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Editing: 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 <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) : inherited(t0, t1, t2, t3, t4, detail::cnull(), detail::cnull(), detail::cnull(), detail::cnull(), detail::cnull()) {} tuple(typename access_traits<T0>::parameter_type t0, typename access_traits<T1>::parameter_type t1, typename access_traits<T2>::parameter_type t2, typename access_traits<T3>::parameter_type t3, typename access_traits<T4>::parameter_type t4, typename access_traits<T5>::parameter_type t5) : inherited(t0, t1, t2, t3, t4, t5, detail::cnull(), detail::cnull(), detail::cnull(), detail::cnull()) {} tuple(typename access_traits<T0>::parameter_type t0, typename access_traits<T1>::parameter_type t1, typename access_traits<T2>::parameter_type t2, typename access_traits<T3>::parameter_type t3, typename access_traits<T4>::parameter_type t4, typename access_traits<T5>::parameter_type t5, typename access_traits<T6>::parameter_type t6) : inherited(t0, t1, t2, t3, t4, t5, t6, detail::cnull(), detail::cnull(), detail::cnull()) {} tuple(typename access_traits<T0>::parameter_type t0, typename access_traits<T1>::parameter_type t1, typename access_traits<T2>::parameter_type t2, typename access_traits<T3>::parameter_type t3, typename access_traits<T4>::parameter_type t4, typename access_traits<T5>::parameter_type t5, typename access_traits<T6>::parameter_type t6, typename access_traits<T7>::parameter_type t7) : inherited(t0, t1, t2, t3, t4, t5, t6, t7, detail::cnull(), detail::cnull()) {} tuple(typename access_traits<T0>::parameter_type t0, typename access_traits<T1>::parameter_type t1, typename access_traits<T2>::parameter_type t2, typename access_traits<T3>::parameter_type t3, typename access_traits<T4>::parameter_type t4, typename access_traits<T5>::parameter_type t5, typename access_traits<T6>::parameter_type t6, typename access_traits<T7>::parameter_type t7, typename access_traits<T8>::parameter_type t8) : inherited(t0, t1, t2, t3, t4, t5, t6, t7, t8, detail::cnull()) {} tuple(typename access_traits<T0>::parameter_type t0, typename access_traits<T1>::parameter_type t1, typename access_traits<T2>::parameter_type t2, typename access_traits<T3>::parameter_type t3, typename access_traits<T4>::parameter_type t4, typename access_traits<T5>::parameter_type t5, typename access_traits<T6>::parameter_type t6, typename access_traits<T7>::parameter_type t7, typename access_traits<T8>::parameter_type t8, typename access_traits<T9>::parameter_type t9) : inherited(t0, t1, t2, t3, t4, t5, t6, t7, t8, t9) {} template<class U1, class U2> tuple(const cons<U1, U2>& p) : inherited(p) {} template <class U1, class U2> tuple& operator=(const cons<U1, U2>& k) { inherited::operator=(k); return *this; } template <class U1, class U2> tuple& operator=(const std::pair<U1, U2>& k) { BOOST_STATIC_ASSERT(length<tuple>::value == 2);// check_length = 2 this->head = k.first; this->tail.head = k.second; return *this; } }; // The empty tuple template <> class tuple<null_type, null_type, null_type, null_type, null_type, null_type, null_type, null_type, null_type, null_type> : public null_type { public: typedef null_type inherited; }; // Swallows any assignment (by Doug Gregor) namespace detail { struct swallow_assign; 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
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