third_party/llvm-project/libcxx/test/std/ranges/range.adaptors/range.zip/range.concept.compile.pass.cpp

//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20

// test if zip_view models input_range, forward_range, bidirectional_range,
//                         random_access_range, contiguous_range, common_range
//                         sized_range

#include <cassert>
#include <concepts>
#include <ranges>
#include <tuple>
#include <utility>

#include "types.h"

void testConceptPair() {
  int buffer1[2] = {1, 2};
  int buffer2[3] = {1, 2, 3};
  {
    std::ranges::zip_view v{ContiguousCommonView{buffer1}, ContiguousCommonView{buffer2}};
    using View = decltype(v);
    static_assert(std::ranges::random_access_range<View>);
    static_assert(!std::ranges::contiguous_range<View>);
    static_assert(std::ranges::common_range<View>);
    static_assert(std::ranges::sized_range<View>);
  }

  {
    std::ranges::zip_view v{ContiguousNonCommonView{buffer1}, ContiguousNonCommonView{buffer2}};
    using View = decltype(v);
    static_assert(std::ranges::random_access_range<View>);
    static_assert(!std::ranges::contiguous_range<View>);
    static_assert(!std::ranges::common_range<View>);
    static_assert(!std::ranges::sized_range<View>);
  }

  {
    std::ranges::zip_view v{ContiguousNonCommonSized{buffer1}, ContiguousNonCommonSized{buffer2}};
    using View = decltype(v);
    static_assert(std::ranges::random_access_range<View>);
    static_assert(!std::ranges::contiguous_range<View>);
    static_assert(std::ranges::common_range<View>);
    static_assert(std::ranges::sized_range<View>);
  }

  {
    std::ranges::zip_view v{SizedRandomAccessView{buffer1}, ContiguousCommonView{buffer2}};
    using View = decltype(v);
    static_assert(std::ranges::random_access_range<View>);
    static_assert(!std::ranges::contiguous_range<View>);
    static_assert(std::ranges::common_range<View>);
    static_assert(std::ranges::sized_range<View>);
  }

  {
    std::ranges::zip_view v{SizedRandomAccessView{buffer1}, SizedRandomAccessView{buffer2}};
    using View = decltype(v);
    static_assert(std::ranges::random_access_range<View>);
    static_assert(!std::ranges::contiguous_range<View>);
    static_assert(std::ranges::common_range<View>);
    static_assert(std::ranges::sized_range<View>);
  }

  {
    std::ranges::zip_view v{NonSizedRandomAccessView{buffer1}, NonSizedRandomAccessView{buffer2}};
    using View = decltype(v);
    static_assert(std::ranges::random_access_range<View>);
    static_assert(!std::ranges::contiguous_range<View>);
    static_assert(!std::ranges::common_range<View>);
    static_assert(!std::ranges::sized_range<View>);
  }

  {
    std::ranges::zip_view v{BidiCommonView{buffer1}, SizedRandomAccessView{buffer2}};
    using View = decltype(v);
    static_assert(std::ranges::bidirectional_range<View>);
    static_assert(!std::ranges::random_access_range<View>);
    static_assert(!std::ranges::common_range<View>);
    static_assert(!std::ranges::sized_range<View>);
  }

  {
    std::ranges::zip_view v{BidiCommonView{buffer1}, BidiCommonView{buffer2}};
    using View = decltype(v);
    static_assert(std::ranges::bidirectional_range<View>);
    static_assert(!std::ranges::random_access_range<View>);
    static_assert(!std::ranges::common_range<View>);
    static_assert(!std::ranges::sized_range<View>);
  }

  {
    std::ranges::zip_view v{BidiCommonView{buffer1}, ForwardSizedView{buffer2}};
    using View = decltype(v);
    static_assert(std::ranges::forward_range<View>);
    static_assert(!std::ranges::bidirectional_range<View>);
    static_assert(std::ranges::common_range<View>);
    static_assert(!std::ranges::sized_range<View>);
  }

  {
    std::ranges::zip_view v{BidiNonCommonView{buffer1}, ForwardSizedView{buffer2}};
    using View = decltype(v);
    static_assert(std::ranges::forward_range<View>);
    static_assert(!std::ranges::bidirectional_range<View>);
    static_assert(!std::ranges::common_range<View>);
    static_assert(!std::ranges::sized_range<View>);
  }

  {
    std::ranges::zip_view v{ForwardSizedView{buffer1}, ForwardSizedView{buffer2}};
    using View = decltype(v);
    static_assert(std::ranges::forward_range<View>);
    static_assert(!std::ranges::bidirectional_range<View>);
    static_assert(std::ranges::common_range<View>);
    static_assert(std::ranges::sized_range<View>);
  }

  {
    std::ranges::zip_view v{ForwardSizedNonCommon{buffer1}, ForwardSizedView{buffer2}};
    using View = decltype(v);
    static_assert(std::ranges::forward_range<View>);
    static_assert(!std::ranges::bidirectional_range<View>);
    static_assert(!std::ranges::common_range<View>);
    static_assert(std::ranges::sized_range<View>);
  }

  {
    std::ranges::zip_view v{InputCommonView{buffer1}, ForwardSizedView{buffer2}};
    using View = decltype(v);
    static_assert(std::ranges::input_range<View>);
    static_assert(!std::ranges::forward_range<View>);
    static_assert(std::ranges::common_range<View>);
    static_assert(!std::ranges::sized_range<View>);
  }

  {
    std::ranges::zip_view v{InputCommonView{buffer1}, InputCommonView{buffer2}};
    using View = decltype(v);
    static_assert(std::ranges::input_range<View>);
    static_assert(!std::ranges::forward_range<View>);
    static_assert(std::ranges::common_range<View>);
    static_assert(!std::ranges::sized_range<View>);
  }

  {
    std::ranges::zip_view v{InputNonCommonView{buffer1}, InputCommonView{buffer2}};
    using View = decltype(v);
    static_assert(std::ranges::input_range<View>);
    static_assert(!std::ranges::forward_range<View>);
    static_assert(!std::ranges::common_range<View>);
    static_assert(!std::ranges::sized_range<View>);
  }
}

void testConceptTuple() {
  int buffer1[2] = {1, 2};
  int buffer2[3] = {1, 2, 3};
  int buffer3[4] = {1, 2, 3, 4};

  {
    std::ranges::zip_view v{ContiguousCommonView{buffer1}, ContiguousCommonView{buffer2},
                            ContiguousCommonView{buffer3}};
    using View = decltype(v);
    static_assert(std::ranges::random_access_range<View>);
    static_assert(!std::ranges::contiguous_range<View>);
    static_assert(std::ranges::common_range<View>);
    static_assert(std::ranges::sized_range<View>);
  }

  {
    std::ranges::zip_view v{ContiguousNonCommonView{buffer1}, ContiguousNonCommonView{buffer2},
                            ContiguousNonCommonView{buffer3}};
    using View = decltype(v);
    static_assert(std::ranges::random_access_range<View>);
    static_assert(!std::ranges::contiguous_range<View>);
    static_assert(!std::ranges::common_range<View>);
    static_assert(!std::ranges::sized_range<View>);
  }

  {
    std::ranges::zip_view v{ContiguousNonCommonSized{buffer1}, ContiguousNonCommonSized{buffer2},
                            ContiguousNonCommonSized{buffer3}};
    using View = decltype(v);
    static_assert(std::ranges::random_access_range<View>);
    static_assert(!std::ranges::contiguous_range<View>);
    static_assert(std::ranges::common_range<View>);
    static_assert(std::ranges::sized_range<View>);
  }

  {
    std::ranges::zip_view v{SizedRandomAccessView{buffer1}, ContiguousCommonView{buffer2},
                            ContiguousCommonView{buffer3}};
    using View = decltype(v);
    static_assert(std::ranges::random_access_range<View>);
    static_assert(!std::ranges::contiguous_range<View>);
    static_assert(std::ranges::common_range<View>);
    static_assert(std::ranges::sized_range<View>);
  }

  {
    std::ranges::zip_view v{SizedRandomAccessView{buffer1}, SizedRandomAccessView{buffer2},
                            SizedRandomAccessView{buffer3}};
    using View = decltype(v);
    static_assert(std::ranges::random_access_range<View>);
    static_assert(!std::ranges::contiguous_range<View>);
    static_assert(std::ranges::common_range<View>);
    static_assert(std::ranges::sized_range<View>);
  }

  {
    std::ranges::zip_view v{NonSizedRandomAccessView{buffer1}, NonSizedRandomAccessView{buffer2},
                            NonSizedRandomAccessView{buffer3}};
    using View = decltype(v);
    static_assert(std::ranges::random_access_range<View>);
    static_assert(!std::ranges::contiguous_range<View>);
    static_assert(!std::ranges::common_range<View>);
    static_assert(!std::ranges::sized_range<View>);
  }

  {
    std::ranges::zip_view v{BidiCommonView{buffer1}, SizedRandomAccessView{buffer2}, SizedRandomAccessView{buffer3}};
    using View = decltype(v);
    static_assert(std::ranges::bidirectional_range<View>);
    static_assert(!std::ranges::random_access_range<View>);
    static_assert(!std::ranges::common_range<View>);
    static_assert(!std::ranges::sized_range<View>);
  }

  {
    std::ranges::zip_view v{BidiCommonView{buffer1}, BidiCommonView{buffer2}, BidiCommonView{buffer3}};
    using View = decltype(v);
    static_assert(std::ranges::bidirectional_range<View>);
    static_assert(!std::ranges::random_access_range<View>);
    static_assert(!std::ranges::common_range<View>);
    static_assert(!std::ranges::sized_range<View>);
  }

  {
    std::ranges::zip_view v{BidiCommonView{buffer1}, ForwardSizedView{buffer2}, ForwardSizedView{buffer3}};
    using View = decltype(v);
    static_assert(std::ranges::forward_range<View>);
    static_assert(!std::ranges::bidirectional_range<View>);
    static_assert(std::ranges::common_range<View>);
    static_assert(!std::ranges::sized_range<View>);
  }

  {
    std::ranges::zip_view v{BidiNonCommonView{buffer1}, ForwardSizedView{buffer2}, ForwardSizedView{buffer3}};
    using View = decltype(v);
    static_assert(std::ranges::forward_range<View>);
    static_assert(!std::ranges::bidirectional_range<View>);
    static_assert(!std::ranges::common_range<View>);
    static_assert(!std::ranges::sized_range<View>);
  }

  {
    std::ranges::zip_view v{ForwardSizedView{buffer1}, ForwardSizedView{buffer2}, ForwardSizedView{buffer3}};
    using View = decltype(v);
    static_assert(std::ranges::forward_range<View>);
    static_assert(!std::ranges::bidirectional_range<View>);
    static_assert(std::ranges::common_range<View>);
    static_assert(std::ranges::sized_range<View>);
  }

  {
    std::ranges::zip_view v{ForwardSizedNonCommon{buffer1}, ForwardSizedView{buffer2}, ForwardSizedView{buffer3}};
    using View = decltype(v);
    static_assert(std::ranges::forward_range<View>);
    static_assert(!std::ranges::bidirectional_range<View>);
    static_assert(!std::ranges::common_range<View>);
    static_assert(std::ranges::sized_range<View>);
  }

  {
    std::ranges::zip_view v{InputCommonView{buffer1}, ForwardSizedView{buffer2}, ForwardSizedView{buffer3}};
    using View = decltype(v);
    static_assert(std::ranges::input_range<View>);
    static_assert(!std::ranges::forward_range<View>);
    static_assert(std::ranges::common_range<View>);
    static_assert(!std::ranges::sized_range<View>);
  }

  {
    std::ranges::zip_view v{InputCommonView{buffer1}, InputCommonView{buffer2}, InputCommonView{buffer3}};
    using View = decltype(v);
    static_assert(std::ranges::input_range<View>);
    static_assert(!std::ranges::forward_range<View>);
    static_assert(std::ranges::common_range<View>);
    static_assert(!std::ranges::sized_range<View>);
  }

  {
    std::ranges::zip_view v{InputNonCommonView{buffer1}, InputCommonView{buffer2}, InputCommonView{buffer3}};
    using View = decltype(v);
    static_assert(std::ranges::input_range<View>);
    static_assert(!std::ranges::forward_range<View>);
    static_assert(!std::ranges::common_range<View>);
    static_assert(!std::ranges::sized_range<View>);
  }
}

using OutputIter = cpp17_output_iterator<int*>;
static_assert(std::output_iterator<OutputIter, int>);

struct OutputView : std::ranges::view_base {
  OutputIter begin() const;
  sentinel_wrapper<OutputIter> end() const;
};
static_assert(std::ranges::output_range<OutputView, int>);
static_assert(!std::ranges::input_range<OutputView>);

template <class... Ts>
concept zippable = requires {
  typename std::ranges::zip_view<Ts...>;
};

// output_range is not supported
static_assert(!zippable<OutputView>);
static_assert(!zippable<SimpleCommon, OutputView>);
static_assert(zippable<SimpleCommon>);