2eb2ff2a02
The macro that opts out of `std::ranges::` functionality is called `_LIBCPP_HAS_NO_INCOMPLETE_RANGES`, and is unrelated to this macro which is specifically about _compiler_ support for the _syntax_. The only non-mechanical diff here is in `<__config>`. Differential Revision: https://reviews.llvm.org/D118507
41 lines
1.2 KiB
C++
41 lines
1.2 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_PROJECTED_H
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#define _LIBCPP___ITERATOR_PROJECTED_H
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#include <__config>
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#include <__iterator/concepts.h>
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#include <__iterator/incrementable_traits.h>
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#include <type_traits>
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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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#if !defined(_LIBCPP_HAS_NO_CONCEPTS)
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template<indirectly_readable _It, indirectly_regular_unary_invocable<_It> _Proj>
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struct projected {
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using value_type = remove_cvref_t<indirect_result_t<_Proj&, _It>>;
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indirect_result_t<_Proj&, _It> operator*() const; // not defined
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};
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template<weakly_incrementable _It, class _Proj>
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struct incrementable_traits<projected<_It, _Proj>> {
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using difference_type = iter_difference_t<_It>;
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};
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#endif // !defined(_LIBCPP_HAS_NO_CONCEPTS)
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___ITERATOR_PROJECTED_H
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