b8806796ec
This defines all the __cpp_lib_xxx macros as type long, as required by the standard. We had an inconsistent mix of int and long, sometimes even for the same macro name. The __cpp_lib_experimental_xxx macros are left as type int, because that's what it says in the relevant TS specs. libstdc++-v3/ChangeLog: PR libstdc++/87193 PR libstdc++/104019 * include/bits/alloc_traits.h (__cpp_lib_allocator_traits_is_always_equal): Define as type long. * include/bits/allocator.h (__cpp_lib_incomplete_container_elements): Likewise. * include/bits/basic_string.h (__cpp_lib_string_udls): Likewise. * include/bits/chrono.h (__cpp_lib_chrono): Likewise. (__cpp_lib_chrono_udls): Likewise. * include/bits/move.h (__cpp_lib_addressof_constexpr): Likewise. * include/bits/node_handle.h (__cpp_lib_node_extract): Likewise. * include/bits/range_access.h (__cpp_lib_nonmember_container_access): Likewise. * include/bits/shared_ptr.h (__cpp_lib_enable_shared_from_this): Likewise. * include/bits/stl_algo.h (__cpp_lib_clamp): Likewise. (__cpp_lib_sample): Likewise. * include/bits/stl_algobase.h (__cpp_lib_robust_nonmodifying_seq_ops): Likewise. * include/bits/stl_function.h (__cpp_lib_transparent_operators): Likewise. * include/bits/stl_iterator.h (__cpp_lib_make_reverse_iterator): Likewise. * include/bits/stl_map.h (__cpp_lib_map_try_emplace): Likewise. * include/bits/stl_tree.h (__cpp_lib_generic_associative_lookup): Likewise. * include/bits/unique_ptr.h (__cpp_lib_make_unique): Likewise. * include/bits/unordered_map.h (__cpp_lib_unordered_map_try_emplace): Likewise. * include/c_global/cmath (__cpp_lib_hypot): Likewise. * include/c_global/cstddef (__cpp_lib_byte): Likewise. * include/std/atomic (__cpp_lib_atomic_is_always_lock_free): Likewise. * include/std/complex (__cpp_lib_complex_udls): Likewise. * include/std/filesystem (__cpp_lib_filesystem): Likewise. * include/std/functional (__cpp_lib_not_fn): Likewise. (__cpp_lib_boyer_moore_searcher): Likewise. * include/std/iomanip (__cpp_lib_quoted_string_io): Likewise. * include/std/mutex (__cpp_lib_scoped_lock): Likewise. * include/std/numeric (__cpp_lib_gcd_lcm): Likewise. (__cpp_lib_gcd, __cpp_lib_lcm): Likewise. * include/std/tuple (__cpp_lib_apply): Likewise. (__cpp_lib_make_from_tuple): Likewise. * include/std/type_traits (__cpp_lib_integral_constant_callable) (__cpp_lib_bool_constant, __cpp_lib_logical_traits) (__cpp_lib_is_null_pointer, __cpp_lib_transformation_trait_aliases) (__cpp_lib_result_of_sfinae, __cpp_lib_void_t) (__cpp_lib_is_swappable, __cpp_lib_is_invocable) (__cpp_lib_has_unique_object_representations) (__cpp_lib_is_aggregate): Likewise. * include/std/version: Likewise. * libsupc++/new (__cpp_lib_launder): Likewise.
1894 lines
61 KiB
C++
1894 lines
61 KiB
C++
// <tuple> -*- C++ -*-
|
|
|
|
// Copyright (C) 2007-2022 Free Software Foundation, Inc.
|
|
//
|
|
// This file is part of the GNU ISO C++ Library. This library is free
|
|
// software; you can redistribute it and/or modify it under the
|
|
// terms of the GNU General Public License as published by the
|
|
// Free Software Foundation; either version 3, or (at your option)
|
|
// any later version.
|
|
|
|
// This library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
|
|
// Under Section 7 of GPL version 3, you are granted additional
|
|
// permissions described in the GCC Runtime Library Exception, version
|
|
// 3.1, as published by the Free Software Foundation.
|
|
|
|
// You should have received a copy of the GNU General Public License and
|
|
// a copy of the GCC Runtime Library Exception along with this program;
|
|
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
|
// <http://www.gnu.org/licenses/>.
|
|
|
|
/** @file include/tuple
|
|
* This is a Standard C++ Library header.
|
|
*/
|
|
|
|
#ifndef _GLIBCXX_TUPLE
|
|
#define _GLIBCXX_TUPLE 1
|
|
|
|
#pragma GCC system_header
|
|
|
|
#if __cplusplus < 201103L
|
|
# include <bits/c++0x_warning.h>
|
|
#else
|
|
|
|
#include <bits/stl_pair.h> // for std::pair
|
|
#include <bits/uses_allocator.h> // for std::allocator_arg_t
|
|
#include <bits/utility.h> // for std::get, std::tuple_size etc.
|
|
#include <bits/invoke.h> // for std::__invoke
|
|
#if __cplusplus > 201703L
|
|
# include <compare>
|
|
# define __cpp_lib_constexpr_tuple 201811L
|
|
#endif
|
|
|
|
namespace std _GLIBCXX_VISIBILITY(default)
|
|
{
|
|
_GLIBCXX_BEGIN_NAMESPACE_VERSION
|
|
|
|
/**
|
|
* @addtogroup utilities
|
|
* @{
|
|
*/
|
|
|
|
template<typename... _Elements>
|
|
class tuple;
|
|
|
|
template<typename _Tp>
|
|
struct __is_empty_non_tuple : is_empty<_Tp> { };
|
|
|
|
// Using EBO for elements that are tuples causes ambiguous base errors.
|
|
template<typename _El0, typename... _El>
|
|
struct __is_empty_non_tuple<tuple<_El0, _El...>> : false_type { };
|
|
|
|
// Use the Empty Base-class Optimization for empty, non-final types.
|
|
template<typename _Tp>
|
|
using __empty_not_final
|
|
= __conditional_t<__is_final(_Tp), false_type,
|
|
__is_empty_non_tuple<_Tp>>;
|
|
|
|
template<size_t _Idx, typename _Head,
|
|
bool = __empty_not_final<_Head>::value>
|
|
struct _Head_base;
|
|
|
|
#if __has_cpp_attribute(__no_unique_address__)
|
|
template<size_t _Idx, typename _Head>
|
|
struct _Head_base<_Idx, _Head, true>
|
|
{
|
|
constexpr _Head_base()
|
|
: _M_head_impl() { }
|
|
|
|
constexpr _Head_base(const _Head& __h)
|
|
: _M_head_impl(__h) { }
|
|
|
|
constexpr _Head_base(const _Head_base&) = default;
|
|
constexpr _Head_base(_Head_base&&) = default;
|
|
|
|
template<typename _UHead>
|
|
constexpr _Head_base(_UHead&& __h)
|
|
: _M_head_impl(std::forward<_UHead>(__h)) { }
|
|
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Head_base(allocator_arg_t, __uses_alloc0)
|
|
: _M_head_impl() { }
|
|
|
|
template<typename _Alloc>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Head_base(allocator_arg_t, __uses_alloc1<_Alloc> __a)
|
|
: _M_head_impl(allocator_arg, *__a._M_a) { }
|
|
|
|
template<typename _Alloc>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Head_base(allocator_arg_t, __uses_alloc2<_Alloc> __a)
|
|
: _M_head_impl(*__a._M_a) { }
|
|
|
|
template<typename _UHead>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Head_base(__uses_alloc0, _UHead&& __uhead)
|
|
: _M_head_impl(std::forward<_UHead>(__uhead)) { }
|
|
|
|
template<typename _Alloc, typename _UHead>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_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>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Head_base(__uses_alloc2<_Alloc> __a, _UHead&& __uhead)
|
|
: _M_head_impl(std::forward<_UHead>(__uhead), *__a._M_a) { }
|
|
|
|
static constexpr _Head&
|
|
_M_head(_Head_base& __b) noexcept { return __b._M_head_impl; }
|
|
|
|
static constexpr const _Head&
|
|
_M_head(const _Head_base& __b) noexcept { return __b._M_head_impl; }
|
|
|
|
[[__no_unique_address__]] _Head _M_head_impl;
|
|
};
|
|
#else
|
|
template<size_t _Idx, typename _Head>
|
|
struct _Head_base<_Idx, _Head, true>
|
|
: public _Head
|
|
{
|
|
constexpr _Head_base()
|
|
: _Head() { }
|
|
|
|
constexpr _Head_base(const _Head& __h)
|
|
: _Head(__h) { }
|
|
|
|
constexpr _Head_base(const _Head_base&) = default;
|
|
constexpr _Head_base(_Head_base&&) = default;
|
|
|
|
template<typename _UHead>
|
|
constexpr _Head_base(_UHead&& __h)
|
|
: _Head(std::forward<_UHead>(__h)) { }
|
|
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Head_base(allocator_arg_t, __uses_alloc0)
|
|
: _Head() { }
|
|
|
|
template<typename _Alloc>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Head_base(allocator_arg_t, __uses_alloc1<_Alloc> __a)
|
|
: _Head(allocator_arg, *__a._M_a) { }
|
|
|
|
template<typename _Alloc>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Head_base(allocator_arg_t, __uses_alloc2<_Alloc> __a)
|
|
: _Head(*__a._M_a) { }
|
|
|
|
template<typename _UHead>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Head_base(__uses_alloc0, _UHead&& __uhead)
|
|
: _Head(std::forward<_UHead>(__uhead)) { }
|
|
|
|
template<typename _Alloc, typename _UHead>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Head_base(__uses_alloc1<_Alloc> __a, _UHead&& __uhead)
|
|
: _Head(allocator_arg, *__a._M_a, std::forward<_UHead>(__uhead)) { }
|
|
|
|
template<typename _Alloc, typename _UHead>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Head_base(__uses_alloc2<_Alloc> __a, _UHead&& __uhead)
|
|
: _Head(std::forward<_UHead>(__uhead), *__a._M_a) { }
|
|
|
|
static constexpr _Head&
|
|
_M_head(_Head_base& __b) noexcept { return __b; }
|
|
|
|
static constexpr const _Head&
|
|
_M_head(const _Head_base& __b) noexcept { return __b; }
|
|
};
|
|
#endif
|
|
|
|
template<size_t _Idx, typename _Head>
|
|
struct _Head_base<_Idx, _Head, false>
|
|
{
|
|
constexpr _Head_base()
|
|
: _M_head_impl() { }
|
|
|
|
constexpr _Head_base(const _Head& __h)
|
|
: _M_head_impl(__h) { }
|
|
|
|
constexpr _Head_base(const _Head_base&) = default;
|
|
constexpr _Head_base(_Head_base&&) = default;
|
|
|
|
template<typename _UHead>
|
|
constexpr _Head_base(_UHead&& __h)
|
|
: _M_head_impl(std::forward<_UHead>(__h)) { }
|
|
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Head_base(allocator_arg_t, __uses_alloc0)
|
|
: _M_head_impl() { }
|
|
|
|
template<typename _Alloc>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Head_base(allocator_arg_t, __uses_alloc1<_Alloc> __a)
|
|
: _M_head_impl(allocator_arg, *__a._M_a) { }
|
|
|
|
template<typename _Alloc>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Head_base(allocator_arg_t, __uses_alloc2<_Alloc> __a)
|
|
: _M_head_impl(*__a._M_a) { }
|
|
|
|
template<typename _UHead>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Head_base(__uses_alloc0, _UHead&& __uhead)
|
|
: _M_head_impl(std::forward<_UHead>(__uhead)) { }
|
|
|
|
template<typename _Alloc, typename _UHead>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_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>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Head_base(__uses_alloc2<_Alloc> __a, _UHead&& __uhead)
|
|
: _M_head_impl(std::forward<_UHead>(__uhead), *__a._M_a) { }
|
|
|
|
static constexpr _Head&
|
|
_M_head(_Head_base& __b) noexcept { return __b._M_head_impl; }
|
|
|
|
static constexpr const _Head&
|
|
_M_head(const _Head_base& __b) noexcept { return __b._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<size_t _Idx, typename... _Elements>
|
|
struct _Tuple_impl;
|
|
|
|
/**
|
|
* 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<size_t _Idx, typename _Head, typename... _Tail>
|
|
struct _Tuple_impl<_Idx, _Head, _Tail...>
|
|
: public _Tuple_impl<_Idx + 1, _Tail...>,
|
|
private _Head_base<_Idx, _Head>
|
|
{
|
|
template<size_t, typename...> friend struct _Tuple_impl;
|
|
|
|
typedef _Tuple_impl<_Idx + 1, _Tail...> _Inherited;
|
|
typedef _Head_base<_Idx, _Head> _Base;
|
|
|
|
static constexpr _Head&
|
|
_M_head(_Tuple_impl& __t) noexcept { return _Base::_M_head(__t); }
|
|
|
|
static constexpr const _Head&
|
|
_M_head(const _Tuple_impl& __t) noexcept { return _Base::_M_head(__t); }
|
|
|
|
static constexpr _Inherited&
|
|
_M_tail(_Tuple_impl& __t) noexcept { return __t; }
|
|
|
|
static constexpr const _Inherited&
|
|
_M_tail(const _Tuple_impl& __t) noexcept { return __t; }
|
|
|
|
constexpr _Tuple_impl()
|
|
: _Inherited(), _Base() { }
|
|
|
|
explicit constexpr
|
|
_Tuple_impl(const _Head& __head, const _Tail&... __tail)
|
|
: _Inherited(__tail...), _Base(__head)
|
|
{ }
|
|
|
|
template<typename _UHead, typename... _UTail,
|
|
typename = __enable_if_t<sizeof...(_Tail) == sizeof...(_UTail)>>
|
|
explicit constexpr
|
|
_Tuple_impl(_UHead&& __head, _UTail&&... __tail)
|
|
: _Inherited(std::forward<_UTail>(__tail)...),
|
|
_Base(std::forward<_UHead>(__head))
|
|
{ }
|
|
|
|
constexpr _Tuple_impl(const _Tuple_impl&) = default;
|
|
|
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS
|
|
// 2729. Missing SFINAE on std::pair::operator=
|
|
_Tuple_impl& operator=(const _Tuple_impl&) = delete;
|
|
|
|
_Tuple_impl(_Tuple_impl&&) = default;
|
|
|
|
template<typename... _UElements>
|
|
constexpr
|
|
_Tuple_impl(const _Tuple_impl<_Idx, _UElements...>& __in)
|
|
: _Inherited(_Tuple_impl<_Idx, _UElements...>::_M_tail(__in)),
|
|
_Base(_Tuple_impl<_Idx, _UElements...>::_M_head(__in))
|
|
{ }
|
|
|
|
template<typename _UHead, typename... _UTails>
|
|
constexpr
|
|
_Tuple_impl(_Tuple_impl<_Idx, _UHead, _UTails...>&& __in)
|
|
: _Inherited(std::move
|
|
(_Tuple_impl<_Idx, _UHead, _UTails...>::_M_tail(__in))),
|
|
_Base(std::forward<_UHead>
|
|
(_Tuple_impl<_Idx, _UHead, _UTails...>::_M_head(__in)))
|
|
{ }
|
|
|
|
template<typename _Alloc>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Tuple_impl(allocator_arg_t __tag, const _Alloc& __a)
|
|
: _Inherited(__tag, __a),
|
|
_Base(__tag, __use_alloc<_Head>(__a))
|
|
{ }
|
|
|
|
template<typename _Alloc>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_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 = __enable_if_t<sizeof...(_Tail) == sizeof...(_UTail)>>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_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>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Tuple_impl(allocator_arg_t __tag, const _Alloc& __a,
|
|
const _Tuple_impl& __in)
|
|
: _Inherited(__tag, __a, _M_tail(__in)),
|
|
_Base(__use_alloc<_Head, _Alloc, _Head>(__a), _M_head(__in))
|
|
{ }
|
|
|
|
template<typename _Alloc>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Tuple_impl(allocator_arg_t __tag, const _Alloc& __a,
|
|
_Tuple_impl&& __in)
|
|
: _Inherited(__tag, __a, std::move(_M_tail(__in))),
|
|
_Base(__use_alloc<_Head, _Alloc, _Head>(__a),
|
|
std::forward<_Head>(_M_head(__in)))
|
|
{ }
|
|
|
|
template<typename _Alloc, typename _UHead, typename... _UTails>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Tuple_impl(allocator_arg_t __tag, const _Alloc& __a,
|
|
const _Tuple_impl<_Idx, _UHead, _UTails...>& __in)
|
|
: _Inherited(__tag, __a,
|
|
_Tuple_impl<_Idx, _UHead, _UTails...>::_M_tail(__in)),
|
|
_Base(__use_alloc<_Head, _Alloc, const _UHead&>(__a),
|
|
_Tuple_impl<_Idx, _UHead, _UTails...>::_M_head(__in))
|
|
{ }
|
|
|
|
template<typename _Alloc, typename _UHead, typename... _UTails>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Tuple_impl(allocator_arg_t __tag, const _Alloc& __a,
|
|
_Tuple_impl<_Idx, _UHead, _UTails...>&& __in)
|
|
: _Inherited(__tag, __a, std::move
|
|
(_Tuple_impl<_Idx, _UHead, _UTails...>::_M_tail(__in))),
|
|
_Base(__use_alloc<_Head, _Alloc, _UHead>(__a),
|
|
std::forward<_UHead>
|
|
(_Tuple_impl<_Idx, _UHead, _UTails...>::_M_head(__in)))
|
|
{ }
|
|
|
|
template<typename... _UElements>
|
|
_GLIBCXX20_CONSTEXPR
|
|
void
|
|
_M_assign(const _Tuple_impl<_Idx, _UElements...>& __in)
|
|
{
|
|
_M_head(*this) = _Tuple_impl<_Idx, _UElements...>::_M_head(__in);
|
|
_M_tail(*this)._M_assign(
|
|
_Tuple_impl<_Idx, _UElements...>::_M_tail(__in));
|
|
}
|
|
|
|
template<typename _UHead, typename... _UTails>
|
|
_GLIBCXX20_CONSTEXPR
|
|
void
|
|
_M_assign(_Tuple_impl<_Idx, _UHead, _UTails...>&& __in)
|
|
{
|
|
_M_head(*this) = std::forward<_UHead>
|
|
(_Tuple_impl<_Idx, _UHead, _UTails...>::_M_head(__in));
|
|
_M_tail(*this)._M_assign(
|
|
std::move(_Tuple_impl<_Idx, _UHead, _UTails...>::_M_tail(__in)));
|
|
}
|
|
|
|
protected:
|
|
_GLIBCXX20_CONSTEXPR
|
|
void
|
|
_M_swap(_Tuple_impl& __in)
|
|
{
|
|
using std::swap;
|
|
swap(_M_head(*this), _M_head(__in));
|
|
_Inherited::_M_swap(_M_tail(__in));
|
|
}
|
|
};
|
|
|
|
// Basis case of inheritance recursion.
|
|
template<size_t _Idx, typename _Head>
|
|
struct _Tuple_impl<_Idx, _Head>
|
|
: private _Head_base<_Idx, _Head>
|
|
{
|
|
template<size_t, typename...> friend struct _Tuple_impl;
|
|
|
|
typedef _Head_base<_Idx, _Head> _Base;
|
|
|
|
static constexpr _Head&
|
|
_M_head(_Tuple_impl& __t) noexcept { return _Base::_M_head(__t); }
|
|
|
|
static constexpr const _Head&
|
|
_M_head(const _Tuple_impl& __t) noexcept { return _Base::_M_head(__t); }
|
|
|
|
constexpr
|
|
_Tuple_impl()
|
|
: _Base() { }
|
|
|
|
explicit constexpr
|
|
_Tuple_impl(const _Head& __head)
|
|
: _Base(__head)
|
|
{ }
|
|
|
|
template<typename _UHead>
|
|
explicit constexpr
|
|
_Tuple_impl(_UHead&& __head)
|
|
: _Base(std::forward<_UHead>(__head))
|
|
{ }
|
|
|
|
constexpr _Tuple_impl(const _Tuple_impl&) = default;
|
|
|
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS
|
|
// 2729. Missing SFINAE on std::pair::operator=
|
|
_Tuple_impl& operator=(const _Tuple_impl&) = delete;
|
|
|
|
#if _GLIBCXX_INLINE_VERSION
|
|
_Tuple_impl(_Tuple_impl&&) = default;
|
|
#else
|
|
constexpr
|
|
_Tuple_impl(_Tuple_impl&& __in)
|
|
noexcept(is_nothrow_move_constructible<_Head>::value)
|
|
: _Base(static_cast<_Base&&>(__in))
|
|
{ }
|
|
#endif
|
|
|
|
template<typename _UHead>
|
|
constexpr
|
|
_Tuple_impl(const _Tuple_impl<_Idx, _UHead>& __in)
|
|
: _Base(_Tuple_impl<_Idx, _UHead>::_M_head(__in))
|
|
{ }
|
|
|
|
template<typename _UHead>
|
|
constexpr
|
|
_Tuple_impl(_Tuple_impl<_Idx, _UHead>&& __in)
|
|
: _Base(std::forward<_UHead>(_Tuple_impl<_Idx, _UHead>::_M_head(__in)))
|
|
{ }
|
|
|
|
template<typename _Alloc>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Tuple_impl(allocator_arg_t __tag, const _Alloc& __a)
|
|
: _Base(__tag, __use_alloc<_Head>(__a))
|
|
{ }
|
|
|
|
template<typename _Alloc>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Tuple_impl(allocator_arg_t __tag, const _Alloc& __a,
|
|
const _Head& __head)
|
|
: _Base(__use_alloc<_Head, _Alloc, const _Head&>(__a), __head)
|
|
{ }
|
|
|
|
template<typename _Alloc, typename _UHead>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Tuple_impl(allocator_arg_t __tag, const _Alloc& __a,
|
|
_UHead&& __head)
|
|
: _Base(__use_alloc<_Head, _Alloc, _UHead>(__a),
|
|
std::forward<_UHead>(__head))
|
|
{ }
|
|
|
|
template<typename _Alloc>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Tuple_impl(allocator_arg_t __tag, const _Alloc& __a,
|
|
const _Tuple_impl& __in)
|
|
: _Base(__use_alloc<_Head, _Alloc, const _Head&>(__a), _M_head(__in))
|
|
{ }
|
|
|
|
template<typename _Alloc>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Tuple_impl(allocator_arg_t __tag, const _Alloc& __a,
|
|
_Tuple_impl&& __in)
|
|
: _Base(__use_alloc<_Head, _Alloc, _Head>(__a),
|
|
std::forward<_Head>(_M_head(__in)))
|
|
{ }
|
|
|
|
template<typename _Alloc, typename _UHead>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Tuple_impl(allocator_arg_t __tag, const _Alloc& __a,
|
|
const _Tuple_impl<_Idx, _UHead>& __in)
|
|
: _Base(__use_alloc<_Head, _Alloc, const _UHead&>(__a),
|
|
_Tuple_impl<_Idx, _UHead>::_M_head(__in))
|
|
{ }
|
|
|
|
template<typename _Alloc, typename _UHead>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Tuple_impl(allocator_arg_t __tag, const _Alloc& __a,
|
|
_Tuple_impl<_Idx, _UHead>&& __in)
|
|
: _Base(__use_alloc<_Head, _Alloc, _UHead>(__a),
|
|
std::forward<_UHead>(_Tuple_impl<_Idx, _UHead>::_M_head(__in)))
|
|
{ }
|
|
|
|
template<typename _UHead>
|
|
_GLIBCXX20_CONSTEXPR
|
|
void
|
|
_M_assign(const _Tuple_impl<_Idx, _UHead>& __in)
|
|
{
|
|
_M_head(*this) = _Tuple_impl<_Idx, _UHead>::_M_head(__in);
|
|
}
|
|
|
|
template<typename _UHead>
|
|
_GLIBCXX20_CONSTEXPR
|
|
void
|
|
_M_assign(_Tuple_impl<_Idx, _UHead>&& __in)
|
|
{
|
|
_M_head(*this)
|
|
= std::forward<_UHead>(_Tuple_impl<_Idx, _UHead>::_M_head(__in));
|
|
}
|
|
|
|
protected:
|
|
_GLIBCXX20_CONSTEXPR
|
|
void
|
|
_M_swap(_Tuple_impl& __in)
|
|
{
|
|
using std::swap;
|
|
swap(_M_head(*this), _M_head(__in));
|
|
}
|
|
};
|
|
|
|
// Concept utility functions, reused in conditionally-explicit
|
|
// constructors.
|
|
template<bool, typename... _Types>
|
|
struct _TupleConstraints
|
|
{
|
|
// Constraint for a non-explicit constructor.
|
|
// True iff each Ti in _Types... can be constructed from Ui in _UTypes...
|
|
// and every Ui is implicitly convertible to Ti.
|
|
template<typename... _UTypes>
|
|
static constexpr bool __is_implicitly_constructible()
|
|
{
|
|
return __and_<is_constructible<_Types, _UTypes>...,
|
|
is_convertible<_UTypes, _Types>...
|
|
>::value;
|
|
}
|
|
|
|
// Constraint for a non-explicit constructor.
|
|
// True iff each Ti in _Types... can be constructed from Ui in _UTypes...
|
|
// but not every Ui is implicitly convertible to Ti.
|
|
template<typename... _UTypes>
|
|
static constexpr bool __is_explicitly_constructible()
|
|
{
|
|
return __and_<is_constructible<_Types, _UTypes>...,
|
|
__not_<__and_<is_convertible<_UTypes, _Types>...>>
|
|
>::value;
|
|
}
|
|
|
|
static constexpr bool __is_implicitly_default_constructible()
|
|
{
|
|
return __and_<std::__is_implicitly_default_constructible<_Types>...
|
|
>::value;
|
|
}
|
|
|
|
static constexpr bool __is_explicitly_default_constructible()
|
|
{
|
|
return __and_<is_default_constructible<_Types>...,
|
|
__not_<__and_<
|
|
std::__is_implicitly_default_constructible<_Types>...>
|
|
>>::value;
|
|
}
|
|
};
|
|
|
|
// Partial specialization used when a required precondition isn't met,
|
|
// e.g. when sizeof...(_Types) != sizeof...(_UTypes).
|
|
template<typename... _Types>
|
|
struct _TupleConstraints<false, _Types...>
|
|
{
|
|
template<typename... _UTypes>
|
|
static constexpr bool __is_implicitly_constructible()
|
|
{ return false; }
|
|
|
|
template<typename... _UTypes>
|
|
static constexpr bool __is_explicitly_constructible()
|
|
{ return false; }
|
|
};
|
|
|
|
/// Primary class template, tuple
|
|
template<typename... _Elements>
|
|
class tuple : public _Tuple_impl<0, _Elements...>
|
|
{
|
|
typedef _Tuple_impl<0, _Elements...> _Inherited;
|
|
|
|
template<bool _Cond>
|
|
using _TCC = _TupleConstraints<_Cond, _Elements...>;
|
|
|
|
// Constraint for non-explicit default constructor
|
|
template<bool _Dummy>
|
|
using _ImplicitDefaultCtor = __enable_if_t<
|
|
_TCC<_Dummy>::__is_implicitly_default_constructible(),
|
|
bool>;
|
|
|
|
// Constraint for explicit default constructor
|
|
template<bool _Dummy>
|
|
using _ExplicitDefaultCtor = __enable_if_t<
|
|
_TCC<_Dummy>::__is_explicitly_default_constructible(),
|
|
bool>;
|
|
|
|
// Constraint for non-explicit constructors
|
|
template<bool _Cond, typename... _Args>
|
|
using _ImplicitCtor = __enable_if_t<
|
|
_TCC<_Cond>::template __is_implicitly_constructible<_Args...>(),
|
|
bool>;
|
|
|
|
// Constraint for non-explicit constructors
|
|
template<bool _Cond, typename... _Args>
|
|
using _ExplicitCtor = __enable_if_t<
|
|
_TCC<_Cond>::template __is_explicitly_constructible<_Args...>(),
|
|
bool>;
|
|
|
|
template<typename... _UElements>
|
|
static constexpr
|
|
__enable_if_t<sizeof...(_UElements) == sizeof...(_Elements), bool>
|
|
__assignable()
|
|
{ return __and_<is_assignable<_Elements&, _UElements>...>::value; }
|
|
|
|
// Condition for noexcept-specifier of an assignment operator.
|
|
template<typename... _UElements>
|
|
static constexpr bool __nothrow_assignable()
|
|
{
|
|
return
|
|
__and_<is_nothrow_assignable<_Elements&, _UElements>...>::value;
|
|
}
|
|
|
|
// Condition for noexcept-specifier of a constructor.
|
|
template<typename... _UElements>
|
|
static constexpr bool __nothrow_constructible()
|
|
{
|
|
return
|
|
__and_<is_nothrow_constructible<_Elements, _UElements>...>::value;
|
|
}
|
|
|
|
// Constraint for tuple(_UTypes&&...) where sizeof...(_UTypes) == 1.
|
|
template<typename _Up>
|
|
static constexpr bool __valid_args()
|
|
{
|
|
return sizeof...(_Elements) == 1
|
|
&& !is_same<tuple, __remove_cvref_t<_Up>>::value;
|
|
}
|
|
|
|
// Constraint for tuple(_UTypes&&...) where sizeof...(_UTypes) > 1.
|
|
template<typename, typename, typename... _Tail>
|
|
static constexpr bool __valid_args()
|
|
{ return (sizeof...(_Tail) + 2) == sizeof...(_Elements); }
|
|
|
|
/* Constraint for constructors with a tuple<UTypes...> parameter ensures
|
|
* that the constructor is only viable when it would not interfere with
|
|
* tuple(UTypes&&...) or tuple(const tuple&) or tuple(tuple&&).
|
|
* Such constructors are only viable if:
|
|
* either sizeof...(Types) != 1,
|
|
* or (when Types... expands to T and UTypes... expands to U)
|
|
* is_convertible_v<TUPLE, T>, is_constructible_v<T, TUPLE>,
|
|
* and is_same_v<T, U> are all false.
|
|
*/
|
|
template<typename _Tuple, typename = tuple,
|
|
typename = __remove_cvref_t<_Tuple>>
|
|
struct _UseOtherCtor
|
|
: false_type
|
|
{ };
|
|
// If TUPLE is convertible to the single element in *this,
|
|
// then TUPLE should match tuple(UTypes&&...) instead.
|
|
template<typename _Tuple, typename _Tp, typename _Up>
|
|
struct _UseOtherCtor<_Tuple, tuple<_Tp>, tuple<_Up>>
|
|
: __or_<is_convertible<_Tuple, _Tp>, is_constructible<_Tp, _Tuple>>
|
|
{ };
|
|
// If TUPLE and *this each have a single element of the same type,
|
|
// then TUPLE should match a copy/move constructor instead.
|
|
template<typename _Tuple, typename _Tp>
|
|
struct _UseOtherCtor<_Tuple, tuple<_Tp>, tuple<_Tp>>
|
|
: true_type
|
|
{ };
|
|
|
|
// Return true iff sizeof...(Types) == 1 && tuple_size_v<TUPLE> == 1
|
|
// and the single element in Types can be initialized from TUPLE,
|
|
// or is the same type as tuple_element_t<0, TUPLE>.
|
|
template<typename _Tuple>
|
|
static constexpr bool __use_other_ctor()
|
|
{ return _UseOtherCtor<_Tuple>::value; }
|
|
|
|
public:
|
|
template<typename _Dummy = void,
|
|
_ImplicitDefaultCtor<is_void<_Dummy>::value> = true>
|
|
constexpr
|
|
tuple()
|
|
noexcept(__and_<is_nothrow_default_constructible<_Elements>...>::value)
|
|
: _Inherited() { }
|
|
|
|
template<typename _Dummy = void,
|
|
_ExplicitDefaultCtor<is_void<_Dummy>::value> = false>
|
|
explicit constexpr
|
|
tuple()
|
|
noexcept(__and_<is_nothrow_default_constructible<_Elements>...>::value)
|
|
: _Inherited() { }
|
|
|
|
template<bool _NotEmpty = (sizeof...(_Elements) >= 1),
|
|
_ImplicitCtor<_NotEmpty, const _Elements&...> = true>
|
|
constexpr
|
|
tuple(const _Elements&... __elements)
|
|
noexcept(__nothrow_constructible<const _Elements&...>())
|
|
: _Inherited(__elements...) { }
|
|
|
|
template<bool _NotEmpty = (sizeof...(_Elements) >= 1),
|
|
_ExplicitCtor<_NotEmpty, const _Elements&...> = false>
|
|
explicit constexpr
|
|
tuple(const _Elements&... __elements)
|
|
noexcept(__nothrow_constructible<const _Elements&...>())
|
|
: _Inherited(__elements...) { }
|
|
|
|
template<typename... _UElements,
|
|
bool _Valid = __valid_args<_UElements...>(),
|
|
_ImplicitCtor<_Valid, _UElements...> = true>
|
|
constexpr
|
|
tuple(_UElements&&... __elements)
|
|
noexcept(__nothrow_constructible<_UElements...>())
|
|
: _Inherited(std::forward<_UElements>(__elements)...) { }
|
|
|
|
template<typename... _UElements,
|
|
bool _Valid = __valid_args<_UElements...>(),
|
|
_ExplicitCtor<_Valid, _UElements...> = false>
|
|
explicit constexpr
|
|
tuple(_UElements&&... __elements)
|
|
noexcept(__nothrow_constructible<_UElements...>())
|
|
: _Inherited(std::forward<_UElements>(__elements)...) { }
|
|
|
|
constexpr tuple(const tuple&) = default;
|
|
|
|
constexpr tuple(tuple&&) = default;
|
|
|
|
template<typename... _UElements,
|
|
bool _Valid = (sizeof...(_Elements) == sizeof...(_UElements))
|
|
&& !__use_other_ctor<const tuple<_UElements...>&>(),
|
|
_ImplicitCtor<_Valid, const _UElements&...> = true>
|
|
constexpr
|
|
tuple(const tuple<_UElements...>& __in)
|
|
noexcept(__nothrow_constructible<const _UElements&...>())
|
|
: _Inherited(static_cast<const _Tuple_impl<0, _UElements...>&>(__in))
|
|
{ }
|
|
|
|
template<typename... _UElements,
|
|
bool _Valid = (sizeof...(_Elements) == sizeof...(_UElements))
|
|
&& !__use_other_ctor<const tuple<_UElements...>&>(),
|
|
_ExplicitCtor<_Valid, const _UElements&...> = false>
|
|
explicit constexpr
|
|
tuple(const tuple<_UElements...>& __in)
|
|
noexcept(__nothrow_constructible<const _UElements&...>())
|
|
: _Inherited(static_cast<const _Tuple_impl<0, _UElements...>&>(__in))
|
|
{ }
|
|
|
|
template<typename... _UElements,
|
|
bool _Valid = (sizeof...(_Elements) == sizeof...(_UElements))
|
|
&& !__use_other_ctor<tuple<_UElements...>&&>(),
|
|
_ImplicitCtor<_Valid, _UElements...> = true>
|
|
constexpr
|
|
tuple(tuple<_UElements...>&& __in)
|
|
noexcept(__nothrow_constructible<_UElements...>())
|
|
: _Inherited(static_cast<_Tuple_impl<0, _UElements...>&&>(__in)) { }
|
|
|
|
template<typename... _UElements,
|
|
bool _Valid = (sizeof...(_Elements) == sizeof...(_UElements))
|
|
&& !__use_other_ctor<tuple<_UElements...>&&>(),
|
|
_ExplicitCtor<_Valid, _UElements...> = false>
|
|
explicit constexpr
|
|
tuple(tuple<_UElements...>&& __in)
|
|
noexcept(__nothrow_constructible<_UElements...>())
|
|
: _Inherited(static_cast<_Tuple_impl<0, _UElements...>&&>(__in)) { }
|
|
|
|
// Allocator-extended constructors.
|
|
|
|
template<typename _Alloc,
|
|
_ImplicitDefaultCtor<is_object<_Alloc>::value> = true>
|
|
_GLIBCXX20_CONSTEXPR
|
|
tuple(allocator_arg_t __tag, const _Alloc& __a)
|
|
: _Inherited(__tag, __a) { }
|
|
|
|
template<typename _Alloc, bool _NotEmpty = (sizeof...(_Elements) >= 1),
|
|
_ImplicitCtor<_NotEmpty, const _Elements&...> = true>
|
|
_GLIBCXX20_CONSTEXPR
|
|
tuple(allocator_arg_t __tag, const _Alloc& __a,
|
|
const _Elements&... __elements)
|
|
: _Inherited(__tag, __a, __elements...) { }
|
|
|
|
template<typename _Alloc, bool _NotEmpty = (sizeof...(_Elements) >= 1),
|
|
_ExplicitCtor<_NotEmpty, const _Elements&...> = false>
|
|
_GLIBCXX20_CONSTEXPR
|
|
explicit
|
|
tuple(allocator_arg_t __tag, const _Alloc& __a,
|
|
const _Elements&... __elements)
|
|
: _Inherited(__tag, __a, __elements...) { }
|
|
|
|
template<typename _Alloc, typename... _UElements,
|
|
bool _Valid = __valid_args<_UElements...>(),
|
|
_ImplicitCtor<_Valid, _UElements...> = true>
|
|
_GLIBCXX20_CONSTEXPR
|
|
tuple(allocator_arg_t __tag, const _Alloc& __a,
|
|
_UElements&&... __elements)
|
|
: _Inherited(__tag, __a, std::forward<_UElements>(__elements)...)
|
|
{ }
|
|
|
|
template<typename _Alloc, typename... _UElements,
|
|
bool _Valid = __valid_args<_UElements...>(),
|
|
_ExplicitCtor<_Valid, _UElements...> = false>
|
|
_GLIBCXX20_CONSTEXPR
|
|
explicit
|
|
tuple(allocator_arg_t __tag, const _Alloc& __a,
|
|
_UElements&&... __elements)
|
|
: _Inherited(__tag, __a, std::forward<_UElements>(__elements)...)
|
|
{ }
|
|
|
|
template<typename _Alloc>
|
|
_GLIBCXX20_CONSTEXPR
|
|
tuple(allocator_arg_t __tag, const _Alloc& __a, const tuple& __in)
|
|
: _Inherited(__tag, __a, static_cast<const _Inherited&>(__in)) { }
|
|
|
|
template<typename _Alloc>
|
|
_GLIBCXX20_CONSTEXPR
|
|
tuple(allocator_arg_t __tag, const _Alloc& __a, tuple&& __in)
|
|
: _Inherited(__tag, __a, static_cast<_Inherited&&>(__in)) { }
|
|
|
|
template<typename _Alloc, typename... _UElements,
|
|
bool _Valid = (sizeof...(_Elements) == sizeof...(_UElements))
|
|
&& !__use_other_ctor<const tuple<_UElements...>&>(),
|
|
_ImplicitCtor<_Valid, const _UElements&...> = true>
|
|
_GLIBCXX20_CONSTEXPR
|
|
tuple(allocator_arg_t __tag, const _Alloc& __a,
|
|
const tuple<_UElements...>& __in)
|
|
: _Inherited(__tag, __a,
|
|
static_cast<const _Tuple_impl<0, _UElements...>&>(__in))
|
|
{ }
|
|
|
|
template<typename _Alloc, typename... _UElements,
|
|
bool _Valid = (sizeof...(_Elements) == sizeof...(_UElements))
|
|
&& !__use_other_ctor<const tuple<_UElements...>&>(),
|
|
_ExplicitCtor<_Valid, const _UElements&...> = false>
|
|
_GLIBCXX20_CONSTEXPR
|
|
explicit
|
|
tuple(allocator_arg_t __tag, const _Alloc& __a,
|
|
const tuple<_UElements...>& __in)
|
|
: _Inherited(__tag, __a,
|
|
static_cast<const _Tuple_impl<0, _UElements...>&>(__in))
|
|
{ }
|
|
|
|
template<typename _Alloc, typename... _UElements,
|
|
bool _Valid = (sizeof...(_Elements) == sizeof...(_UElements))
|
|
&& !__use_other_ctor<tuple<_UElements...>&&>(),
|
|
_ImplicitCtor<_Valid, _UElements...> = true>
|
|
_GLIBCXX20_CONSTEXPR
|
|
tuple(allocator_arg_t __tag, const _Alloc& __a,
|
|
tuple<_UElements...>&& __in)
|
|
: _Inherited(__tag, __a,
|
|
static_cast<_Tuple_impl<0, _UElements...>&&>(__in))
|
|
{ }
|
|
|
|
template<typename _Alloc, typename... _UElements,
|
|
bool _Valid = (sizeof...(_Elements) == sizeof...(_UElements))
|
|
&& !__use_other_ctor<tuple<_UElements...>&&>(),
|
|
_ExplicitCtor<_Valid, _UElements...> = false>
|
|
_GLIBCXX20_CONSTEXPR
|
|
explicit
|
|
tuple(allocator_arg_t __tag, const _Alloc& __a,
|
|
tuple<_UElements...>&& __in)
|
|
: _Inherited(__tag, __a,
|
|
static_cast<_Tuple_impl<0, _UElements...>&&>(__in))
|
|
{ }
|
|
|
|
// tuple assignment
|
|
|
|
_GLIBCXX20_CONSTEXPR
|
|
tuple&
|
|
operator=(__conditional_t<__assignable<const _Elements&...>(),
|
|
const tuple&,
|
|
const __nonesuch&> __in)
|
|
noexcept(__nothrow_assignable<const _Elements&...>())
|
|
{
|
|
this->_M_assign(__in);
|
|
return *this;
|
|
}
|
|
|
|
_GLIBCXX20_CONSTEXPR
|
|
tuple&
|
|
operator=(__conditional_t<__assignable<_Elements...>(),
|
|
tuple&&,
|
|
__nonesuch&&> __in)
|
|
noexcept(__nothrow_assignable<_Elements...>())
|
|
{
|
|
this->_M_assign(std::move(__in));
|
|
return *this;
|
|
}
|
|
|
|
template<typename... _UElements>
|
|
_GLIBCXX20_CONSTEXPR
|
|
__enable_if_t<__assignable<const _UElements&...>(), tuple&>
|
|
operator=(const tuple<_UElements...>& __in)
|
|
noexcept(__nothrow_assignable<const _UElements&...>())
|
|
{
|
|
this->_M_assign(__in);
|
|
return *this;
|
|
}
|
|
|
|
template<typename... _UElements>
|
|
_GLIBCXX20_CONSTEXPR
|
|
__enable_if_t<__assignable<_UElements...>(), tuple&>
|
|
operator=(tuple<_UElements...>&& __in)
|
|
noexcept(__nothrow_assignable<_UElements...>())
|
|
{
|
|
this->_M_assign(std::move(__in));
|
|
return *this;
|
|
}
|
|
|
|
// tuple swap
|
|
_GLIBCXX20_CONSTEXPR
|
|
void
|
|
swap(tuple& __in)
|
|
noexcept(__and_<__is_nothrow_swappable<_Elements>...>::value)
|
|
{ _Inherited::_M_swap(__in); }
|
|
};
|
|
|
|
#if __cpp_deduction_guides >= 201606
|
|
template<typename... _UTypes>
|
|
tuple(_UTypes...) -> tuple<_UTypes...>;
|
|
template<typename _T1, typename _T2>
|
|
tuple(pair<_T1, _T2>) -> tuple<_T1, _T2>;
|
|
template<typename _Alloc, typename... _UTypes>
|
|
tuple(allocator_arg_t, _Alloc, _UTypes...) -> tuple<_UTypes...>;
|
|
template<typename _Alloc, typename _T1, typename _T2>
|
|
tuple(allocator_arg_t, _Alloc, pair<_T1, _T2>) -> tuple<_T1, _T2>;
|
|
template<typename _Alloc, typename... _UTypes>
|
|
tuple(allocator_arg_t, _Alloc, tuple<_UTypes...>) -> tuple<_UTypes...>;
|
|
#endif
|
|
|
|
// Explicit specialization, zero-element tuple.
|
|
template<>
|
|
class tuple<>
|
|
{
|
|
public:
|
|
_GLIBCXX20_CONSTEXPR
|
|
void swap(tuple&) noexcept { /* no-op */ }
|
|
// We need the default since we're going to define no-op
|
|
// allocator constructors.
|
|
tuple() = default;
|
|
// No-op allocator constructors.
|
|
template<typename _Alloc>
|
|
_GLIBCXX20_CONSTEXPR
|
|
tuple(allocator_arg_t, const _Alloc&) noexcept { }
|
|
template<typename _Alloc>
|
|
_GLIBCXX20_CONSTEXPR
|
|
tuple(allocator_arg_t, const _Alloc&, const tuple&) noexcept { }
|
|
};
|
|
|
|
/// Partial specialization, 2-element tuple.
|
|
/// Includes 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;
|
|
|
|
// Constraint for non-explicit default constructor
|
|
template<bool _Dummy, typename _U1, typename _U2>
|
|
using _ImplicitDefaultCtor = __enable_if_t<
|
|
_TupleConstraints<_Dummy, _U1, _U2>::
|
|
__is_implicitly_default_constructible(),
|
|
bool>;
|
|
|
|
// Constraint for explicit default constructor
|
|
template<bool _Dummy, typename _U1, typename _U2>
|
|
using _ExplicitDefaultCtor = __enable_if_t<
|
|
_TupleConstraints<_Dummy, _U1, _U2>::
|
|
__is_explicitly_default_constructible(),
|
|
bool>;
|
|
|
|
template<bool _Dummy>
|
|
using _TCC = _TupleConstraints<_Dummy, _T1, _T2>;
|
|
|
|
// Constraint for non-explicit constructors
|
|
template<bool _Cond, typename _U1, typename _U2>
|
|
using _ImplicitCtor = __enable_if_t<
|
|
_TCC<_Cond>::template __is_implicitly_constructible<_U1, _U2>(),
|
|
bool>;
|
|
|
|
// Constraint for non-explicit constructors
|
|
template<bool _Cond, typename _U1, typename _U2>
|
|
using _ExplicitCtor = __enable_if_t<
|
|
_TCC<_Cond>::template __is_explicitly_constructible<_U1, _U2>(),
|
|
bool>;
|
|
|
|
template<typename _U1, typename _U2>
|
|
static constexpr bool __assignable()
|
|
{
|
|
return __and_<is_assignable<_T1&, _U1>,
|
|
is_assignable<_T2&, _U2>>::value;
|
|
}
|
|
|
|
template<typename _U1, typename _U2>
|
|
static constexpr bool __nothrow_assignable()
|
|
{
|
|
return __and_<is_nothrow_assignable<_T1&, _U1>,
|
|
is_nothrow_assignable<_T2&, _U2>>::value;
|
|
}
|
|
|
|
template<typename _U1, typename _U2>
|
|
static constexpr bool __nothrow_constructible()
|
|
{
|
|
return __and_<is_nothrow_constructible<_T1, _U1>,
|
|
is_nothrow_constructible<_T2, _U2>>::value;
|
|
}
|
|
|
|
static constexpr bool __nothrow_default_constructible()
|
|
{
|
|
return __and_<is_nothrow_default_constructible<_T1>,
|
|
is_nothrow_default_constructible<_T2>>::value;
|
|
}
|
|
|
|
template<typename _U1>
|
|
static constexpr bool __is_alloc_arg()
|
|
{ return is_same<__remove_cvref_t<_U1>, allocator_arg_t>::value; }
|
|
|
|
public:
|
|
template<bool _Dummy = true,
|
|
_ImplicitDefaultCtor<_Dummy, _T1, _T2> = true>
|
|
constexpr
|
|
tuple()
|
|
noexcept(__nothrow_default_constructible())
|
|
: _Inherited() { }
|
|
|
|
template<bool _Dummy = true,
|
|
_ExplicitDefaultCtor<_Dummy, _T1, _T2> = false>
|
|
explicit constexpr
|
|
tuple()
|
|
noexcept(__nothrow_default_constructible())
|
|
: _Inherited() { }
|
|
|
|
template<bool _Dummy = true,
|
|
_ImplicitCtor<_Dummy, const _T1&, const _T2&> = true>
|
|
constexpr
|
|
tuple(const _T1& __a1, const _T2& __a2)
|
|
noexcept(__nothrow_constructible<const _T1&, const _T2&>())
|
|
: _Inherited(__a1, __a2) { }
|
|
|
|
template<bool _Dummy = true,
|
|
_ExplicitCtor<_Dummy, const _T1&, const _T2&> = false>
|
|
explicit constexpr
|
|
tuple(const _T1& __a1, const _T2& __a2)
|
|
noexcept(__nothrow_constructible<const _T1&, const _T2&>())
|
|
: _Inherited(__a1, __a2) { }
|
|
|
|
template<typename _U1, typename _U2,
|
|
_ImplicitCtor<!__is_alloc_arg<_U1>(), _U1, _U2> = true>
|
|
constexpr
|
|
tuple(_U1&& __a1, _U2&& __a2)
|
|
noexcept(__nothrow_constructible<_U1, _U2>())
|
|
: _Inherited(std::forward<_U1>(__a1), std::forward<_U2>(__a2)) { }
|
|
|
|
template<typename _U1, typename _U2,
|
|
_ExplicitCtor<!__is_alloc_arg<_U1>(), _U1, _U2> = false>
|
|
explicit constexpr
|
|
tuple(_U1&& __a1, _U2&& __a2)
|
|
noexcept(__nothrow_constructible<_U1, _U2>())
|
|
: _Inherited(std::forward<_U1>(__a1), std::forward<_U2>(__a2)) { }
|
|
|
|
constexpr tuple(const tuple&) = default;
|
|
|
|
constexpr tuple(tuple&&) = default;
|
|
|
|
template<typename _U1, typename _U2,
|
|
_ImplicitCtor<true, const _U1&, const _U2&> = true>
|
|
constexpr
|
|
tuple(const tuple<_U1, _U2>& __in)
|
|
noexcept(__nothrow_constructible<const _U1&, const _U2&>())
|
|
: _Inherited(static_cast<const _Tuple_impl<0, _U1, _U2>&>(__in)) { }
|
|
|
|
template<typename _U1, typename _U2,
|
|
_ExplicitCtor<true, const _U1&, const _U2&> = false>
|
|
explicit constexpr
|
|
tuple(const tuple<_U1, _U2>& __in)
|
|
noexcept(__nothrow_constructible<const _U1&, const _U2&>())
|
|
: _Inherited(static_cast<const _Tuple_impl<0, _U1, _U2>&>(__in)) { }
|
|
|
|
template<typename _U1, typename _U2,
|
|
_ImplicitCtor<true, _U1, _U2> = true>
|
|
constexpr
|
|
tuple(tuple<_U1, _U2>&& __in)
|
|
noexcept(__nothrow_constructible<_U1, _U2>())
|
|
: _Inherited(static_cast<_Tuple_impl<0, _U1, _U2>&&>(__in)) { }
|
|
|
|
template<typename _U1, typename _U2,
|
|
_ExplicitCtor<true, _U1, _U2> = false>
|
|
explicit constexpr
|
|
tuple(tuple<_U1, _U2>&& __in)
|
|
noexcept(__nothrow_constructible<_U1, _U2>())
|
|
: _Inherited(static_cast<_Tuple_impl<0, _U1, _U2>&&>(__in)) { }
|
|
|
|
template<typename _U1, typename _U2,
|
|
_ImplicitCtor<true, const _U1&, const _U2&> = true>
|
|
constexpr
|
|
tuple(const pair<_U1, _U2>& __in)
|
|
noexcept(__nothrow_constructible<const _U1&, const _U2&>())
|
|
: _Inherited(__in.first, __in.second) { }
|
|
|
|
template<typename _U1, typename _U2,
|
|
_ExplicitCtor<true, const _U1&, const _U2&> = false>
|
|
explicit constexpr
|
|
tuple(const pair<_U1, _U2>& __in)
|
|
noexcept(__nothrow_constructible<const _U1&, const _U2&>())
|
|
: _Inherited(__in.first, __in.second) { }
|
|
|
|
template<typename _U1, typename _U2,
|
|
_ImplicitCtor<true, _U1, _U2> = true>
|
|
constexpr
|
|
tuple(pair<_U1, _U2>&& __in)
|
|
noexcept(__nothrow_constructible<_U1, _U2>())
|
|
: _Inherited(std::forward<_U1>(__in.first),
|
|
std::forward<_U2>(__in.second)) { }
|
|
|
|
template<typename _U1, typename _U2,
|
|
_ExplicitCtor<true, _U1, _U2> = false>
|
|
explicit constexpr
|
|
tuple(pair<_U1, _U2>&& __in)
|
|
noexcept(__nothrow_constructible<_U1, _U2>())
|
|
: _Inherited(std::forward<_U1>(__in.first),
|
|
std::forward<_U2>(__in.second)) { }
|
|
|
|
// Allocator-extended constructors.
|
|
|
|
template<typename _Alloc,
|
|
_ImplicitDefaultCtor<is_object<_Alloc>::value, _T1, _T2> = true>
|
|
_GLIBCXX20_CONSTEXPR
|
|
tuple(allocator_arg_t __tag, const _Alloc& __a)
|
|
: _Inherited(__tag, __a) { }
|
|
|
|
template<typename _Alloc, bool _Dummy = true,
|
|
_ImplicitCtor<_Dummy, const _T1&, const _T2&> = true>
|
|
_GLIBCXX20_CONSTEXPR
|
|
tuple(allocator_arg_t __tag, const _Alloc& __a,
|
|
const _T1& __a1, const _T2& __a2)
|
|
: _Inherited(__tag, __a, __a1, __a2) { }
|
|
|
|
template<typename _Alloc, bool _Dummy = true,
|
|
_ExplicitCtor<_Dummy, const _T1&, const _T2&> = false>
|
|
explicit
|
|
_GLIBCXX20_CONSTEXPR
|
|
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,
|
|
_ImplicitCtor<true, _U1, _U2> = true>
|
|
_GLIBCXX20_CONSTEXPR
|
|
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, typename _U1, typename _U2,
|
|
_ExplicitCtor<true, _U1, _U2> = false>
|
|
explicit
|
|
_GLIBCXX20_CONSTEXPR
|
|
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>
|
|
_GLIBCXX20_CONSTEXPR
|
|
tuple(allocator_arg_t __tag, const _Alloc& __a, const tuple& __in)
|
|
: _Inherited(__tag, __a, static_cast<const _Inherited&>(__in)) { }
|
|
|
|
template<typename _Alloc>
|
|
_GLIBCXX20_CONSTEXPR
|
|
tuple(allocator_arg_t __tag, const _Alloc& __a, tuple&& __in)
|
|
: _Inherited(__tag, __a, static_cast<_Inherited&&>(__in)) { }
|
|
|
|
template<typename _Alloc, typename _U1, typename _U2,
|
|
_ImplicitCtor<true, const _U1&, const _U2&> = true>
|
|
_GLIBCXX20_CONSTEXPR
|
|
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,
|
|
_ExplicitCtor<true, const _U1&, const _U2&> = false>
|
|
explicit
|
|
_GLIBCXX20_CONSTEXPR
|
|
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,
|
|
_ImplicitCtor<true, _U1, _U2> = true>
|
|
_GLIBCXX20_CONSTEXPR
|
|
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,
|
|
_ExplicitCtor<true, _U1, _U2> = false>
|
|
explicit
|
|
_GLIBCXX20_CONSTEXPR
|
|
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,
|
|
_ImplicitCtor<true, const _U1&, const _U2&> = true>
|
|
_GLIBCXX20_CONSTEXPR
|
|
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,
|
|
_ExplicitCtor<true, const _U1&, const _U2&> = false>
|
|
explicit
|
|
_GLIBCXX20_CONSTEXPR
|
|
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,
|
|
_ImplicitCtor<true, _U1, _U2> = true>
|
|
_GLIBCXX20_CONSTEXPR
|
|
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)) { }
|
|
|
|
template<typename _Alloc, typename _U1, typename _U2,
|
|
_ExplicitCtor<true, _U1, _U2> = false>
|
|
explicit
|
|
_GLIBCXX20_CONSTEXPR
|
|
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 assignment.
|
|
|
|
_GLIBCXX20_CONSTEXPR
|
|
tuple&
|
|
operator=(__conditional_t<__assignable<const _T1&, const _T2&>(),
|
|
const tuple&,
|
|
const __nonesuch&> __in)
|
|
noexcept(__nothrow_assignable<const _T1&, const _T2&>())
|
|
{
|
|
this->_M_assign(__in);
|
|
return *this;
|
|
}
|
|
|
|
_GLIBCXX20_CONSTEXPR
|
|
tuple&
|
|
operator=(__conditional_t<__assignable<_T1, _T2>(),
|
|
tuple&&,
|
|
__nonesuch&&> __in)
|
|
noexcept(__nothrow_assignable<_T1, _T2>())
|
|
{
|
|
this->_M_assign(std::move(__in));
|
|
return *this;
|
|
}
|
|
|
|
template<typename _U1, typename _U2>
|
|
_GLIBCXX20_CONSTEXPR
|
|
__enable_if_t<__assignable<const _U1&, const _U2&>(), tuple&>
|
|
operator=(const tuple<_U1, _U2>& __in)
|
|
noexcept(__nothrow_assignable<const _U1&, const _U2&>())
|
|
{
|
|
this->_M_assign(__in);
|
|
return *this;
|
|
}
|
|
|
|
template<typename _U1, typename _U2>
|
|
_GLIBCXX20_CONSTEXPR
|
|
__enable_if_t<__assignable<_U1, _U2>(), tuple&>
|
|
operator=(tuple<_U1, _U2>&& __in)
|
|
noexcept(__nothrow_assignable<_U1, _U2>())
|
|
{
|
|
this->_M_assign(std::move(__in));
|
|
return *this;
|
|
}
|
|
|
|
template<typename _U1, typename _U2>
|
|
_GLIBCXX20_CONSTEXPR
|
|
__enable_if_t<__assignable<const _U1&, const _U2&>(), tuple&>
|
|
operator=(const pair<_U1, _U2>& __in)
|
|
noexcept(__nothrow_assignable<const _U1&, const _U2&>())
|
|
{
|
|
this->_M_head(*this) = __in.first;
|
|
this->_M_tail(*this)._M_head(*this) = __in.second;
|
|
return *this;
|
|
}
|
|
|
|
template<typename _U1, typename _U2>
|
|
_GLIBCXX20_CONSTEXPR
|
|
__enable_if_t<__assignable<_U1, _U2>(), tuple&>
|
|
operator=(pair<_U1, _U2>&& __in)
|
|
noexcept(__nothrow_assignable<_U1, _U2>())
|
|
{
|
|
this->_M_head(*this) = std::forward<_U1>(__in.first);
|
|
this->_M_tail(*this)._M_head(*this) = std::forward<_U2>(__in.second);
|
|
return *this;
|
|
}
|
|
|
|
_GLIBCXX20_CONSTEXPR
|
|
void
|
|
swap(tuple& __in)
|
|
noexcept(__and_<__is_nothrow_swappable<_T1>,
|
|
__is_nothrow_swappable<_T2>>::value)
|
|
{ _Inherited::_M_swap(__in); }
|
|
};
|
|
|
|
|
|
/// class tuple_size
|
|
template<typename... _Elements>
|
|
struct tuple_size<tuple<_Elements...>>
|
|
: public integral_constant<size_t, sizeof...(_Elements)> { };
|
|
|
|
#if __cplusplus >= 201703L
|
|
template<typename... _Types>
|
|
inline constexpr size_t tuple_size_v<tuple<_Types...>>
|
|
= sizeof...(_Types);
|
|
|
|
template<typename... _Types>
|
|
inline constexpr size_t tuple_size_v<const tuple<_Types...>>
|
|
= sizeof...(_Types);
|
|
#endif
|
|
|
|
/// Trait to get the Ith element type from a tuple.
|
|
template<size_t __i, typename... _Types>
|
|
struct tuple_element<__i, tuple<_Types...>>
|
|
{
|
|
static_assert(__i < sizeof...(_Types), "tuple index must be in range");
|
|
|
|
using type = typename _Nth_type<__i, _Types...>::type;
|
|
};
|
|
|
|
template<size_t __i, typename _Head, typename... _Tail>
|
|
constexpr _Head&
|
|
__get_helper(_Tuple_impl<__i, _Head, _Tail...>& __t) noexcept
|
|
{ return _Tuple_impl<__i, _Head, _Tail...>::_M_head(__t); }
|
|
|
|
template<size_t __i, typename _Head, typename... _Tail>
|
|
constexpr const _Head&
|
|
__get_helper(const _Tuple_impl<__i, _Head, _Tail...>& __t) noexcept
|
|
{ return _Tuple_impl<__i, _Head, _Tail...>::_M_head(__t); }
|
|
|
|
// Deleted overload to improve diagnostics for invalid indices
|
|
template<size_t __i, typename... _Types>
|
|
__enable_if_t<(__i >= sizeof...(_Types))>
|
|
__get_helper(const tuple<_Types...>&) = delete;
|
|
|
|
/// Return a reference to the ith element of a tuple.
|
|
template<size_t __i, typename... _Elements>
|
|
constexpr __tuple_element_t<__i, tuple<_Elements...>>&
|
|
get(tuple<_Elements...>& __t) noexcept
|
|
{ return std::__get_helper<__i>(__t); }
|
|
|
|
/// Return a const reference to the ith element of a const tuple.
|
|
template<size_t __i, typename... _Elements>
|
|
constexpr const __tuple_element_t<__i, tuple<_Elements...>>&
|
|
get(const tuple<_Elements...>& __t) noexcept
|
|
{ return std::__get_helper<__i>(__t); }
|
|
|
|
/// Return an rvalue reference to the ith element of a tuple rvalue.
|
|
template<size_t __i, typename... _Elements>
|
|
constexpr __tuple_element_t<__i, tuple<_Elements...>>&&
|
|
get(tuple<_Elements...>&& __t) noexcept
|
|
{
|
|
typedef __tuple_element_t<__i, tuple<_Elements...>> __element_type;
|
|
return std::forward<__element_type>(std::__get_helper<__i>(__t));
|
|
}
|
|
|
|
/// Return a const rvalue reference to the ith element of a const tuple rvalue.
|
|
template<size_t __i, typename... _Elements>
|
|
constexpr const __tuple_element_t<__i, tuple<_Elements...>>&&
|
|
get(const tuple<_Elements...>&& __t) noexcept
|
|
{
|
|
typedef __tuple_element_t<__i, tuple<_Elements...>> __element_type;
|
|
return std::forward<const __element_type>(std::__get_helper<__i>(__t));
|
|
}
|
|
|
|
/// @cond undocumented
|
|
// Deleted overload chosen for invalid indices.
|
|
template<size_t __i, typename... _Elements>
|
|
constexpr __enable_if_t<(__i >= sizeof...(_Elements))>
|
|
get(const tuple<_Elements...>&) = delete;
|
|
/// @endcond
|
|
|
|
#if __cplusplus >= 201402L
|
|
|
|
#define __cpp_lib_tuples_by_type 201304L
|
|
|
|
/// Return a reference to the unique element of type _Tp of a tuple.
|
|
template <typename _Tp, typename... _Types>
|
|
constexpr _Tp&
|
|
get(tuple<_Types...>& __t) noexcept
|
|
{
|
|
constexpr size_t __idx = __find_uniq_type_in_pack<_Tp, _Types...>();
|
|
static_assert(__idx < sizeof...(_Types),
|
|
"the type T in std::get<T> must occur exactly once in the tuple");
|
|
return std::__get_helper<__idx>(__t);
|
|
}
|
|
|
|
/// Return a reference to the unique element of type _Tp of a tuple rvalue.
|
|
template <typename _Tp, typename... _Types>
|
|
constexpr _Tp&&
|
|
get(tuple<_Types...>&& __t) noexcept
|
|
{
|
|
constexpr size_t __idx = __find_uniq_type_in_pack<_Tp, _Types...>();
|
|
static_assert(__idx < sizeof...(_Types),
|
|
"the type T in std::get<T> must occur exactly once in the tuple");
|
|
return std::forward<_Tp>(std::__get_helper<__idx>(__t));
|
|
}
|
|
|
|
/// Return a const reference to the unique element of type _Tp of a tuple.
|
|
template <typename _Tp, typename... _Types>
|
|
constexpr const _Tp&
|
|
get(const tuple<_Types...>& __t) noexcept
|
|
{
|
|
constexpr size_t __idx = __find_uniq_type_in_pack<_Tp, _Types...>();
|
|
static_assert(__idx < sizeof...(_Types),
|
|
"the type T in std::get<T> must occur exactly once in the tuple");
|
|
return std::__get_helper<__idx>(__t);
|
|
}
|
|
|
|
/// Return a const reference to the unique element of type _Tp of
|
|
/// a const tuple rvalue.
|
|
template <typename _Tp, typename... _Types>
|
|
constexpr const _Tp&&
|
|
get(const tuple<_Types...>&& __t) noexcept
|
|
{
|
|
constexpr size_t __idx = __find_uniq_type_in_pack<_Tp, _Types...>();
|
|
static_assert(__idx < sizeof...(_Types),
|
|
"the type T in std::get<T> must occur exactly once in the tuple");
|
|
return std::forward<const _Tp>(std::__get_helper<__idx>(__t));
|
|
}
|
|
#endif
|
|
|
|
// This class performs the comparison operations on tuples
|
|
template<typename _Tp, typename _Up, size_t __i, size_t __size>
|
|
struct __tuple_compare
|
|
{
|
|
static constexpr bool
|
|
__eq(const _Tp& __t, const _Up& __u)
|
|
{
|
|
return bool(std::get<__i>(__t) == std::get<__i>(__u))
|
|
&& __tuple_compare<_Tp, _Up, __i + 1, __size>::__eq(__t, __u);
|
|
}
|
|
|
|
static constexpr bool
|
|
__less(const _Tp& __t, const _Up& __u)
|
|
{
|
|
return bool(std::get<__i>(__t) < std::get<__i>(__u))
|
|
|| (!bool(std::get<__i>(__u) < std::get<__i>(__t))
|
|
&& __tuple_compare<_Tp, _Up, __i + 1, __size>::__less(__t, __u));
|
|
}
|
|
};
|
|
|
|
template<typename _Tp, typename _Up, size_t __size>
|
|
struct __tuple_compare<_Tp, _Up, __size, __size>
|
|
{
|
|
static constexpr bool
|
|
__eq(const _Tp&, const _Up&) { return true; }
|
|
|
|
static constexpr bool
|
|
__less(const _Tp&, const _Up&) { return false; }
|
|
};
|
|
|
|
template<typename... _TElements, typename... _UElements>
|
|
constexpr bool
|
|
operator==(const tuple<_TElements...>& __t,
|
|
const tuple<_UElements...>& __u)
|
|
{
|
|
static_assert(sizeof...(_TElements) == sizeof...(_UElements),
|
|
"tuple objects can only be compared if they have equal sizes.");
|
|
using __compare = __tuple_compare<tuple<_TElements...>,
|
|
tuple<_UElements...>,
|
|
0, sizeof...(_TElements)>;
|
|
return __compare::__eq(__t, __u);
|
|
}
|
|
|
|
#if __cpp_lib_three_way_comparison
|
|
template<typename _Cat, typename _Tp, typename _Up>
|
|
constexpr _Cat
|
|
__tuple_cmp(const _Tp&, const _Up&, index_sequence<>)
|
|
{ return _Cat::equivalent; }
|
|
|
|
template<typename _Cat, typename _Tp, typename _Up,
|
|
size_t _Idx0, size_t... _Idxs>
|
|
constexpr _Cat
|
|
__tuple_cmp(const _Tp& __t, const _Up& __u,
|
|
index_sequence<_Idx0, _Idxs...>)
|
|
{
|
|
auto __c
|
|
= __detail::__synth3way(std::get<_Idx0>(__t), std::get<_Idx0>(__u));
|
|
if (__c != 0)
|
|
return __c;
|
|
return std::__tuple_cmp<_Cat>(__t, __u, index_sequence<_Idxs...>());
|
|
}
|
|
|
|
template<typename... _Tps, typename... _Ups>
|
|
constexpr
|
|
common_comparison_category_t<__detail::__synth3way_t<_Tps, _Ups>...>
|
|
operator<=>(const tuple<_Tps...>& __t, const tuple<_Ups...>& __u)
|
|
{
|
|
using _Cat
|
|
= common_comparison_category_t<__detail::__synth3way_t<_Tps, _Ups>...>;
|
|
return std::__tuple_cmp<_Cat>(__t, __u, index_sequence_for<_Tps...>());
|
|
}
|
|
#else
|
|
template<typename... _TElements, typename... _UElements>
|
|
constexpr bool
|
|
operator<(const tuple<_TElements...>& __t,
|
|
const tuple<_UElements...>& __u)
|
|
{
|
|
static_assert(sizeof...(_TElements) == sizeof...(_UElements),
|
|
"tuple objects can only be compared if they have equal sizes.");
|
|
using __compare = __tuple_compare<tuple<_TElements...>,
|
|
tuple<_UElements...>,
|
|
0, sizeof...(_TElements)>;
|
|
return __compare::__less(__t, __u);
|
|
}
|
|
|
|
template<typename... _TElements, typename... _UElements>
|
|
constexpr bool
|
|
operator!=(const tuple<_TElements...>& __t,
|
|
const tuple<_UElements...>& __u)
|
|
{ return !(__t == __u); }
|
|
|
|
template<typename... _TElements, typename... _UElements>
|
|
constexpr bool
|
|
operator>(const tuple<_TElements...>& __t,
|
|
const tuple<_UElements...>& __u)
|
|
{ return __u < __t; }
|
|
|
|
template<typename... _TElements, typename... _UElements>
|
|
constexpr bool
|
|
operator<=(const tuple<_TElements...>& __t,
|
|
const tuple<_UElements...>& __u)
|
|
{ return !(__u < __t); }
|
|
|
|
template<typename... _TElements, typename... _UElements>
|
|
constexpr bool
|
|
operator>=(const tuple<_TElements...>& __t,
|
|
const tuple<_UElements...>& __u)
|
|
{ return !(__t < __u); }
|
|
#endif // three_way_comparison
|
|
|
|
// NB: DR 705.
|
|
template<typename... _Elements>
|
|
constexpr 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)...);
|
|
}
|
|
|
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS
|
|
// 2275. Why is forward_as_tuple not constexpr?
|
|
/// std::forward_as_tuple
|
|
template<typename... _Elements>
|
|
constexpr tuple<_Elements&&...>
|
|
forward_as_tuple(_Elements&&... __args) noexcept
|
|
{ return tuple<_Elements&&...>(std::forward<_Elements>(__args)...); }
|
|
|
|
// Declarations of std::array and its std::get overloads, so that
|
|
// std::tuple_cat can use them if <tuple> is included before <array>.
|
|
|
|
template<typename _Tp, size_t _Nm> struct array;
|
|
|
|
template<size_t _Int, typename _Tp, size_t _Nm>
|
|
constexpr _Tp&
|
|
get(array<_Tp, _Nm>&) noexcept;
|
|
|
|
template<size_t _Int, typename _Tp, size_t _Nm>
|
|
constexpr _Tp&&
|
|
get(array<_Tp, _Nm>&&) noexcept;
|
|
|
|
template<size_t _Int, typename _Tp, size_t _Nm>
|
|
constexpr const _Tp&
|
|
get(const array<_Tp, _Nm>&) noexcept;
|
|
|
|
template<size_t _Int, typename _Tp, size_t _Nm>
|
|
constexpr const _Tp&&
|
|
get(const array<_Tp, _Nm>&&) noexcept;
|
|
|
|
|
|
template<size_t, typename, typename, size_t>
|
|
struct __make_tuple_impl;
|
|
|
|
template<size_t _Idx, typename _Tuple, typename... _Tp, size_t _Nm>
|
|
struct __make_tuple_impl<_Idx, tuple<_Tp...>, _Tuple, _Nm>
|
|
: __make_tuple_impl<_Idx + 1,
|
|
tuple<_Tp..., __tuple_element_t<_Idx, _Tuple>>,
|
|
_Tuple, _Nm>
|
|
{ };
|
|
|
|
template<size_t _Nm, typename _Tuple, typename... _Tp>
|
|
struct __make_tuple_impl<_Nm, tuple<_Tp...>, _Tuple, _Nm>
|
|
{
|
|
typedef tuple<_Tp...> __type;
|
|
};
|
|
|
|
template<typename _Tuple>
|
|
struct __do_make_tuple
|
|
: __make_tuple_impl<0, tuple<>, _Tuple, tuple_size<_Tuple>::value>
|
|
{ };
|
|
|
|
// Returns the std::tuple equivalent of a tuple-like type.
|
|
template<typename _Tuple>
|
|
struct __make_tuple
|
|
: public __do_make_tuple<__remove_cvref_t<_Tuple>>
|
|
{ };
|
|
|
|
// Combines several std::tuple's into a single one.
|
|
template<typename...>
|
|
struct __combine_tuples;
|
|
|
|
template<>
|
|
struct __combine_tuples<>
|
|
{
|
|
typedef tuple<> __type;
|
|
};
|
|
|
|
template<typename... _Ts>
|
|
struct __combine_tuples<tuple<_Ts...>>
|
|
{
|
|
typedef tuple<_Ts...> __type;
|
|
};
|
|
|
|
template<typename... _T1s, typename... _T2s, typename... _Rem>
|
|
struct __combine_tuples<tuple<_T1s...>, tuple<_T2s...>, _Rem...>
|
|
{
|
|
typedef typename __combine_tuples<tuple<_T1s..., _T2s...>,
|
|
_Rem...>::__type __type;
|
|
};
|
|
|
|
// Computes the result type of tuple_cat given a set of tuple-like types.
|
|
template<typename... _Tpls>
|
|
struct __tuple_cat_result
|
|
{
|
|
typedef typename __combine_tuples
|
|
<typename __make_tuple<_Tpls>::__type...>::__type __type;
|
|
};
|
|
|
|
// Helper to determine the index set for the first tuple-like
|
|
// type of a given set.
|
|
template<typename...>
|
|
struct __make_1st_indices;
|
|
|
|
template<>
|
|
struct __make_1st_indices<>
|
|
{
|
|
typedef _Index_tuple<> __type;
|
|
};
|
|
|
|
template<typename _Tp, typename... _Tpls>
|
|
struct __make_1st_indices<_Tp, _Tpls...>
|
|
{
|
|
typedef typename _Build_index_tuple<tuple_size<
|
|
typename remove_reference<_Tp>::type>::value>::__type __type;
|
|
};
|
|
|
|
// Performs the actual concatenation by step-wise expanding tuple-like
|
|
// objects into the elements, which are finally forwarded into the
|
|
// result tuple.
|
|
template<typename _Ret, typename _Indices, typename... _Tpls>
|
|
struct __tuple_concater;
|
|
|
|
template<typename _Ret, size_t... _Is, typename _Tp, typename... _Tpls>
|
|
struct __tuple_concater<_Ret, _Index_tuple<_Is...>, _Tp, _Tpls...>
|
|
{
|
|
template<typename... _Us>
|
|
static constexpr _Ret
|
|
_S_do(_Tp&& __tp, _Tpls&&... __tps, _Us&&... __us)
|
|
{
|
|
typedef typename __make_1st_indices<_Tpls...>::__type __idx;
|
|
typedef __tuple_concater<_Ret, __idx, _Tpls...> __next;
|
|
return __next::_S_do(std::forward<_Tpls>(__tps)...,
|
|
std::forward<_Us>(__us)...,
|
|
std::get<_Is>(std::forward<_Tp>(__tp))...);
|
|
}
|
|
};
|
|
|
|
template<typename _Ret>
|
|
struct __tuple_concater<_Ret, _Index_tuple<>>
|
|
{
|
|
template<typename... _Us>
|
|
static constexpr _Ret
|
|
_S_do(_Us&&... __us)
|
|
{
|
|
return _Ret(std::forward<_Us>(__us)...);
|
|
}
|
|
};
|
|
|
|
template<typename... _Tps>
|
|
struct __is_tuple_like_impl<tuple<_Tps...>> : true_type
|
|
{ };
|
|
|
|
/// tuple_cat
|
|
template<typename... _Tpls, typename = typename
|
|
enable_if<__and_<__is_tuple_like<_Tpls>...>::value>::type>
|
|
constexpr auto
|
|
tuple_cat(_Tpls&&... __tpls)
|
|
-> typename __tuple_cat_result<_Tpls...>::__type
|
|
{
|
|
typedef typename __tuple_cat_result<_Tpls...>::__type __ret;
|
|
typedef typename __make_1st_indices<_Tpls...>::__type __idx;
|
|
typedef __tuple_concater<__ret, __idx, _Tpls...> __concater;
|
|
return __concater::_S_do(std::forward<_Tpls>(__tpls)...);
|
|
}
|
|
|
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS
|
|
// 2301. Why is tie not constexpr?
|
|
/// tie
|
|
template<typename... _Elements>
|
|
constexpr tuple<_Elements&...>
|
|
tie(_Elements&... __args) noexcept
|
|
{ return tuple<_Elements&...>(__args...); }
|
|
|
|
/// swap
|
|
template<typename... _Elements>
|
|
_GLIBCXX20_CONSTEXPR
|
|
inline
|
|
#if __cplusplus > 201402L || !defined(__STRICT_ANSI__) // c++1z or gnu++11
|
|
// Constrained free swap overload, see p0185r1
|
|
typename enable_if<__and_<__is_swappable<_Elements>...>::value
|
|
>::type
|
|
#else
|
|
void
|
|
#endif
|
|
swap(tuple<_Elements...>& __x, tuple<_Elements...>& __y)
|
|
noexcept(noexcept(__x.swap(__y)))
|
|
{ __x.swap(__y); }
|
|
|
|
#if __cplusplus > 201402L || !defined(__STRICT_ANSI__) // c++1z or gnu++11
|
|
template<typename... _Elements>
|
|
_GLIBCXX20_CONSTEXPR
|
|
typename enable_if<!__and_<__is_swappable<_Elements>...>::value>::type
|
|
swap(tuple<_Elements...>&, tuple<_Elements...>&) = delete;
|
|
#endif
|
|
|
|
// A class (and instance) which can be used in 'tie' when an element
|
|
// of a tuple is not required.
|
|
// _GLIBCXX14_CONSTEXPR
|
|
// 2933. PR for LWG 2773 could be clearer
|
|
struct _Swallow_assign
|
|
{
|
|
template<class _Tp>
|
|
_GLIBCXX14_CONSTEXPR const _Swallow_assign&
|
|
operator=(const _Tp&) const
|
|
{ return *this; }
|
|
};
|
|
|
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS
|
|
// 2773. Making std::ignore constexpr
|
|
_GLIBCXX17_INLINE constexpr _Swallow_assign ignore{};
|
|
|
|
/// Partial specialization for tuples
|
|
template<typename... _Types, typename _Alloc>
|
|
struct uses_allocator<tuple<_Types...>, _Alloc> : true_type { };
|
|
|
|
// See stl_pair.h...
|
|
/** "piecewise construction" using a tuple of arguments for each member.
|
|
*
|
|
* @param __first Arguments for the first member of the pair.
|
|
* @param __second Arguments for the second member of the pair.
|
|
*
|
|
* The elements of each tuple will be used as the constructor arguments
|
|
* for the data members of the pair.
|
|
*/
|
|
template<class _T1, class _T2>
|
|
template<typename... _Args1, typename... _Args2>
|
|
_GLIBCXX20_CONSTEXPR
|
|
inline
|
|
pair<_T1, _T2>::
|
|
pair(piecewise_construct_t,
|
|
tuple<_Args1...> __first, tuple<_Args2...> __second)
|
|
: pair(__first, __second,
|
|
typename _Build_index_tuple<sizeof...(_Args1)>::__type(),
|
|
typename _Build_index_tuple<sizeof...(_Args2)>::__type())
|
|
{ }
|
|
|
|
template<class _T1, class _T2>
|
|
template<typename... _Args1, size_t... _Indexes1,
|
|
typename... _Args2, size_t... _Indexes2>
|
|
_GLIBCXX20_CONSTEXPR inline
|
|
pair<_T1, _T2>::
|
|
pair(tuple<_Args1...>& __tuple1, tuple<_Args2...>& __tuple2,
|
|
_Index_tuple<_Indexes1...>, _Index_tuple<_Indexes2...>)
|
|
: first(std::forward<_Args1>(std::get<_Indexes1>(__tuple1))...),
|
|
second(std::forward<_Args2>(std::get<_Indexes2>(__tuple2))...)
|
|
{ }
|
|
|
|
#if __cplusplus >= 201703L
|
|
|
|
// Unpack a std::tuple into a type trait and use its value.
|
|
// For cv std::tuple<_Up> the result is _Trait<_Tp, cv _Up...>::value.
|
|
// For cv std::tuple<_Up>& the result is _Trait<_Tp, cv _Up&...>::value.
|
|
// Otherwise the result is false (because we don't know if std::get throws).
|
|
template<template<typename...> class _Trait, typename _Tp, typename _Tuple>
|
|
inline constexpr bool __unpack_std_tuple = false;
|
|
|
|
template<template<typename...> class _Trait, typename _Tp, typename... _Up>
|
|
inline constexpr bool __unpack_std_tuple<_Trait, _Tp, tuple<_Up...>>
|
|
= _Trait<_Tp, _Up...>::value;
|
|
|
|
template<template<typename...> class _Trait, typename _Tp, typename... _Up>
|
|
inline constexpr bool __unpack_std_tuple<_Trait, _Tp, tuple<_Up...>&>
|
|
= _Trait<_Tp, _Up&...>::value;
|
|
|
|
template<template<typename...> class _Trait, typename _Tp, typename... _Up>
|
|
inline constexpr bool __unpack_std_tuple<_Trait, _Tp, const tuple<_Up...>>
|
|
= _Trait<_Tp, const _Up...>::value;
|
|
|
|
template<template<typename...> class _Trait, typename _Tp, typename... _Up>
|
|
inline constexpr bool __unpack_std_tuple<_Trait, _Tp, const tuple<_Up...>&>
|
|
= _Trait<_Tp, const _Up&...>::value;
|
|
|
|
# define __cpp_lib_apply 201603L
|
|
|
|
template <typename _Fn, typename _Tuple, size_t... _Idx>
|
|
constexpr decltype(auto)
|
|
__apply_impl(_Fn&& __f, _Tuple&& __t, index_sequence<_Idx...>)
|
|
{
|
|
return std::__invoke(std::forward<_Fn>(__f),
|
|
std::get<_Idx>(std::forward<_Tuple>(__t))...);
|
|
}
|
|
|
|
template <typename _Fn, typename _Tuple>
|
|
constexpr decltype(auto)
|
|
apply(_Fn&& __f, _Tuple&& __t)
|
|
noexcept(__unpack_std_tuple<is_nothrow_invocable, _Fn, _Tuple>)
|
|
{
|
|
using _Indices
|
|
= make_index_sequence<tuple_size_v<remove_reference_t<_Tuple>>>;
|
|
return std::__apply_impl(std::forward<_Fn>(__f),
|
|
std::forward<_Tuple>(__t),
|
|
_Indices{});
|
|
}
|
|
|
|
#define __cpp_lib_make_from_tuple 201606L
|
|
|
|
template <typename _Tp, typename _Tuple, size_t... _Idx>
|
|
constexpr _Tp
|
|
__make_from_tuple_impl(_Tuple&& __t, index_sequence<_Idx...>)
|
|
{ return _Tp(std::get<_Idx>(std::forward<_Tuple>(__t))...); }
|
|
|
|
template <typename _Tp, typename _Tuple>
|
|
constexpr _Tp
|
|
make_from_tuple(_Tuple&& __t)
|
|
noexcept(__unpack_std_tuple<is_nothrow_constructible, _Tp, _Tuple>)
|
|
{
|
|
return __make_from_tuple_impl<_Tp>(
|
|
std::forward<_Tuple>(__t),
|
|
make_index_sequence<tuple_size_v<remove_reference_t<_Tuple>>>{});
|
|
}
|
|
#endif // C++17
|
|
|
|
/// @}
|
|
|
|
_GLIBCXX_END_NAMESPACE_VERSION
|
|
} // namespace std
|
|
|
|
#endif // C++11
|
|
|
|
#endif // _GLIBCXX_TUPLE
|