// 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/utility/swap.hpp" | |
#include "boost/detail/workaround.hpp" // needed for BOOST_WORKAROUND | |
namespace boost { | |
namespace tuples { | |
// -- null_type -------------------------------------------------------- | |
struct null_type {}; | |
// a helper function to provide a const null_type type temporary | |
namespace detail { | |
inline const null_type cnull() { return null_type(); } | |
// -- if construct ------------------------------------------------ | |
// Proposed by Krzysztof Czarnecki and Ulrich Eisenecker | |
template <bool If, class Then, class Else> struct IF { typedef Then RET; }; | |
template <class Then, class Else> struct IF<false, Then, Else> { | |
typedef Else RET; | |
}; | |
} // end detail | |
// - cons forward declaration ----------------------------------------------- | |
template <class HT, class TT> struct cons; | |
// - tuple forward declaration ----------------------------------------------- | |
template < | |
class T0 = null_type, class T1 = null_type, class T2 = null_type, | |
class T3 = null_type, class T4 = null_type, class T5 = null_type, | |
class T6 = null_type, class T7 = null_type, class T8 = null_type, | |
class T9 = null_type> | |
class tuple; | |
// tuple_length forward declaration | |
template<class T> struct length; | |
namespace detail { | |
// -- generate error template, referencing to non-existing members of this | |
// template is used to produce compilation errors intentionally | |
template<class T> | |
class generate_error; | |
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(__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 BOOST_APPEND_EXPLICIT_TEMPLATE_NON_TYPE(int, N)) { | |
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 BOOST_APPEND_EXPLICIT_TEMPLATE_NON_TYPE(int, N)) { | |
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 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()) | |
{} | |
template <class HT2, class TT2> | |
cons( const cons<HT2, TT2>& u ) : head(u.head), tail(u.tail) {} | |
template <class HT2, class TT2> | |
cons& operator=( const cons<HT2, TT2>& u ) { | |
head=u.head; tail=u.tail; return *this; | |
} | |
// must define assignment operator explicitly, implicit version is | |
// illformed if HT is a reference (12.8. (12)) | |
cons& operator=(const cons& u) { | |
head = u.head; tail = u.tail; return *this; | |
} | |
template <class T1, class T2> | |
cons& operator=( const std::pair<T1, T2>& u ) { | |
BOOST_STATIC_ASSERT(length<cons>::value == 2); // check length = 2 | |
head = u.first; tail.head = u.second; return *this; | |
} | |
// get member functions (non-const and const) | |
template <int N> | |
typename access_traits< | |
typename element<N, cons<HT, TT> >::type | |
>::non_const_type | |
get() { | |
return boost::tuples::get<N>(*this); // delegate to non-member get | |
} | |
template <int N> | |
typename access_traits< | |
typename element<N, cons<HT, TT> >::type | |
>::const_type | |
get() const { | |
return boost::tuples::get<N>(*this); // delegate to non-member get | |
} | |
}; | |
template <class HT> | |
struct cons<HT, null_type> { | |
typedef HT head_type; | |
typedef null_type tail_type; | |
typedef cons<HT, null_type> self_type; | |
typedef typename | |
detail::wrap_non_storeable_type<head_type>::type stored_head_type; | |
stored_head_type head; | |
typename access_traits<stored_head_type>::non_const_type | |
get_head() { return head; } | |
null_type get_tail() { return null_type(); } | |
typename access_traits<stored_head_type>::const_type | |
get_head() const { return head; } | |
const null_type get_tail() const { return null_type(); } | |
// cons() : head(detail::default_arg<HT>::f()) {} | |
cons() : head() {} | |
cons(typename access_traits<stored_head_type>::parameter_type h, | |
const null_type& = null_type()) | |
: head (h) {} | |
template<class T1> | |
cons(T1& t1, const null_type&, const null_type&, const null_type&, | |
const null_type&, const null_type&, const null_type&, | |
const null_type&, const null_type&, const null_type&) | |
: head (t1) {} | |
cons(const null_type&, | |
const null_type&, const null_type&, const null_type&, | |
const null_type&, const null_type&, const null_type&, | |
const null_type&, const null_type&, const null_type&) | |
: head () {} | |
template <class HT2> | |
cons( const cons<HT2, null_type>& u ) : head(u.head) {} | |
template <class HT2> | |
cons& operator=(const cons<HT2, null_type>& u ) | |
{ head = u.head; return *this; } | |
// must define assignment operator explicitely, implicit version | |
// is illformed if HT is a reference | |
cons& operator=(const cons& u) { head = u.head; return *this; } | |
template <int N> | |
typename access_traits< | |
typename element<N, self_type>::type | |
>::non_const_type | |
get(BOOST_EXPLICIT_TEMPLATE_NON_TYPE(int, N)) { | |
return boost::tuples::get<N>(*this); | |
} | |
template <int N> | |
typename access_traits< | |
typename element<N, self_type>::type | |
>::const_type | |
get(BOOST_EXPLICIT_TEMPLATE_NON_TYPE(int, N)) const { | |
return boost::tuples::get<N>(*this); | |
} | |
}; | |
// templates for finding out the length of the tuple ------------------- | |
template<class T> | |
struct length { | |
BOOST_STATIC_CONSTANT(int, value = 1 + length<typename T::tail_type>::value); | |
}; | |
template<> | |
struct length<tuple<> > { | |
BOOST_STATIC_CONSTANT(int, value = 0); | |
}; | |
template<> | |
struct length<tuple<> const> { | |
BOOST_STATIC_CONSTANT(int, value = 0); | |
}; | |
template<> | |
struct length<null_type> { | |
BOOST_STATIC_CONSTANT(int, value = 0); | |
}; | |
template<> | |
struct length<null_type const> { | |
BOOST_STATIC_CONSTANT(int, value = 0); | |
}; | |
namespace detail { | |
// Tuple to cons mapper -------------------------------------------------- | |
template <class T0, class T1, class T2, class T3, class T4, | |
class T5, class T6, class T7, class T8, class T9> | |
struct map_tuple_to_cons | |
{ | |
typedef cons<T0, | |
typename map_tuple_to_cons<T1, T2, T3, T4, T5, | |
T6, T7, T8, T9, null_type>::type | |
> type; | |
}; | |
// The empty tuple is a null_type | |
template <> | |
struct map_tuple_to_cons<null_type, null_type, null_type, null_type, null_type, null_type, null_type, null_type, null_type, null_type> | |
{ | |
typedef null_type type; | |
}; | |
} // end detail | |
// ------------------------------------------------------------------- | |
// -- tuple ------------------------------------------------------ | |
template <class T0, class T1, class T2, class T3, class T4, | |
class T5, class T6, class T7, class T8, class T9> | |
class tuple : | |
public detail::map_tuple_to_cons<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::type | |
{ | |
public: | |
typedef typename | |
detail::map_tuple_to_cons<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::type inherited; | |
typedef typename inherited::head_type head_type; | |
typedef typename inherited::tail_type tail_type; | |
// access_traits<T>::parameter_type takes non-reference types as const T& | |
tuple() {} | |
tuple(typename access_traits<T0>::parameter_type t0) | |
: inherited(t0, detail::cnull(), detail::cnull(), detail::cnull(), | |
detail::cnull(), detail::cnull(), detail::cnull(), | |
detail::cnull(), detail::cnull(), detail::cnull()) {} | |
tuple(typename access_traits<T0>::parameter_type t0, | |
typename access_traits<T1>::parameter_type t1) | |
: inherited(t0, t1, detail::cnull(), detail::cnull(), | |
detail::cnull(), detail::cnull(), detail::cnull(), | |
detail::cnull(), detail::cnull(), detail::cnull()) {} | |
tuple(typename access_traits<T0>::parameter_type t0, | |
typename access_traits<T1>::parameter_type t1, | |
typename access_traits<T2>::parameter_type t2) | |
: inherited(t0, t1, t2, detail::cnull(), detail::cnull(), | |
detail::cnull(), detail::cnull(), detail::cnull(), | |
detail::cnull(), detail::cnull()) {} | |
tuple(typename access_traits<T0>::parameter_type t0, | |
typename access_traits<T1>::parameter_type t1, | |
typename access_traits<T2>::parameter_type t2, | |
typename access_traits<T3>::parameter_type t3) | |
: inherited(t0, t1, t2, t3, detail::cnull(), detail::cnull(), | |
detail::cnull(), detail::cnull(), detail::cnull(), | |
detail::cnull()) {} | |
tuple(typename access_traits<T0>::parameter_type t0, | |
typename access_traits<T1>::parameter_type t1, | |
typename access_traits<T2>::parameter_type t2, | |
typename access_traits<T3>::parameter_type t3, | |
typename access_traits<T4>::parameter_type t4) | |
: inherited(t0, t1, t2, t3, t4, detail::cnull(), detail::cnull(), | |
detail::cnull(), detail::cnull(), detail::cnull()) {} | |
tuple(typename access_traits<T0>::parameter_type t0, | |
typename access_traits<T1>::parameter_type t1, | |
typename access_traits<T2>::parameter_type t2, | |
typename access_traits<T3>::parameter_type t3, | |
typename access_traits<T4>::parameter_type t4, | |
typename access_traits<T5>::parameter_type t5) | |
: inherited(t0, t1, t2, t3, t4, t5, detail::cnull(), detail::cnull(), | |
detail::cnull(), detail::cnull()) {} | |
tuple(typename access_traits<T0>::parameter_type t0, | |
typename access_traits<T1>::parameter_type t1, | |
typename access_traits<T2>::parameter_type t2, | |
typename access_traits<T3>::parameter_type t3, | |
typename access_traits<T4>::parameter_type t4, | |
typename access_traits<T5>::parameter_type t5, | |
typename access_traits<T6>::parameter_type t6) | |
: inherited(t0, t1, t2, t3, t4, t5, t6, detail::cnull(), | |
detail::cnull(), detail::cnull()) {} | |
tuple(typename access_traits<T0>::parameter_type t0, | |
typename access_traits<T1>::parameter_type t1, | |
typename access_traits<T2>::parameter_type t2, | |
typename access_traits<T3>::parameter_type t3, | |
typename access_traits<T4>::parameter_type t4, | |
typename access_traits<T5>::parameter_type t5, | |
typename access_traits<T6>::parameter_type t6, | |
typename access_traits<T7>::parameter_type t7) | |
: inherited(t0, t1, t2, t3, t4, t5, t6, t7, detail::cnull(), | |
detail::cnull()) {} | |
tuple(typename access_traits<T0>::parameter_type t0, | |
typename access_traits<T1>::parameter_type t1, | |
typename access_traits<T2>::parameter_type t2, | |
typename access_traits<T3>::parameter_type t3, | |
typename access_traits<T4>::parameter_type t4, | |
typename access_traits<T5>::parameter_type t5, | |
typename access_traits<T6>::parameter_type t6, | |
typename access_traits<T7>::parameter_type t7, | |
typename access_traits<T8>::parameter_type t8) | |
: inherited(t0, t1, t2, t3, t4, t5, t6, t7, t8, detail::cnull()) {} | |
tuple(typename access_traits<T0>::parameter_type t0, | |
typename access_traits<T1>::parameter_type t1, | |
typename access_traits<T2>::parameter_type t2, | |
typename access_traits<T3>::parameter_type t3, | |
typename access_traits<T4>::parameter_type t4, | |
typename access_traits<T5>::parameter_type t5, | |
typename access_traits<T6>::parameter_type t6, | |
typename access_traits<T7>::parameter_type t7, | |
typename access_traits<T8>::parameter_type t8, | |
typename access_traits<T9>::parameter_type t9) | |
: inherited(t0, t1, t2, t3, t4, t5, t6, t7, t8, t9) {} | |
template<class U1, class U2> | |
tuple(const cons<U1, U2>& p) : inherited(p) {} | |
template <class U1, class U2> | |
tuple& operator=(const cons<U1, U2>& k) { | |
inherited::operator=(k); | |
return *this; | |
} | |
template <class U1, class U2> | |
tuple& operator=(const std::pair<U1, U2>& k) { | |
BOOST_STATIC_ASSERT(length<tuple>::value == 2);// check_length = 2 | |
this->head = k.first; | |
this->tail.head = k.second; | |
return *this; | |
} | |
}; | |
// The empty tuple | |
template <> | |
class tuple<null_type, null_type, null_type, null_type, null_type, null_type, null_type, null_type, null_type, null_type> : | |
public null_type | |
{ | |
public: | |
typedef null_type inherited; | |
}; | |
// Swallows any assignment (by Doug Gregor) | |
namespace detail { | |
struct swallow_assign; | |
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 | |
#endif // BOOST_TUPLE_BASIC_HPP | |