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// -*- C++ -*- |
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// Copyright (C) 2007-2013 Free Software Foundation, Inc. |
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// |
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// This file is part of the GNU ISO C++ Library. This library is free |
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// software; you can redistribute it and/or modify it under the |
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// terms of the GNU General Public License as published by the |
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// Free Software Foundation; either version 3, or (at your option) |
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// any later version. |
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// This library is distributed in the hope that it will be useful, |
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// but WITHOUT ANY WARRANTY; without even the implied warranty of |
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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// GNU General Public License for more details. |
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// Under Section 7 of GPL version 3, you are granted additional |
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// permissions described in the GCC Runtime Library Exception, version |
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// 3.1, as published by the Free Software Foundation. |
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// You should have received a copy of the GNU General Public License and |
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// a copy of the GCC Runtime Library Exception along with this program; |
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
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// . |
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/** @file include/tuple |
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* This is a Standard C++ Library header. |
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*/ |
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#ifndef _GLIBCXX_TUPLE |
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#define _GLIBCXX_TUPLE 1 |
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#pragma GCC system_header |
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#if __cplusplus < 201103L |
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# include |
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#else |
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#include |
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#include |
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#include |
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namespace std _GLIBCXX_VISIBILITY(default) |
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{ |
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_GLIBCXX_BEGIN_NAMESPACE_VERSION |
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/** |
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* @addtogroup utilities |
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* @{ |
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*/ |
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// Adds a const reference to a non-reference type. |
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template |
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struct __add_c_ref |
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{ typedef const _Tp& type; }; |
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template |
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struct __add_c_ref<_Tp&> |
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{ typedef _Tp& type; }; |
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// Adds a reference to a non-reference type. |
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template |
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struct __add_ref |
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{ typedef _Tp& type; }; |
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template |
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struct __add_ref<_Tp&> |
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{ typedef _Tp& type; }; |
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// Adds an rvalue reference to a non-reference type. |
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template |
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struct __add_r_ref |
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{ typedef _Tp&& type; }; |
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template |
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struct __add_r_ref<_Tp&> |
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{ typedef _Tp& type; }; |
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template |
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struct _Head_base; |
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template |
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struct _Head_base<_Idx, _Head, true> |
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: public _Head |
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{ |
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constexpr _Head_base() |
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: _Head() { } |
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constexpr _Head_base(const _Head& __h) |
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: _Head(__h) { } |
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constexpr _Head_base(const _Head_base&) = default; |
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constexpr _Head_base(_Head_base&&) = default; |
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template |
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constexpr _Head_base(_UHead&& __h) |
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: _Head(std::forward<_UHead>(__h)) { } |
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_Head_base(allocator_arg_t, __uses_alloc0) |
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: _Head() { } |
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template |
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_Head_base(allocator_arg_t, __uses_alloc1<_Alloc> __a) |
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: _Head(allocator_arg, *__a._M_a) { } |
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template |
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_Head_base(allocator_arg_t, __uses_alloc2<_Alloc> __a) |
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: _Head(*__a._M_a) { } |
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template |
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_Head_base(__uses_alloc0, _UHead&& __uhead) |
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: _Head(std::forward<_UHead>(__uhead)) { } |
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template |
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_Head_base(__uses_alloc1<_Alloc> __a, _UHead&& __uhead) |
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: _Head(allocator_arg, *__a._M_a, std::forward<_UHead>(__uhead)) { } |
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template |
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_Head_base(__uses_alloc2<_Alloc> __a, _UHead&& __uhead) |
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: _Head(std::forward<_UHead>(__uhead), *__a._M_a) { } |
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static constexpr _Head& |
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_M_head(_Head_base& __b) noexcept { return __b; } |
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static constexpr const _Head& |
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_M_head(const _Head_base& __b) noexcept { return __b; } |
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}; |
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template |
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struct _Head_base<_Idx, _Head, false> |
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{ |
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constexpr _Head_base() |
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: _M_head_impl() { } |
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constexpr _Head_base(const _Head& __h) |
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: _M_head_impl(__h) { } |
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constexpr _Head_base(const _Head_base&) = default; |
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constexpr _Head_base(_Head_base&&) = default; |
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template |
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constexpr _Head_base(_UHead&& __h) |
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: _M_head_impl(std::forward<_UHead>(__h)) { } |
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_Head_base(allocator_arg_t, __uses_alloc0) |
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: _M_head_impl() { } |
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template |
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_Head_base(allocator_arg_t, __uses_alloc1<_Alloc> __a) |
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: _M_head_impl(allocator_arg, *__a._M_a) { } |
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template |
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_Head_base(allocator_arg_t, __uses_alloc2<_Alloc> __a) |
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: _M_head_impl(*__a._M_a) { } |
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template |
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_Head_base(__uses_alloc0, _UHead&& __uhead) |
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: _M_head_impl(std::forward<_UHead>(__uhead)) { } |
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template |
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_Head_base(__uses_alloc1<_Alloc> __a, _UHead&& __uhead) |
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: _M_head_impl(allocator_arg, *__a._M_a, std::forward<_UHead>(__uhead)) |
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{ } |
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template |
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_Head_base(__uses_alloc2<_Alloc> __a, _UHead&& __uhead) |
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: _M_head_impl(std::forward<_UHead>(__uhead), *__a._M_a) { } |
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static constexpr _Head& |
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_M_head(_Head_base& __b) noexcept { return __b._M_head_impl; } |
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static constexpr const _Head& |
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_M_head(const _Head_base& __b) noexcept { return __b._M_head_impl; } |
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_Head _M_head_impl; |
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}; |
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/** |
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* Contains the actual implementation of the @c tuple template, stored |
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* as a recursive inheritance hierarchy from the first element (most |
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* derived class) to the last (least derived class). The @c Idx |
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* parameter gives the 0-based index of the element stored at this |
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* point in the hierarchy; we use it to implement a constant-time |
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* get() operation. |
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*/ |
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template |
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struct _Tuple_impl; |
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/** |
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* Zero-element tuple implementation. This is the basis case for the |
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* inheritance recursion. |
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*/ |
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template |
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struct _Tuple_impl<_Idx> |
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{ |
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template friend class _Tuple_impl; |
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_Tuple_impl() = default; |
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template |
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_Tuple_impl(allocator_arg_t, const _Alloc&) { } |
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template |
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_Tuple_impl(allocator_arg_t, const _Alloc&, const _Tuple_impl&) { } |
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template |
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_Tuple_impl(allocator_arg_t, const _Alloc&, _Tuple_impl&&) { } |
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protected: |
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void _M_swap(_Tuple_impl&) noexcept { /* no-op */ } |
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}; |
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template |
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struct __is_empty_non_tuple : is_empty<_Tp> { }; |
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// Using EBO for elements that are tuples causes ambiguous base errors. |
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template |
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struct __is_empty_non_tuple> : false_type { }; |
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// Use the Empty Base-class Optimization for empty, non-final types. |
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template |
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using __empty_not_final |
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= typename conditional<__is_final(_Tp), false_type, |
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__is_empty_non_tuple<_Tp>>::type; |
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/** |
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* Recursive tuple implementation. Here we store the @c Head element |
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* and derive from a @c Tuple_impl containing the remaining elements |
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* (which contains the @c Tail). |
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*/ |
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template |
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struct _Tuple_impl<_Idx, _Head, _Tail...> |
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: public _Tuple_impl<_Idx + 1, _Tail...>, |
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private _Head_base<_Idx, _Head, __empty_not_final<_Head>::value> |
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{ |
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template friend class _Tuple_impl; |
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typedef _Tuple_impl<_Idx + 1, _Tail...> _Inherited; |
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typedef _Head_base<_Idx, _Head, __empty_not_final<_Head>::value> _Base; |
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static constexpr _Head& |
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_M_head(_Tuple_impl& __t) noexcept { return _Base::_M_head(__t); } |
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static constexpr const _Head& |
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_M_head(const _Tuple_impl& __t) noexcept { return _Base::_M_head(__t); } |
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static constexpr _Inherited& |
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_M_tail(_Tuple_impl& __t) noexcept { return __t; } |
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static constexpr const _Inherited& |
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_M_tail(const _Tuple_impl& __t) noexcept { return __t; } |
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constexpr _Tuple_impl() |
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: _Inherited(), _Base() { } |
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explicit |
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constexpr _Tuple_impl(const _Head& __head, const _Tail&... __tail) |
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: _Inherited(__tail...), _Base(__head) { } |
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template |
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enable_if::type> |
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explicit |
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constexpr _Tuple_impl(_UHead&& __head, _UTail&&... __tail) |
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: _Inherited(std::forward<_UTail>(__tail)...), |
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_Base(std::forward<_UHead>(__head)) { } |
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constexpr _Tuple_impl(const _Tuple_impl&) = default; |
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constexpr |
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_Tuple_impl(_Tuple_impl&& __in) |
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noexcept(__and_, |
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is_nothrow_move_constructible<_Inherited>>::value) |
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: _Inherited(std::move(_M_tail(__in))), |
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_Base(std::forward<_Head>(_M_head(__in))) { } |
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template |
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constexpr _Tuple_impl(const _Tuple_impl<_Idx, _UElements...>& __in) |
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: _Inherited(_Tuple_impl<_Idx, _UElements...>::_M_tail(__in)), |
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_Base(_Tuple_impl<_Idx, _UElements...>::_M_head(__in)) { } |
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template |
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constexpr _Tuple_impl(_Tuple_impl<_Idx, _UHead, _UTails...>&& __in) |
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: _Inherited(std::move |
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(_Tuple_impl<_Idx, _UHead, _UTails...>::_M_tail(__in))), |
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_Base(std::forward<_UHead> |
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(_Tuple_impl<_Idx, _UHead, _UTails...>::_M_head(__in))) { } |
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template |
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_Tuple_impl(allocator_arg_t __tag, const _Alloc& __a) |
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: _Inherited(__tag, __a), |
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_Base(__tag, __use_alloc<_Head>(__a)) { } |
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template |
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_Tuple_impl(allocator_arg_t __tag, const _Alloc& __a, |
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const _Head& __head, const _Tail&... __tail) |
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: _Inherited(__tag, __a, __tail...), |
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_Base(__use_alloc<_Head, _Alloc, _Head>(__a), __head) { } |
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template |
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typename = typename enable_if |
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== sizeof...(_UTail)>::type> |
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_Tuple_impl(allocator_arg_t __tag, const _Alloc& __a, |
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_UHead&& __head, _UTail&&... __tail) |
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: _Inherited(__tag, __a, std::forward<_UTail>(__tail)...), |
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_Base(__use_alloc<_Head, _Alloc, _UHead>(__a), |
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std::forward<_UHead>(__head)) { } |
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template |
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_Tuple_impl(allocator_arg_t __tag, const _Alloc& __a, |
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const _Tuple_impl& __in) |
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: _Inherited(__tag, __a, _M_tail(__in)), |
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_Base(__use_alloc<_Head, _Alloc, _Head>(__a), _M_head(__in)) { } |
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template |
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_Tuple_impl(allocator_arg_t __tag, const _Alloc& __a, |
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_Tuple_impl&& __in) |
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: _Inherited(__tag, __a, std::move(_M_tail(__in))), |
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_Base(__use_alloc<_Head, _Alloc, _Head>(__a), |
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std::forward<_Head>(_M_head(__in))) { } |
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template |
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_Tuple_impl(allocator_arg_t __tag, const _Alloc& __a, |
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const _Tuple_impl<_Idx, _UElements...>& __in) |
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: _Inherited(__tag, __a, |
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_Tuple_impl<_Idx, _UElements...>::_M_tail(__in)), |
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_Base(__use_alloc<_Head, _Alloc, _Head>(__a), |
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_Tuple_impl<_Idx, _UElements...>::_M_head(__in)) { } |
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template |
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_Tuple_impl(allocator_arg_t __tag, const _Alloc& __a, |
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_Tuple_impl<_Idx, _UHead, _UTails...>&& __in) |
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: _Inherited(__tag, __a, std::move |
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(_Tuple_impl<_Idx, _UHead, _UTails...>::_M_tail(__in))), |
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_Base(__use_alloc<_Head, _Alloc, _UHead>(__a), |
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std::forward<_UHead> |
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(_Tuple_impl<_Idx, _UHead, _UTails...>::_M_head(__in))) { } |
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_Tuple_impl& |
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operator=(const _Tuple_impl& __in) |
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{ |
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_M_head(*this) = _M_head(__in); |
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_M_tail(*this) = _M_tail(__in); |
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return *this; |
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} |
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_Tuple_impl& |
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operator=(_Tuple_impl&& __in) |
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noexcept(__and_, |
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is_nothrow_move_assignable<_Inherited>>::value) |
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{ |
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_M_head(*this) = std::forward<_Head>(_M_head(__in)); |
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_M_tail(*this) = std::move(_M_tail(__in)); |
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return *this; |
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} |
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template |
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_Tuple_impl& |
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operator=(const _Tuple_impl<_Idx, _UElements...>& __in) |
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{ |
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_M_head(*this) = _Tuple_impl<_Idx, _UElements...>::_M_head(__in); |
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_M_tail(*this) = _Tuple_impl<_Idx, _UElements...>::_M_tail(__in); |
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return *this; |
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} |
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template |
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_Tuple_impl& |
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operator=(_Tuple_impl<_Idx, _UHead, _UTails...>&& __in) |
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{ |
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_M_head(*this) = std::forward<_UHead> |
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(_Tuple_impl<_Idx, _UHead, _UTails...>::_M_head(__in)); |
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_M_tail(*this) = std::move |
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|
371 |
(_Tuple_impl<_Idx, _UHead, _UTails...>::_M_tail(__in)); |
|
|
372 |
return *this; |
|
|
373 |
} |
|
|
374 |
|
|
|
375 |
protected: |
|
|
376 |
void |
|
|
377 |
_M_swap(_Tuple_impl& __in) |
|
|
378 |
noexcept(noexcept(swap(std::declval<_Head&>(), |
|
|
379 |
std::declval<_Head&>())) |
|
|
380 |
&& noexcept(_M_tail(__in)._M_swap(_M_tail(__in)))) |
|
|
381 |
{ |
|
|
382 |
using std::swap; |
|
|
383 |
swap(_M_head(*this), _M_head(__in)); |
|
|
384 |
_Inherited::_M_swap(_M_tail(__in)); |
|
|
385 |
} |
|
|
386 |
}; |
|
|
387 |
|
|
|
388 |
/// Primary class template, tuple |
|
|
389 |
template |
|
|
390 |
class tuple : public _Tuple_impl<0, _Elements...> |
|
|
391 |
{ |
|
|
392 |
typedef _Tuple_impl<0, _Elements...> _Inherited; |
|
|
393 |
|
|
|
394 |
public: |
|
|
395 |
constexpr tuple() |
|
|
396 |
: _Inherited() { } |
|
|
397 |
|
|
|
398 |
explicit |
|
|
399 |
constexpr tuple(const _Elements&... __elements) |
|
|
400 |
: _Inherited(__elements...) { } |
|
|
401 |
|
|
|
402 |
template |
|
|
403 |
enable_if<__and_ |
|
|
404 |
_Elements>...>::value>::type> |
|
|
405 |
explicit |
|
|
406 |
constexpr tuple(_UElements&&... __elements) |
|
|
407 |
: _Inherited(std::forward<_UElements>(__elements)...) { } |
|
|
408 |
|
|
|
409 |
constexpr tuple(const tuple&) = default; |
|
|
410 |
|
|
|
411 |
constexpr tuple(tuple&&) = default; |
|
|
412 |
|
|
|
413 |
template |
|
|
414 |
enable_if<__and_ |
|
|
415 |
_Elements>...>::value>::type> |
|
|
416 |
constexpr tuple(const tuple<_UElements...>& __in) |
|
|
417 |
: _Inherited(static_cast&>(__in)) |
|
|
418 |
{ } |
|
|
419 |
|
|
|
420 |
template |
|
|
421 |
enable_if<__and_ |
|
|
422 |
_Elements>...>::value>::type> |
|
|
423 |
constexpr tuple(tuple<_UElements...>&& __in) |
|
|
424 |
: _Inherited(static_cast<_Tuple_impl<0, _UElements...>&&>(__in)) { } |
|
|
425 |
|
|
|
426 |
// Allocator-extended constructors. |
|
|
427 |
|
|
|
428 |
template |
|
|
429 |
tuple(allocator_arg_t __tag, const _Alloc& __a) |
|
|
430 |
: _Inherited(__tag, __a) { } |
|
|
431 |
|
|
|
432 |
template |
|
|
433 |
tuple(allocator_arg_t __tag, const _Alloc& __a, |
|
|
434 |
const _Elements&... __elements) |
|
|
435 |
: _Inherited(__tag, __a, __elements...) { } |
|
|
436 |
|
|
|
437 |
template |
|
|
438 |
enable_if |
|
|
439 |
== sizeof...(_Elements)>::type> |
|
|
440 |
tuple(allocator_arg_t __tag, const _Alloc& __a, |
|
|
441 |
_UElements&&... __elements) |
|
|
442 |
: _Inherited(__tag, __a, std::forward<_UElements>(__elements)...) |
|
|
443 |
{ } |
|
|
444 |
|
|
|
445 |
template |
|
|
446 |
tuple(allocator_arg_t __tag, const _Alloc& __a, const tuple& __in) |
|
|
447 |
: _Inherited(__tag, __a, static_cast(__in)) { } |
|
|
448 |
|
|
|
449 |
template |
|
|
450 |
tuple(allocator_arg_t __tag, const _Alloc& __a, tuple&& __in) |
|
|
451 |
: _Inherited(__tag, __a, static_cast<_Inherited&&>(__in)) { } |
|
|
452 |
|
|
|
453 |
template |
|
|
454 |
enable_if |
|
|
455 |
== sizeof...(_Elements)>::type> |
|
|
456 |
tuple(allocator_arg_t __tag, const _Alloc& __a, |
|
|
457 |
const tuple<_UElements...>& __in) |
|
|
458 |
: _Inherited(__tag, __a, |
|
|
459 |
static_cast&>(__in)) |
|
|
460 |
{ } |
|
|
461 |
|
|
|
462 |
template |
|
|
463 |
enable_if |
|
|
464 |
== sizeof...(_Elements)>::type> |
|
|
465 |
tuple(allocator_arg_t __tag, const _Alloc& __a, |
|
|
466 |
tuple<_UElements...>&& __in) |
|
|
467 |
: _Inherited(__tag, __a, |
|
|
468 |
static_cast<_Tuple_impl<0, _UElements...>&&>(__in)) |
|
|
469 |
{ } |
|
|
470 |
|
|
|
471 |
tuple& |
|
|
472 |
operator=(const tuple& __in) |
|
|
473 |
{ |
|
|
474 |
static_cast<_Inherited&>(*this) = __in; |
|
|
475 |
return *this; |
|
|
476 |
} |
|
|
477 |
|
|
|
478 |
tuple& |
|
|
479 |
operator=(tuple&& __in) |
|
|
480 |
noexcept(is_nothrow_move_assignable<_Inherited>::value) |
|
|
481 |
{ |
|
|
482 |
static_cast<_Inherited&>(*this) = std::move(__in); |
|
|
483 |
return *this; |
|
|
484 |
} |
|
|
485 |
|
|
|
486 |
template |
|
|
487 |
enable_if |
|
|
488 |
== sizeof...(_Elements)>::type> |
|
|
489 |
tuple& |
|
|
490 |
operator=(const tuple<_UElements...>& __in) |
|
|
491 |
{ |
|
|
492 |
static_cast<_Inherited&>(*this) = __in; |
|
|
493 |
return *this; |
|
|
494 |
} |
|
|
495 |
|
|
|
496 |
template |
|
|
497 |
enable_if |
|
|
498 |
== sizeof...(_Elements)>::type> |
|
|
499 |
tuple& |
|
|
500 |
operator=(tuple<_UElements...>&& __in) |
|
|
501 |
{ |
|
|
502 |
static_cast<_Inherited&>(*this) = std::move(__in); |
|
|
503 |
return *this; |
|
|
504 |
} |
|
|
505 |
|
|
|
506 |
void |
|
|
507 |
swap(tuple& __in) |
|
|
508 |
noexcept(noexcept(__in._M_swap(__in))) |
|
|
509 |
{ _Inherited::_M_swap(__in); } |
|
|
510 |
}; |
|
|
511 |
|
|
|
512 |
// Explicit specialization, zero-element tuple. |
|
|
513 |
template<> |
|
|
514 |
class tuple<> |
|
|
515 |
{ |
|
|
516 |
public: |
|
|
517 |
void swap(tuple&) noexcept { /* no-op */ } |
|
|
518 |
}; |
|
|
519 |
|
|
|
520 |
/// Partial specialization, 2-element tuple. |
|
|
521 |
/// Includes construction and assignment from a pair. |
|
|
522 |
template |
|
|
523 |
class tuple<_T1, _T2> : public _Tuple_impl<0, _T1, _T2> |
|
|
524 |
{ |
|
|
525 |
typedef _Tuple_impl<0, _T1, _T2> _Inherited; |
|
|
526 |
|
|
|
527 |
public: |
|
|
528 |
constexpr tuple() |
|
|
529 |
: _Inherited() { } |
|
|
530 |
|
|
|
531 |
explicit |
|
|
532 |
constexpr tuple(const _T1& __a1, const _T2& __a2) |
|
|
533 |
: _Inherited(__a1, __a2) { } |
|
|
534 |
|
|
|
535 |
template |
|
|
536 |
enable_if<__and_, |
|
|
537 |
is_convertible<_U2, _T2>>::value>::type> |
|
|
538 |
explicit |
|
|
539 |
constexpr tuple(_U1&& __a1, _U2&& __a2) |
|
|
540 |
: _Inherited(std::forward<_U1>(__a1), std::forward<_U2>(__a2)) { } |
|
|
541 |
|
|
|
542 |
constexpr tuple(const tuple&) = default; |
|
|
543 |
|
|
|
544 |
constexpr tuple(tuple&&) = default; |
|
|
545 |
|
|
|
546 |
template |
|
|
547 |
enable_if<__and_, |
|
|
548 |
is_convertible>::value>::type> |
|
|
549 |
constexpr tuple(const tuple<_U1, _U2>& __in) |
|
|
550 |
: _Inherited(static_cast&>(__in)) { } |
|
|
551 |
|
|
|
552 |
template |
|
|
553 |
enable_if<__and_, |
|
|
554 |
is_convertible<_U2, _T2>>::value>::type> |
|
|
555 |
constexpr tuple(tuple<_U1, _U2>&& __in) |
|
|
556 |
: _Inherited(static_cast<_Tuple_impl<0, _U1, _U2>&&>(__in)) { } |
|
|
557 |
|
|
|
558 |
template |
|
|
559 |
enable_if<__and_, |
|
|
560 |
is_convertible>::value>::type> |
|
|
561 |
constexpr tuple(const pair<_U1, _U2>& __in) |
|
|
562 |
: _Inherited(__in.first, __in.second) { } |
|
|
563 |
|
|
|
564 |
template |
|
|
565 |
enable_if<__and_, |
|
|
566 |
is_convertible<_U2, _T2>>::value>::type> |
|
|
567 |
constexpr tuple(pair<_U1, _U2>&& __in) |
|
|
568 |
: _Inherited(std::forward<_U1>(__in.first), |
|
|
569 |
std::forward<_U2>(__in.second)) { } |
|
|
570 |
|
|
|
571 |
// Allocator-extended constructors. |
|
|
572 |
|
|
|
573 |
template |
|
|
574 |
tuple(allocator_arg_t __tag, const _Alloc& __a) |
|
|
575 |
: _Inherited(__tag, __a) { } |
|
|
576 |
|
|
|
577 |
template |
|
|
578 |
tuple(allocator_arg_t __tag, const _Alloc& __a, |
|
|
579 |
const _T1& __a1, const _T2& __a2) |
|
|
580 |
: _Inherited(__tag, __a, __a1, __a2) { } |
|
|
581 |
|
|
|
582 |
template |
|
|
583 |
tuple(allocator_arg_t __tag, const _Alloc& __a, _U1&& __a1, _U2&& __a2) |
|
|
584 |
: _Inherited(__tag, __a, std::forward<_U1>(__a1), |
|
|
585 |
std::forward<_U2>(__a2)) { } |
|
|
586 |
|
|
|
587 |
template |
|
|
588 |
tuple(allocator_arg_t __tag, const _Alloc& __a, const tuple& __in) |
|
|
589 |
: _Inherited(__tag, __a, static_cast(__in)) { } |
|
|
590 |
|
|
|
591 |
template |
|
|
592 |
tuple(allocator_arg_t __tag, const _Alloc& __a, tuple&& __in) |
|
|
593 |
: _Inherited(__tag, __a, static_cast<_Inherited&&>(__in)) { } |
|
|
594 |
|
|
|
595 |
template |
|
|
596 |
tuple(allocator_arg_t __tag, const _Alloc& __a, |
|
|
597 |
const tuple<_U1, _U2>& __in) |
|
|
598 |
: _Inherited(__tag, __a, |
|
|
599 |
static_cast&>(__in)) |
|
|
600 |
{ } |
|
|
601 |
|
|
|
602 |
template |
|
|
603 |
tuple(allocator_arg_t __tag, const _Alloc& __a, tuple<_U1, _U2>&& __in) |
|
|
604 |
: _Inherited(__tag, __a, static_cast<_Tuple_impl<0, _U1, _U2>&&>(__in)) |
|
|
605 |
{ } |
|
|
606 |
|
|
|
607 |
template |
|
|
608 |
tuple(allocator_arg_t __tag, const _Alloc& __a, |
|
|
609 |
const pair<_U1, _U2>& __in) |
|
|
610 |
: _Inherited(__tag, __a, __in.first, __in.second) { } |
|
|
611 |
|
|
|
612 |
template |
|
|
613 |
tuple(allocator_arg_t __tag, const _Alloc& __a, pair<_U1, _U2>&& __in) |
|
|
614 |
: _Inherited(__tag, __a, std::forward<_U1>(__in.first), |
|
|
615 |
std::forward<_U2>(__in.second)) { } |
|
|
616 |
|
|
|
617 |
tuple& |
|
|
618 |
operator=(const tuple& __in) |
|
|
619 |
{ |
|
|
620 |
static_cast<_Inherited&>(*this) = __in; |
|
|
621 |
return *this; |
|
|
622 |
} |
|
|
623 |
|
|
|
624 |
tuple& |
|
|
625 |
operator=(tuple&& __in) |
|
|
626 |
noexcept(is_nothrow_move_assignable<_Inherited>::value) |
|
|
627 |
{ |
|
|
628 |
static_cast<_Inherited&>(*this) = std::move(__in); |
|
|
629 |
return *this; |
|
|
630 |
} |
|
|
631 |
|
|
|
632 |
template |
|
|
633 |
tuple& |
|
|
634 |
operator=(const tuple<_U1, _U2>& __in) |
|
|
635 |
{ |
|
|
636 |
static_cast<_Inherited&>(*this) = __in; |
|
|
637 |
return *this; |
|
|
638 |
} |
|
|
639 |
|
|
|
640 |
template |
|
|
641 |
tuple& |
|
|
642 |
operator=(tuple<_U1, _U2>&& __in) |
|
|
643 |
{ |
|
|
644 |
static_cast<_Inherited&>(*this) = std::move(__in); |
|
|
645 |
return *this; |
|
|
646 |
} |
|
|
647 |
|
|
|
648 |
template |
|
|
649 |
tuple& |
|
|
650 |
operator=(const pair<_U1, _U2>& __in) |
|
|
651 |
{ |
|
|
652 |
this->_M_head(*this) = __in.first; |
|
|
653 |
this->_M_tail(*this)._M_head(*this) = __in.second; |
|
|
654 |
return *this; |
|
|
655 |
} |
|
|
656 |
|
|
|
657 |
template |
|
|
658 |
tuple& |
|
|
659 |
operator=(pair<_U1, _U2>&& __in) |
|
|
660 |
{ |
|
|
661 |
this->_M_head(*this) = std::forward<_U1>(__in.first); |
|
|
662 |
this->_M_tail(*this)._M_head(*this) = std::forward<_U2>(__in.second); |
|
|
663 |
return *this; |
|
|
664 |
} |
|
|
665 |
|
|
|
666 |
void |
|
|
667 |
swap(tuple& __in) |
|
|
668 |
noexcept(noexcept(__in._M_swap(__in))) |
|
|
669 |
{ _Inherited::_M_swap(__in); } |
|
|
670 |
}; |
|
|
671 |
|
|
|
672 |
|
|
|
673 |
/// Gives the type of the ith element of a given tuple type. |
|
|
674 |
template |
|
|
675 |
struct tuple_element; |
|
|
676 |
|
|
|
677 |
/** |
|
|
678 |
* Recursive case for tuple_element: strip off the first element in |
|
|
679 |
* the tuple and retrieve the (i-1)th element of the remaining tuple. |
|
|
680 |
*/ |
|
|
681 |
template |
|
|
682 |
struct tuple_element<__i, tuple<_Head, _Tail...> > |
|
|
683 |
: tuple_element<__i - 1, tuple<_Tail...> > { }; |
|
|
684 |
|
|
|
685 |
/** |
|
|
686 |
* Basis case for tuple_element: The first element is the one we're seeking. |
|
|
687 |
*/ |
|
|
688 |
template |
|
|
689 |
struct tuple_element<0, tuple<_Head, _Tail...> > |
|
|
690 |
{ |
|
|
691 |
typedef _Head type; |
|
|
692 |
}; |
|
|
693 |
|
|
|
694 |
template |
|
|
695 |
struct tuple_element<__i, const _Tp> |
|
|
696 |
{ |
|
|
697 |
typedef typename |
|
|
698 |
add_const::type>::type type; |
|
|
699 |
}; |
|
|
700 |
|
|
|
701 |
template |
|
|
702 |
struct tuple_element<__i, volatile _Tp> |
|
|
703 |
{ |
|
|
704 |
typedef typename |
|
|
705 |
add_volatile::type>::type type; |
|
|
706 |
}; |
|
|
707 |
|
|
|
708 |
template |
|
|
709 |
struct tuple_element<__i, const volatile _Tp> |
|
|
710 |
{ |
|
|
711 |
typedef typename |
|
|
712 |
add_cv::type>::type type; |
|
|
713 |
}; |
|
|
714 |
|
|
|
715 |
/// Finds the size of a given tuple type. |
|
|
716 |
template |
|
|
717 |
struct tuple_size; |
|
|
718 |
|
|
|
719 |
template |
|
|
720 |
struct tuple_size |
|
|
721 |
: public integral_constant< |
|
|
722 |
typename remove_cv::value)>::type, |
|
|
723 |
tuple_size<_Tp>::value> { }; |
|
|
724 |
|
|
|
725 |
template |
|
|
726 |
struct tuple_size |
|
|
727 |
: public integral_constant< |
|
|
728 |
typename remove_cv::value)>::type, |
|
|
729 |
tuple_size<_Tp>::value> { }; |
|
|
730 |
|
|
|
731 |
template |
|
|
732 |
struct tuple_size |
|
|
733 |
: public integral_constant< |
|
|
734 |
typename remove_cv::value)>::type, |
|
|
735 |
tuple_size<_Tp>::value> { }; |
|
|
736 |
|
|
|
737 |
/// class tuple_size |
|
|
738 |
template |
|
|
739 |
struct tuple_size> |
|
|
740 |
: public integral_constant { }; |
|
|
741 |
|
|
|
742 |
template |
|
|
743 |
constexpr typename __add_ref<_Head>::type |
|
|
744 |
__get_helper(_Tuple_impl<__i, _Head, _Tail...>& __t) noexcept |
|
|
745 |
{ return _Tuple_impl<__i, _Head, _Tail...>::_M_head(__t); } |
|
|
746 |
|
|
|
747 |
template |
|
|
748 |
constexpr typename __add_c_ref<_Head>::type |
|
|
749 |
__get_helper(const _Tuple_impl<__i, _Head, _Tail...>& __t) noexcept |
|
|
750 |
{ return _Tuple_impl<__i, _Head, _Tail...>::_M_head(__t); } |
|
|
751 |
|
|
|
752 |
// Return a reference (const reference, rvalue reference) to the ith element |
|
|
753 |
// of a tuple. Any const or non-const ref elements are returned with their |
|
|
754 |
// original type. |
|
|
755 |
template |
|
|
756 |
constexpr typename __add_ref< |
|
|
757 |
typename tuple_element<__i, tuple<_Elements...>>::type |
|
|
758 |
>::type |
|
|
759 |
get(tuple<_Elements...>& __t) noexcept |
| 6325 |
serge |
760 |
{ return std::__get_helper<__i>(__t); } |
| 5134 |
serge |
761 |
|
|
|
762 |
template |
|
|
763 |
constexpr typename __add_c_ref< |
|
|
764 |
typename tuple_element<__i, tuple<_Elements...>>::type |
|
|
765 |
>::type |
|
|
766 |
get(const tuple<_Elements...>& __t) noexcept |
| 6325 |
serge |
767 |
{ return std::__get_helper<__i>(__t); } |
| 5134 |
serge |
768 |
|
|
|
769 |
template |
|
|
770 |
constexpr typename __add_r_ref< |
|
|
771 |
typename tuple_element<__i, tuple<_Elements...>>::type |
|
|
772 |
>::type |
|
|
773 |
get(tuple<_Elements...>&& __t) noexcept |
|
|
774 |
{ return std::forward |
|
|
775 |
tuple<_Elements...>>::type&&>(get<__i>(__t)); } |
|
|
776 |
|
|
|
777 |
// This class helps construct the various comparison operations on tuples |
|
|
778 |
template |
|
|
779 |
typename _Tp, typename _Up> |
|
|
780 |
struct __tuple_compare; |
|
|
781 |
|
|
|
782 |
template |
|
|
783 |
struct __tuple_compare<0, __i, __j, _Tp, _Up> |
|
|
784 |
{ |
|
|
785 |
static constexpr bool |
|
|
786 |
__eq(const _Tp& __t, const _Up& __u) |
|
|
787 |
{ |
|
|
788 |
return (get<__i>(__t) == get<__i>(__u) && |
|
|
789 |
__tuple_compare<0, __i + 1, __j, _Tp, _Up>::__eq(__t, __u)); |
|
|
790 |
} |
|
|
791 |
|
|
|
792 |
static constexpr bool |
|
|
793 |
__less(const _Tp& __t, const _Up& __u) |
|
|
794 |
{ |
|
|
795 |
return ((get<__i>(__t) < get<__i>(__u)) |
|
|
796 |
|| !(get<__i>(__u) < get<__i>(__t)) && |
|
|
797 |
__tuple_compare<0, __i + 1, __j, _Tp, _Up>::__less(__t, __u)); |
|
|
798 |
} |
|
|
799 |
}; |
|
|
800 |
|
|
|
801 |
template |
|
|
802 |
struct __tuple_compare<0, __i, __i, _Tp, _Up> |
|
|
803 |
{ |
|
|
804 |
static constexpr bool |
|
|
805 |
__eq(const _Tp&, const _Up&) { return true; } |
|
|
806 |
|
|
|
807 |
static constexpr bool |
|
|
808 |
__less(const _Tp&, const _Up&) { return false; } |
|
|
809 |
}; |
|
|
810 |
|
|
|
811 |
template |
|
|
812 |
constexpr bool |
|
|
813 |
operator==(const tuple<_TElements...>& __t, |
|
|
814 |
const tuple<_UElements...>& __u) |
|
|
815 |
{ |
|
|
816 |
typedef tuple<_TElements...> _Tp; |
|
|
817 |
typedef tuple<_UElements...> _Up; |
|
|
818 |
return bool(__tuple_compare::value - tuple_size<_Up>::value, |
|
|
819 |
0, tuple_size<_Tp>::value, _Tp, _Up>::__eq(__t, __u)); |
|
|
820 |
} |
|
|
821 |
|
|
|
822 |
template |
|
|
823 |
constexpr bool |
|
|
824 |
operator<(const tuple<_TElements...>& __t, |
|
|
825 |
const tuple<_UElements...>& __u) |
|
|
826 |
{ |
|
|
827 |
typedef tuple<_TElements...> _Tp; |
|
|
828 |
typedef tuple<_UElements...> _Up; |
|
|
829 |
return bool(__tuple_compare::value - tuple_size<_Up>::value, |
|
|
830 |
0, tuple_size<_Tp>::value, _Tp, _Up>::__less(__t, __u)); |
|
|
831 |
} |
|
|
832 |
|
|
|
833 |
template |
|
|
834 |
inline constexpr bool |
|
|
835 |
operator!=(const tuple<_TElements...>& __t, |
|
|
836 |
const tuple<_UElements...>& __u) |
|
|
837 |
{ return !(__t == __u); } |
|
|
838 |
|
|
|
839 |
template |
|
|
840 |
inline constexpr bool |
|
|
841 |
operator>(const tuple<_TElements...>& __t, |
|
|
842 |
const tuple<_UElements...>& __u) |
|
|
843 |
{ return __u < __t; } |
|
|
844 |
|
|
|
845 |
template |
|
|
846 |
inline constexpr bool |
|
|
847 |
operator<=(const tuple<_TElements...>& __t, |
|
|
848 |
const tuple<_UElements...>& __u) |
|
|
849 |
{ return !(__u < __t); } |
|
|
850 |
|
|
|
851 |
template |
|
|
852 |
inline constexpr bool |
|
|
853 |
operator>=(const tuple<_TElements...>& __t, |
|
|
854 |
const tuple<_UElements...>& __u) |
|
|
855 |
{ return !(__t < __u); } |
|
|
856 |
|
|
|
857 |
// NB: DR 705. |
|
|
858 |
template |
|
|
859 |
constexpr tuple::__type...> |
|
|
860 |
make_tuple(_Elements&&... __args) |
|
|
861 |
{ |
|
|
862 |
typedef tuple::__type...> |
|
|
863 |
__result_type; |
|
|
864 |
return __result_type(std::forward<_Elements>(__args)...); |
|
|
865 |
} |
|
|
866 |
|
|
|
867 |
template |
|
|
868 |
tuple<_Elements&&...> |
|
|
869 |
forward_as_tuple(_Elements&&... __args) noexcept |
|
|
870 |
{ return tuple<_Elements&&...>(std::forward<_Elements>(__args)...); } |
|
|
871 |
|
|
|
872 |
template |
|
|
873 |
struct __is_tuple_like_impl : false_type |
|
|
874 |
{ }; |
|
|
875 |
|
|
|
876 |
template |
|
|
877 |
struct __is_tuple_like_impl> : true_type |
|
|
878 |
{ }; |
|
|
879 |
|
|
|
880 |
template |
|
|
881 |
struct __is_tuple_like_impl> : true_type |
|
|
882 |
{ }; |
|
|
883 |
|
|
|
884 |
template |
|
|
885 |
struct __is_tuple_like_impl> : true_type |
|
|
886 |
{ }; |
|
|
887 |
|
|
|
888 |
// Internal type trait that allows us to sfinae-protect tuple_cat. |
|
|
889 |
template |
|
|
890 |
struct __is_tuple_like |
|
|
891 |
: public __is_tuple_like_impl |
|
|
892 |
::type>::type>::type |
|
|
893 |
{ }; |
|
|
894 |
|
|
|
895 |
// Stores a tuple of indices. Also used by bind() to extract the elements |
|
|
896 |
// in a tuple. |
|
|
897 |
template |
|
|
898 |
struct _Index_tuple |
|
|
899 |
{ |
|
|
900 |
typedef _Index_tuple<_Indexes..., sizeof...(_Indexes)> __next; |
|
|
901 |
}; |
|
|
902 |
|
|
|
903 |
// Builds an _Index_tuple<0, 1, 2, ..., _Num-1>. |
|
|
904 |
template |
|
|
905 |
struct _Build_index_tuple |
|
|
906 |
{ |
|
|
907 |
typedef typename _Build_index_tuple<_Num - 1>::__type::__next __type; |
|
|
908 |
}; |
|
|
909 |
|
|
|
910 |
template<> |
|
|
911 |
struct _Build_index_tuple<0> |
|
|
912 |
{ |
|
|
913 |
typedef _Index_tuple<> __type; |
|
|
914 |
}; |
|
|
915 |
|
|
|
916 |
template |
|
|
917 |
struct __make_tuple_impl; |
|
|
918 |
|
|
|
919 |
template |
|
|
920 |
std::size_t _Nm> |
|
|
921 |
struct __make_tuple_impl<_Idx, tuple<_Tp...>, _Tuple, _Nm> |
|
|
922 |
{ |
|
|
923 |
typedef typename __make_tuple_impl<_Idx + 1, tuple<_Tp..., |
|
|
924 |
typename std::tuple_element<_Idx, _Tuple>::type>, _Tuple, _Nm>::__type |
|
|
925 |
__type; |
|
|
926 |
}; |
|
|
927 |
|
|
|
928 |
template |
|
|
929 |
struct __make_tuple_impl<_Nm, tuple<_Tp...>, _Tuple, _Nm> |
|
|
930 |
{ |
|
|
931 |
typedef tuple<_Tp...> __type; |
|
|
932 |
}; |
|
|
933 |
|
|
|
934 |
template |
|
|
935 |
struct __do_make_tuple |
|
|
936 |
: public __make_tuple_impl<0, tuple<>, _Tuple, |
|
|
937 |
std::tuple_size<_Tuple>::value> |
|
|
938 |
{ }; |
|
|
939 |
|
|
|
940 |
// Returns the std::tuple equivalent of a tuple-like type. |
|
|
941 |
template |
|
|
942 |
struct __make_tuple |
|
|
943 |
: public __do_make_tuple |
|
|
944 |
::type>::type> |
|
|
945 |
{ }; |
|
|
946 |
|
|
|
947 |
// Combines several std::tuple's into a single one. |
|
|
948 |
template |
|
|
949 |
struct __combine_tuples; |
|
|
950 |
|
|
|
951 |
template<> |
|
|
952 |
struct __combine_tuples<> |
|
|
953 |
{ |
|
|
954 |
typedef tuple<> __type; |
|
|
955 |
}; |
|
|
956 |
|
|
|
957 |
template |
|
|
958 |
struct __combine_tuples> |
|
|
959 |
{ |
|
|
960 |
typedef tuple<_Ts...> __type; |
|
|
961 |
}; |
|
|
962 |
|
|
|
963 |
template |
|
|
964 |
struct __combine_tuples, tuple<_T2s...>, _Rem...> |
|
|
965 |
{ |
|
|
966 |
typedef typename __combine_tuples, |
|
|
967 |
_Rem...>::__type __type; |
|
|
968 |
}; |
|
|
969 |
|
|
|
970 |
// Computes the result type of tuple_cat given a set of tuple-like types. |
|
|
971 |
template |
|
|
972 |
struct __tuple_cat_result |
|
|
973 |
{ |
|
|
974 |
typedef typename __combine_tuples |
|
|
975 |
::__type...>::__type __type; |
|
|
976 |
}; |
|
|
977 |
|
|
|
978 |
// Helper to determine the index set for the first tuple-like |
|
|
979 |
// type of a given set. |
|
|
980 |
template |
|
|
981 |
struct __make_1st_indices; |
|
|
982 |
|
|
|
983 |
template<> |
|
|
984 |
struct __make_1st_indices<> |
|
|
985 |
{ |
|
|
986 |
typedef std::_Index_tuple<> __type; |
|
|
987 |
}; |
|
|
988 |
|
|
|
989 |
template |
|
|
990 |
struct __make_1st_indices<_Tp, _Tpls...> |
|
|
991 |
{ |
|
|
992 |
typedef typename std::_Build_index_tuple |
|
|
993 |
typename std::remove_reference<_Tp>::type>::value>::__type __type; |
|
|
994 |
}; |
|
|
995 |
|
|
|
996 |
// Performs the actual concatenation by step-wise expanding tuple-like |
|
|
997 |
// objects into the elements, which are finally forwarded into the |
|
|
998 |
// result tuple. |
|
|
999 |
template |
|
|
1000 |
struct __tuple_concater; |
|
|
1001 |
|
|
|
1002 |
template |
|
|
1003 |
struct __tuple_concater<_Ret, std::_Index_tuple<_Is...>, _Tp, _Tpls...> |
|
|
1004 |
{ |
|
|
1005 |
template |
|
|
1006 |
static constexpr _Ret |
|
|
1007 |
_S_do(_Tp&& __tp, _Tpls&&... __tps, _Us&&... __us) |
|
|
1008 |
{ |
|
|
1009 |
typedef typename __make_1st_indices<_Tpls...>::__type __idx; |
|
|
1010 |
typedef __tuple_concater<_Ret, __idx, _Tpls...> __next; |
|
|
1011 |
return __next::_S_do(std::forward<_Tpls>(__tps)..., |
|
|
1012 |
std::forward<_Us>(__us)..., |
|
|
1013 |
std::get<_Is>(std::forward<_Tp>(__tp))...); |
|
|
1014 |
} |
|
|
1015 |
}; |
|
|
1016 |
|
|
|
1017 |
template |
|
|
1018 |
struct __tuple_concater<_Ret, std::_Index_tuple<>> |
|
|
1019 |
{ |
|
|
1020 |
template |
|
|
1021 |
static constexpr _Ret |
|
|
1022 |
_S_do(_Us&&... __us) |
|
|
1023 |
{ |
|
|
1024 |
return _Ret(std::forward<_Us>(__us)...); |
|
|
1025 |
} |
|
|
1026 |
}; |
|
|
1027 |
|
|
|
1028 |
/// tuple_cat |
|
|
1029 |
template |
|
|
1030 |
enable_if<__and_<__is_tuple_like<_Tpls>...>::value>::type> |
|
|
1031 |
constexpr auto |
|
|
1032 |
tuple_cat(_Tpls&&... __tpls) |
|
|
1033 |
-> typename __tuple_cat_result<_Tpls...>::__type |
|
|
1034 |
{ |
|
|
1035 |
typedef typename __tuple_cat_result<_Tpls...>::__type __ret; |
|
|
1036 |
typedef typename __make_1st_indices<_Tpls...>::__type __idx; |
|
|
1037 |
typedef __tuple_concater<__ret, __idx, _Tpls...> __concater; |
|
|
1038 |
return __concater::_S_do(std::forward<_Tpls>(__tpls)...); |
|
|
1039 |
} |
|
|
1040 |
|
|
|
1041 |
/// tie |
|
|
1042 |
template |
|
|
1043 |
inline tuple<_Elements&...> |
|
|
1044 |
tie(_Elements&... __args) noexcept |
|
|
1045 |
{ return tuple<_Elements&...>(__args...); } |
|
|
1046 |
|
|
|
1047 |
/// swap |
|
|
1048 |
template |
|
|
1049 |
inline void |
|
|
1050 |
swap(tuple<_Elements...>& __x, tuple<_Elements...>& __y) |
|
|
1051 |
noexcept(noexcept(__x.swap(__y))) |
|
|
1052 |
{ __x.swap(__y); } |
|
|
1053 |
|
|
|
1054 |
// A class (and instance) which can be used in 'tie' when an element |
|
|
1055 |
// of a tuple is not required |
|
|
1056 |
struct _Swallow_assign |
|
|
1057 |
{ |
|
|
1058 |
template |
|
|
1059 |
const _Swallow_assign& |
|
|
1060 |
operator=(const _Tp&) const |
|
|
1061 |
{ return *this; } |
|
|
1062 |
}; |
|
|
1063 |
|
|
|
1064 |
const _Swallow_assign ignore{}; |
|
|
1065 |
|
|
|
1066 |
/// Partial specialization for tuples |
|
|
1067 |
template |
|
|
1068 |
struct uses_allocator, _Alloc> : true_type { }; |
|
|
1069 |
|
|
|
1070 |
// See stl_pair.h... |
|
|
1071 |
template |
|
|
1072 |
template |
|
|
1073 |
inline |
|
|
1074 |
pair<_T1, _T2>:: |
|
|
1075 |
pair(piecewise_construct_t, |
|
|
1076 |
tuple<_Args1...> __first, tuple<_Args2...> __second) |
|
|
1077 |
: pair(__first, __second, |
|
|
1078 |
typename _Build_index_tuple::__type(), |
|
|
1079 |
typename _Build_index_tuple::__type()) |
|
|
1080 |
{ } |
|
|
1081 |
|
|
|
1082 |
template |
|
|
1083 |
template |
|
|
1084 |
typename... _Args2, std::size_t... _Indexes2> |
|
|
1085 |
inline |
|
|
1086 |
pair<_T1, _T2>:: |
|
|
1087 |
pair(tuple<_Args1...>& __tuple1, tuple<_Args2...>& __tuple2, |
|
|
1088 |
_Index_tuple<_Indexes1...>, _Index_tuple<_Indexes2...>) |
|
|
1089 |
: first(std::forward<_Args1>(std::get<_Indexes1>(__tuple1))...), |
|
|
1090 |
second(std::forward<_Args2>(std::get<_Indexes2>(__tuple2))...) |
|
|
1091 |
{ } |
|
|
1092 |
|
|
|
1093 |
/// @} |
|
|
1094 |
|
|
|
1095 |
_GLIBCXX_END_NAMESPACE_VERSION |
|
|
1096 |
} // namespace std |
|
|
1097 |
|
|
|
1098 |
#endif // C++11 |
|
|
1099 |
|
|
|
1100 |
#endif // _GLIBCXX_TUPLE |