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Upgrade to 2022-era LLVM LIBCXX
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Justine Tunney
parent
2f4ca71f26
commit
8e68384e15
2078 changed files with 165657 additions and 65010 deletions
286
third_party/libcxx/__iterator/wrap_iter.h
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286
third_party/libcxx/__iterator/wrap_iter.h
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// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___ITERATOR_WRAP_ITER_H
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#define _LIBCPP___ITERATOR_WRAP_ITER_H
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#include <__config>
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#include <__debug>
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#include <__iterator/iterator_traits.h>
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#include <__memory/addressof.h>
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#include <__memory/pointer_traits.h>
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#include <__type_traits/enable_if.h>
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#include <__type_traits/is_convertible.h>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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_LIBCPP_BEGIN_NAMESPACE_STD
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template <class _Iter>
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class __wrap_iter
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{
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public:
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typedef _Iter iterator_type;
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typedef typename iterator_traits<iterator_type>::value_type value_type;
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typedef typename iterator_traits<iterator_type>::difference_type difference_type;
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typedef typename iterator_traits<iterator_type>::pointer pointer;
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typedef typename iterator_traits<iterator_type>::reference reference;
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typedef typename iterator_traits<iterator_type>::iterator_category iterator_category;
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#if _LIBCPP_STD_VER >= 20
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typedef contiguous_iterator_tag iterator_concept;
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#endif
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private:
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iterator_type __i_;
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public:
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 __wrap_iter() _NOEXCEPT
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: __i_()
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{
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_VSTD::__debug_db_insert_i(this);
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}
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template <class _Up> _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14
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__wrap_iter(const __wrap_iter<_Up>& __u,
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typename enable_if<is_convertible<_Up, iterator_type>::value>::type* = nullptr) _NOEXCEPT
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: __i_(__u.base())
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{
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#ifdef _LIBCPP_ENABLE_DEBUG_MODE
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if (!__libcpp_is_constant_evaluated())
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__get_db()->__iterator_copy(this, _VSTD::addressof(__u));
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#endif
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}
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#ifdef _LIBCPP_ENABLE_DEBUG_MODE
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14
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__wrap_iter(const __wrap_iter& __x)
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: __i_(__x.base())
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{
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if (!__libcpp_is_constant_evaluated())
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__get_db()->__iterator_copy(this, _VSTD::addressof(__x));
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}
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14
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__wrap_iter& operator=(const __wrap_iter& __x)
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{
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if (this != _VSTD::addressof(__x))
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{
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if (!__libcpp_is_constant_evaluated())
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__get_db()->__iterator_copy(this, _VSTD::addressof(__x));
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__i_ = __x.__i_;
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}
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return *this;
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}
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
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~__wrap_iter()
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{
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if (!__libcpp_is_constant_evaluated())
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__get_db()->__erase_i(this);
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}
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#endif
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 reference operator*() const _NOEXCEPT
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{
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_LIBCPP_DEBUG_ASSERT(__get_const_db()->__dereferenceable(this),
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"Attempted to dereference a non-dereferenceable iterator");
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return *__i_;
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}
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 pointer operator->() const _NOEXCEPT
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{
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_LIBCPP_DEBUG_ASSERT(__get_const_db()->__dereferenceable(this),
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"Attempted to dereference a non-dereferenceable iterator");
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return _VSTD::__to_address(__i_);
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}
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 __wrap_iter& operator++() _NOEXCEPT
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{
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_LIBCPP_DEBUG_ASSERT(__get_const_db()->__dereferenceable(this),
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"Attempted to increment a non-incrementable iterator");
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++__i_;
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return *this;
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}
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 __wrap_iter operator++(int) _NOEXCEPT
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{__wrap_iter __tmp(*this); ++(*this); return __tmp;}
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 __wrap_iter& operator--() _NOEXCEPT
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{
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_LIBCPP_DEBUG_ASSERT(__get_const_db()->__decrementable(this),
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"Attempted to decrement a non-decrementable iterator");
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--__i_;
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return *this;
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}
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 __wrap_iter operator--(int) _NOEXCEPT
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{__wrap_iter __tmp(*this); --(*this); return __tmp;}
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 __wrap_iter operator+ (difference_type __n) const _NOEXCEPT
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{__wrap_iter __w(*this); __w += __n; return __w;}
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 __wrap_iter& operator+=(difference_type __n) _NOEXCEPT
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{
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_LIBCPP_DEBUG_ASSERT(__get_const_db()->__addable(this, __n),
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"Attempted to add/subtract an iterator outside its valid range");
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__i_ += __n;
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return *this;
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}
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 __wrap_iter operator- (difference_type __n) const _NOEXCEPT
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{return *this + (-__n);}
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 __wrap_iter& operator-=(difference_type __n) _NOEXCEPT
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{*this += -__n; return *this;}
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 reference operator[](difference_type __n) const _NOEXCEPT
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{
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_LIBCPP_DEBUG_ASSERT(__get_const_db()->__subscriptable(this, __n),
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"Attempted to subscript an iterator outside its valid range");
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return __i_[__n];
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}
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 iterator_type base() const _NOEXCEPT {return __i_;}
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private:
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14
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explicit __wrap_iter(const void* __p, iterator_type __x) _NOEXCEPT : __i_(__x)
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{
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(void)__p;
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#ifdef _LIBCPP_ENABLE_DEBUG_MODE
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if (!__libcpp_is_constant_evaluated())
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__get_db()->__insert_ic(this, __p);
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#endif
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}
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template <class _Up> friend class __wrap_iter;
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template <class _CharT, class _Traits, class _Alloc> friend class basic_string;
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template <class _Tp, class _Alloc> friend class _LIBCPP_TEMPLATE_VIS vector;
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template <class _Tp, size_t> friend class _LIBCPP_TEMPLATE_VIS span;
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};
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template <class _Iter1>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR
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bool operator==(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT
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{
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return __x.base() == __y.base();
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}
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template <class _Iter1, class _Iter2>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR
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bool operator==(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT
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{
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return __x.base() == __y.base();
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}
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template <class _Iter1>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14
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bool operator<(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT
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{
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_LIBCPP_DEBUG_ASSERT(__get_const_db()->__less_than_comparable(_VSTD::addressof(__x), _VSTD::addressof(__y)),
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"Attempted to compare incomparable iterators");
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return __x.base() < __y.base();
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}
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template <class _Iter1, class _Iter2>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14
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bool operator<(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT
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{
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_LIBCPP_DEBUG_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y),
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"Attempted to compare incomparable iterators");
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return __x.base() < __y.base();
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}
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template <class _Iter1>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR
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bool operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT
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{
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return !(__x == __y);
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}
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template <class _Iter1, class _Iter2>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR
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bool operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT
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{
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return !(__x == __y);
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}
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template <class _Iter1>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR
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bool operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT
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{
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return __y < __x;
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}
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template <class _Iter1, class _Iter2>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR
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bool operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT
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{
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return __y < __x;
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}
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template <class _Iter1>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR
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bool operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT
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{
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return !(__x < __y);
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}
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template <class _Iter1, class _Iter2>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR
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bool operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT
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{
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return !(__x < __y);
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}
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template <class _Iter1>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR
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bool operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT
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{
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return !(__y < __x);
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}
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template <class _Iter1, class _Iter2>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR
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bool operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT
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{
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return !(__y < __x);
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}
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template <class _Iter1, class _Iter2>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14
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#ifndef _LIBCPP_CXX03_LANG
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auto operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT
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-> decltype(__x.base() - __y.base())
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#else
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typename __wrap_iter<_Iter1>::difference_type
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operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT
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#endif // C++03
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{
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_LIBCPP_DEBUG_ASSERT(__get_const_db()->__less_than_comparable(_VSTD::addressof(__x), _VSTD::addressof(__y)),
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"Attempted to subtract incompatible iterators");
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return __x.base() - __y.base();
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}
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template <class _Iter1>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14
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__wrap_iter<_Iter1> operator+(typename __wrap_iter<_Iter1>::difference_type __n, __wrap_iter<_Iter1> __x) _NOEXCEPT
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{
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__x += __n;
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return __x;
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}
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#if _LIBCPP_STD_VER <= 17
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template <class _It>
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struct __libcpp_is_contiguous_iterator<__wrap_iter<_It> > : true_type {};
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#endif
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template <class _It>
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struct _LIBCPP_TEMPLATE_VIS pointer_traits<__wrap_iter<_It> >
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{
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typedef __wrap_iter<_It> pointer;
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typedef typename pointer_traits<_It>::element_type element_type;
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typedef typename pointer_traits<_It>::difference_type difference_type;
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR
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static element_type *to_address(pointer __w) _NOEXCEPT {
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return _VSTD::__to_address(__w.base());
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}
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};
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___ITERATOR_WRAP_ITER_H
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