feae3bc202
Resolves #186801 Removed the non-standard member type `iterator_type` from `__wrap_iter`. This member exposed the underlying iterator type, and its removal prevents users from relying on the implementation detail.
244 lines
8.1 KiB
C++
244 lines
8.1 KiB
C++
// -*- 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 <__compare/ordering.h>
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#include <__compare/three_way_comparable.h>
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#include <__config>
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#include <__cstddef/size_t.h>
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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/conjunction.h>
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#include <__type_traits/disjunction.h>
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#include <__type_traits/enable_if.h>
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#include <__type_traits/integral_constant.h>
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#include <__type_traits/is_convertible.h>
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#include <__type_traits/is_same.h>
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#include <__type_traits/make_const_lvalue_ref.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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public:
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typedef typename iterator_traits<_Iter>::value_type value_type;
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typedef typename iterator_traits<_Iter>::difference_type difference_type;
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typedef typename iterator_traits<_Iter>::pointer pointer;
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typedef typename iterator_traits<_Iter>::reference reference;
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typedef typename iterator_traits<_Iter>::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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_Iter __i_;
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friend struct pointer_traits<__wrap_iter<_Iter> >;
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public:
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 __wrap_iter() _NOEXCEPT : __i_() {}
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template <class _OtherIter,
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__enable_if_t<
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_And<is_convertible<const _OtherIter&, _Iter>,
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_Or<is_same<reference, __iterator_reference<_OtherIter> >,
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is_same<reference, __make_const_lvalue_ref<__iterator_reference<_OtherIter> > > > >::value,
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int> = 0>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 __wrap_iter(const __wrap_iter<_OtherIter>& __u) _NOEXCEPT
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: __i_(__u.__i_) {}
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 reference operator*() const _NOEXCEPT { return *__i_; }
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 pointer operator->() const _NOEXCEPT {
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return std::__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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++__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);
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++(*this);
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return __tmp;
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}
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 __wrap_iter& operator--() _NOEXCEPT {
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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);
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--(*this);
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return __tmp;
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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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__wrap_iter __w(*this);
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__w += __n;
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return __w;
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}
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 __wrap_iter& operator+=(difference_type __n) _NOEXCEPT {
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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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}
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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;
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return *this;
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}
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 reference operator[](difference_type __n) const _NOEXCEPT {
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return __i_[__n];
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}
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private:
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 explicit __wrap_iter(_Iter __x) _NOEXCEPT : __i_(__x) {}
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template <class _Up>
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friend class __wrap_iter;
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template <class _CharT, class _Traits, class _Alloc>
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friend class basic_string;
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template <class _CharT, class _Traits>
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friend class basic_string_view;
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template <class _Tp, class _Alloc>
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friend class vector;
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template <class _Tp, size_t>
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friend class span;
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template <class _Tp, size_t _Size>
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friend struct array;
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_LIBCPP_HIDE_FROM_ABI friend _LIBCPP_CONSTEXPR bool
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operator==(const __wrap_iter& __x, const __wrap_iter& __y) _NOEXCEPT {
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return __x.__i_ == __y.__i_;
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}
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template <class _Iter2>
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_LIBCPP_HIDE_FROM_ABI friend _LIBCPP_CONSTEXPR bool
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operator==(const __wrap_iter& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT {
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return __x.__i_ == __y.__i_;
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}
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_LIBCPP_HIDE_FROM_ABI friend _LIBCPP_CONSTEXPR_SINCE_CXX14 bool
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operator<(const __wrap_iter& __x, const __wrap_iter& __y) _NOEXCEPT {
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return __x.__i_ < __y.__i_;
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}
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template <class _Iter2>
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_LIBCPP_HIDE_FROM_ABI friend _LIBCPP_CONSTEXPR_SINCE_CXX14 bool
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operator<(const __wrap_iter& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT {
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return __x.__i_ < __y.__i_;
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}
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#if _LIBCPP_STD_VER <= 17
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_LIBCPP_HIDE_FROM_ABI friend
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_LIBCPP_CONSTEXPR bool operator!=(const __wrap_iter& __x, const __wrap_iter& __y) _NOEXCEPT {
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return !(__x == __y);
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}
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template <class _Iter2>
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_LIBCPP_HIDE_FROM_ABI friend _LIBCPP_CONSTEXPR bool
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operator!=(const __wrap_iter& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT {
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return !(__x == __y);
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}
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_LIBCPP_HIDE_FROM_ABI friend _LIBCPP_CONSTEXPR bool
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operator>(const __wrap_iter& __x, const __wrap_iter& __y) _NOEXCEPT {
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return __y < __x;
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}
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template <class _Iter2>
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_LIBCPP_HIDE_FROM_ABI friend _LIBCPP_CONSTEXPR bool
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operator>(const __wrap_iter& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT {
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return __y < __x;
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}
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_LIBCPP_HIDE_FROM_ABI friend _LIBCPP_CONSTEXPR bool
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operator>=(const __wrap_iter& __x, const __wrap_iter& __y) _NOEXCEPT {
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return !(__x < __y);
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}
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template <class _Iter2>
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_LIBCPP_HIDE_FROM_ABI friend _LIBCPP_CONSTEXPR bool
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operator>=(const __wrap_iter& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT {
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return !(__x < __y);
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}
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_LIBCPP_HIDE_FROM_ABI friend _LIBCPP_CONSTEXPR bool
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operator<=(const __wrap_iter& __x, const __wrap_iter& __y) _NOEXCEPT {
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return !(__y < __x);
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}
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template <class _Iter2>
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_LIBCPP_HIDE_FROM_ABI friend _LIBCPP_CONSTEXPR bool
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operator<=(const __wrap_iter& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT {
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return !(__y < __x);
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}
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#else
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template <class _Iter2>
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_LIBCPP_HIDE_FROM_ABI friend constexpr strong_ordering
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operator<=>(const __wrap_iter& __x, const __wrap_iter<_Iter2>& __y) noexcept {
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if constexpr (three_way_comparable_with<_Iter, _Iter2, strong_ordering>) {
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return __x.__i_ <=> __y.__i_;
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} else {
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if (__x.__i_ < __y.__i_)
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return strong_ordering::less;
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if (__x.__i_ == __y.__i_)
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return strong_ordering::equal;
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return strong_ordering::greater;
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}
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}
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#endif // _LIBCPP_STD_VER >= 20
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#ifndef _LIBCPP_CXX03_LANG
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template <class _Iter2>
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_LIBCPP_HIDE_FROM_ABI friend _LIBCPP_CONSTEXPR_SINCE_CXX14 auto
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operator-(const __wrap_iter& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT->decltype(__x.__i_ - __y.__i_)
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#else
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template <class _Iter2>
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_LIBCPP_HIDE_FROM_ABI friend _LIBCPP_CONSTEXPR_SINCE_CXX14
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typename __wrap_iter::difference_type operator-(const __wrap_iter& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT
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#endif // C++03
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{
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return __x.__i_ - __y.__i_;
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}
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_LIBCPP_HIDE_FROM_ABI friend _LIBCPP_CONSTEXPR_SINCE_CXX14 __wrap_iter
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operator+(typename __wrap_iter::difference_type __n, __wrap_iter __x) _NOEXCEPT {
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__x += __n;
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return __x;
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}
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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 pointer_traits<__wrap_iter<_It> > {
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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 static element_type* to_address(pointer __w) _NOEXCEPT {
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return std::__to_address(__w.__i_);
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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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