9783f28cbb
This patch runs clang-format on all of libcxx/include and libcxx/src, in
accordance with the RFC discussed at [1]. Follow-up patches will format
the benchmarks, the test suite and remaining parts of the code. I'm
splitting this one into its own patch so the diff is a bit easier to
review.
This patch was generated with:
find libcxx/include libcxx/src -type f \
| grep -v 'module.modulemap.in' \
| grep -v 'CMakeLists.txt' \
| grep -v 'README.txt' \
| grep -v 'libcxx.imp' \
| grep -v '__config_site.in' \
| xargs clang-format -i
A Git merge driver is available in libcxx/utils/clang-format-merge-driver.sh
to help resolve merge and rebase issues across these formatting changes.
[1]: https://discourse.llvm.org/t/rfc-clang-formatting-all-of-libc-once-and-for-all
75 lines
2.1 KiB
C++
75 lines
2.1 KiB
C++
// -*- C++ -*-
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef _LIBCPP___ITERATOR_PREV_H
|
|
#define _LIBCPP___ITERATOR_PREV_H
|
|
|
|
#include <__assert>
|
|
#include <__config>
|
|
#include <__iterator/advance.h>
|
|
#include <__iterator/concepts.h>
|
|
#include <__iterator/incrementable_traits.h>
|
|
#include <__iterator/iterator_traits.h>
|
|
#include <__type_traits/enable_if.h>
|
|
|
|
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
|
# pragma GCC system_header
|
|
#endif
|
|
|
|
_LIBCPP_BEGIN_NAMESPACE_STD
|
|
|
|
template <class _InputIter, __enable_if_t<__has_input_iterator_category<_InputIter>::value, int> = 0>
|
|
inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 _InputIter
|
|
prev(_InputIter __x, typename iterator_traits<_InputIter>::difference_type __n = 1) {
|
|
_LIBCPP_ASSERT_UNCATEGORIZED(__n <= 0 || __has_bidirectional_iterator_category<_InputIter>::value,
|
|
"Attempt to prev(it, n) with a positive n on a non-bidirectional iterator");
|
|
std::advance(__x, -__n);
|
|
return __x;
|
|
}
|
|
|
|
#if _LIBCPP_STD_VER >= 20
|
|
|
|
// [range.iter.op.prev]
|
|
|
|
namespace ranges {
|
|
namespace __prev {
|
|
|
|
struct __fn {
|
|
template <bidirectional_iterator _Ip>
|
|
_LIBCPP_HIDE_FROM_ABI constexpr _Ip operator()(_Ip __x) const {
|
|
--__x;
|
|
return __x;
|
|
}
|
|
|
|
template <bidirectional_iterator _Ip>
|
|
_LIBCPP_HIDE_FROM_ABI constexpr _Ip operator()(_Ip __x, iter_difference_t<_Ip> __n) const {
|
|
ranges::advance(__x, -__n);
|
|
return __x;
|
|
}
|
|
|
|
template <bidirectional_iterator _Ip>
|
|
_LIBCPP_HIDE_FROM_ABI constexpr _Ip operator()(_Ip __x, iter_difference_t<_Ip> __n, _Ip __bound_iter) const {
|
|
ranges::advance(__x, -__n, __bound_iter);
|
|
return __x;
|
|
}
|
|
};
|
|
|
|
} // namespace __prev
|
|
|
|
inline namespace __cpo {
|
|
inline constexpr auto prev = __prev::__fn{};
|
|
} // namespace __cpo
|
|
} // namespace ranges
|
|
|
|
#endif // _LIBCPP_STD_VER >= 20
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
#endif // _LIBCPP___ITERATOR_PREV_H
|