990 lines
32 KiB
C++
990 lines
32 KiB
C++
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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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//
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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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// Outside help:
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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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// David Abrahams.
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// Revision history:
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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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// such as arrays.
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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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#if BOOST_GCC >= 40700
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wunused-local-typedefs"
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#endif
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namespace boost {
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namespace tuples {
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// -- null_type --------------------------------------------------------
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struct null_type {};
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// a helper function to provide a const null_type type temporary
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namespace detail {
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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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typedef Else RET;
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};
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} // end detail
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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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template <
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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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class T9 = null_type>
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class tuple;
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// tuple_length forward declaration
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template<class T> struct length;
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namespace detail {
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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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template<class T>
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class generate_error;
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template<int N>
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struct drop_front {
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template<class Tuple>
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struct apply {
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typedef BOOST_DEDUCED_TYPENAME drop_front<N-1>::BOOST_NESTED_TEMPLATE
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apply<Tuple> next;
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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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}
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};
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};
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template<>
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struct drop_front<0> {
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template<class Tuple>
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struct apply {
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typedef Tuple type;
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static const type& call(const Tuple& tup) {
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return tup;
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}
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};
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};
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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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struct element
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{
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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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};
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template<int N, class T>
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struct element<N, const T>
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{
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private:
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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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public:
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#if BOOST_WORKAROUND(__BORLANDC__,<0x600)
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typedef const unqualified_type type;
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#else
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typedef BOOST_DEDUCED_TYPENAME boost::add_const<unqualified_type>::type type;
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#endif
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};
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#else // def BOOST_NO_CV_SPECIALIZATIONS
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namespace detail {
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template<int N, class T, bool IsConst>
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struct element_impl
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{
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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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};
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template<int N, class T>
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struct element_impl<N, T, true /* IsConst */>
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{
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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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};
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} // end of namespace detail
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template<int N, class T>
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struct element:
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public detail::element_impl<N, T, ::boost::is_const<T>::value>
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{
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};
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#endif
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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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};
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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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};
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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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>::non_const_type
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get(cons<HT, TT>& c) {
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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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}
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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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>::const_type
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get(const cons<HT, TT>& c) {
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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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return impl::call(c).head;
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}
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// -- the cons template --------------------------------------------------
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namespace detail {
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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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};
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template <class T> struct wrap_non_storeable_type {
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typedef typename IF<
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::boost::is_function<T>::value, non_storeable_type<T>, T
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>::RET type;
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};
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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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};
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} // detail
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template <class HT, class TT>
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struct cons {
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typedef HT head_type;
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typedef TT tail_type;
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typedef typename
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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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tail_type tail;
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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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const tail_type& t)
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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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: head (t1),
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tail (t2, t3, t4, t5, t6, t7, t8, t9, t10, detail::cnull())
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{}
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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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: head (),
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tail (t2, t3, t4, t5, t6, t7, t8, t9, t10, detail::cnull())
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{}
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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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}
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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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}
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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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}
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// get member functions (non-const and const)
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template <int N>
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typename access_traits<
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typename element<N, cons<HT, TT> >::type
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>::non_const_type
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get() {
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return boost::tuples::get<N>(*this); // delegate to non-member get
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}
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template <int N>
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typename access_traits<
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typename element<N, cons<HT, TT> >::type
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>::const_type
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get() const {
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return boost::tuples::get<N>(*this); // delegate to non-member get
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}
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};
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template <class HT>
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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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typedef typename
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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() : head() {}
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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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: head (h) {}
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template<class T1>
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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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: head (t1) {}
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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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: head () {}
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template <class HT2>
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cons( const cons<HT2, null_type>& u ) : head(u.head) {}
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template <class HT2>
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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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template <int N>
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typename access_traits<
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typename element<N, self_type>::type
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>::non_const_type
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get() {
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return boost::tuples::get<N>(*this);
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}
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template <int N>
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typename access_traits<
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typename element<N, self_type>::type
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>::const_type
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get() const {
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return boost::tuples::get<N>(*this);
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}
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};
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// templates for finding out the length of the tuple -------------------
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template<class T>
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struct length {
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BOOST_STATIC_CONSTANT(int, value = 1 + length<typename T::tail_type>::value);
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};
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template<>
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struct length<tuple<> > {
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BOOST_STATIC_CONSTANT(int, value = 0);
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};
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template<>
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struct length<tuple<> const> {
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BOOST_STATIC_CONSTANT(int, value = 0);
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};
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template<>
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struct length<null_type> {
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BOOST_STATIC_CONSTANT(int, value = 0);
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};
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template<>
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struct length<null_type const> {
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||
|
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
|
||
|
|
||
|
|
||
|
#if BOOST_GCC >= 40700
|
||
|
#pragma GCC diagnostic pop
|
||
|
#endif
|
||
|
|
||
|
|
||
|
#endif // BOOST_TUPLE_BASIC_HPP
|
||
|
|
||
|
|