250 detail::wrap_non_storeable_type<head_type>::type stored_head_type;
252 stored_head_type head;
255 typename access_traits<stored_head_type>::non_const_type
256 get_head() { return head; }
258 typename access_traits<tail_type>::non_const_type
259 get_tail() { return tail; }
261 typename access_traits<stored_head_type>::const_type
262 get_head() const { return head; }
264 typename access_traits<tail_type>::const_type
265 get_tail() const { return tail; }
267 cons() : head(), tail() {}
268 // cons() : head(detail::default_arg<HT>::f()), tail() {}
270 // the argument for head is not strictly needed, but it prevents
271 // array type elements. This is good, since array type elements
272 // cannot be supported properly in any case (no assignment,
273 // copy works only if the tails are exactly the same type, ...)
275 cons(typename access_traits<stored_head_type>::parameter_type h,
277 : head (h), tail(t) {}
279 template <class T1, class T2, class T3, class T4, class T5,
280 class T6, class T7, class T8, class T9, class T10>
281 cons( T1& t1, T2& t2, T3& t3, T4& t4, T5& t5,
282 T6& t6, T7& t7, T8& t8, T9& t9, T10& t10 )
284 tail (t2, t3, t4, t5, t6, t7, t8, t9, t10, detail::cnull())
287 template <class T2, class T3, class T4, class T5,
288 class T6, class T7, class T8, class T9, class T10>
289 cons( const null_type& t1, T2& t2, T3& t3, T4& t4, T5& t5,
290 T6& t6, T7& t7, T8& t8, T9& t9, T10& t10 )
292 tail (t2, t3, t4, t5, t6, t7, t8, t9, t10, detail::cnull())
296 template <class HT2, class TT2>
297 cons( const cons<HT2, TT2>& u ) : head(u.head), tail(u.tail) {}
299 template <class HT2, class TT2>
300 cons& operator=( const cons<HT2, TT2>& u ) {
301 head=u.head; tail=u.tail; return *this;
304 // must define assignment operator explicitly, implicit version is
305 // illformed if HT is a reference (12.8. (12))
306 cons& operator=(const cons& u) {
307 head = u.head; tail = u.tail; return *this;
310 template <class T1, class T2>
311 cons& operator=( const std::pair<T1, T2>& u ) {
312 BOOST_STATIC_ASSERT(length<cons>::value == 2); // check length = 2
313 head = u.first; tail.head = u.second; return *this;
316 // get member functions (non-const and const)
318 typename access_traits<
319 typename element<N, cons<HT, TT> >::type
322 return boost::tuples::get<N>(*this); // delegate to non-member get
326 typename access_traits<
327 typename element<N, cons<HT, TT> >::type
330 return boost::tuples::get<N>(*this); // delegate to non-member get
335 struct cons<HT, null_type> {
337 typedef HT head_type;
338 typedef null_type tail_type;
339 typedef cons<HT, null_type> self_type;
342 detail::wrap_non_storeable_type<head_type>::type stored_head_type;
343 stored_head_type head;
345 typename access_traits<stored_head_type>::non_const_type
346 get_head() { return head; }
348 null_type get_tail() { return null_type(); }
350 typename access_traits<stored_head_type>::const_type
351 get_head() const { return head; }
353 const null_type get_tail() const { return null_type(); }
355 // cons() : head(detail::default_arg<HT>::f()) {}
358 cons(typename access_traits<stored_head_type>::parameter_type h,
359 const null_type& = null_type())
363 cons(T1& t1, const null_type&, const null_type&, const null_type&,
364 const null_type&, const null_type&, const null_type&,
365 const null_type&, const null_type&, const null_type&)
368 cons(const null_type&,
369 const null_type&, const null_type&, const null_type&,
370 const null_type&, const null_type&, const null_type&,
371 const null_type&, const null_type&, const null_type&)
375 cons( const cons<HT2, null_type>& u ) : head(u.head) {}
378 cons& operator=(const cons<HT2, null_type>& u )
379 { head = u.head; return *this; }
381 // must define assignment operator explicitely, implicit version
382 // is illformed if HT is a reference
383 cons& operator=(const cons& u) { head = u.head; return *this; }
386 typename access_traits<
387 typename element<N, self_type>::type
389 get(BOOST_EXPLICIT_TEMPLATE_NON_TYPE(int, N)) {
390 return boost::tuples::get<N>(*this);
394 typename access_traits<
395 typename element<N, self_type>::type
397 get(BOOST_EXPLICIT_TEMPLATE_NON_TYPE(int, N)) const {
398 return boost::tuples::get<N>(*this);
403 // templates for finding out the length of the tuple -------------------
407 BOOST_STATIC_CONSTANT(int, value = 1 + length<typename T::tail_type>::value);
411 struct length<tuple<> > {
412 BOOST_STATIC_CONSTANT(int, value = 0);
416 struct length<null_type> {
417 BOOST_STATIC_CONSTANT(int, value = 0);
423 // Tuple to cons mapper --------------------------------------------------
424 template <class T0, class T1, class T2, class T3, class T4,
425 class T5, class T6, class T7, class T8, class T9>
426 struct map_tuple_to_cons
429 typename map_tuple_to_cons<T1, T2, T3, T4, T5,
430 T6, T7, T8, T9, null_type>::type
434 // The empty tuple is a null_type
436 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>
438 typedef null_type type;
443 // -------------------------------------------------------------------
444 // -- tuple ------------------------------------------------------
445 template <class T0, class T1, class T2, class T3, class T4,
446 class T5, class T6, class T7, class T8, class T9>
449 public detail::map_tuple_to_cons<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::type
453 detail::map_tuple_to_cons<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::type inherited;
454 typedef typename inherited::head_type head_type;
455 typedef typename inherited::tail_type tail_type;
458 // access_traits<T>::parameter_type takes non-reference types as const T&
461 tuple(typename access_traits<T0>::parameter_type t0)
462 : inherited(t0, detail::cnull(), detail::cnull(), detail::cnull(),
463 detail::cnull(), detail::cnull(), detail::cnull(),
464 detail::cnull(), detail::cnull(), detail::cnull()) {}
466 tuple(typename access_traits<T0>::parameter_type t0,
467 typename access_traits<T1>::parameter_type t1)
468 : inherited(t0, t1, detail::cnull(), detail::cnull(),
469 detail::cnull(), detail::cnull(), detail::cnull(),
470 detail::cnull(), detail::cnull(), detail::cnull()) {}
472 tuple(typename access_traits<T0>::parameter_type t0,
473 typename access_traits<T1>::parameter_type t1,
474 typename access_traits<T2>::parameter_type t2)
475 : inherited(t0, t1, t2, detail::cnull(), detail::cnull(),
476 detail::cnull(), detail::cnull(), detail::cnull(),
477 detail::cnull(), detail::cnull()) {}
479 tuple(typename access_traits<T0>::parameter_type t0,
480 typename access_traits<T1>::parameter_type t1,
481 typename access_traits<T2>::parameter_type t2,
482 typename access_traits<T3>::parameter_type t3)
483 : inherited(t0, t1, t2, t3, detail::cnull(), detail::cnull(),
484 detail::cnull(), detail::cnull(), detail::cnull(),
487 tuple(typename access_traits<T0>::parameter_type t0,
488 typename access_traits<T1>::parameter_type t1,
489 typename access_traits<T2>::parameter_type t2,
490 typename access_traits<T3>::parameter_type t3,
491 typename access_traits<T4>::parameter_type t4)
492 : inherited(t0, t1, t2, t3, t4, detail::cnull(), detail::cnull(),
493 detail::cnull(), detail::cnull(), detail::cnull()) {}
495 tuple(typename access_traits<T0>::parameter_type t0,
496 typename access_traits<T1>::parameter_type t1,
497 typename access_traits<T2>::parameter_type t2,
498 typename access_traits<T3>::parameter_type t3,
499 typename access_traits<T4>::parameter_type t4,
500 typename access_traits<T5>::parameter_type t5)
501 : inherited(t0, t1, t2, t3, t4, t5, detail::cnull(), detail::cnull(),
502 detail::cnull(), detail::cnull()) {}
504 tuple(typename access_traits<T0>::parameter_type t0,
505 typename access_traits<T1>::parameter_type t1,
506 typename access_traits<T2>::parameter_type t2,
507 typename access_traits<T3>::parameter_type t3,
508 typename access_traits<T4>::parameter_type t4,
509 typename access_traits<T5>::parameter_type t5,
510 typename access_traits<T6>::parameter_type t6)
511 : inherited(t0, t1, t2, t3, t4, t5, t6, detail::cnull(),
512 detail::cnull(), detail::cnull()) {}
514 tuple(typename access_traits<T0>::parameter_type t0,
515 typename access_traits<T1>::parameter_type t1,
516 typename access_traits<T2>::parameter_type t2,
517 typename access_traits<T3>::parameter_type t3,
518 typename access_traits<T4>::parameter_type t4,
519 typename access_traits<T5>::parameter_type t5,
520 typename access_traits<T6>::parameter_type t6,
521 typename access_traits<T7>::parameter_type t7)
522 : inherited(t0, t1, t2, t3, t4, t5, t6, t7, detail::cnull(),
525 tuple(typename access_traits<T0>::parameter_type t0,
526 typename access_traits<T1>::parameter_type t1,
527 typename access_traits<T2>::parameter_type t2,
528 typename access_traits<T3>::parameter_type t3,
529 typename access_traits<T4>::parameter_type t4,
530 typename access_traits<T5>::parameter_type t5,
531 typename access_traits<T6>::parameter_type t6,
532 typename access_traits<T7>::parameter_type t7,
533 typename access_traits<T8>::parameter_type t8)
534 : inherited(t0, t1, t2, t3, t4, t5, t6, t7, t8, detail::cnull()) {}
536 tuple(typename access_traits<T0>::parameter_type t0,
537 typename access_traits<T1>::parameter_type t1,
538 typename access_traits<T2>::parameter_type t2,
539 typename access_traits<T3>::parameter_type t3,
540 typename access_traits<T4>::parameter_type t4,
541 typename access_traits<T5>::parameter_type t5,
542 typename access_traits<T6>::parameter_type t6,
543 typename access_traits<T7>::parameter_type t7,
544 typename access_traits<T8>::parameter_type t8,
545 typename access_traits<T9>::parameter_type t9)
546 : inherited(t0, t1, t2, t3, t4, t5, t6, t7, t8, t9) {}
549 template<class U1, class U2>
550 tuple(const cons<U1, U2>& p) : inherited(p) {}
552 template <class U1, class U2>
553 tuple& operator=(const cons<U1, U2>& k) {
554 inherited::operator=(k);
558 template <class U1, class U2>
559 tuple& operator=(const std::pair<U1, U2>& k) {
560 BOOST_STATIC_ASSERT(length<tuple>::value == 2);// check_length = 2
561 this->head = k.first;
562 this->tail.head = k.second;
570 class tuple<null_type, null_type, null_type, null_type, null_type, null_type, null_type, null_type, null_type, null_type> :
574 typedef null_type inherited;
578 // Swallows any assignment (by Doug Gregor)
581 struct swallow_assign {
584 swallow_assign const& operator=(const T&) const {
589 } // namespace detail
591 // "ignore" allows tuple positions to be ignored when using "tie".
592 detail::swallow_assign const ignore = detail::swallow_assign();
594 // ---------------------------------------------------------------------------
595 // The call_traits for make_tuple
596 // Honours the reference_wrapper class.
598 // Must be instantiated with plain or const plain types (not with references)
600 // from template<class T> foo(const T& t) : make_tuple_traits<const T>::type
601 // from template<class T> foo(T& t) : make_tuple_traits<T>::type
605 // references -> compile_time_error
606 // reference_wrapper<T> -> T&
607 // const reference_wrapper<T> -> T&
608 // array -> const ref array
612 struct make_tuple_traits {
615 // commented away, see below (JJ)
616 // typedef typename IF<
617 // boost::is_function<T>::value,
623 // The is_function test was there originally for plain function types,
624 // which can't be stored as such (we must either store them as references or
625 // pointers). Such a type could be formed if make_tuple was called with a
626 // reference to a function.
627 // But this would mean that a const qualified function type was formed in
628 // the make_tuple function and hence make_tuple can't take a function
629 // reference as a parameter, and thus T can't be a function type.
630 // So is_function test was removed.
631 // (14.8.3. says that type deduction fails if a cv-qualified function type
632 // is created. (It only applies for the case of explicitly specifying template
633 // args, though?)) (JJ)
636 struct make_tuple_traits<T&> {
638 detail::generate_error<T&>::
639 do_not_use_with_reference_type error;
642 // Arrays can't be stored as plain types; convert them to references.
643 // All arrays are converted to const. This is because make_tuple takes its
644 // parameters as const T& and thus the knowledge of the potential
645 // non-constness of actual argument is lost.
646 template<class T, int n> struct make_tuple_traits <T[n]> {
647 typedef const T (&type)[n];
650 template<class T, int n>
651 struct make_tuple_traits<const T[n]> {
652 typedef const T (&type)[n];
655 template<class T, int n> struct make_tuple_traits<volatile T[n]> {
656 typedef const volatile T (&type)[n];
659 template<class T, int n>
660 struct make_tuple_traits<const volatile T[n]> {
661 typedef const volatile T (&type)[n];
665 struct make_tuple_traits<reference_wrapper<T> >{
670 struct make_tuple_traits<const reference_wrapper<T> >{
679 // a helper traits to make the make_tuple functions shorter (Vesa Karvonen's
682 class T0 = null_type, class T1 = null_type, class T2 = null_type,
683 class T3 = null_type, class T4 = null_type, class T5 = null_type,
684 class T6 = null_type, class T7 = null_type, class T8 = null_type,
687 struct make_tuple_mapper {
689 tuple<typename make_tuple_traits<T0>::type,
690 typename make_tuple_traits<T1>::type,
691 typename make_tuple_traits<T2>::type,
692 typename make_tuple_traits<T3>::type,
693 typename make_tuple_traits<T4>::type,
694 typename make_tuple_traits<T5>::type,
695 typename make_tuple_traits<T6>::type,
696 typename make_tuple_traits<T7>::type,
697 typename make_tuple_traits<T8>::type,
698 typename make_tuple_traits<T9>::type> type;
703 // -make_tuple function templates -----------------------------------
704 inline tuple<> make_tuple() {
709 inline typename detail::make_tuple_mapper<T0>::type
710 make_tuple(const T0& t0) {
711 typedef typename detail::make_tuple_mapper<T0>::type t;
715 template<class T0, class T1>
716 inline typename detail::make_tuple_mapper<T0, T1>::type
717 make_tuple(const T0& t0, const T1& t1) {
718 typedef typename detail::make_tuple_mapper<T0, T1>::type t;
722 template<class T0, class T1, class T2>
723 inline typename detail::make_tuple_mapper<T0, T1, T2>::type
724 make_tuple(const T0& t0, const T1& t1, const T2& t2) {
725 typedef typename detail::make_tuple_mapper<T0, T1, T2>::type t;
726 return t(t0, t1, t2);
729 template<class T0, class T1, class T2, class T3>
730 inline typename detail::make_tuple_mapper<T0, T1, T2, T3>::type
731 make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3) {
732 typedef typename detail::make_tuple_mapper<T0, T1, T2, T3>::type t;
733 return t(t0, t1, t2, t3);
736 template<class T0, class T1, class T2, class T3, class T4>
737 inline typename detail::make_tuple_mapper<T0, T1, T2, T3, T4>::type
738 make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3,
740 typedef typename detail::make_tuple_mapper<T0, T1, T2, T3, T4>::type t;
741 return t(t0, t1, t2, t3, t4);
744 template<class T0, class T1, class T2, class T3, class T4, class T5>
745 inline typename detail::make_tuple_mapper<T0, T1, T2, T3, T4, T5>::type
746 make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3,
747 const T4& t4, const T5& t5) {
748 typedef typename detail::make_tuple_mapper<T0, T1, T2, T3, T4, T5>::type t;
749 return t(t0, t1, t2, t3, t4, t5);
752 template<class T0, class T1, class T2, class T3, class T4, class T5, class T6>
753 inline typename detail::make_tuple_mapper<T0, T1, T2, T3, T4, T5, T6>::type
754 make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3,
755 const T4& t4, const T5& t5, const T6& t6) {
756 typedef typename detail::make_tuple_mapper
757 <T0, T1, T2, T3, T4, T5, T6>::type t;
758 return t(t0, t1, t2, t3, t4, t5, t6);
761 template<class T0, class T1, class T2, class T3, class T4, class T5, class T6,
763 inline typename detail::make_tuple_mapper<T0, T1, T2, T3, T4, T5, T6, T7>::type
764 make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3,
765 const T4& t4, const T5& t5, const T6& t6, const T7& t7) {
766 typedef typename detail::make_tuple_mapper
767 <T0, T1, T2, T3, T4, T5, T6, T7>::type t;
768 return t(t0, t1, t2, t3, t4, t5, t6, t7);
771 template<class T0, class T1, class T2, class T3, class T4, class T5, class T6,
773 inline typename detail::make_tuple_mapper
774 <T0, T1, T2, T3, T4, T5, T6, T7, T8>::type
775 make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3,
776 const T4& t4, const T5& t5, const T6& t6, const T7& t7,
778 typedef typename detail::make_tuple_mapper
779 <T0, T1, T2, T3, T4, T5, T6, T7, T8>::type t;
780 return t(t0, t1, t2, t3, t4, t5, t6, t7, t8);
783 template<class T0, class T1, class T2, class T3, class T4, class T5, class T6,
784 class T7, class T8, class T9>
785 inline typename detail::make_tuple_mapper
786 <T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::type
787 make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3,
788 const T4& t4, const T5& t5, const T6& t6, const T7& t7,
789 const T8& t8, const T9& t9) {
790 typedef typename detail::make_tuple_mapper
791 <T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::type t;
792 return t(t0, t1, t2, t3, t4, t5, t6, t7, t8, t9);
797 // Tie function templates -------------------------------------------------
799 inline tuple<T1&> tie(T1& t1) {
800 return tuple<T1&> (t1);
803 template<class T1, class T2>
804 inline tuple<T1&, T2&> tie(T1& t1, T2& t2) {
805 return tuple<T1&, T2&> (t1, t2);
808 template<class T1, class T2, class T3>
809 inline tuple<T1&, T2&, T3&> tie(T1& t1, T2& t2, T3& t3) {
810 return tuple<T1&, T2&, T3&> (t1, t2, t3);
813 template<class T1, class T2, class T3, class T4>
814 inline tuple<T1&, T2&, T3&, T4&> tie(T1& t1, T2& t2, T3& t3, T4& t4) {
815 return tuple<T1&, T2&, T3&, T4&> (t1, t2, t3, t4);
818 template<class T1, class T2, class T3, class T4, class T5>
819 inline tuple<T1&, T2&, T3&, T4&, T5&>
820 tie(T1& t1, T2& t2, T3& t3, T4& t4, T5& t5) {
821 return tuple<T1&, T2&, T3&, T4&, T5&> (t1, t2, t3, t4, t5);
824 template<class T1, class T2, class T3, class T4, class T5, class T6>
825 inline tuple<T1&, T2&, T3&, T4&, T5&, T6&>
826 tie(T1& t1, T2& t2, T3& t3, T4& t4, T5& t5, T6& t6) {
827 return tuple<T1&, T2&, T3&, T4&, T5&, T6&> (t1, t2, t3, t4, t5, t6);
830 template<class T1, class T2, class T3, class T4, class T5, class T6, class T7>
831 inline tuple<T1&, T2&, T3&, T4&, T5&, T6&, T7&>
832 tie(T1& t1, T2& t2, T3& t3, T4& t4, T5& t5, T6& t6, T7& t7) {
833 return tuple<T1&, T2&, T3&, T4&, T5&, T6&, T7&> (t1, t2, t3, t4, t5, t6, t7);
836 template<class T1, class T2, class T3, class T4, class T5, class T6, class T7,
838 inline tuple<T1&, T2&, T3&, T4&, T5&, T6&, T7&, T8&>
839 tie(T1& t1, T2& t2, T3& t3, T4& t4, T5& t5, T6& t6, T7& t7, T8& t8) {
840 return tuple<T1&, T2&, T3&, T4&, T5&, T6&, T7&, T8&>
841 (t1, t2, t3, t4, t5, t6, t7, t8);
844 template<class T1, class T2, class T3, class T4, class T5, class T6, class T7,
846 inline tuple<T1&, T2&, T3&, T4&, T5&, T6&, T7&, T8&, T9&>
847 tie(T1& t1, T2& t2, T3& t3, T4& t4, T5& t5, T6& t6, T7& t7, T8& t8,
849 return tuple<T1&, T2&, T3&, T4&, T5&, T6&, T7&, T8&, T9&>
850 (t1, t2, t3, t4, t5, t6, t7, t8, t9);
853 template<class T1, class T2, class T3, class T4, class T5, class T6, class T7,
854 class T8, class T9, class T10>
855 inline tuple<T1&, T2&, T3&, T4&, T5&, T6&, T7&, T8&, T9&, T10&>
856 tie(T1& t1, T2& t2, T3& t3, T4& t4, T5& t5, T6& t6, T7& t7, T8& t8,
858 return tuple<T1&, T2&, T3&, T4&, T5&, T6&, T7&, T8&, T9&, T10&>
859 (t1, t2, t3, t4, t5, t6, t7, t8, t9, t10);
862 } // end of namespace tuples
863 } // end of namespace boost
866 #endif // BOOST_TUPLE_BASIC_HPP