[libcxx-commits] [libcxx] [libc++][NFC] Check for take_view returning different types depending on simple_view-ness (PR #79085)
Will Hawkins via libcxx-commits
libcxx-commits at lists.llvm.org
Wed Jan 24 18:57:06 PST 2024
https://github.com/hawkinsw updated https://github.com/llvm/llvm-project/pull/79085
>From 60a03ea866f96719d45714cc22bcca4df6399fc1 Mon Sep 17 00:00:00 2001
From: Will Hawkins <hawkinsw at obs.cr>
Date: Mon, 22 Jan 2024 22:14:20 -0500
Subject: [PATCH 1/5] [libc++][NFC] Check for take_view returning different
types depending on simple_view-ness
Add a check to make sure that an instance of a
take_view::_iterator<false> is returned when the base type is not a simple
view nor a sized view.
---
.../range.adaptors/range.take/end.pass.cpp | 21 ++++++++++++
.../ranges/range.adaptors/range.take/types.h | 33 +++++++++++++++++++
2 files changed, 54 insertions(+)
diff --git a/libcxx/test/std/ranges/range.adaptors/range.take/end.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.take/end.pass.cpp
index 6cab05daa9e059a..a54b81c83e6aadb 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.take/end.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.take/end.pass.cpp
@@ -69,6 +69,27 @@ constexpr bool test() {
assert(tv.end() == std::ranges::next(tv.begin(), 8));
}
+ // Check that (non-)simple, non-sized views have different types for their end() member function.
+ {
+ // These assertions must be true in order to trigger the different paths through the end member function
+ // that will return values with different types:
+ static_assert(!simple_view<NonSimpleViewNonSized>);
+ static_assert(!std::ranges::sized_range<NonSimpleViewNonSized>);
+ static_assert(simple_view<SimpleViewNonSized>);
+ static_assert(std::ranges::range<const SimpleViewNonSized>);
+ static_assert(!std::ranges::sized_range<const SimpleViewNonSized>);
+
+ std::ranges::take_view<NonSimpleViewNonSized> tvns(NonSimpleViewNonSized{buffer, buffer + 8}, 0);
+ std::ranges::take_view<SimpleViewNonSized> tvs(SimpleViewNonSized{buffer, buffer + 8}, 0);
+
+ // __iterator<false> has base with type std::ranges::sentinel_t<NonSimpleViewNonSized>; adding a const qualifier
+ // would change the equality.
+ static_assert(!std::is_same_v<decltype(tvns.end().base()), std::ranges::sentinel_t<const NonSimpleViewNonSized>>);
+ // __iterator<true> has base with type std::ranges::sentinel_t<const NonSimpleViewNonSized>; adding a const qualifier
+ // would not change the equality.
+ static_assert(std::is_same_v<decltype(tvs.end().base()), std::ranges::sentinel_t<const SimpleViewNonSized>>);
+ }
+
return true;
}
diff --git a/libcxx/test/std/ranges/range.adaptors/range.take/types.h b/libcxx/test/std/ranges/range.adaptors/range.take/types.h
index db80e68bb21afef..083e02ac7cac7ca 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.take/types.h
+++ b/libcxx/test/std/ranges/range.adaptors/range.take/types.h
@@ -65,4 +65,37 @@ struct View : std::ranges::view_base {
int* end_;
};
+template <bool Simple>
+struct InputView : std::ranges::view_base {
+ constexpr explicit InputView(int* b, int* e) : begin_(b), end_(e) {}
+
+ constexpr common_input_iterator<int*> begin() const { return common_input_iterator<int*>(begin_); }
+ constexpr common_input_iterator<int*> end() const { return common_input_iterator<int*>(end_); }
+
+ constexpr common_input_iterator<const int*> begin()
+ requires(!Simple)
+ {
+ return common_input_iterator<const int*>(begin_);
+ }
+ constexpr common_input_iterator<const int*> end()
+ requires(!Simple)
+ {
+ return common_input_iterator<const int*>(end_);
+ }
+
+private:
+ int* begin_;
+ int* end_;
+};
+
+using NonSimpleViewNonSized = InputView<false>;
+static_assert(std::ranges::view<NonSimpleViewNonSized>);
+static_assert(!simple_view<NonSimpleViewNonSized>);
+static_assert(!std::ranges::sized_range<NonSimpleViewNonSized>);
+
+using SimpleViewNonSized = InputView<true>;
+static_assert(!std::ranges::sized_range<SimpleViewNonSized>);
+static_assert(std::ranges::view<SimpleViewNonSized>);
+static_assert(simple_view<SimpleViewNonSized>);
+
#endif // TEST_STD_RANGES_RANGE_ADAPTORS_RANGE_TAKE_TYPES_H
>From bac7229289a9a6a6af3b074fd508488163f61d42 Mon Sep 17 00:00:00 2001
From: Will Hawkins <hawkinsw at obs.cr>
Date: Tue, 23 Jan 2024 15:54:07 -0500
Subject: [PATCH 2/5] fixup! [libc++][NFC] Check for take_view returning
different types depending on simple_view-ness
Rename test class and refactor.
---
.../range.adaptors/range.take/end.pass.cpp | 17 +++++------------
.../ranges/range.adaptors/range.take/types.h | 8 ++++----
2 files changed, 9 insertions(+), 16 deletions(-)
diff --git a/libcxx/test/std/ranges/range.adaptors/range.take/end.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.take/end.pass.cpp
index a54b81c83e6aadb..a5c1dfdca13adf1 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.take/end.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.take/end.pass.cpp
@@ -69,24 +69,17 @@ constexpr bool test() {
assert(tv.end() == std::ranges::next(tv.begin(), 8));
}
- // Check that (non-)simple, non-sized views have different types for their end() member function.
{
- // These assertions must be true in order to trigger the different paths through the end member function
- // that will return values with different types:
- static_assert(!simple_view<NonSimpleViewNonSized>);
- static_assert(!std::ranges::sized_range<NonSimpleViewNonSized>);
- static_assert(simple_view<SimpleViewNonSized>);
- static_assert(std::ranges::range<const SimpleViewNonSized>);
- static_assert(!std::ranges::sized_range<const SimpleViewNonSized>);
-
- std::ranges::take_view<NonSimpleViewNonSized> tvns(NonSimpleViewNonSized{buffer, buffer + 8}, 0);
- std::ranges::take_view<SimpleViewNonSized> tvs(SimpleViewNonSized{buffer, buffer + 8}, 0);
-
// __iterator<false> has base with type std::ranges::sentinel_t<NonSimpleViewNonSized>; adding a const qualifier
// would change the equality.
+ std::ranges::take_view<NonSimpleViewNonSized> tvns(NonSimpleViewNonSized{buffer, buffer + 8}, 0);
static_assert(!std::is_same_v<decltype(tvns.end().base()), std::ranges::sentinel_t<const NonSimpleViewNonSized>>);
+ }
+
+ {
// __iterator<true> has base with type std::ranges::sentinel_t<const NonSimpleViewNonSized>; adding a const qualifier
// would not change the equality.
+ std::ranges::take_view<SimpleViewNonSized> tvs(SimpleViewNonSized{buffer, buffer + 8}, 0);
static_assert(std::is_same_v<decltype(tvs.end().base()), std::ranges::sentinel_t<const SimpleViewNonSized>>);
}
diff --git a/libcxx/test/std/ranges/range.adaptors/range.take/types.h b/libcxx/test/std/ranges/range.adaptors/range.take/types.h
index 083e02ac7cac7ca..207505f0c72c123 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.take/types.h
+++ b/libcxx/test/std/ranges/range.adaptors/range.take/types.h
@@ -66,8 +66,8 @@ struct View : std::ranges::view_base {
};
template <bool Simple>
-struct InputView : std::ranges::view_base {
- constexpr explicit InputView(int* b, int* e) : begin_(b), end_(e) {}
+struct CommonInputView : std::ranges::view_base {
+ constexpr explicit CommonInputView(int* b, int* e) : begin_(b), end_(e) {}
constexpr common_input_iterator<int*> begin() const { return common_input_iterator<int*>(begin_); }
constexpr common_input_iterator<int*> end() const { return common_input_iterator<int*>(end_); }
@@ -88,12 +88,12 @@ struct InputView : std::ranges::view_base {
int* end_;
};
-using NonSimpleViewNonSized = InputView<false>;
+using NonSimpleViewNonSized = CommonInputView<false>;
static_assert(std::ranges::view<NonSimpleViewNonSized>);
static_assert(!simple_view<NonSimpleViewNonSized>);
static_assert(!std::ranges::sized_range<NonSimpleViewNonSized>);
-using SimpleViewNonSized = InputView<true>;
+using SimpleViewNonSized = CommonInputView<true>;
static_assert(!std::ranges::sized_range<SimpleViewNonSized>);
static_assert(std::ranges::view<SimpleViewNonSized>);
static_assert(simple_view<SimpleViewNonSized>);
>From 71d9a06148c753afe7892bf92bc10ec5bc7492a1 Mon Sep 17 00:00:00 2001
From: Will Hawkins <hawkinsw at obs.cr>
Date: Tue, 23 Jan 2024 15:55:48 -0500
Subject: [PATCH 3/5] fixup! [libc++][NFC] Check for take_view returning
different types depending on simple_view-ness
Rearrange static_asserts to match.
---
libcxx/test/std/ranges/range.adaptors/range.take/types.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libcxx/test/std/ranges/range.adaptors/range.take/types.h b/libcxx/test/std/ranges/range.adaptors/range.take/types.h
index 207505f0c72c123..68a6f1ab875c515 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.take/types.h
+++ b/libcxx/test/std/ranges/range.adaptors/range.take/types.h
@@ -94,8 +94,8 @@ static_assert(!simple_view<NonSimpleViewNonSized>);
static_assert(!std::ranges::sized_range<NonSimpleViewNonSized>);
using SimpleViewNonSized = CommonInputView<true>;
-static_assert(!std::ranges::sized_range<SimpleViewNonSized>);
static_assert(std::ranges::view<SimpleViewNonSized>);
static_assert(simple_view<SimpleViewNonSized>);
+static_assert(!std::ranges::sized_range<SimpleViewNonSized>);
#endif // TEST_STD_RANGES_RANGE_ADAPTORS_RANGE_TAKE_TYPES_H
>From 6b994f88af467caa57adc241c206c64e070c6022 Mon Sep 17 00:00:00 2001
From: Will Hawkins <hawkinsw at obs.cr>
Date: Wed, 24 Jan 2024 21:55:25 -0500
Subject: [PATCH 4/5] fixup! [libc++][NFC] Check for take_view returning
different types depending on simple_view-ness
Finish adding tests.
---
.../range.adaptors/range.take/begin.pass.cpp | 62 +++++++++++++++++--
.../range.adaptors/range.take/end.pass.cpp | 4 +-
.../ranges/range.adaptors/range.take/types.h | 41 ++++++++----
3 files changed, 87 insertions(+), 20 deletions(-)
diff --git a/libcxx/test/std/ranges/range.adaptors/range.take/begin.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.take/begin.pass.cpp
index 1873481d7322535..a5ab7ef3faffc78 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.take/begin.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.take/begin.pass.cpp
@@ -13,7 +13,9 @@
#include <ranges>
#include <cassert>
+#include <utility>
+#include "__ranges/concepts.h"
#include "test_macros.h"
#include "test_iterators.h"
#include "test_range.h"
@@ -30,8 +32,12 @@ static_assert(!std::ranges::sized_range<const NonCommonSimpleView>);
constexpr bool test() {
int buffer[8] = {1, 2, 3, 4, 5, 6, 7, 8};
- // sized_range && random_access_iterator
+ // simple-view<V> && sized_range<V> && random_access_range<V>
{
+ static_assert(simple_view<SizedRandomAccessView>);
+ static_assert(std::ranges::sized_range<SizedRandomAccessView>);
+ static_assert(std::ranges::random_access_range<SizedRandomAccessView>);
+
std::ranges::take_view<SizedRandomAccessView> tv(SizedRandomAccessView(buffer), 4);
assert(tv.begin() == SizedRandomAccessView(buffer).begin());
ASSERT_SAME_TYPE(decltype(tv.begin()), RandomAccessIter);
@@ -43,10 +49,14 @@ constexpr bool test() {
ASSERT_SAME_TYPE(decltype(tv.begin()), RandomAccessIter);
}
- // sized_range && !random_access_iterator
+ // simple-view<V> && sized_range<V> && !random_access_range<V>
{
- std::ranges::take_view<SizedForwardView> tv(SizedForwardView{buffer}, 4);
- assert(tv.begin() == std::counted_iterator<ForwardIter>(ForwardIter(buffer), 4));
+ static_assert(simple_view<SizedForwardView>);
+ static_assert(std::ranges::sized_range<SizedForwardView>);
+ static_assert(!std::ranges::random_access_range<SizedForwardView>);
+
+ std::ranges::take_view<SizedForwardView> tv(SizedForwardView{buffer}, 16); // underlying size is 8
+ assert(tv.begin() == std::counted_iterator<ForwardIter>(ForwardIter(buffer), 8)); // expect min(8, 16)
ASSERT_SAME_TYPE(decltype(tv.begin()), std::counted_iterator<ForwardIter>);
}
@@ -56,8 +66,10 @@ constexpr bool test() {
ASSERT_SAME_TYPE(decltype(tv.begin()), std::counted_iterator<ForwardIter>);
}
- // !sized_range
+ // simple-view<V> && !sized_range<V>
{
+ static_assert(simple_view<MoveOnlyView>);
+ static_assert(simple_view<MoveOnlyView>);
std::ranges::take_view<MoveOnlyView> tv(MoveOnlyView{buffer}, 4);
assert(tv.begin() == std::counted_iterator<int*>(buffer, 4));
ASSERT_SAME_TYPE(decltype(tv.begin()), std::counted_iterator<int*>);
@@ -69,13 +81,51 @@ constexpr bool test() {
ASSERT_SAME_TYPE(decltype(tv.begin()), std::counted_iterator<int*>);
}
- // simple-view<V> && sized_range<V> && !size_range<!V>
+ // simple-view<V> && sized_range<V> && !sized_range<const V>
{
+ static_assert(simple_view<NonCommonSimpleView>);
+ static_assert(std::ranges::sized_range<NonCommonSimpleView>);
+ static_assert(!std::ranges::sized_range<const NonCommonSimpleView>);
+
std::ranges::take_view<NonCommonSimpleView> tv{};
ASSERT_SAME_TYPE(decltype(tv.begin()), std::counted_iterator<int*>);
ASSERT_SAME_TYPE(decltype(std::as_const(tv).begin()), std::counted_iterator<int*>);
}
+ // non simple-view<V> && !sized_range<V>
+ {
+ static_assert(!simple_view<NonSimpleNonSizedView>);
+ static_assert(!std::ranges::sized_range<NonSimpleNonSizedView>);
+
+ std::ranges::take_view<NonSimpleNonSizedView> tv{NonSimpleNonSizedView{buffer, buffer + 2}, 4};
+ // The count for the counted iterator is the count of the take_view (i.e., 4)
+ assert(tv.begin() ==
+ std::counted_iterator<common_input_iterator<const int*>>(common_input_iterator<const int*>(buffer), 4));
+ ASSERT_SAME_TYPE(decltype(tv.begin()), std::counted_iterator<common_input_iterator<const int*>>);
+ }
+
+ // non simple-view<V> && sized_range<V>
+ {
+ static_assert(!simple_view<NonSimpleSizedView>);
+ static_assert(std::ranges::sized_range<NonSimpleSizedView>);
+
+ std::ranges::take_view<NonSimpleSizedView> tv{NonSimpleSizedView{buffer, buffer + 2}, 4};
+ // The count for the counted iterator is the min(2, 4) (i.e., 2).
+ assert(tv.begin() ==
+ std::counted_iterator<common_input_iterator<const int*>>(common_input_iterator<const int*>(buffer), 2));
+ ASSERT_SAME_TYPE(decltype(tv.begin()), std::counted_iterator<common_input_iterator<const int*>>);
+ }
+
+ // non simple-view<V> && sized_range<V> && random_access_range<V>
+ {
+ static_assert(!simple_view<NonSimpleSizedRandomView>);
+ static_assert(std::ranges::sized_range<NonSimpleSizedRandomView>);
+ static_assert(std::ranges::random_access_range<NonSimpleSizedRandomView>);
+
+ std::ranges::take_view<NonSimpleSizedRandomView> tv{NonSimpleSizedRandomView{buffer, buffer + 2}, 4};
+ assert(tv.begin() == random_access_iterator<const int*>(buffer));
+ ASSERT_SAME_TYPE(decltype(tv.begin()), random_access_iterator<const int*>);
+ }
return true;
}
diff --git a/libcxx/test/std/ranges/range.adaptors/range.take/end.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.take/end.pass.cpp
index a5c1dfdca13adf1..eddb39af2712145 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.take/end.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.take/end.pass.cpp
@@ -72,8 +72,8 @@ constexpr bool test() {
{
// __iterator<false> has base with type std::ranges::sentinel_t<NonSimpleViewNonSized>; adding a const qualifier
// would change the equality.
- std::ranges::take_view<NonSimpleViewNonSized> tvns(NonSimpleViewNonSized{buffer, buffer + 8}, 0);
- static_assert(!std::is_same_v<decltype(tvns.end().base()), std::ranges::sentinel_t<const NonSimpleViewNonSized>>);
+ std::ranges::take_view<NonSimpleNonSizedView> tvns(NonSimpleNonSizedView{buffer, buffer + 8}, 0);
+ static_assert(!std::is_same_v<decltype(tvns.end().base()), std::ranges::sentinel_t<const NonSimpleNonSizedView>>);
}
{
diff --git a/libcxx/test/std/ranges/range.adaptors/range.take/types.h b/libcxx/test/std/ranges/range.adaptors/range.take/types.h
index 68a6f1ab875c515..81b54b9fb2faff9 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.take/types.h
+++ b/libcxx/test/std/ranges/range.adaptors/range.take/types.h
@@ -65,22 +65,28 @@ struct View : std::ranges::view_base {
int* end_;
};
-template <bool Simple>
+template <template <class ...> typename Iter, bool Simple, bool Sized>
struct CommonInputView : std::ranges::view_base {
constexpr explicit CommonInputView(int* b, int* e) : begin_(b), end_(e) {}
- constexpr common_input_iterator<int*> begin() const { return common_input_iterator<int*>(begin_); }
- constexpr common_input_iterator<int*> end() const { return common_input_iterator<int*>(end_); }
+ constexpr Iter<int*> begin() const { return Iter<int*>(begin_); }
+ constexpr Iter<int*> end() const { return Iter<int*>(end_); }
- constexpr common_input_iterator<const int*> begin()
+ constexpr Iter<const int*> begin()
requires(!Simple)
{
- return common_input_iterator<const int*>(begin_);
+ return Iter<const int*>(begin_);
}
- constexpr common_input_iterator<const int*> end()
+ constexpr Iter<const int*> end()
requires(!Simple)
{
- return common_input_iterator<const int*>(end_);
+ return Iter<const int*>(end_);
+ }
+
+ constexpr auto size() const
+ requires Sized
+ {
+ return end_ - begin_;
}
private:
@@ -88,14 +94,25 @@ struct CommonInputView : std::ranges::view_base {
int* end_;
};
-using NonSimpleViewNonSized = CommonInputView<false>;
-static_assert(std::ranges::view<NonSimpleViewNonSized>);
-static_assert(!simple_view<NonSimpleViewNonSized>);
-static_assert(!std::ranges::sized_range<NonSimpleViewNonSized>);
+using NonSimpleNonSizedView = CommonInputView<common_input_iterator,false, false>;
+static_assert(std::ranges::view<NonSimpleNonSizedView>);
+static_assert(!simple_view<NonSimpleNonSizedView>);
+static_assert(!std::ranges::sized_range<NonSimpleNonSizedView>);
-using SimpleViewNonSized = CommonInputView<true>;
+using SimpleViewNonSized = CommonInputView<common_input_iterator,true, false>;
static_assert(std::ranges::view<SimpleViewNonSized>);
static_assert(simple_view<SimpleViewNonSized>);
static_assert(!std::ranges::sized_range<SimpleViewNonSized>);
+using NonSimpleSizedView = CommonInputView<common_input_iterator,false, true>;
+static_assert(std::ranges::view<NonSimpleSizedView>);
+static_assert(!simple_view<NonSimpleSizedView>);
+static_assert(std::ranges::sized_range<NonSimpleSizedView>);
+
+using NonSimpleSizedRandomView = CommonInputView<random_access_iterator,false, true>;
+static_assert(std::ranges::view<NonSimpleSizedRandomView>);
+static_assert(!simple_view<NonSimpleSizedRandomView>);
+static_assert(std::ranges::sized_range<NonSimpleSizedRandomView>);
+static_assert(std::ranges::random_access_range<NonSimpleSizedRandomView>);
+
#endif // TEST_STD_RANGES_RANGE_ADAPTORS_RANGE_TAKE_TYPES_H
>From 6e3227abdeceeac41ba80ef4c4c09170a306dd5d Mon Sep 17 00:00:00 2001
From: Will Hawkins <hawkinsw at obs.cr>
Date: Wed, 24 Jan 2024 21:56:00 -0500
Subject: [PATCH 5/5] fixup! [libc++][NFC] Check for take_view returning
different types depending on simple_view-ness
Formatting.
---
.../test/std/ranges/range.adaptors/range.take/types.h | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/libcxx/test/std/ranges/range.adaptors/range.take/types.h b/libcxx/test/std/ranges/range.adaptors/range.take/types.h
index 81b54b9fb2faff9..5148c9f72ff0d4c 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.take/types.h
+++ b/libcxx/test/std/ranges/range.adaptors/range.take/types.h
@@ -65,7 +65,7 @@ struct View : std::ranges::view_base {
int* end_;
};
-template <template <class ...> typename Iter, bool Simple, bool Sized>
+template <template <class...> typename Iter, bool Simple, bool Sized>
struct CommonInputView : std::ranges::view_base {
constexpr explicit CommonInputView(int* b, int* e) : begin_(b), end_(e) {}
@@ -94,22 +94,22 @@ struct CommonInputView : std::ranges::view_base {
int* end_;
};
-using NonSimpleNonSizedView = CommonInputView<common_input_iterator,false, false>;
+using NonSimpleNonSizedView = CommonInputView<common_input_iterator, false, false>;
static_assert(std::ranges::view<NonSimpleNonSizedView>);
static_assert(!simple_view<NonSimpleNonSizedView>);
static_assert(!std::ranges::sized_range<NonSimpleNonSizedView>);
-using SimpleViewNonSized = CommonInputView<common_input_iterator,true, false>;
+using SimpleViewNonSized = CommonInputView<common_input_iterator, true, false>;
static_assert(std::ranges::view<SimpleViewNonSized>);
static_assert(simple_view<SimpleViewNonSized>);
static_assert(!std::ranges::sized_range<SimpleViewNonSized>);
-using NonSimpleSizedView = CommonInputView<common_input_iterator,false, true>;
+using NonSimpleSizedView = CommonInputView<common_input_iterator, false, true>;
static_assert(std::ranges::view<NonSimpleSizedView>);
static_assert(!simple_view<NonSimpleSizedView>);
static_assert(std::ranges::sized_range<NonSimpleSizedView>);
-using NonSimpleSizedRandomView = CommonInputView<random_access_iterator,false, true>;
+using NonSimpleSizedRandomView = CommonInputView<random_access_iterator, false, true>;
static_assert(std::ranges::view<NonSimpleSizedRandomView>);
static_assert(!simple_view<NonSimpleSizedRandomView>);
static_assert(std::ranges::sized_range<NonSimpleSizedRandomView>);
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