summaryrefslogtreecommitdiff
path: root/libstdc++-v3/include/std/tuple
diff options
context:
space:
mode:
Diffstat (limited to 'libstdc++-v3/include/std/tuple')
-rw-r--r--libstdc++-v3/include/std/tuple808
1 files changed, 808 insertions, 0 deletions
diff --git a/libstdc++-v3/include/std/tuple b/libstdc++-v3/include/std/tuple
new file mode 100644
index 000000000..fb452aeb4
--- /dev/null
+++ b/libstdc++-v3/include/std/tuple
@@ -0,0 +1,808 @@
+// <tuple> -*- C++ -*-
+
+// Copyright (C) 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
+
+/** @file include/tuple
+ * This is a Standard C++ Library header.
+ */
+
+#ifndef _GLIBCXX_TUPLE
+#define _GLIBCXX_TUPLE 1
+
+#pragma GCC system_header
+
+#ifndef __GXX_EXPERIMENTAL_CXX0X__
+# include <bits/c++0x_warning.h>
+#else
+
+#include <utility>
+
+namespace std _GLIBCXX_VISIBILITY(default)
+{
+_GLIBCXX_BEGIN_NAMESPACE_VERSION
+
+ // Adds a const reference to a non-reference type.
+ template<typename _Tp>
+ struct __add_c_ref
+ { typedef const _Tp& type; };
+
+ template<typename _Tp>
+ struct __add_c_ref<_Tp&>
+ { typedef _Tp& type; };
+
+ // Adds a reference to a non-reference type.
+ template<typename _Tp>
+ struct __add_ref
+ { typedef _Tp& type; };
+
+ template<typename _Tp>
+ struct __add_ref<_Tp&>
+ { typedef _Tp& type; };
+
+ template<std::size_t _Idx, typename _Head, bool _IsEmpty>
+ struct _Head_base;
+
+ template<std::size_t _Idx, typename _Head>
+ struct _Head_base<_Idx, _Head, true>
+ : public _Head
+ {
+ constexpr _Head_base()
+ : _Head() { }
+
+ constexpr _Head_base(const _Head& __h)
+ : _Head(__h) { }
+
+ template<typename _UHead>
+ _Head_base(_UHead&& __h)
+ : _Head(std::forward<_UHead>(__h)) { }
+
+ _Head& _M_head() { return *this; }
+ const _Head& _M_head() const { return *this; }
+
+ void
+ _M_swap_impl(_Head& __h)
+ {
+ using std::swap;
+ swap(__h, _M_head());
+ }
+ };
+
+ template<std::size_t _Idx, typename _Head>
+ struct _Head_base<_Idx, _Head, false>
+ {
+ constexpr _Head_base()
+ : _M_head_impl() { }
+
+ constexpr _Head_base(const _Head& __h)
+ : _M_head_impl(__h) { }
+
+ template<typename _UHead>
+ _Head_base(_UHead&& __h)
+ : _M_head_impl(std::forward<_UHead>(__h)) { }
+
+ _Head& _M_head() { return _M_head_impl; }
+ const _Head& _M_head() const { return _M_head_impl; }
+
+ void
+ _M_swap_impl(_Head& __h)
+ {
+ using std::swap;
+ swap(__h, _M_head());
+ }
+
+ _Head _M_head_impl;
+ };
+
+ /**
+ * Contains the actual implementation of the @c tuple template, stored
+ * as a recursive inheritance hierarchy from the first element (most
+ * derived class) to the last (least derived class). The @c Idx
+ * parameter gives the 0-based index of the element stored at this
+ * point in the hierarchy; we use it to implement a constant-time
+ * get() operation.
+ */
+ template<std::size_t _Idx, typename... _Elements>
+ struct _Tuple_impl;
+
+ /**
+ * Zero-element tuple implementation. This is the basis case for the
+ * inheritance recursion.
+ */
+ template<std::size_t _Idx>
+ struct _Tuple_impl<_Idx>
+ {
+ protected:
+ void _M_swap_impl(_Tuple_impl&) { /* no-op */ }
+ };
+
+ /**
+ * Recursive tuple implementation. Here we store the @c Head element
+ * and derive from a @c Tuple_impl containing the remaining elements
+ * (which contains the @c Tail).
+ */
+ template<std::size_t _Idx, typename _Head, typename... _Tail>
+ struct _Tuple_impl<_Idx, _Head, _Tail...>
+ : public _Tuple_impl<_Idx + 1, _Tail...>,
+ private _Head_base<_Idx, _Head, std::is_empty<_Head>::value>
+ {
+ typedef _Tuple_impl<_Idx + 1, _Tail...> _Inherited;
+ typedef _Head_base<_Idx, _Head, std::is_empty<_Head>::value> _Base;
+
+ _Head& _M_head() { return _Base::_M_head(); }
+ const _Head& _M_head() const { return _Base::_M_head(); }
+
+ _Inherited& _M_tail() { return *this; }
+ const _Inherited& _M_tail() const { return *this; }
+
+ constexpr _Tuple_impl()
+ : _Inherited(), _Base() { }
+
+ explicit
+ constexpr _Tuple_impl(const _Head& __head, const _Tail&... __tail)
+ : _Inherited(__tail...), _Base(__head) { }
+
+ template<typename _UHead, typename... _UTail>
+ explicit
+ _Tuple_impl(_UHead&& __head, _UTail&&... __tail)
+ : _Inherited(std::forward<_UTail>(__tail)...),
+ _Base(std::forward<_UHead>(__head)) { }
+
+ constexpr _Tuple_impl(const _Tuple_impl&) = default;
+
+ _Tuple_impl(_Tuple_impl&& __in)
+ : _Inherited(std::move(__in._M_tail())),
+ _Base(std::forward<_Head>(__in._M_head())) { }
+
+ template<typename... _UElements>
+ _Tuple_impl(const _Tuple_impl<_Idx, _UElements...>& __in)
+ : _Inherited(__in._M_tail()), _Base(__in._M_head()) { }
+
+ template<typename _UHead, typename... _UTails>
+ _Tuple_impl(_Tuple_impl<_Idx, _UHead, _UTails...>&& __in)
+ : _Inherited(std::move(__in._M_tail())),
+ _Base(std::forward<_UHead>(__in._M_head())) { }
+
+ _Tuple_impl&
+ operator=(const _Tuple_impl& __in)
+ {
+ _M_head() = __in._M_head();
+ _M_tail() = __in._M_tail();
+ return *this;
+ }
+
+ _Tuple_impl&
+ operator=(_Tuple_impl&& __in)
+ {
+ _M_head() = std::forward<_Head>(__in._M_head());
+ _M_tail() = std::move(__in._M_tail());
+ return *this;
+ }
+
+ template<typename... _UElements>
+ _Tuple_impl&
+ operator=(const _Tuple_impl<_Idx, _UElements...>& __in)
+ {
+ _M_head() = __in._M_head();
+ _M_tail() = __in._M_tail();
+ return *this;
+ }
+
+ template<typename _UHead, typename... _UTails>
+ _Tuple_impl&
+ operator=(_Tuple_impl<_Idx, _UHead, _UTails...>&& __in)
+ {
+ _M_head() = std::forward<_UHead>(__in._M_head());
+ _M_tail() = std::move(__in._M_tail());
+ return *this;
+ }
+
+ protected:
+ void
+ _M_swap_impl(_Tuple_impl& __in)
+ {
+ _Base::_M_swap_impl(__in._M_head());
+ _Inherited::_M_swap_impl(__in._M_tail());
+ }
+ };
+
+ /// tuple
+ template<typename... _Elements>
+ class tuple : public _Tuple_impl<0, _Elements...>
+ {
+ typedef _Tuple_impl<0, _Elements...> _Inherited;
+
+ public:
+ constexpr tuple()
+ : _Inherited() { }
+
+ explicit
+ constexpr tuple(const _Elements&... __elements)
+ : _Inherited(__elements...) { }
+
+ template<typename... _UElements, typename = typename
+ std::enable_if<sizeof...(_UElements)
+ == sizeof...(_Elements)>::type>
+ explicit
+ tuple(_UElements&&... __elements)
+ : _Inherited(std::forward<_UElements>(__elements)...) { }
+
+ constexpr tuple(const tuple&) = default;
+
+ tuple(tuple&& __in)
+ : _Inherited(static_cast<_Inherited&&>(__in)) { }
+
+ template<typename... _UElements, typename = typename
+ std::enable_if<sizeof...(_UElements)
+ == sizeof...(_Elements)>::type>
+ tuple(const tuple<_UElements...>& __in)
+ : _Inherited(static_cast<const _Tuple_impl<0, _UElements...>&>(__in))
+ { }
+
+ template<typename... _UElements, typename = typename
+ std::enable_if<sizeof...(_UElements)
+ == sizeof...(_Elements)>::type>
+ tuple(tuple<_UElements...>&& __in)
+ : _Inherited(static_cast<_Tuple_impl<0, _UElements...>&&>(__in)) { }
+
+ tuple&
+ operator=(const tuple& __in)
+ {
+ static_cast<_Inherited&>(*this) = __in;
+ return *this;
+ }
+
+ tuple&
+ operator=(tuple&& __in)
+ {
+ static_cast<_Inherited&>(*this) = std::move(__in);
+ return *this;
+ }
+
+ template<typename... _UElements, typename = typename
+ std::enable_if<sizeof...(_UElements)
+ == sizeof...(_Elements)>::type>
+ tuple&
+ operator=(const tuple<_UElements...>& __in)
+ {
+ static_cast<_Inherited&>(*this) = __in;
+ return *this;
+ }
+
+ template<typename... _UElements, typename = typename
+ std::enable_if<sizeof...(_UElements)
+ == sizeof...(_Elements)>::type>
+ tuple&
+ operator=(tuple<_UElements...>&& __in)
+ {
+ static_cast<_Inherited&>(*this) = std::move(__in);
+ return *this;
+ }
+
+ void
+ swap(tuple& __in)
+ { _Inherited::_M_swap_impl(__in); }
+ };
+
+ template<>
+ class tuple<>
+ {
+ public:
+ void swap(tuple&) { /* no-op */ }
+ };
+
+ /// tuple (2-element), with construction and assignment from a pair.
+ template<typename _T1, typename _T2>
+ class tuple<_T1, _T2> : public _Tuple_impl<0, _T1, _T2>
+ {
+ typedef _Tuple_impl<0, _T1, _T2> _Inherited;
+
+ public:
+ constexpr tuple()
+ : _Inherited() { }
+
+ explicit
+ constexpr tuple(const _T1& __a1, const _T2& __a2)
+ : _Inherited(__a1, __a2) { }
+
+ template<typename _U1, typename _U2>
+ explicit
+ tuple(_U1&& __a1, _U2&& __a2)
+ : _Inherited(std::forward<_U1>(__a1), std::forward<_U2>(__a2)) { }
+
+ constexpr tuple(const tuple&) = default;
+
+ tuple(tuple&& __in)
+ : _Inherited(static_cast<_Inherited&&>(__in)) { }
+
+ template<typename _U1, typename _U2>
+ tuple(const tuple<_U1, _U2>& __in)
+ : _Inherited(static_cast<const _Tuple_impl<0, _U1, _U2>&>(__in)) { }
+
+ template<typename _U1, typename _U2>
+ tuple(tuple<_U1, _U2>&& __in)
+ : _Inherited(static_cast<_Tuple_impl<0, _U1, _U2>&&>(__in)) { }
+
+ template<typename _U1, typename _U2>
+ tuple(const pair<_U1, _U2>& __in)
+ : _Inherited(__in.first, __in.second) { }
+
+ template<typename _U1, typename _U2>
+ tuple(pair<_U1, _U2>&& __in)
+ : _Inherited(std::forward<_U1>(__in.first),
+ std::forward<_U2>(__in.second)) { }
+
+ tuple&
+ operator=(const tuple& __in)
+ {
+ static_cast<_Inherited&>(*this) = __in;
+ return *this;
+ }
+
+ tuple&
+ operator=(tuple&& __in)
+ {
+ static_cast<_Inherited&>(*this) = std::move(__in);
+ return *this;
+ }
+
+ template<typename _U1, typename _U2>
+ tuple&
+ operator=(const tuple<_U1, _U2>& __in)
+ {
+ static_cast<_Inherited&>(*this) = __in;
+ return *this;
+ }
+
+ template<typename _U1, typename _U2>
+ tuple&
+ operator=(tuple<_U1, _U2>&& __in)
+ {
+ static_cast<_Inherited&>(*this) = std::move(__in);
+ return *this;
+ }
+
+ template<typename _U1, typename _U2>
+ tuple&
+ operator=(const pair<_U1, _U2>& __in)
+ {
+ this->_M_head() = __in.first;
+ this->_M_tail()._M_head() = __in.second;
+ return *this;
+ }
+
+ template<typename _U1, typename _U2>
+ tuple&
+ operator=(pair<_U1, _U2>&& __in)
+ {
+ this->_M_head() = std::forward<_U1>(__in.first);
+ this->_M_tail()._M_head() = std::forward<_U2>(__in.second);
+ return *this;
+ }
+
+ void
+ swap(tuple& __in)
+ {
+ using std::swap;
+ swap(this->_M_head(), __in._M_head());
+ swap(this->_M_tail()._M_head(), __in._M_tail()._M_head());
+ }
+ };
+
+ /// tuple (1-element).
+ template<typename _T1>
+ class tuple<_T1> : public _Tuple_impl<0, _T1>
+ {
+ typedef _Tuple_impl<0, _T1> _Inherited;
+
+ public:
+ constexpr tuple()
+ : _Inherited() { }
+
+ explicit
+ constexpr tuple(const _T1& __a1)
+ : _Inherited(__a1) { }
+
+ template<typename _U1, typename = typename
+ std::enable_if<std::is_convertible<_U1, _T1>::value>::type>
+ explicit
+ tuple(_U1&& __a1)
+ : _Inherited(std::forward<_U1>(__a1)) { }
+
+ constexpr tuple(const tuple&) = default;
+
+ tuple(tuple&& __in)
+ : _Inherited(static_cast<_Inherited&&>(__in)) { }
+
+ template<typename _U1>
+ tuple(const tuple<_U1>& __in)
+ : _Inherited(static_cast<const _Tuple_impl<0, _U1>&>(__in)) { }
+
+ template<typename _U1>
+ tuple(tuple<_U1>&& __in)
+ : _Inherited(static_cast<_Tuple_impl<0, _U1>&&>(__in)) { }
+
+ tuple&
+ operator=(const tuple& __in)
+ {
+ static_cast<_Inherited&>(*this) = __in;
+ return *this;
+ }
+
+ tuple&
+ operator=(tuple&& __in)
+ {
+ static_cast<_Inherited&>(*this) = std::move(__in);
+ return *this;
+ }
+
+ template<typename _U1>
+ tuple&
+ operator=(const tuple<_U1>& __in)
+ {
+ static_cast<_Inherited&>(*this) = __in;
+ return *this;
+ }
+
+ template<typename _U1>
+ tuple&
+ operator=(tuple<_U1>&& __in)
+ {
+ static_cast<_Inherited&>(*this) = std::move(__in);
+ return *this;
+ }
+
+ void
+ swap(tuple& __in)
+ { _Inherited::_M_swap_impl(__in); }
+ };
+
+
+ /// Gives the type of the ith element of a given tuple type.
+ template<std::size_t __i, typename _Tp>
+ struct tuple_element;
+
+ /**
+ * Recursive case for tuple_element: strip off the first element in
+ * the tuple and retrieve the (i-1)th element of the remaining tuple.
+ */
+ template<std::size_t __i, typename _Head, typename... _Tail>
+ struct tuple_element<__i, tuple<_Head, _Tail...> >
+ : tuple_element<__i - 1, tuple<_Tail...> > { };
+
+ /**
+ * Basis case for tuple_element: The first element is the one we're seeking.
+ */
+ template<typename _Head, typename... _Tail>
+ struct tuple_element<0, tuple<_Head, _Tail...> >
+ {
+ typedef _Head type;
+ };
+
+ /// Finds the size of a given tuple type.
+ template<typename _Tp>
+ struct tuple_size;
+
+ /// class tuple_size
+ template<typename... _Elements>
+ struct tuple_size<tuple<_Elements...> >
+ {
+ static const std::size_t value = sizeof...(_Elements);
+ };
+
+ template<typename... _Elements>
+ const std::size_t tuple_size<tuple<_Elements...> >::value;
+
+ template<std::size_t __i, typename _Head, typename... _Tail>
+ inline typename __add_ref<_Head>::type
+ __get_helper(_Tuple_impl<__i, _Head, _Tail...>& __t)
+ { return __t._M_head(); }
+
+ template<std::size_t __i, typename _Head, typename... _Tail>
+ inline typename __add_c_ref<_Head>::type
+ __get_helper(const _Tuple_impl<__i, _Head, _Tail...>& __t)
+ { return __t._M_head(); }
+
+ // Return a reference (const reference) to the ith element of a tuple.
+ // Any const or non-const ref elements are returned with their original type.
+ template<std::size_t __i, typename... _Elements>
+ inline typename __add_ref<
+ typename tuple_element<__i, tuple<_Elements...> >::type
+ >::type
+ get(tuple<_Elements...>& __t)
+ { return __get_helper<__i>(__t); }
+
+ template<std::size_t __i, typename... _Elements>
+ inline typename __add_c_ref<
+ typename tuple_element<__i, tuple<_Elements...> >::type
+ >::type
+ get(const tuple<_Elements...>& __t)
+ { return __get_helper<__i>(__t); }
+
+ // This class helps construct the various comparison operations on tuples
+ template<std::size_t __check_equal_size, std::size_t __i, std::size_t __j,
+ typename _Tp, typename _Up>
+ struct __tuple_compare;
+
+ template<std::size_t __i, std::size_t __j, typename _Tp, typename _Up>
+ struct __tuple_compare<0, __i, __j, _Tp, _Up>
+ {
+ static bool __eq(const _Tp& __t, const _Up& __u)
+ {
+ return (get<__i>(__t) == get<__i>(__u) &&
+ __tuple_compare<0, __i + 1, __j, _Tp, _Up>::__eq(__t, __u));
+ }
+
+ static bool __less(const _Tp& __t, const _Up& __u)
+ {
+ return ((get<__i>(__t) < get<__i>(__u))
+ || !(get<__i>(__u) < get<__i>(__t)) &&
+ __tuple_compare<0, __i + 1, __j, _Tp, _Up>::__less(__t, __u));
+ }
+ };
+
+ template<std::size_t __i, typename _Tp, typename _Up>
+ struct __tuple_compare<0, __i, __i, _Tp, _Up>
+ {
+ static bool __eq(const _Tp&, const _Up&)
+ { return true; }
+
+ static bool __less(const _Tp&, const _Up&)
+ { return false; }
+ };
+
+ template<typename... _TElements, typename... _UElements>
+ bool
+ operator==(const tuple<_TElements...>& __t,
+ const tuple<_UElements...>& __u)
+ {
+ typedef tuple<_TElements...> _Tp;
+ typedef tuple<_UElements...> _Up;
+ return (__tuple_compare<tuple_size<_Tp>::value - tuple_size<_Up>::value,
+ 0, tuple_size<_Tp>::value, _Tp, _Up>::__eq(__t, __u));
+ }
+
+ template<typename... _TElements, typename... _UElements>
+ bool
+ operator<(const tuple<_TElements...>& __t,
+ const tuple<_UElements...>& __u)
+ {
+ typedef tuple<_TElements...> _Tp;
+ typedef tuple<_UElements...> _Up;
+ return (__tuple_compare<tuple_size<_Tp>::value - tuple_size<_Up>::value,
+ 0, tuple_size<_Tp>::value, _Tp, _Up>::__less(__t, __u));
+ }
+
+ template<typename... _TElements, typename... _UElements>
+ inline bool
+ operator!=(const tuple<_TElements...>& __t,
+ const tuple<_UElements...>& __u)
+ { return !(__t == __u); }
+
+ template<typename... _TElements, typename... _UElements>
+ inline bool
+ operator>(const tuple<_TElements...>& __t,
+ const tuple<_UElements...>& __u)
+ { return __u < __t; }
+
+ template<typename... _TElements, typename... _UElements>
+ inline bool
+ operator<=(const tuple<_TElements...>& __t,
+ const tuple<_UElements...>& __u)
+ { return !(__u < __t); }
+
+ template<typename... _TElements, typename... _UElements>
+ inline bool
+ operator>=(const tuple<_TElements...>& __t,
+ const tuple<_UElements...>& __u)
+ { return !(__t < __u); }
+
+ // NB: DR 705.
+ template<typename... _Elements>
+ inline tuple<typename __decay_and_strip<_Elements>::__type...>
+ make_tuple(_Elements&&... __args)
+ {
+ typedef tuple<typename __decay_and_strip<_Elements>::__type...>
+ __result_type;
+ return __result_type(std::forward<_Elements>(__args)...);
+ }
+
+ template<typename... _Elements>
+ inline tuple<_Elements&&...>
+ forward_as_tuple(_Elements&&... __args)
+ { return tuple<_Elements&&...>(std::forward<_Elements>(__args)...); }
+
+ template<std::size_t...> struct __index_holder { };
+
+ template<std::size_t __i, typename _IdxHolder, typename... _Elements>
+ struct __index_holder_impl;
+
+ template<std::size_t __i, std::size_t... _Indexes, typename _IdxHolder,
+ typename... _Elements>
+ struct __index_holder_impl<__i, __index_holder<_Indexes...>,
+ _IdxHolder, _Elements...>
+ {
+ typedef typename __index_holder_impl<__i + 1,
+ __index_holder<_Indexes..., __i>,
+ _Elements...>::type type;
+ };
+
+ template<std::size_t __i, std::size_t... _Indexes>
+ struct __index_holder_impl<__i, __index_holder<_Indexes...> >
+ { typedef __index_holder<_Indexes...> type; };
+
+ template<typename... _Elements>
+ struct __make_index_holder
+ : __index_holder_impl<0, __index_holder<>, _Elements...> { };
+
+ template<typename... _TElements, std::size_t... _TIdx,
+ typename... _UElements, std::size_t... _UIdx>
+ inline tuple<_TElements..., _UElements...>
+ __tuple_cat_helper(const tuple<_TElements...>& __t,
+ const __index_holder<_TIdx...>&,
+ const tuple<_UElements...>& __u,
+ const __index_holder<_UIdx...>&)
+ { return tuple<_TElements..., _UElements...>(get<_TIdx>(__t)...,
+ get<_UIdx>(__u)...); }
+
+ template<typename... _TElements, std::size_t... _TIdx,
+ typename... _UElements, std::size_t... _UIdx>
+ inline tuple<_TElements..., _UElements...>
+ __tuple_cat_helper(tuple<_TElements...>&& __t,
+ const __index_holder<_TIdx...>&,
+ const tuple<_UElements...>& __u,
+ const __index_holder<_UIdx...>&)
+ { return tuple<_TElements..., _UElements...>
+ (std::forward<_TElements>(get<_TIdx>(__t))..., get<_UIdx>(__u)...); }
+
+ template<typename... _TElements, std::size_t... _TIdx,
+ typename... _UElements, std::size_t... _UIdx>
+ inline tuple<_TElements..., _UElements...>
+ __tuple_cat_helper(const tuple<_TElements...>& __t,
+ const __index_holder<_TIdx...>&,
+ tuple<_UElements...>&& __u,
+ const __index_holder<_UIdx...>&)
+ { return tuple<_TElements..., _UElements...>
+ (get<_TIdx>(__t)..., std::forward<_UElements>(get<_UIdx>(__u))...); }
+
+ template<typename... _TElements, std::size_t... _TIdx,
+ typename... _UElements, std::size_t... _UIdx>
+ inline tuple<_TElements..., _UElements...>
+ __tuple_cat_helper(tuple<_TElements...>&& __t,
+ const __index_holder<_TIdx...>&,
+ tuple<_UElements...>&& __u,
+ const __index_holder<_UIdx...>&)
+ { return tuple<_TElements..., _UElements...>
+ (std::forward<_TElements>(get<_TIdx>(__t))...,
+ std::forward<_UElements>(get<_UIdx>(__u))...); }
+
+ template<typename... _TElements, typename... _UElements>
+ inline tuple<_TElements..., _UElements...>
+ tuple_cat(const tuple<_TElements...>& __t, const tuple<_UElements...>& __u)
+ {
+ return __tuple_cat_helper(__t, typename
+ __make_index_holder<_TElements...>::type(),
+ __u, typename
+ __make_index_holder<_UElements...>::type());
+ }
+
+ template<typename... _TElements, typename... _UElements>
+ inline tuple<_TElements..., _UElements...>
+ tuple_cat(tuple<_TElements...>&& __t, const tuple<_UElements...>& __u)
+ {
+ return __tuple_cat_helper(std::move(__t), typename
+ __make_index_holder<_TElements...>::type(),
+ __u, typename
+ __make_index_holder<_UElements...>::type());
+ }
+
+ template<typename... _TElements, typename... _UElements>
+ inline tuple<_TElements..., _UElements...>
+ tuple_cat(const tuple<_TElements...>& __t, tuple<_UElements...>&& __u)
+ {
+ return __tuple_cat_helper(__t, typename
+ __make_index_holder<_TElements...>::type(),
+ std::move(__u), typename
+ __make_index_holder<_UElements...>::type());
+ }
+
+ template<typename... _TElements, typename... _UElements>
+ inline tuple<_TElements..., _UElements...>
+ tuple_cat(tuple<_TElements...>&& __t, tuple<_UElements...>&& __u)
+ {
+ return __tuple_cat_helper(std::move(__t), typename
+ __make_index_holder<_TElements...>::type(),
+ std::move(__u), typename
+ __make_index_holder<_UElements...>::type());
+ }
+
+ template<typename... _Elements>
+ inline tuple<_Elements&...>
+ tie(_Elements&... __args)
+ { return tuple<_Elements&...>(__args...); }
+
+ template<typename... _Elements>
+ inline void
+ swap(tuple<_Elements...>& __x, tuple<_Elements...>& __y)
+ { __x.swap(__y); }
+
+ // A class (and instance) which can be used in 'tie' when an element
+ // of a tuple is not required
+ struct _Swallow_assign
+ {
+ template<class _Tp>
+ const _Swallow_assign&
+ operator=(const _Tp&) const
+ { return *this; }
+ };
+
+ const _Swallow_assign ignore{};
+
+ /**
+ * Stores a tuple of indices. Used by bind() to extract the elements
+ * in a tuple.
+ */
+ template<int... _Indexes>
+ struct _Index_tuple
+ {
+ typedef _Index_tuple<_Indexes..., sizeof...(_Indexes)> __next;
+ };
+
+ /// Builds an _Index_tuple<0, 1, 2, ..., _Num-1>.
+ template<std::size_t _Num>
+ struct _Build_index_tuple
+ {
+ typedef typename _Build_index_tuple<_Num-1>::__type::__next __type;
+ };
+
+ template<>
+ struct _Build_index_tuple<0>
+ {
+ typedef _Index_tuple<> __type;
+ };
+
+ // See stl_pair.h...
+ template<class _T1, class _T2>
+ template<typename _Tp, typename... _Args>
+ inline _Tp
+ pair<_T1, _T2>::
+ __cons(tuple<_Args...>&& __tuple)
+ {
+ typedef typename _Build_index_tuple<sizeof...(_Args)>::__type
+ _Indexes;
+ return __do_cons<_Tp>(std::move(__tuple), _Indexes());
+ }
+
+ template<class _T1, class _T2>
+ template<typename _Tp, typename... _Args, int... _Indexes>
+ inline _Tp
+ pair<_T1, _T2>::
+ __do_cons(tuple<_Args...>&& __tuple,
+ const _Index_tuple<_Indexes...>&)
+ { return _Tp(std::forward<_Args>(get<_Indexes>(__tuple))...); }
+
+_GLIBCXX_END_NAMESPACE_VERSION
+} // namespace
+
+#endif // __GXX_EXPERIMENTAL_CXX0X__
+
+#endif // _GLIBCXX_TUPLE
generated by cgit v1.2.3 (git 2.25.1) at 2025-02-22 21:29:19 +0000