57317d2a2c
2008-05-25 Paolo Carlini <paolo.carlini@oracle.com> * include/std/tuple: Ifndef __GXX_EXPERIMENTAL_CXX0X__ just error out. * include/std/date_time: Likewise. * include/std/system_error: Likewise. * include/std/type_traits: Likewise; fix typo in macro name. * include/std/regex: Likewise. * include/std/random: Likewise. * include/std/unordered_map: Likewise. * include/std/condition_variable: Likewise. * include/std/unordered_set: Likewise. * include/std/mutex: Likewise. * include/std/array: Likewise. * include/c_std/cmath: Fix obsolete comment. * include/c_global/cmath: Likewise. From-SVN: r135890
651 lines
20 KiB
C++
651 lines
20 KiB
C++
// <tuple> -*- C++ -*-
|
|
|
|
// Copyright (C) 2007, 2008 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)
|
|
// 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.
|
|
|
|
// 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.
|
|
|
|
// 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.
|
|
|
|
/** @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 <c++0x_warning.h>
|
|
#else
|
|
|
|
#include <utility>
|
|
|
|
namespace std
|
|
{
|
|
// 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
|
|
{
|
|
_Head_base()
|
|
: _Head() { }
|
|
|
|
_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; }
|
|
};
|
|
|
|
template<std::size_t _Idx, typename _Head>
|
|
struct _Head_base<_Idx, _Head, false>
|
|
{
|
|
_Head_base()
|
|
: _M_head_impl() { }
|
|
|
|
_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; }
|
|
|
|
_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> { };
|
|
|
|
/**
|
|
* 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; }
|
|
|
|
_Tuple_impl()
|
|
: _Inherited(), _Base() { }
|
|
|
|
explicit
|
|
_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)) { }
|
|
|
|
_Tuple_impl(const _Tuple_impl& __in)
|
|
: _Inherited(__in._M_tail()), _Base(__in._M_head()) { }
|
|
|
|
_Tuple_impl(_Tuple_impl&& __in)
|
|
: _Inherited(std::move<_Inherited&&>(__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())) { }
|
|
|
|
_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::move(__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... _UElements>
|
|
_Tuple_impl&
|
|
operator=(_Tuple_impl<_Idx, _UElements...>&& __in)
|
|
{
|
|
_M_head() = std::move(__in._M_head());
|
|
_M_tail() = std::move(__in._M_tail());
|
|
return *this;
|
|
}
|
|
};
|
|
|
|
/// tuple
|
|
template<typename... _Elements>
|
|
class tuple : public _Tuple_impl<0, _Elements...>
|
|
{
|
|
typedef _Tuple_impl<0, _Elements...> _Inherited;
|
|
|
|
public:
|
|
tuple()
|
|
: _Inherited() { }
|
|
|
|
explicit
|
|
tuple(const _Elements&... __elements)
|
|
: _Inherited(__elements...) { }
|
|
|
|
template<typename... _UElements>
|
|
explicit
|
|
tuple(_UElements&&... __elements)
|
|
: _Inherited(std::forward<_UElements>(__elements)...) { }
|
|
|
|
tuple(const tuple& __in)
|
|
: _Inherited(static_cast<const _Inherited&>(__in)) { }
|
|
|
|
tuple(tuple&& __in)
|
|
: _Inherited(std::move<_Inherited>(__in)) { }
|
|
|
|
template<typename... _UElements>
|
|
tuple(const tuple<_UElements...>& __in)
|
|
: _Inherited(static_cast<const _Tuple_impl<0, _UElements...>&>(__in))
|
|
{ }
|
|
|
|
template<typename... _UElements>
|
|
tuple(tuple<_UElements...>&& __in)
|
|
: _Inherited(std::move<_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))
|
|
{ }
|
|
|
|
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>
|
|
tuple&
|
|
operator=(const tuple<_UElements...>& __in)
|
|
{
|
|
static_cast<_Inherited&>(*this) = __in;
|
|
return *this;
|
|
}
|
|
|
|
template<typename... _UElements>
|
|
tuple&
|
|
operator=(tuple<_UElements...>&& __in)
|
|
{
|
|
static_cast<_Inherited&>(*this) = std::move(__in);
|
|
return *this;
|
|
}
|
|
};
|
|
|
|
|
|
template<>
|
|
class tuple<> { };
|
|
|
|
/// 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:
|
|
tuple()
|
|
: _Inherited() { }
|
|
|
|
explicit
|
|
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)) { }
|
|
|
|
tuple(const tuple& __in)
|
|
: _Inherited(static_cast<const _Inherited&>(__in)) { }
|
|
|
|
tuple(tuple&& __in)
|
|
: _Inherited(std::move<_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(std::move<_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::move(__in.first), std::move(__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::move(__in.first);
|
|
this->_M_tail()._M_head() = std::move(__in.second);
|
|
return *this;
|
|
}
|
|
};
|
|
|
|
|
|
/// 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<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::move(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::move(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::move(get<_TIdx>(__t))..., std::move(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...); }
|
|
|
|
// 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&)
|
|
{ return *this; }
|
|
};
|
|
|
|
// TODO: Put this in some kind of shared file.
|
|
namespace
|
|
{
|
|
_Swallow_assign ignore;
|
|
}; // anonymous namespace
|
|
}
|
|
|
|
#endif // __GXX_EXPERIMENTAL_CXX0X__
|
|
|
|
#endif // _GLIBCXX_TUPLE
|