7227ec98ad
These traits can be expressed without having to instantiate any classes, reducing compile times slightly.
41 lines
1.3 KiB
C++
41 lines
1.3 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_RANGES_ITERATOR_TRAITS_H
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#define _LIBCPP___ITERATOR_RANGES_ITERATOR_TRAITS_H
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#include <__config>
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#include <__fwd/pair.h>
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#include <__ranges/concepts.h>
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#include <__type_traits/remove_const.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_BEGIN_NAMESPACE_STD
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#if _LIBCPP_STD_VER >= 23
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template <ranges::input_range _Range>
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using __range_key_type = __remove_const_t<typename ranges::range_value_t<_Range>::first_type>;
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template <ranges::input_range _Range>
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using __range_mapped_type = typename ranges::range_value_t<_Range>::second_type;
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template <ranges::input_range _Range>
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using __range_to_alloc_type =
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pair<const typename ranges::range_value_t<_Range>::first_type, typename ranges::range_value_t<_Range>::second_type>;
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#endif
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___ITERATOR_RANGES_ITERATOR_TRAITS_H
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