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// tuple_basic.hpp -----------------------------------------------------
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// Copyright (C) 1999, 2000 Jaakko Jarvi (jaakko.jarvi@cs.utu.fi)
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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// For more information, see http://www.boost.org
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// This and that, Gary Powell.
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// Fixed return types for get_head/get_tail
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// ( and other bugs ) per suggestion of Jens Maurer
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// simplified element type accessors + bug fix (Jeremy Siek)
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// Several changes/additions according to suggestions by Douglas Gregor,
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// William Kempf, Vesa Karvonen, John Max Skaller, Ed Brey, Beman Dawes,
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// 2002 05 01 Hugo Duncan: Fix for Borland after Jaakko's previous changes
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// 2002 04 18 Jaakko: tuple element types can be void or plain function
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// types, as long as no object is created.
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// Tuple objects can no hold even noncopyable types
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// 2001 10 22 John Maddock
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// Fixes for Borland C++
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// 2001 08 30 David Abrahams
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// Added default constructor for cons<>.
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// -----------------------------------------------------------------
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#ifndef BOOST_TUPLE_BASIC_HPP
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#define BOOST_TUPLE_BASIC_HPP
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#include <utility> // needed for the assignment from pair to tuple
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#include "boost/type_traits/cv_traits.hpp"
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#include "boost/type_traits/function_traits.hpp"
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#include "boost/utility/swap.hpp"
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#include "boost/detail/workaround.hpp" // needed for BOOST_WORKAROUND
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// -- null_type --------------------------------------------------------
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// a helper function to provide a const null_type type temporary
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inline const null_type cnull() { return null_type(); }
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// -- if construct ------------------------------------------------
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// Proposed by Krzysztof Czarnecki and Ulrich Eisenecker
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template <bool If, class Then, class Else> struct IF { typedef Then RET; };
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template <class Then, class Else> struct IF<false, Then, Else> {
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// - cons forward declaration -----------------------------------------------
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template <class HT, class TT> struct cons;
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// - tuple forward declaration -----------------------------------------------
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class T0 = null_type, class T1 = null_type, class T2 = null_type,
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class T3 = null_type, class T4 = null_type, class T5 = null_type,
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class T6 = null_type, class T7 = null_type, class T8 = null_type,
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// tuple_length forward declaration
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template<class T> struct length;
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// -- generate error template, referencing to non-existing members of this
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// template is used to produce compilation errors intentionally
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typedef BOOST_DEDUCED_TYPENAME drop_front<N-1>::BOOST_NESTED_TEMPLATE
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typedef BOOST_DEDUCED_TYPENAME next::type::tail_type type;
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static const type& call(const Tuple& tup) {
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return next::call(tup).tail;
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struct drop_front<0> {
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template<class Tuple>
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static const type& call(const Tuple& tup) {
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} // end of namespace detail
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// -cons type accessors ----------------------------------------
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// typename tuples::element<N,T>::type gets the type of the
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// Nth element ot T, first element is at index 0
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// -------------------------------------------------------
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#ifndef BOOST_NO_CV_SPECIALIZATIONS
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template<int N, class T>
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typedef BOOST_DEDUCED_TYPENAME detail::drop_front<N>::BOOST_NESTED_TEMPLATE
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apply<T>::type::head_type type;
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template<int N, class T>
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struct element<N, const T>
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typedef BOOST_DEDUCED_TYPENAME detail::drop_front<N>::BOOST_NESTED_TEMPLATE
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apply<T>::type::head_type unqualified_type;
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#if BOOST_WORKAROUND(__BORLANDC__,<0x600)
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typedef const unqualified_type type;
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typedef BOOST_DEDUCED_TYPENAME boost::add_const<unqualified_type>::type type;
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#else // def BOOST_NO_CV_SPECIALIZATIONS
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template<int N, class T, bool IsConst>
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typedef BOOST_DEDUCED_TYPENAME detail::drop_front<N>::BOOST_NESTED_TEMPLATE
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apply<T>::type::head_type type;
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template<int N, class T>
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struct element_impl<N, T, true /* IsConst */>
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typedef BOOST_DEDUCED_TYPENAME detail::drop_front<N>::BOOST_NESTED_TEMPLATE
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apply<T>::type::head_type unqualified_type;
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typedef const unqualified_type type;
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} // end of namespace detail
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template<int N, class T>
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public detail::element_impl<N, T, ::boost::is_const<T>::value>
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// -get function templates -----------------------------------------------
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// Usage: get<N>(aTuple)
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// -- some traits classes for get functions
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// access traits lifted from detail namespace to be part of the interface,
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// (Joel de Guzman's suggestion). Rationale: get functions are part of the
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// interface, so should the way to express their return types be.
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template <class T> struct access_traits {
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typedef const T& const_type;
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typedef T& non_const_type;
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typedef const typename boost::remove_cv<T>::type& parameter_type;
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// used as the tuple constructors parameter types
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// Rationale: non-reference tuple element types can be cv-qualified.
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// It should be possible to initialize such types with temporaries,
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// and when binding temporaries to references, the reference must
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// be non-volatile and const. 8.5.3. (5)
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template <class T> struct access_traits<T&> {
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typedef T& const_type;
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typedef T& non_const_type;
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typedef T& parameter_type;
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// get function for non-const cons-lists, returns a reference to the element
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template<int N, class HT, class TT>
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inline typename access_traits<
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typename element<N, cons<HT, TT> >::type
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get(cons<HT, TT>& c BOOST_APPEND_EXPLICIT_TEMPLATE_NON_TYPE(int, N)) {
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typedef BOOST_DEDUCED_TYPENAME detail::drop_front<N>::BOOST_NESTED_TEMPLATE
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apply<cons<HT, TT> > impl;
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typedef BOOST_DEDUCED_TYPENAME impl::type cons_element;
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return const_cast<cons_element&>(impl::call(c)).head;
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// get function for const cons-lists, returns a const reference to
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// the element. If the element is a reference, returns the reference
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// as such (that is, can return a non-const reference)
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template<int N, class HT, class TT>
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inline typename access_traits<
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typename element<N, cons<HT, TT> >::type
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get(const cons<HT, TT>& c BOOST_APPEND_EXPLICIT_TEMPLATE_NON_TYPE(int, N)) {
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typedef BOOST_DEDUCED_TYPENAME detail::drop_front<N>::BOOST_NESTED_TEMPLATE
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apply<cons<HT, TT> > impl;
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typedef BOOST_DEDUCED_TYPENAME impl::type cons_element;
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return impl::call(c).head;
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// -- the cons template --------------------------------------------------
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// These helper templates wrap void types and plain function types.
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// The reationale is to allow one to write tuple types with those types
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// as elements, even though it is not possible to instantiate such object.
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// E.g: typedef tuple<void> some_type; // ok
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// but: some_type x; // fails
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template <class T> class non_storeable_type {
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non_storeable_type();
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template <class T> struct wrap_non_storeable_type {
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::boost::is_function<T>::value, non_storeable_type<T>, T
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template <> struct wrap_non_storeable_type<void> {
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typedef non_storeable_type<void> type;
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template <class HT, class TT>
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typedef HT head_type;
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typedef TT tail_type;
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detail::wrap_non_storeable_type<head_type>::type stored_head_type;
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stored_head_type head;
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typename access_traits<stored_head_type>::non_const_type
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get_head() { return head; }
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typename access_traits<tail_type>::non_const_type
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get_tail() { return tail; }
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typename access_traits<stored_head_type>::const_type
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get_head() const { return head; }
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typename access_traits<tail_type>::const_type
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get_tail() const { return tail; }
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cons() : head(), tail() {}
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// cons() : head(detail::default_arg<HT>::f()), tail() {}
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// the argument for head is not strictly needed, but it prevents
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// array type elements. This is good, since array type elements
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// cannot be supported properly in any case (no assignment,
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// copy works only if the tails are exactly the same type, ...)
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cons(typename access_traits<stored_head_type>::parameter_type h,
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: head (h), tail(t) {}
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template <class T1, class T2, class T3, class T4, class T5,
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class T6, class T7, class T8, class T9, class T10>
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cons( T1& t1, T2& t2, T3& t3, T4& t4, T5& t5,
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T6& t6, T7& t7, T8& t8, T9& t9, T10& t10 )
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tail (t2, t3, t4, t5, t6, t7, t8, t9, t10, detail::cnull())
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template <class T2, class T3, class T4, class T5,
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class T6, class T7, class T8, class T9, class T10>
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cons( const null_type& /*t1*/, T2& t2, T3& t3, T4& t4, T5& t5,
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T6& t6, T7& t7, T8& t8, T9& t9, T10& t10 )
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tail (t2, t3, t4, t5, t6, t7, t8, t9, t10, detail::cnull())
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template <class HT2, class TT2>
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cons( const cons<HT2, TT2>& u ) : head(u.head), tail(u.tail) {}
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template <class HT2, class TT2>
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cons& operator=( const cons<HT2, TT2>& u ) {
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head=u.head; tail=u.tail; return *this;
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// must define assignment operator explicitly, implicit version is
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// illformed if HT is a reference (12.8. (12))
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cons& operator=(const cons& u) {
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head = u.head; tail = u.tail; return *this;
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template <class T1, class T2>
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cons& operator=( const std::pair<T1, T2>& u ) {
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BOOST_STATIC_ASSERT(length<cons>::value == 2); // check length = 2
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head = u.first; tail.head = u.second; return *this;
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// get member functions (non-const and const)
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typename access_traits<
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typename element<N, cons<HT, TT> >::type
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return boost::tuples::get<N>(*this); // delegate to non-member get
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typename access_traits<
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typename element<N, cons<HT, TT> >::type
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return boost::tuples::get<N>(*this); // delegate to non-member get
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struct cons<HT, null_type> {
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typedef HT head_type;
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typedef null_type tail_type;
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typedef cons<HT, null_type> self_type;
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detail::wrap_non_storeable_type<head_type>::type stored_head_type;
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stored_head_type head;
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typename access_traits<stored_head_type>::non_const_type
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get_head() { return head; }
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null_type get_tail() { return null_type(); }
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typename access_traits<stored_head_type>::const_type
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get_head() const { return head; }
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const null_type get_tail() const { return null_type(); }
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// cons() : head(detail::default_arg<HT>::f()) {}
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cons(typename access_traits<stored_head_type>::parameter_type h,
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const null_type& = null_type())
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cons(T1& t1, const null_type&, const null_type&, const null_type&,
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const null_type&, const null_type&, const null_type&,
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const null_type&, const null_type&, const null_type&)
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cons(const null_type&,
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const null_type&, const null_type&, const null_type&,
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const null_type&, const null_type&, const null_type&,
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const null_type&, const null_type&, const null_type&)
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cons( const cons<HT2, null_type>& u ) : head(u.head) {}
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cons& operator=(const cons<HT2, null_type>& u )
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{ head = u.head; return *this; }
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// must define assignment operator explicitely, implicit version
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// is illformed if HT is a reference
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cons& operator=(const cons& u) { head = u.head; return *this; }
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typename access_traits<
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typename element<N, self_type>::type
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get(BOOST_EXPLICIT_TEMPLATE_NON_TYPE(int, N)) {
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return boost::tuples::get<N>(*this);
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typename access_traits<
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typename element<N, self_type>::type
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get(BOOST_EXPLICIT_TEMPLATE_NON_TYPE(int, N)) const {
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return boost::tuples::get<N>(*this);
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// templates for finding out the length of the tuple -------------------
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BOOST_STATIC_CONSTANT(int, value = 1 + length<typename T::tail_type>::value);
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struct length<tuple<> > {
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BOOST_STATIC_CONSTANT(int, value = 0);
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struct length<tuple<> const> {
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BOOST_STATIC_CONSTANT(int, value = 0);
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struct length<null_type> {
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BOOST_STATIC_CONSTANT(int, value = 0);
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struct length<null_type const> {
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BOOST_STATIC_CONSTANT(int, value = 0);
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// Tuple to cons mapper --------------------------------------------------
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template <class T0, class T1, class T2, class T3, class T4,
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class T5, class T6, class T7, class T8, class T9>
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struct map_tuple_to_cons
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typename map_tuple_to_cons<T1, T2, T3, T4, T5,
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T6, T7, T8, T9, null_type>::type
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// The empty tuple is a null_type
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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>
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typedef null_type type;
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// -------------------------------------------------------------------
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// -- tuple ------------------------------------------------------
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template <class T0, class T1, class T2, class T3, class T4,
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class T5, class T6, class T7, class T8, class T9>
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public detail::map_tuple_to_cons<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::type
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detail::map_tuple_to_cons<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::type inherited;
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typedef typename inherited::head_type head_type;
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typedef typename inherited::tail_type tail_type;
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// access_traits<T>::parameter_type takes non-reference types as const T&
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tuple(typename access_traits<T0>::parameter_type t0)
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: inherited(t0, detail::cnull(), detail::cnull(), detail::cnull(),
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detail::cnull(), detail::cnull(), detail::cnull(),
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detail::cnull(), detail::cnull(), detail::cnull()) {}
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tuple(typename access_traits<T0>::parameter_type t0,
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typename access_traits<T1>::parameter_type t1)
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: inherited(t0, t1, detail::cnull(), detail::cnull(),
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detail::cnull(), detail::cnull(), detail::cnull(),
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detail::cnull(), detail::cnull(), detail::cnull()) {}
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tuple(typename access_traits<T0>::parameter_type t0,
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typename access_traits<T1>::parameter_type t1,
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typename access_traits<T2>::parameter_type t2)
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: inherited(t0, t1, t2, detail::cnull(), detail::cnull(),
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detail::cnull(), detail::cnull(), detail::cnull(),
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detail::cnull(), detail::cnull()) {}
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tuple(typename access_traits<T0>::parameter_type t0,
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typename access_traits<T1>::parameter_type t1,
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typename access_traits<T2>::parameter_type t2,
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typename access_traits<T3>::parameter_type t3)
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: inherited(t0, t1, t2, t3, detail::cnull(), detail::cnull(),
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detail::cnull(), detail::cnull(), detail::cnull(),
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tuple(typename access_traits<T0>::parameter_type t0,
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typename access_traits<T1>::parameter_type t1,
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typename access_traits<T2>::parameter_type t2,
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typename access_traits<T3>::parameter_type t3,
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typename access_traits<T4>::parameter_type t4)
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: inherited(t0, t1, t2, t3, t4, detail::cnull(), detail::cnull(),
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detail::cnull(), detail::cnull(), detail::cnull()) {}
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tuple(typename access_traits<T0>::parameter_type t0,
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typename access_traits<T1>::parameter_type t1,
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typename access_traits<T2>::parameter_type t2,
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typename access_traits<T3>::parameter_type t3,
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typename access_traits<T4>::parameter_type t4,
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typename access_traits<T5>::parameter_type t5)
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: inherited(t0, t1, t2, t3, t4, t5, detail::cnull(), detail::cnull(),
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detail::cnull(), detail::cnull()) {}
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tuple(typename access_traits<T0>::parameter_type t0,
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typename access_traits<T1>::parameter_type t1,
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typename access_traits<T2>::parameter_type t2,
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typename access_traits<T3>::parameter_type t3,
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typename access_traits<T4>::parameter_type t4,
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typename access_traits<T5>::parameter_type t5,
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typename access_traits<T6>::parameter_type t6)
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: inherited(t0, t1, t2, t3, t4, t5, t6, detail::cnull(),
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detail::cnull(), detail::cnull()) {}
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tuple(typename access_traits<T0>::parameter_type t0,
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typename access_traits<T1>::parameter_type t1,
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typename access_traits<T2>::parameter_type t2,
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typename access_traits<T3>::parameter_type t3,
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typename access_traits<T4>::parameter_type t4,
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typename access_traits<T5>::parameter_type t5,
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typename access_traits<T6>::parameter_type t6,
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typename access_traits<T7>::parameter_type t7)
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: inherited(t0, t1, t2, t3, t4, t5, t6, t7, detail::cnull(),
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tuple(typename access_traits<T0>::parameter_type t0,
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typename access_traits<T1>::parameter_type t1,
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typename access_traits<T2>::parameter_type t2,
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typename access_traits<T3>::parameter_type t3,
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typename access_traits<T4>::parameter_type t4,
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typename access_traits<T5>::parameter_type t5,
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typename access_traits<T6>::parameter_type t6,
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typename access_traits<T7>::parameter_type t7,
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typename access_traits<T8>::parameter_type t8)
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: inherited(t0, t1, t2, t3, t4, t5, t6, t7, t8, detail::cnull()) {}
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tuple(typename access_traits<T0>::parameter_type t0,
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typename access_traits<T1>::parameter_type t1,
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typename access_traits<T2>::parameter_type t2,
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typename access_traits<T3>::parameter_type t3,
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typename access_traits<T4>::parameter_type t4,
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typename access_traits<T5>::parameter_type t5,
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typename access_traits<T6>::parameter_type t6,
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typename access_traits<T7>::parameter_type t7,
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typename access_traits<T8>::parameter_type t8,
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typename access_traits<T9>::parameter_type t9)
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: inherited(t0, t1, t2, t3, t4, t5, t6, t7, t8, t9) {}
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template<class U1, class U2>
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tuple(const cons<U1, U2>& p) : inherited(p) {}
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template <class U1, class U2>
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tuple& operator=(const cons<U1, U2>& k) {
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inherited::operator=(k);
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template <class U1, class U2>
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tuple& operator=(const std::pair<U1, U2>& k) {
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BOOST_STATIC_ASSERT(length<tuple>::value == 2);// check_length = 2
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this->head = k.first;
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this->tail.head = k.second;
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class tuple<null_type, null_type, null_type, null_type, null_type, null_type, null_type, null_type, null_type, null_type> :
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typedef null_type inherited;
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// Swallows any assignment (by Doug Gregor)
603
struct swallow_assign;
604
typedef void (detail::swallow_assign::*ignore_t)();
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struct swallow_assign {
606
swallow_assign(ignore_t(*)(ignore_t)) {}
608
swallow_assign const& operator=(const T&) const {
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} // namespace detail
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// "ignore" allows tuple positions to be ignored when using "tie".
617
inline detail::ignore_t ignore(detail::ignore_t) { return 0; }
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// ---------------------------------------------------------------------------
620
// The call_traits for make_tuple
621
// Honours the reference_wrapper class.
623
// Must be instantiated with plain or const plain types (not with references)
625
// from template<class T> foo(const T& t) : make_tuple_traits<const T>::type
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// from template<class T> foo(T& t) : make_tuple_traits<T>::type
630
// references -> compile_time_error
631
// reference_wrapper<T> -> T&
632
// const reference_wrapper<T> -> T&
633
// array -> const ref array
637
struct make_tuple_traits {
640
// commented away, see below (JJ)
641
// typedef typename IF<
642
// boost::is_function<T>::value,
648
// The is_function test was there originally for plain function types,
649
// which can't be stored as such (we must either store them as references or
650
// pointers). Such a type could be formed if make_tuple was called with a
651
// reference to a function.
652
// But this would mean that a const qualified function type was formed in
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// the make_tuple function and hence make_tuple can't take a function
654
// reference as a parameter, and thus T can't be a function type.
655
// So is_function test was removed.
656
// (14.8.3. says that type deduction fails if a cv-qualified function type
657
// is created. (It only applies for the case of explicitly specifying template
658
// args, though?)) (JJ)
661
struct make_tuple_traits<T&> {
663
detail::generate_error<T&>::
664
do_not_use_with_reference_type error;
667
// Arrays can't be stored as plain types; convert them to references.
668
// All arrays are converted to const. This is because make_tuple takes its
669
// parameters as const T& and thus the knowledge of the potential
670
// non-constness of actual argument is lost.
671
template<class T, int n> struct make_tuple_traits <T[n]> {
672
typedef const T (&type)[n];
675
template<class T, int n>
676
struct make_tuple_traits<const T[n]> {
677
typedef const T (&type)[n];
680
template<class T, int n> struct make_tuple_traits<volatile T[n]> {
681
typedef const volatile T (&type)[n];
684
template<class T, int n>
685
struct make_tuple_traits<const volatile T[n]> {
686
typedef const volatile T (&type)[n];
690
struct make_tuple_traits<reference_wrapper<T> >{
695
struct make_tuple_traits<const reference_wrapper<T> >{
700
struct make_tuple_traits<detail::ignore_t(detail::ignore_t)> {
701
typedef detail::swallow_assign type;
708
// a helper traits to make the make_tuple functions shorter (Vesa Karvonen's
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class T0 = null_type, class T1 = null_type, class T2 = null_type,
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class T3 = null_type, class T4 = null_type, class T5 = null_type,
713
class T6 = null_type, class T7 = null_type, class T8 = null_type,
716
struct make_tuple_mapper {
718
tuple<typename make_tuple_traits<T0>::type,
719
typename make_tuple_traits<T1>::type,
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typename make_tuple_traits<T2>::type,
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typename make_tuple_traits<T3>::type,
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typename make_tuple_traits<T4>::type,
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typename make_tuple_traits<T5>::type,
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typename make_tuple_traits<T6>::type,
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typename make_tuple_traits<T7>::type,
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typename make_tuple_traits<T8>::type,
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typename make_tuple_traits<T9>::type> type;
732
// -make_tuple function templates -----------------------------------
733
inline tuple<> make_tuple() {
738
inline typename detail::make_tuple_mapper<T0>::type
739
make_tuple(const T0& t0) {
740
typedef typename detail::make_tuple_mapper<T0>::type t;
744
template<class T0, class T1>
745
inline typename detail::make_tuple_mapper<T0, T1>::type
746
make_tuple(const T0& t0, const T1& t1) {
747
typedef typename detail::make_tuple_mapper<T0, T1>::type t;
751
template<class T0, class T1, class T2>
752
inline typename detail::make_tuple_mapper<T0, T1, T2>::type
753
make_tuple(const T0& t0, const T1& t1, const T2& t2) {
754
typedef typename detail::make_tuple_mapper<T0, T1, T2>::type t;
755
return t(t0, t1, t2);
758
template<class T0, class T1, class T2, class T3>
759
inline typename detail::make_tuple_mapper<T0, T1, T2, T3>::type
760
make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3) {
761
typedef typename detail::make_tuple_mapper<T0, T1, T2, T3>::type t;
762
return t(t0, t1, t2, t3);
765
template<class T0, class T1, class T2, class T3, class T4>
766
inline typename detail::make_tuple_mapper<T0, T1, T2, T3, T4>::type
767
make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3,
769
typedef typename detail::make_tuple_mapper<T0, T1, T2, T3, T4>::type t;
770
return t(t0, t1, t2, t3, t4);
773
template<class T0, class T1, class T2, class T3, class T4, class T5>
774
inline typename detail::make_tuple_mapper<T0, T1, T2, T3, T4, T5>::type
775
make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3,
776
const T4& t4, const T5& t5) {
777
typedef typename detail::make_tuple_mapper<T0, T1, T2, T3, T4, T5>::type t;
778
return t(t0, t1, t2, t3, t4, t5);
781
template<class T0, class T1, class T2, class T3, class T4, class T5, class T6>
782
inline typename detail::make_tuple_mapper<T0, T1, T2, T3, T4, T5, T6>::type
783
make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3,
784
const T4& t4, const T5& t5, const T6& t6) {
785
typedef typename detail::make_tuple_mapper
786
<T0, T1, T2, T3, T4, T5, T6>::type t;
787
return t(t0, t1, t2, t3, t4, t5, t6);
790
template<class T0, class T1, class T2, class T3, class T4, class T5, class T6,
792
inline typename detail::make_tuple_mapper<T0, T1, T2, T3, T4, T5, T6, T7>::type
793
make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3,
794
const T4& t4, const T5& t5, const T6& t6, const T7& t7) {
795
typedef typename detail::make_tuple_mapper
796
<T0, T1, T2, T3, T4, T5, T6, T7>::type t;
797
return t(t0, t1, t2, t3, t4, t5, t6, t7);
800
template<class T0, class T1, class T2, class T3, class T4, class T5, class T6,
802
inline typename detail::make_tuple_mapper
803
<T0, T1, T2, T3, T4, T5, T6, T7, T8>::type
804
make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3,
805
const T4& t4, const T5& t5, const T6& t6, const T7& t7,
807
typedef typename detail::make_tuple_mapper
808
<T0, T1, T2, T3, T4, T5, T6, T7, T8>::type t;
809
return t(t0, t1, t2, t3, t4, t5, t6, t7, t8);
812
template<class T0, class T1, class T2, class T3, class T4, class T5, class T6,
813
class T7, class T8, class T9>
814
inline typename detail::make_tuple_mapper
815
<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::type
816
make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3,
817
const T4& t4, const T5& t5, const T6& t6, const T7& t7,
818
const T8& t8, const T9& t9) {
819
typedef typename detail::make_tuple_mapper
820
<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::type t;
821
return t(t0, t1, t2, t3, t4, t5, t6, t7, t8, t9);
832
struct tie_traits<ignore_t(ignore_t)> {
833
typedef swallow_assign type;
837
struct tie_traits<void> {
838
typedef null_type type;
842
class T0 = void, class T1 = void, class T2 = void,
843
class T3 = void, class T4 = void, class T5 = void,
844
class T6 = void, class T7 = void, class T8 = void,
849
tuple<typename tie_traits<T0>::type,
850
typename tie_traits<T1>::type,
851
typename tie_traits<T2>::type,
852
typename tie_traits<T3>::type,
853
typename tie_traits<T4>::type,
854
typename tie_traits<T5>::type,
855
typename tie_traits<T6>::type,
856
typename tie_traits<T7>::type,
857
typename tie_traits<T8>::type,
858
typename tie_traits<T9>::type> type;
863
// Tie function templates -------------------------------------------------
865
inline typename detail::tie_mapper<T0>::type
867
typedef typename detail::tie_mapper<T0>::type t;
871
template<class T0, class T1>
872
inline typename detail::tie_mapper<T0, T1>::type
873
tie(T0& t0, T1& t1) {
874
typedef typename detail::tie_mapper<T0, T1>::type t;
878
template<class T0, class T1, class T2>
879
inline typename detail::tie_mapper<T0, T1, T2>::type
880
tie(T0& t0, T1& t1, T2& t2) {
881
typedef typename detail::tie_mapper<T0, T1, T2>::type t;
882
return t(t0, t1, t2);
885
template<class T0, class T1, class T2, class T3>
886
inline typename detail::tie_mapper<T0, T1, T2, T3>::type
887
tie(T0& t0, T1& t1, T2& t2, T3& t3) {
888
typedef typename detail::tie_mapper<T0, T1, T2, T3>::type t;
889
return t(t0, t1, t2, t3);
892
template<class T0, class T1, class T2, class T3, class T4>
893
inline typename detail::tie_mapper<T0, T1, T2, T3, T4>::type
894
tie(T0& t0, T1& t1, T2& t2, T3& t3,
896
typedef typename detail::tie_mapper<T0, T1, T2, T3, T4>::type t;
897
return t(t0, t1, t2, t3, t4);
900
template<class T0, class T1, class T2, class T3, class T4, class T5>
901
inline typename detail::tie_mapper<T0, T1, T2, T3, T4, T5>::type
902
tie(T0& t0, T1& t1, T2& t2, T3& t3,
904
typedef typename detail::tie_mapper<T0, T1, T2, T3, T4, T5>::type t;
905
return t(t0, t1, t2, t3, t4, t5);
908
template<class T0, class T1, class T2, class T3, class T4, class T5, class T6>
909
inline typename detail::tie_mapper<T0, T1, T2, T3, T4, T5, T6>::type
910
tie(T0& t0, T1& t1, T2& t2, T3& t3,
911
T4& t4, T5& t5, T6& t6) {
912
typedef typename detail::tie_mapper
913
<T0, T1, T2, T3, T4, T5, T6>::type t;
914
return t(t0, t1, t2, t3, t4, t5, t6);
917
template<class T0, class T1, class T2, class T3, class T4, class T5, class T6,
919
inline typename detail::tie_mapper<T0, T1, T2, T3, T4, T5, T6, T7>::type
920
tie(T0& t0, T1& t1, T2& t2, T3& t3,
921
T4& t4, T5& t5, T6& t6, T7& t7) {
922
typedef typename detail::tie_mapper
923
<T0, T1, T2, T3, T4, T5, T6, T7>::type t;
924
return t(t0, t1, t2, t3, t4, t5, t6, t7);
927
template<class T0, class T1, class T2, class T3, class T4, class T5, class T6,
929
inline typename detail::tie_mapper
930
<T0, T1, T2, T3, T4, T5, T6, T7, T8>::type
931
tie(T0& t0, T1& t1, T2& t2, T3& t3,
932
T4& t4, T5& t5, T6& t6, T7& t7,
934
typedef typename detail::tie_mapper
935
<T0, T1, T2, T3, T4, T5, T6, T7, T8>::type t;
936
return t(t0, t1, t2, t3, t4, t5, t6, t7, t8);
939
template<class T0, class T1, class T2, class T3, class T4, class T5, class T6,
940
class T7, class T8, class T9>
941
inline typename detail::tie_mapper
942
<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::type
943
tie(T0& t0, T1& t1, T2& t2, T3& t3,
944
T4& t4, T5& t5, T6& t6, T7& t7,
946
typedef typename detail::tie_mapper
947
<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::type t;
948
return t(t0, t1, t2, t3, t4, t5, t6, t7, t8, t9);
951
template <class T0, class T1, class T2, class T3, class T4,
952
class T5, class T6, class T7, class T8, class T9>
953
void swap(tuple<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>& lhs,
954
tuple<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>& rhs);
955
inline void swap(null_type&, null_type&) {}
957
inline void swap(cons<HH, null_type>& lhs, cons<HH, null_type>& rhs) {
958
::boost::swap(lhs.head, rhs.head);
960
template<class HH, class TT>
961
inline void swap(cons<HH, TT>& lhs, cons<HH, TT>& rhs) {
962
::boost::swap(lhs.head, rhs.head);
963
::boost::tuples::swap(lhs.tail, rhs.tail);
965
template <class T0, class T1, class T2, class T3, class T4,
966
class T5, class T6, class T7, class T8, class T9>
967
inline void swap(tuple<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>& lhs,
968
tuple<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>& rhs) {
969
typedef tuple<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9> tuple_type;
970
typedef typename tuple_type::inherited base;
971
::boost::tuples::swap(static_cast<base&>(lhs), static_cast<base&>(rhs));
974
} // end of namespace tuples
975
} // end of namespace boost
978
#endif // BOOST_TUPLE_BASIC_HPP