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d10dc5a06f
We originally put implementation-detail function objects into individual namespaces for `std::ranges` without a good reason for doing so. This practice was continued, presumably because there was prior art. Since there's no reason to keep these namespaces, this commit removes them, which will slightly impact binary size. This commit does not apply to CPOs, some of which need additional work.
65 lines
2.1 KiB
C++
65 lines
2.1 KiB
C++
//===----------------------------------------------------------------------===//
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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___ALGORITHM_RANGES_CLAMP_H
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#define _LIBCPP___ALGORITHM_RANGES_CLAMP_H
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#include <__assert>
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#include <__config>
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#include <__functional/identity.h>
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#include <__functional/invoke.h>
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#include <__functional/ranges_operations.h>
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#include <__iterator/concepts.h>
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#include <__iterator/projected.h>
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#include <__utility/forward.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 >= 20
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_LIBCPP_BEGIN_NAMESPACE_STD
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namespace ranges {
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struct __clamp {
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template <class _Type,
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class _Proj = identity,
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indirect_strict_weak_order<projected<const _Type*, _Proj>> _Comp = ranges::less>
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[[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr const _Type& operator()(
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const _Type& __value, const _Type& __low, const _Type& __high, _Comp __comp = {}, _Proj __proj = {}) const {
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_LIBCPP_ASSERT_ARGUMENT_WITHIN_DOMAIN(
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!bool(std::invoke(__comp, std::invoke(__proj, __high), std::invoke(__proj, __low))),
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"Bad bounds passed to std::ranges::clamp");
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auto&& __projected = std::invoke(__proj, __value);
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if (std::invoke(__comp, std::forward<decltype(__projected)>(__projected), std::invoke(__proj, __low)))
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return __low;
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else if (std::invoke(__comp, std::invoke(__proj, __high), std::forward<decltype(__projected)>(__projected)))
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return __high;
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else
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return __value;
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}
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};
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inline namespace __cpo {
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inline constexpr auto clamp = __clamp{};
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} // namespace __cpo
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} // namespace ranges
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP_STD_VER >= 20
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_LIBCPP_POP_MACROS
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#endif // _LIBCPP___ALGORITHM_RANGES_CLAMP_H
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