derek.holloway
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97 lines
3.7 KiB
C++
97 lines
3.7 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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// SPDX-FileCopyrightText: Copyright (c) 2023 NVIDIA CORPORATION & AFFILIATES.
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCUDACXX___CONCEPTS_EQUALITY_COMPARABLE_H
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#define _LIBCUDACXX___CONCEPTS_EQUALITY_COMPARABLE_H
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#include <cuda/std/detail/__config>
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#if defined(_CCCL_IMPLICIT_SYSTEM_HEADER_GCC)
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# pragma GCC system_header
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#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_CLANG)
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# pragma clang system_header
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#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_MSVC)
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# pragma system_header
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#endif // no system header
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#include <cuda/std/__concepts/boolean_testable.h>
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#include <cuda/std/__concepts/common_reference_with.h>
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#include <cuda/std/__concepts/concept_macros.h>
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#include <cuda/std/__type_traits/common_reference.h>
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#include <cuda/std/__type_traits/make_const_lvalue_ref.h>
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_LIBCUDACXX_BEGIN_NAMESPACE_STD
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#if !defined(_CCCL_NO_CONCEPTS)
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// [concept.equalitycomparable]
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template <class _Tp, class _Up>
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concept __weakly_equality_comparable_with =
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requires(__make_const_lvalue_ref<_Tp> __t, __make_const_lvalue_ref<_Up> __u) {
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{ __t == __u } -> __boolean_testable;
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{ __t != __u } -> __boolean_testable;
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{ __u == __t } -> __boolean_testable;
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{ __u != __t } -> __boolean_testable;
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};
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template <class _Tp>
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concept equality_comparable = __weakly_equality_comparable_with<_Tp, _Tp>;
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template <class _Tp, class _Up>
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concept equality_comparable_with =
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equality_comparable<_Tp> && equality_comparable<_Up>
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&& common_reference_with<__make_const_lvalue_ref<_Tp>, __make_const_lvalue_ref<_Up>>
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&& equality_comparable<common_reference_t<__make_const_lvalue_ref<_Tp>, __make_const_lvalue_ref<_Up>>>
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&& __weakly_equality_comparable_with<_Tp, _Up>;
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#elif !defined(_CCCL_NO_VARIABLE_TEMPLATES) // ^^^ !_CCCL_NO_CONCEPTS ^^^
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template <class _Tp>
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_CCCL_CONCEPT_FRAGMENT(__with_lvalue_reference_, requires()(typename(__make_const_lvalue_ref<_Tp>)));
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template <class _Tp>
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_CCCL_CONCEPT _With_lvalue_reference = _CCCL_FRAGMENT(__with_lvalue_reference_, _Tp);
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template <class _Tp, class _Up>
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_CCCL_CONCEPT_FRAGMENT(
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__weakly_equality_comparable_with_,
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requires(__make_const_lvalue_ref<_Tp> __t, __make_const_lvalue_ref<_Up> __u)(
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requires(_With_lvalue_reference<_Tp>),
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requires(_With_lvalue_reference<_Up>),
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requires(__boolean_testable<decltype(__t == __u)>),
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requires(__boolean_testable<decltype(__t != __u)>),
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requires(__boolean_testable<decltype(__u == __t)>),
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requires(__boolean_testable<decltype(__u != __t)>)));
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template <class _Tp, class _Up>
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_CCCL_CONCEPT __weakly_equality_comparable_with = _CCCL_FRAGMENT(__weakly_equality_comparable_with_, _Tp, _Up);
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template <class _Tp>
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_CCCL_CONCEPT equality_comparable = __weakly_equality_comparable_with<_Tp, _Tp>;
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template <class _Tp, class _Up>
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_CCCL_CONCEPT_FRAGMENT(
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__equality_comparable_with_,
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requires()(
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requires(equality_comparable<_Tp>),
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requires(equality_comparable<_Up>),
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requires(common_reference_with<__make_const_lvalue_ref<_Tp>, __make_const_lvalue_ref<_Up>>),
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requires(equality_comparable<common_reference_t<__make_const_lvalue_ref<_Tp>, __make_const_lvalue_ref<_Up>>>),
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requires(__weakly_equality_comparable_with<_Tp, _Up>)));
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template <class _Tp, class _Up>
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_CCCL_CONCEPT equality_comparable_with = _CCCL_FRAGMENT(__equality_comparable_with_, _Tp, _Up);
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#endif // ^^^ !_CCCL_NO_VARIABLE_TEMPLATES
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_LIBCUDACXX_END_NAMESPACE_STD
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#endif // _LIBCUDACXX___CONCEPTS_EQUALITY_COMPARABLE_H
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