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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// SPDX-FileCopyrightText: Copyright (c) 2023 NVIDIA CORPORATION & AFFILIATES.
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCUDACXX___ITERATOR_WRAP_ITER_H
#define _LIBCUDACXX___ITERATOR_WRAP_ITER_H
#ifndef __cuda_std__
#include <__config>
#endif // __cuda_std__
#include "../__debug"
#include "../__iterator/iterator_traits.h"
#include "../__memory/addressof.h"
#include "../__memory/pointer_traits.h"
#include "../__type_traits/enable_if.h"
#include "../__type_traits/is_convertible.h"
#include "../__type_traits/is_trivially_copy_assignable.h"
#if defined(_CCCL_IMPLICIT_SYSTEM_HEADER_GCC)
# pragma GCC system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_CLANG)
# pragma clang system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_MSVC)
# pragma system_header
#endif // no system header
_LIBCUDACXX_BEGIN_NAMESPACE_STD
// __wrap_iter
template <class _Iter> class __wrap_iter;
template <class _Iter1, class _Iter2>
_LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG
bool
operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) noexcept;
template <class _Iter1, class _Iter2>
_LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG
bool
operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) noexcept;
template <class _Iter1, class _Iter2>
_LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG
bool
operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) noexcept;
template <class _Iter1, class _Iter2>
_LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG
bool
operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) noexcept;
template <class _Iter1, class _Iter2>
_LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG
bool
operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) noexcept;
template <class _Iter1, class _Iter2>
_LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG
bool
operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) noexcept;
template <class _Iter1, class _Iter2>
_LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG
auto
operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) noexcept
-> decltype(__x.base() - __y.base());
template <class _Iter>
_LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG
__wrap_iter<_Iter>
operator+(typename __wrap_iter<_Iter>::difference_type, __wrap_iter<_Iter>) noexcept;
template <class _Ip, class _Op> _Op _LIBCUDACXX_INLINE_VISIBILITY copy(_Ip, _Ip, _Op);
template <class _B1, class _B2> _B2 _LIBCUDACXX_INLINE_VISIBILITY copy_backward(_B1, _B1, _B2);
template <class _Ip, class _Op> _Op _LIBCUDACXX_INLINE_VISIBILITY move(_Ip, _Ip, _Op);
template <class _B1, class _B2> _B2 _LIBCUDACXX_INLINE_VISIBILITY move_backward(_B1, _B1, _B2);
#if _LIBCUDACXX_DEBUG_LEVEL < 2
template <class _Tp>
_LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG
__enable_if_t
<
is_trivially_copy_assignable<_Tp>::value,
_Tp*
>
__unwrap_iter(__wrap_iter<_Tp*>);
#else
template <class _Tp>
inline _LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG
__enable_if_t
<
is_trivially_copy_assignable<_Tp>::value,
__wrap_iter<_Tp*>
>
__unwrap_iter(__wrap_iter<_Tp*> __i);
#endif
template <class _Iter>
class __wrap_iter
{
public:
typedef _Iter iterator_type;
typedef typename iterator_traits<iterator_type>::iterator_category iterator_category;
typedef typename iterator_traits<iterator_type>::value_type value_type;
typedef typename iterator_traits<iterator_type>::difference_type difference_type;
typedef typename iterator_traits<iterator_type>::pointer pointer;
typedef typename iterator_traits<iterator_type>::reference reference;
private:
iterator_type __i;
public:
_LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG __wrap_iter() noexcept
#if _LIBCUDACXX_STD_VER > 11
: __i{}
#endif
{
#ifdef _LIBCUDACXX_ENABLE_DEBUG_MODE
__get_db()->__insert_i(this);
#endif
}
template <class _Up> _LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG
__wrap_iter(const __wrap_iter<_Up>& __u,
__enable_if_t<is_convertible<_Up, iterator_type>::value>* = 0) noexcept
: __i(__u.base())
{
#ifdef _LIBCUDACXX_ENABLE_DEBUG_MODE
__get_db()->__iterator_copy(this, &__u);
#endif
}
#ifdef _LIBCUDACXX_ENABLE_DEBUG_MODE
_LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG
__wrap_iter(const __wrap_iter& __x)
: __i(__x.base())
{
__get_db()->__iterator_copy(this, &__x);
}
_LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG
__wrap_iter& operator=(const __wrap_iter& __x)
{
if (this != &__x)
{
__get_db()->__iterator_copy(this, &__x);
__i = __x.__i;
}
return *this;
}
_LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG
~__wrap_iter()
{
__get_db()->__erase_i(this);
}
#endif
_LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG reference operator*() const noexcept
{
#ifdef _LIBCUDACXX_ENABLE_DEBUG_MODE
_LIBCUDACXX_ASSERT(__get_const_db()->__dereferenceable(this),
"Attempted to dereference a non-dereferenceable iterator");
#endif
return *__i;
}
_LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG pointer operator->() const noexcept
{
#ifdef _LIBCUDACXX_ENABLE_DEBUG_MODE
_LIBCUDACXX_ASSERT(__get_const_db()->__dereferenceable(this),
"Attempted to dereference a non-dereferenceable iterator");
#endif
return (pointer)_CUDA_VSTD::addressof(*__i);
}
_LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG __wrap_iter& operator++() noexcept
{
#ifdef _LIBCUDACXX_ENABLE_DEBUG_MODE
_LIBCUDACXX_ASSERT(__get_const_db()->__dereferenceable(this),
"Attempted to increment non-incrementable iterator");
#endif
++__i;
return *this;
}
_LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG __wrap_iter operator++(int) noexcept
{__wrap_iter __tmp(*this); ++(*this); return __tmp;}
_LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG __wrap_iter& operator--() noexcept
{
#ifdef _LIBCUDACXX_ENABLE_DEBUG_MODE
_LIBCUDACXX_ASSERT(__get_const_db()->__decrementable(this),
"Attempted to decrement non-decrementable iterator");
#endif
--__i;
return *this;
}
_LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG __wrap_iter operator--(int) noexcept
{__wrap_iter __tmp(*this); --(*this); return __tmp;}
_LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG __wrap_iter operator+ (difference_type __n) const noexcept
{__wrap_iter __w(*this); __w += __n; return __w;}
_LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG __wrap_iter& operator+=(difference_type __n) noexcept
{
#ifdef _LIBCUDACXX_ENABLE_DEBUG_MODE
_LIBCUDACXX_ASSERT(__get_const_db()->__addable(this, __n),
"Attempted to add/subtract iterator outside of valid range");
#endif
__i += __n;
return *this;
}
_LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG __wrap_iter operator- (difference_type __n) const noexcept
{return *this + (-__n);}
_LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG __wrap_iter& operator-=(difference_type __n) noexcept
{*this += -__n; return *this;}
_LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG reference operator[](difference_type __n) const noexcept
{
#ifdef _LIBCUDACXX_ENABLE_DEBUG_MODE
_LIBCUDACXX_ASSERT(__get_const_db()->__subscriptable(this, __n),
"Attempted to subscript iterator outside of valid range");
#endif
return __i[__n];
}
_LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG iterator_type base() const noexcept {return __i;}
private:
#ifdef _LIBCUDACXX_ENABLE_DEBUG_MODE
_LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG __wrap_iter(const void* __p, iterator_type __x) : __i(__x)
{
__get_db()->__insert_ic(this, __p);
}
#else
_LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG __wrap_iter(iterator_type __x) noexcept : __i(__x) {}
#endif
template <class _Up> friend class __wrap_iter;
template <class _CharT, class _Traits, class _Alloc> friend class basic_string;
template <class _Tp, class _Alloc> friend class vector;
template <class _Tp, size_t> friend class span;
template <class _Iter1, class _Iter2>
_LIBCUDACXX_HOST_DEVICE _LIBCUDACXX_CONSTEXPR_IF_NODEBUG friend
bool
operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) noexcept;
template <class _Iter1, class _Iter2>
_LIBCUDACXX_HOST_DEVICE _LIBCUDACXX_CONSTEXPR_IF_NODEBUG friend
bool
operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) noexcept;
template <class _Iter1, class _Iter2>
_LIBCUDACXX_HOST_DEVICE _LIBCUDACXX_CONSTEXPR_IF_NODEBUG friend
bool
operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) noexcept;
template <class _Iter1, class _Iter2>
_LIBCUDACXX_HOST_DEVICE _LIBCUDACXX_CONSTEXPR_IF_NODEBUG friend
bool
operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) noexcept;
template <class _Iter1, class _Iter2>
_LIBCUDACXX_HOST_DEVICE _LIBCUDACXX_CONSTEXPR_IF_NODEBUG friend
bool
operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) noexcept;
template <class _Iter1, class _Iter2>
_LIBCUDACXX_HOST_DEVICE _LIBCUDACXX_CONSTEXPR_IF_NODEBUG friend
bool
operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) noexcept;
template <class _Iter1, class _Iter2>
_LIBCUDACXX_HOST_DEVICE _LIBCUDACXX_CONSTEXPR_IF_NODEBUG friend
auto
operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) noexcept
-> decltype(__x.base() - __y.base());
template <class _Iter1>
_LIBCUDACXX_HOST_DEVICE _LIBCUDACXX_CONSTEXPR_IF_NODEBUG friend
__wrap_iter<_Iter1>
operator+(typename __wrap_iter<_Iter1>::difference_type, __wrap_iter<_Iter1>) noexcept;
template <class _Ip, class _Op> _LIBCUDACXX_HOST_DEVICE friend _Op copy(_Ip, _Ip, _Op);
template <class _B1, class _B2> _LIBCUDACXX_HOST_DEVICE friend _B2 copy_backward(_B1, _B1, _B2);
template <class _Ip, class _Op> _LIBCUDACXX_HOST_DEVICE friend _Op move(_Ip, _Ip, _Op);
template <class _B1, class _B2> _LIBCUDACXX_HOST_DEVICE friend _B2 move_backward(_B1, _B1, _B2);
#if _LIBCUDACXX_DEBUG_LEVEL < 2
template <class _Tp>
_LIBCUDACXX_HOST_DEVICE _LIBCUDACXX_CONSTEXPR_IF_NODEBUG friend
__enable_if_t
<
is_trivially_copy_assignable<_Tp>::value,
_Tp*
>
__unwrap_iter(__wrap_iter<_Tp*>);
#else
template <class _Tp>
inline _LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG
__enable_if_t
<
is_trivially_copy_assignable<_Tp>::value,
__wrap_iter<_Tp*>
>
__unwrap_iter(__wrap_iter<_Tp*> __i);
#endif
};
template <class _Iter1, class _Iter2>
inline _LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG
bool
operator==(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) noexcept
{
return __x.base() == __y.base();
}
template <class _Iter1, class _Iter2>
inline _LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG
bool
operator<(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) noexcept
{
#ifdef _LIBCUDACXX_ENABLE_DEBUG_MODE
_LIBCUDACXX_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y),
"Attempted to compare incomparable iterators");
#endif
return __x.base() < __y.base();
}
template <class _Iter1, class _Iter2>
inline _LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG
bool
operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) noexcept
{
return !(__x == __y);
}
template <class _Iter1, class _Iter2>
inline _LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG
bool
operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) noexcept
{
return __y < __x;
}
template <class _Iter1, class _Iter2>
inline _LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG
bool
operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) noexcept
{
return !(__x < __y);
}
template <class _Iter1, class _Iter2>
inline _LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG
bool
operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) noexcept
{
return !(__y < __x);
}
template <class _Iter1>
inline _LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG
bool
operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) noexcept
{
return !(__x == __y);
}
template <class _Iter1>
inline _LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG
bool
operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) noexcept
{
return __y < __x;
}
template <class _Iter1>
inline _LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG
bool
operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) noexcept
{
return !(__x < __y);
}
template <class _Iter1>
inline _LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG
bool
operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) noexcept
{
return !(__y < __x);
}
template <class _Iter1, class _Iter2>
inline _LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG
auto
operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) noexcept
-> decltype(__x.base() - __y.base())
{
#ifdef _LIBCUDACXX_ENABLE_DEBUG_MODE
_LIBCUDACXX_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y),
"Attempted to subtract incompatible iterators");
#endif
return __x.base() - __y.base();
}
template <class _Iter>
inline _LIBCUDACXX_INLINE_VISIBILITY _LIBCUDACXX_CONSTEXPR_IF_NODEBUG
__wrap_iter<_Iter>
operator+(typename __wrap_iter<_Iter>::difference_type __n,
__wrap_iter<_Iter> __x) noexcept
{
__x += __n;
return __x;
}
_LIBCUDACXX_END_NAMESPACE_STD
#endif // _LIBCUDACXX___ITERATOR_WRAP_ITER_H
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