// <tuple> -*- C++ -*-
-// Copyright (C) 2007, 2008 Free Software Foundation, Inc.
+// 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 2, or (at your option)
+// 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,
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
-// You should have received a copy of the GNU General Public License
-// along with this library; see the file COPYING. If not, write to
-// the Free Software Foundation, 51 Franklin Street, Fifth Floor,
-// Boston, MA 02110-1301, USA.
+// 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.
-// As a special exception, you may use this file as part of a free software
-// library without restriction. Specifically, if other files instantiate
-// templates or use macros or inline functions from this file, or you compile
-// this file and link it with other files to produce an executable, this
-// file does not by itself cause the resulting executable to be covered by
-// the GNU General Public License. This exception does not however
-// invalidate any other reasons why the executable file might be covered by
-// the GNU General Public License.
+// 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.
#pragma GCC system_header
#ifndef __GXX_EXPERIMENTAL_CXX0X__
-# include <c++0x_warning.h>
-#endif
+# include <bits/c++0x_warning.h>
+#else
#include <utility>
+#include <bits/uses_allocator.h>
-namespace std
+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
struct __add_ref<_Tp&>
{ typedef _Tp& type; };
- template<int _Idx, typename _Head, bool _IsEmpty>
+ // Adds an rvalue reference to a non-reference type.
+ template<typename _Tp>
+ struct __add_r_ref
+ { typedef _Tp&& type; };
+
+ template<typename _Tp>
+ struct __add_r_ref<_Tp&>
+ { typedef _Tp& type; };
+
+ template<std::size_t _Idx, typename _Head, bool _IsEmpty>
struct _Head_base;
- template<int _Idx, typename _Head>
+ template<std::size_t _Idx, typename _Head>
struct _Head_base<_Idx, _Head, true>
: public _Head
{
- _Head_base()
+ constexpr _Head_base()
: _Head() { }
- _Head_base(const _Head& __h)
+ constexpr _Head_base(const _Head& __h)
: _Head(__h) { }
+ template<typename _UHead, typename = typename
+ enable_if<!is_convertible<_UHead,
+ __uses_alloc_base>::value>::type>
+ _Head_base(_UHead&& __h)
+ : _Head(std::forward<_UHead>(__h)) { }
+
+ _Head_base(__uses_alloc0)
+ : _Head() { }
+
+ template<typename _Alloc>
+ _Head_base(__uses_alloc1<_Alloc> __a)
+ : _Head(allocator_arg, *__a._M_a) { }
+
+ template<typename _Alloc>
+ _Head_base(__uses_alloc2<_Alloc> __a)
+ : _Head(*__a._M_a) { }
+
template<typename _UHead>
- _Head_base(_UHead&& __h)
- : _Head(std::forward<_UHead>(__h)) { }
+ _Head_base(__uses_alloc0, _UHead&& __uhead)
+ : _Head(std::forward<_UHead>(__uhead)) { }
+
+ template<typename _Alloc, typename _UHead>
+ _Head_base(__uses_alloc1<_Alloc> __a, _UHead&& __uhead)
+ : _Head(allocator_arg, *__a._M_a, std::forward<_UHead>(__uhead)) { }
+
+ template<typename _Alloc, typename _UHead>
+ _Head_base(__uses_alloc2<_Alloc> __a, _UHead&& __uhead)
+ : _Head(std::forward<_UHead>(__uhead), *__a._M_a) { }
- _Head& _M_head() { return *this; }
- const _Head& _M_head() const { return *this; }
+ _Head& _M_head() noexcept { return *this; }
+ const _Head& _M_head() const noexcept { return *this; }
};
- template<int _Idx, typename _Head>
+ template<std::size_t _Idx, typename _Head>
struct _Head_base<_Idx, _Head, false>
{
- _Head_base()
+ constexpr _Head_base()
: _M_head_impl() { }
- _Head_base(const _Head& __h)
+ constexpr _Head_base(const _Head& __h)
: _M_head_impl(__h) { }
+ template<typename _UHead, typename = typename
+ enable_if<!is_convertible<_UHead,
+ __uses_alloc_base>::value>::type>
+ _Head_base(_UHead&& __h)
+ : _M_head_impl(std::forward<_UHead>(__h)) { }
+
+ _Head_base(__uses_alloc0)
+ : _M_head_impl() { }
+
+ template<typename _Alloc>
+ _Head_base(__uses_alloc1<_Alloc> __a)
+ : _M_head_impl(allocator_arg, *__a._M_a) { }
+
+ template<typename _Alloc>
+ _Head_base(__uses_alloc2<_Alloc> __a)
+ : _M_head_impl(*__a._M_a) { }
+
template<typename _UHead>
- _Head_base(_UHead&& __h)
- : _M_head_impl(std::forward<_UHead>(__h)) { }
+ _Head_base(__uses_alloc0, _UHead&& __uhead)
+ : _M_head_impl(std::forward<_UHead>(__uhead)) { }
- _Head& _M_head() { return _M_head_impl; }
- const _Head& _M_head() const { return _M_head_impl; }
+ template<typename _Alloc, typename _UHead>
+ _Head_base(__uses_alloc1<_Alloc> __a, _UHead&& __uhead)
+ : _M_head_impl(allocator_arg, *__a._M_a, std::forward<_UHead>(__uhead))
+ { }
+
+ template<typename _Alloc, typename _UHead>
+ _Head_base(__uses_alloc2<_Alloc> __a, _UHead&& __uhead)
+ : _M_head_impl(std::forward<_UHead>(__uhead), *__a._M_a) { }
+
+ _Head& _M_head() noexcept { return _M_head_impl; }
+ const _Head& _M_head() const noexcept { return _M_head_impl; }
_Head _M_head_impl;
};
* point in the hierarchy; we use it to implement a constant-time
* get() operation.
*/
- template<int _Idx, typename... _Elements>
+ template<std::size_t _Idx, typename... _Elements>
struct _Tuple_impl;
/**
* Zero-element tuple implementation. This is the basis case for the
* inheritance recursion.
*/
- template<int _Idx>
- struct _Tuple_impl<_Idx> { };
+ template<std::size_t _Idx>
+ struct _Tuple_impl<_Idx>
+ {
+ template<std::size_t, typename...> friend class _Tuple_impl;
+
+ _Tuple_impl() = default;
+
+ template<typename _Alloc>
+ _Tuple_impl(allocator_arg_t, const _Alloc&) { }
+
+ template<typename _Alloc>
+ _Tuple_impl(allocator_arg_t, const _Alloc&, const _Tuple_impl&) { }
+
+ template<typename _Alloc>
+ _Tuple_impl(allocator_arg_t, const _Alloc&, _Tuple_impl&&) { }
+
+ protected:
+ void _M_swap(_Tuple_impl&) noexcept { /* 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<int _Idx, typename _Head, typename... _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>
{
+ template<std::size_t, typename...> friend class _Tuple_impl;
+
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(); }
+ _Head& _M_head() noexcept { return _Base::_M_head(); }
+ const _Head& _M_head() const noexcept { return _Base::_M_head(); }
- _Inherited& _M_tail() { return *this; }
- const _Inherited& _M_tail() const { return *this; }
+ _Inherited& _M_tail() noexcept { return *this; }
+ const _Inherited& _M_tail() const noexcept { return *this; }
- _Tuple_impl()
+ constexpr _Tuple_impl()
: _Inherited(), _Base() { }
explicit
- _Tuple_impl(const _Head& __head, const _Tail&... __tail)
+ constexpr _Tuple_impl(const _Head& __head, const _Tail&... __tail)
: _Inherited(__tail...), _Base(__head) { }
- template<typename _UHead, typename... _UTail>
+ template<typename _UHead, typename... _UTail, typename = typename
+ std::enable_if<sizeof...(_Tail)==sizeof...(_UTail)>::type>
explicit
_Tuple_impl(_UHead&& __head, _UTail&&... __tail)
: _Inherited(std::forward<_UTail>(__tail)...),
_Base(std::forward<_UHead>(__head)) { }
- _Tuple_impl(const _Tuple_impl& __in)
- : _Inherited(__in._M_tail()), _Base(__in._M_head()) { }
+ constexpr _Tuple_impl(const _Tuple_impl&) = default;
_Tuple_impl(_Tuple_impl&& __in)
- : _Inherited(std::move<_Inherited&&>(__in._M_tail())),
+ noexcept(std::is_nothrow_move_constructible<_Head>::value
+ && std::is_nothrow_move_constructible<_Inherited>::value)
+ : _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... _UElements>
- _Tuple_impl(_Tuple_impl<_Idx, _UElements...>&& __in)
- : _Inherited(std::move<typename _Tuple_impl<_Idx, _UElements...>::
- _Inherited&&>(__in._M_tail())),
- _Base(std::forward<typename _Tuple_impl<_Idx, _UElements...>::
- _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())) { }
+
+ template<typename _Alloc>
+ _Tuple_impl(allocator_arg_t __tag, const _Alloc& __a)
+ : _Inherited(__tag, __a),
+ _Base(__use_alloc<_Head>(__a)) { }
+
+ template<typename _Alloc>
+ _Tuple_impl(allocator_arg_t __tag, const _Alloc& __a,
+ const _Head& __head, const _Tail&... __tail)
+ : _Inherited(__tag, __a, __tail...),
+ _Base(__use_alloc<_Head, _Alloc, _Head>(__a), __head) { }
+
+ template<typename _Alloc, typename _UHead, typename... _UTail,
+ typename = typename std::enable_if<sizeof...(_Tail)
+ ==sizeof...(_UTail)>::type>
+ _Tuple_impl(allocator_arg_t __tag, const _Alloc& __a,
+ _UHead&& __head, _UTail&&... __tail)
+ : _Inherited(__tag, __a, std::forward<_UTail>(__tail)...),
+ _Base(__use_alloc<_Head, _Alloc, _UHead>(__a),
+ std::forward<_UHead>(__head)) { }
+
+ template<typename _Alloc>
+ _Tuple_impl(allocator_arg_t __tag, const _Alloc& __a,
+ const _Tuple_impl& __in)
+ : _Inherited(__tag, __a, __in._M_tail()),
+ _Base(__use_alloc<_Head, _Alloc, _Head>(__a), __in._M_head()) { }
+
+ template<typename _Alloc>
+ _Tuple_impl(allocator_arg_t __tag, const _Alloc& __a,
+ _Tuple_impl&& __in)
+ noexcept(std::is_nothrow_move_constructible<_Head>::value
+ && std::is_nothrow_move_constructible<_Inherited>::value)
+ : _Inherited(__tag, __a, std::move(__in._M_tail())),
+ _Base(__use_alloc<_Head, _Alloc, _Head>(__a),
+ std::forward<_Head>(__in._M_head())) { }
+
+ template<typename _Alloc, typename... _UElements>
+ _Tuple_impl(allocator_arg_t __tag, const _Alloc& __a,
+ const _Tuple_impl<_Idx, _UElements...>& __in)
+ : _Inherited(__tag, __a, __in._M_tail()),
+ _Base(__use_alloc<_Head, _Alloc, _Head>(__a), __in._M_head()) { }
+
+ template<typename _Alloc, typename _UHead, typename... _UTails>
+ _Tuple_impl(allocator_arg_t __tag, const _Alloc& __a,
+ _Tuple_impl<_Idx, _UHead, _UTails...>&& __in)
+ : _Inherited(__tag, __a, std::move(__in._M_tail())),
+ _Base(__use_alloc<_Head, _Alloc, _UHead>(__a),
+ std::forward<_UHead>(__in._M_head())) { }
_Tuple_impl&
operator=(const _Tuple_impl& __in)
_Tuple_impl&
operator=(_Tuple_impl&& __in)
+ noexcept(std::is_nothrow_move_assignable<_Head>::value
+ && std::is_nothrow_move_assignable<_Inherited>::value)
{
- _M_head() = std::move(__in._M_head());
+ _M_head() = std::forward<_Head>(__in._M_head());
_M_tail() = std::move(__in._M_tail());
return *this;
}
return *this;
}
- template<typename... _UElements>
+ template<typename _UHead, typename... _UTails>
_Tuple_impl&
- operator=(_Tuple_impl<_Idx, _UElements...>&& __in)
+ operator=(_Tuple_impl<_Idx, _UHead, _UTails...>&& __in)
{
- _M_head() = std::move(__in._M_head());
+ _M_head() = std::forward<_UHead>(__in._M_head());
_M_tail() = std::move(__in._M_tail());
return *this;
}
+
+ protected:
+ void
+ _M_swap(_Tuple_impl& __in)
+ noexcept(noexcept(swap(std::declval<_Head&>(),
+ std::declval<_Head&>()))
+ && noexcept(__in._M_tail()._M_swap(__in._M_tail())))
+ {
+ using std::swap;
+ swap(this->_M_head(), __in._M_head());
+ _Inherited::_M_swap(__in._M_tail());
+ }
};
/// tuple
typedef _Tuple_impl<0, _Elements...> _Inherited;
public:
- tuple()
+ constexpr tuple()
: _Inherited() { }
explicit
- tuple(const _Elements&... __elements)
+ constexpr tuple(const _Elements&... __elements)
: _Inherited(__elements...) { }
- template<typename... _UElements>
+ template<typename... _UElements, typename = typename
+ std::enable_if<sizeof...(_UElements)
+ == sizeof...(_Elements)>::type>
explicit
tuple(_UElements&&... __elements)
: _Inherited(std::forward<_UElements>(__elements)...) { }
- tuple(const tuple& __in)
- : _Inherited(static_cast<const _Inherited&>(__in)) { }
+ constexpr tuple(const tuple&) = default;
+ tuple(tuple&&) = default;
- tuple(tuple&& __in)
- : _Inherited(std::move<_Inherited>(__in)) { }
-
- template<typename... _UElements>
+ 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))
- { }
+ : _Inherited(static_cast<const _Tuple_impl<0, _UElements...>&>(__in))
+ { }
- template<typename... _UElements>
+ template<typename... _UElements, typename = typename
+ std::enable_if<sizeof...(_UElements)
+ == sizeof...(_Elements)>::type>
tuple(tuple<_UElements...>&& __in)
- : _Inherited(std::move<_Tuple_impl<0, _UElements...> >(__in)) { }
+ : _Inherited(static_cast<_Tuple_impl<0, _UElements...>&&>(__in)) { }
+
+ // allocator-extended constructors
+
+ template<typename _Alloc>
+ tuple(allocator_arg_t __tag, const _Alloc& __a)
+ : _Inherited(__tag, __a) { }
+
+ template<typename _Alloc>
+ tuple(allocator_arg_t __tag, const _Alloc& __a,
+ const _Elements&... __elements)
+ : _Inherited(__tag, __a, __elements...) { }
+
+ template<typename _Alloc, typename... _UElements, typename = typename
+ std::enable_if<sizeof...(_UElements)
+ == sizeof...(_Elements)>::type>
+ tuple(allocator_arg_t __tag, const _Alloc& __a,
+ _UElements&&... __elements)
+ : _Inherited(__tag, __a, std::forward<_UElements>(__elements)...)
+ { }
+
+ template<typename _Alloc>
+ tuple(allocator_arg_t __tag, const _Alloc& __a, const tuple& __in)
+ : _Inherited(__tag, __a, static_cast<const _Inherited&>(__in)) { }
+
+ template<typename _Alloc>
+ tuple(allocator_arg_t __tag, const _Alloc& __a, tuple&& __in)
+ : _Inherited(__tag, __a, static_cast<_Inherited&&>(__in)) { }
+
+ template<typename _Alloc, typename... _UElements, typename = typename
+ std::enable_if<sizeof...(_UElements)
+ == sizeof...(_Elements)>::type>
+ tuple(allocator_arg_t __tag, const _Alloc& __a,
+ const tuple<_UElements...>& __in)
+ : _Inherited(__tag, __a,
+ static_cast<const _Tuple_impl<0, _UElements...>&>(__in))
+ { }
- // XXX http://gcc.gnu.org/ml/libstdc++/2008-02/msg00047.html
- template<typename... _UElements>
- tuple(tuple<_UElements...>& __in)
- : _Inherited(static_cast<const _Tuple_impl<0, _UElements...>&>(__in))
+ template<typename _Alloc, typename... _UElements, typename = typename
+ std::enable_if<sizeof...(_UElements)
+ == sizeof...(_Elements)>::type>
+ tuple(allocator_arg_t __tag, const _Alloc& __a,
+ tuple<_UElements...>&& __in)
+ : _Inherited(__tag, __a,
+ static_cast<_Tuple_impl<0, _UElements...>&&>(__in))
{ }
tuple&
tuple&
operator=(tuple&& __in)
+ noexcept(std::is_nothrow_move_assignable<_Inherited>::value)
{
static_cast<_Inherited&>(*this) = std::move(__in);
return *this;
}
- template<typename... _UElements>
+ template<typename... _UElements, typename = typename
+ std::enable_if<sizeof...(_UElements)
+ == sizeof...(_Elements)>::type>
tuple&
operator=(const tuple<_UElements...>& __in)
{
return *this;
}
- template<typename... _UElements>
+ 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)
+ noexcept(noexcept(__in._M_swap(__in)))
+ { _Inherited::_M_swap(__in); }
+ };
template<>
- class tuple<> { };
+ class tuple<>
+ {
+ public:
+ void swap(tuple&) noexcept { /* no-op */ }
+ };
/// tuple (2-element), with construction and assignment from a pair.
template<typename _T1, typename _T2>
typedef _Tuple_impl<0, _T1, _T2> _Inherited;
public:
- tuple()
+ constexpr tuple()
: _Inherited() { }
explicit
- tuple(const _T1& __a1, const _T2& __a2)
+ constexpr tuple(const _T1& __a1, const _T2& __a2)
: _Inherited(__a1, __a2) { }
template<typename _U1, typename _U2>
tuple(_U1&& __a1, _U2&& __a2)
: _Inherited(std::forward<_U1>(__a1), std::forward<_U2>(__a2)) { }
- tuple(const tuple& __in)
- : _Inherited(static_cast<const _Inherited&>(__in)) { }
-
- tuple(tuple&& __in)
- : _Inherited(std::move<_Inherited>(__in)) { }
+ constexpr tuple(const tuple&) = default;
+ tuple(tuple&&) = default;
template<typename _U1, typename _U2>
tuple(const tuple<_U1, _U2>& __in)
template<typename _U1, typename _U2>
tuple(tuple<_U1, _U2>&& __in)
- : _Inherited(std::move<_Tuple_impl<0, _U1, _U2> >(__in)) { }
+ : _Inherited(static_cast<_Tuple_impl<0, _U1, _U2>&&>(__in)) { }
template<typename _U1, typename _U2>
tuple(const pair<_U1, _U2>& __in)
template<typename _U1, typename _U2>
tuple(pair<_U1, _U2>&& __in)
- : _Inherited(std::move(__in.first), std::move(__in.second)) { }
+ : _Inherited(std::forward<_U1>(__in.first),
+ std::forward<_U2>(__in.second)) { }
+
+ // allocator-extended constructors
+
+ template<typename _Alloc>
+ tuple(allocator_arg_t __tag, const _Alloc& __a)
+ : _Inherited(__tag, __a) { }
+
+ template<typename _Alloc>
+ tuple(allocator_arg_t __tag, const _Alloc& __a,
+ const _T1& __a1, const _T2& __a2)
+ : _Inherited(__tag, __a, __a1, __a2) { }
+
+ template<typename _Alloc, typename _U1, typename _U2>
+ tuple(allocator_arg_t __tag, const _Alloc& __a, _U1&& __a1, _U2&& __a2)
+ : _Inherited(__tag, __a, std::forward<_U1>(__a1),
+ std::forward<_U2>(__a2)) { }
+
+ template<typename _Alloc>
+ tuple(allocator_arg_t __tag, const _Alloc& __a, const tuple& __in)
+ : _Inherited(__tag, __a, static_cast<const _Inherited&>(__in)) { }
+
+ template<typename _Alloc>
+ tuple(allocator_arg_t __tag, const _Alloc& __a, tuple&& __in)
+ : _Inherited(__tag, __a, static_cast<_Inherited&&>(__in)) { }
+
+ template<typename _Alloc, typename _U1, typename _U2>
+ tuple(allocator_arg_t __tag, const _Alloc& __a,
+ const tuple<_U1, _U2>& __in)
+ : _Inherited(__tag, __a,
+ static_cast<const _Tuple_impl<0, _U1, _U2>&>(__in))
+ { }
+
+ template<typename _Alloc, typename _U1, typename _U2>
+ tuple(allocator_arg_t __tag, const _Alloc& __a, tuple<_U1, _U2>&& __in)
+ : _Inherited(__tag, __a, static_cast<_Tuple_impl<0, _U1, _U2>&&>(__in))
+ { }
+
+ template<typename _Alloc, typename _U1, typename _U2>
+ tuple(allocator_arg_t __tag, const _Alloc& __a,
+ const pair<_U1, _U2>& __in)
+ : _Inherited(__tag, __a, __in.first, __in.second) { }
+
+ template<typename _Alloc, typename _U1, typename _U2>
+ tuple(allocator_arg_t __tag, const _Alloc& __a, pair<_U1, _U2>&& __in)
+ : _Inherited(__tag, __a, std::forward<_U1>(__in.first),
+ std::forward<_U2>(__in.second)) { }
tuple&
operator=(const tuple& __in)
tuple&
operator=(tuple&& __in)
+ noexcept(std::is_nothrow_move_assignable<_Inherited>::value)
{
static_cast<_Inherited&>(*this) = std::move(__in);
return *this;
tuple&
operator=(pair<_U1, _U2>&& __in)
{
- this->_M_head() = std::move(__in.first);
- this->_M_tail()._M_head() = std::move(__in.second);
+ this->_M_head() = std::forward<_U1>(__in.first);
+ this->_M_tail()._M_head() = std::forward<_U2>(__in.second);
+ return *this;
+ }
+
+ void
+ swap(tuple& __in)
+ noexcept(noexcept(__in._M_swap(__in)))
+ { _Inherited::_M_swap(__in); }
+ };
+
+ /// 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_constructible<_T1, _U1&&>::value>::type>
+ explicit
+ tuple(_U1&& __a1)
+ : _Inherited(std::forward<_U1>(__a1)) { }
+
+ constexpr tuple(const tuple&) = default;
+ tuple(tuple&&) = default;
+
+ 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)) { }
+
+ // allocator-extended constructors
+
+ template<typename _Alloc>
+ tuple(allocator_arg_t __tag, const _Alloc& __a)
+ : _Inherited(__tag, __a) { }
+
+ template<typename _Alloc>
+ tuple(allocator_arg_t __tag, const _Alloc& __a, const _T1& __a1)
+ : _Inherited(__tag, __a, __a1) { }
+
+ // TODO: constrain for is_uses_allocator_constructible<_T1, _U1&&, _Alloc>
+ template<typename _Alloc, typename _U1>
+ tuple(allocator_arg_t __tag, const _Alloc& __a, _U1&& __a1)
+ : _Inherited(__tag, __a, std::forward<_U1>(__a1)) { }
+
+ template<typename _Alloc>
+ tuple(allocator_arg_t __tag, const _Alloc& __a, const tuple& __in)
+ : _Inherited(__tag, __a, static_cast<const _Inherited&>(__in)) { }
+
+ template<typename _Alloc>
+ tuple(allocator_arg_t __tag, const _Alloc& __a, tuple&& __in)
+ : _Inherited(__tag, __a, static_cast<_Inherited&&>(__in)) { }
+
+ template<typename _Alloc, typename _U1>
+ tuple(allocator_arg_t __tag, const _Alloc& __a, const tuple<_U1>& __in)
+ : _Inherited(__tag, __a, static_cast<const _Tuple_impl<0, _U1>&>(__in))
+ { }
+
+ template<typename _Alloc, typename _U1>
+ tuple(allocator_arg_t __tag, const _Alloc& __a, tuple<_U1>&& __in)
+ : _Inherited(__tag, __a, static_cast<_Tuple_impl<0, _U1>&&>(__in)) { }
+
+ tuple&
+ operator=(const tuple& __in)
+ {
+ static_cast<_Inherited&>(*this) = __in;
+ return *this;
+ }
+
+ tuple&
+ operator=(tuple&& __in)
+ noexcept(std::is_nothrow_move_assignable<_Inherited>::value)
+ {
+ 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)
+ noexcept(noexcept(__in._M_swap(__in)))
+ { _Inherited::_M_swap(__in); }
};
/// Gives the type of the ith element of a given tuple type.
- template<int __i, typename _Tp>
+ 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<int __i, typename _Head, typename... _Tail>
+ template<std::size_t __i, typename _Head, typename... _Tail>
struct tuple_element<__i, tuple<_Head, _Tail...> >
: tuple_element<__i - 1, tuple<_Tail...> > { };
typedef _Head type;
};
+ template<std::size_t __i, typename _Tp>
+ struct tuple_element<__i, const _Tp>
+ {
+ typedef typename
+ add_const<typename tuple_element<__i, _Tp>::type>::type type;
+ };
+
+ template<std::size_t __i, typename _Tp>
+ struct tuple_element<__i, volatile _Tp>
+ {
+ typedef typename
+ add_volatile<typename tuple_element<__i, _Tp>::type>::type type;
+ };
+
+ template<std::size_t __i, typename _Tp>
+ struct tuple_element<__i, const volatile _Tp>
+ {
+ typedef typename
+ add_cv<typename tuple_element<__i, _Tp>::type>::type 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 int value = sizeof...(_Elements);
- };
+ template<typename _Tp>
+ struct tuple_size<const _Tp>
+ : public integral_constant<
+ typename remove_cv<decltype(tuple_size<_Tp>::value)>::type,
+ tuple_size<_Tp>::value> { };
+
+ template<typename _Tp>
+ struct tuple_size<volatile _Tp>
+ : public integral_constant<
+ typename remove_cv<decltype(tuple_size<_Tp>::value)>::type,
+ tuple_size<_Tp>::value> { };
+
+ template<typename _Tp>
+ struct tuple_size<const volatile _Tp>
+ : public integral_constant<
+ typename remove_cv<decltype(tuple_size<_Tp>::value)>::type,
+ tuple_size<_Tp>::value> { };
+ /// class tuple_size
template<typename... _Elements>
- const int tuple_size<tuple<_Elements...> >::value;
+ struct tuple_size<tuple<_Elements...>>
+ : public integral_constant<std::size_t, sizeof...(_Elements)> { };
- template<int __i, typename _Head, typename... _Tail>
+ template<std::size_t __i, typename _Head, typename... _Tail>
inline typename __add_ref<_Head>::type
- __get_helper(_Tuple_impl<__i, _Head, _Tail...>& __t)
+ __get_helper(_Tuple_impl<__i, _Head, _Tail...>& __t) noexcept
{ return __t._M_head(); }
- template<int __i, typename _Head, typename... _Tail>
+ 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)
+ __get_helper(const _Tuple_impl<__i, _Head, _Tail...>& __t) noexcept
{ 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<int __i, typename... _Elements>
+ // Return a reference (const reference, rvalue 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
+ typename tuple_element<__i, tuple<_Elements...>>::type
>::type
- get(tuple<_Elements...>& __t)
+ get(tuple<_Elements...>& __t) noexcept
{ return __get_helper<__i>(__t); }
- template<int __i, typename... _Elements>
+ template<std::size_t __i, typename... _Elements>
inline typename __add_c_ref<
- typename tuple_element<__i, tuple<_Elements...> >::type
+ typename tuple_element<__i, tuple<_Elements...>>::type
>::type
- get(const tuple<_Elements...>& __t)
+ get(const tuple<_Elements...>& __t) noexcept
{ return __get_helper<__i>(__t); }
+ template<std::size_t __i, typename... _Elements>
+ inline typename __add_r_ref<
+ typename tuple_element<__i, tuple<_Elements...>>::type
+ >::type
+ get(tuple<_Elements...>&& __t) noexcept
+ { return std::forward<typename tuple_element<__i,
+ tuple<_Elements...>>::type&&>(get<__i>(__t)); }
+
// This class helps construct the various comparison operations on tuples
- template<int __check_equal_size, int __i, int __j,
+ template<std::size_t __check_equal_size, std::size_t __i, std::size_t __j,
typename _Tp, typename _Up>
struct __tuple_compare;
- template<int __i, int __j, typename _Tp, typename _Up>
+ 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));
+ __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));
+ __tuple_compare<0, __i + 1, __j, _Tp, _Up>::__less(__t, __u));
}
};
- template<int __i, typename _Tp, typename _Up>
+ 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 __result_type(std::forward<_Elements>(__args)...);
}
- template<int...> struct __index_holder { };
+ template<typename... _Elements>
+ inline tuple<_Elements&&...>
+ forward_as_tuple(_Elements&&... __args) noexcept
+ { return tuple<_Elements&&...>(std::forward<_Elements>(__args)...); }
+
+ template<std::size_t...> struct __index_holder { };
- template<int __i, typename _IdxHolder, typename... _Elements>
+ template<std::size_t __i, typename _IdxHolder, typename... _Elements>
struct __index_holder_impl;
- template<int __i, int... _Indexes, typename _IdxHolder, typename... _Elements>
+ template<std::size_t __i, std::size_t... _Indexes, typename _IdxHolder,
+ typename... _Elements>
struct __index_holder_impl<__i, __index_holder<_Indexes...>,
_IdxHolder, _Elements...>
{
_Elements...>::type type;
};
- template<int __i, int... _Indexes>
+ template<std::size_t __i, std::size_t... _Indexes>
struct __index_holder_impl<__i, __index_holder<_Indexes...> >
{ typedef __index_holder<_Indexes...> type; };
struct __make_index_holder
: __index_holder_impl<0, __index_holder<>, _Elements...> { };
- template<typename... _TElements, int... _TIdx,
- typename... _UElements, int... _UIdx>
+ 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...>&,
{ return tuple<_TElements..., _UElements...>(get<_TIdx>(__t)...,
get<_UIdx>(__u)...); }
- template<typename... _TElements, int... _TIdx,
- typename... _UElements, int... _UIdx>
+ 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::move(get<_TIdx>(__t))..., get<_UIdx>(__u)...); }
+ (std::forward<_TElements>(get<_TIdx>(__t))..., get<_UIdx>(__u)...); }
- template<typename... _TElements, int... _TIdx,
- typename... _UElements, int... _UIdx>
+ 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::move(get<_UIdx>(__u))...); }
+ (get<_TIdx>(__t)..., std::forward<_UElements>(get<_UIdx>(__u))...); }
- template<typename... _TElements, int... _TIdx,
- typename... _UElements, int... _UIdx>
+ 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::move(get<_TIdx>(__t))..., std::move(get<_UIdx>(__u))...); }
+ (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
template<typename... _Elements>
inline tuple<_Elements&...>
- tie(_Elements&... __args)
+ tie(_Elements&... __args) noexcept
{ return tuple<_Elements&...>(__args...); }
+ template<typename... _Elements>
+ inline void
+ swap(tuple<_Elements...>& __x, tuple<_Elements...>& __y)
+ noexcept(noexcept(__x.swap(__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>
- _Swallow_assign&
- operator=(const _Tp&)
+ const _Swallow_assign&
+ operator=(const _Tp&) const
{ return *this; }
};
- // TODO: Put this in some kind of shared file.
- namespace
- {
- _Swallow_assign ignore;
- }; // anonymous namespace
-}
+ const _Swallow_assign ignore{};
+
+ /// Partial specialization for tuples
+ template<typename... _Types, typename _Alloc>
+ struct uses_allocator<tuple<_Types...>, _Alloc> : true_type { };
+
+ /**
+ * 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
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