derek.holloway
7502bf64a4
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78 lines
2.8 KiB
C++
78 lines
2.8 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) 2024 NVIDIA CORPORATION & AFFILIATES.
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: msvc-19.16
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// class cuda::std::ranges::subrange;
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#include <cuda/std/cassert>
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#include <cuda/std/ranges>
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#include "test_iterators.h"
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#include "test_macros.h"
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#if TEST_STD_VER > 2017
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template <cuda::std::ranges::subrange_kind K, class... Args>
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concept ValidSubrangeKind = requires { typename cuda::std::ranges::subrange<Args..., K>; };
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template <class... Args>
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concept ValidSubrange = requires { typename cuda::std::ranges::subrange<Args...>; };
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#else
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// clang is really not helpful here failing with concept emulation
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template <class It, class = void>
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constexpr bool ValidSubrange1 = false;
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template <class It>
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constexpr bool ValidSubrange1<It, cuda::std::void_t<cuda::std::ranges::subrange<It>>> = true;
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template <class It, class Sent, class = void>
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constexpr bool ValidSubrange2 = false;
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template <class It, class Sent>
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constexpr bool ValidSubrange2<It, Sent, cuda::std::void_t<cuda::std::ranges::subrange<It, Sent>>> = true;
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template <class...>
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constexpr bool ValidSubrange = false;
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template <class It>
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constexpr bool ValidSubrange<It> = ValidSubrange1<It>;
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template <class It, class Sent>
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constexpr bool ValidSubrange<It, Sent> = ValidSubrange2<It, Sent>;
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template <cuda::std::ranges::subrange_kind Kind, class It, class Sent, class = void>
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constexpr bool ValidSubrangeKind = false;
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template <cuda::std::ranges::subrange_kind Kind, class It, class Sent>
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constexpr bool ValidSubrangeKind<Kind, It, Sent, cuda::std::void_t<cuda::std::ranges::subrange<It, Sent, Kind>>> = true;
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#endif
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static_assert(ValidSubrange<forward_iterator<int*>>);
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static_assert(ValidSubrange<forward_iterator<int*>, forward_iterator<int*>>);
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static_assert(
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ValidSubrangeKind<cuda::std::ranges::subrange_kind::unsized, forward_iterator<int*>, forward_iterator<int*>>);
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static_assert(
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ValidSubrangeKind<cuda::std::ranges::subrange_kind::sized, forward_iterator<int*>, forward_iterator<int*>>);
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// Wrong sentinel type.
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static_assert(!ValidSubrange<forward_iterator<int*>, int*>);
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static_assert(ValidSubrange<int*>);
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static_assert(ValidSubrange<int*, int*>);
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// Must be sized.
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static_assert(!ValidSubrangeKind<cuda::std::ranges::subrange_kind::unsized, int*, int*>);
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static_assert(ValidSubrangeKind<cuda::std::ranges::subrange_kind::sized, int*, int*>);
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// Wrong sentinel type.
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static_assert(!ValidSubrange<int*, forward_iterator<int*>>);
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// Not an iterator.
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static_assert(!ValidSubrange<int>);
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int main(int, char**)
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{
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return 0;
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}
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