ad2fbea797
This has the benefit of consistent placement for these macros (outside the namespace, not inside it). This, in turn, makes it more obvious that the condition applies to the entire namespace scope. Compile times are also reduced a bit, since the compiler doesn't have to open a namespace just to close it again. This is enforced with a clang-tidy check. As a drive-by this also fixes a few macro comments.
55 lines
1.7 KiB
C++
55 lines
1.7 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___NUMERIC_REDUCE_H
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#define _LIBCPP___NUMERIC_REDUCE_H
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#include <__config>
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#include <__functional/operations.h>
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#include <__iterator/iterator_traits.h>
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#include <__utility/move.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_PUSH_MACROS
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#include <__undef_macros>
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#if _LIBCPP_STD_VER >= 17
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_LIBCPP_BEGIN_NAMESPACE_STD
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template <class _InputIterator, class _Tp, class _BinaryOp>
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[[nodiscard]] _LIBCPP_HIDE_FROM_ABI
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_LIBCPP_CONSTEXPR_SINCE_CXX20 _Tp reduce(_InputIterator __first, _InputIterator __last, _Tp __init, _BinaryOp __b) {
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for (; __first != __last; ++__first)
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__init = __b(std::move(__init), *__first);
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return __init;
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}
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template <class _InputIterator, class _Tp>
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[[nodiscard]] _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _Tp
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reduce(_InputIterator __first, _InputIterator __last, _Tp __init) {
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return std::reduce(__first, __last, __init, std::plus<>());
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}
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template <class _InputIterator>
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[[nodiscard]] _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 typename iterator_traits<_InputIterator>::value_type
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reduce(_InputIterator __first, _InputIterator __last) {
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return std::reduce(__first, __last, typename iterator_traits<_InputIterator>::value_type{});
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}
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP_STD_VER >= 17
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_LIBCPP_POP_MACROS
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#endif // _LIBCPP___NUMERIC_REDUCE_H
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