On Sun, May 18, 2025 at 10:14 PM Luc Grosheintz <luc.groshei...@gmail.com>
wrote:
Implements a suite of tests for the currently implemented parts of
layout_left. The individual tests are templated over the layout type, to
allow reuse as more layouts are added.
libstdc++-v3/ChangeLog:
* testsuite/23_containers/mdspan/layouts/class_mandate_neg.cc: New
test.
* testsuite/23_containers/mdspan/layouts/ctors.cc: New test.
* testsuite/23_containers/mdspan/layouts/mapping.cc: New test.
Signed-off-by: Luc Grosheintz <luc.groshei...@gmail.com>
---
.../mdspan/layouts/class_mandate_neg.cc | 22 +
.../23_containers/mdspan/layouts/ctors.cc | 258 ++++++++++
.../23_containers/mdspan/layouts/mapping.cc | 445 ++++++++++++++++++
3 files changed, 725 insertions(+)
create mode 100644
libstdc++-v3/testsuite/23_containers/mdspan/layouts/class_mandate_neg.cc
create mode 100644
libstdc++-v3/testsuite/23_containers/mdspan/layouts/ctors.cc
create mode 100644
libstdc++-v3/testsuite/23_containers/mdspan/layouts/mapping.cc
diff --git
a/libstdc++-v3/testsuite/23_containers/mdspan/layouts/class_mandate_neg.cc
b/libstdc++-v3/testsuite/23_containers/mdspan/layouts/class_mandate_neg.cc
new file mode 100644
index 00000000000..f122541b3e8
--- /dev/null
+++
b/libstdc++-v3/testsuite/23_containers/mdspan/layouts/class_mandate_neg.cc
@@ -0,0 +1,22 @@
+// { dg-do compile { target c++23 } }
+#include<mdspan>
+
+#include <cstdint>
+
+constexpr size_t dyn = std::dynamic_extent;
+static constexpr size_t n = (size_t(1) << 7) - 1;
I would use numeric_limits_max<unit8_t> here.
+
+template<typename Layout>
+ struct A
+ {
+ typename Layout::mapping<std::extents<uint8_t>> m0;
+ typename Layout::mapping<std::extents<uint8_t, n, 2, dyn>> m1;
+ typename Layout::mapping<std::extents<uint8_t, n, 2, 0>> m2;
+
+ using extents_type = std::extents<uint8_t, n, 4>;
+ typename Layout::mapping<extents_type> m3; // { dg-error "required
from" }
+ };
+
+A<std::layout_left> a_left; // { dg-error "required
from" }
+
+// { dg-prune-output "must be representable as index_type" }
diff --git a/libstdc++-v3/testsuite/23_containers/mdspan/layouts/ctors.cc
b/libstdc++-v3/testsuite/23_containers/mdspan/layouts/ctors.cc
new file mode 100644
index 00000000000..4592a05dec8
--- /dev/null
+++ b/libstdc++-v3/testsuite/23_containers/mdspan/layouts/ctors.cc
@@ -0,0 +1,258 @@
+// { dg-do run { target c++23 } }
+#include <mdspan>
+
+#include <testsuite_hooks.h>
+
+constexpr size_t dyn = std::dynamic_extent;
+
+template<typename Mapping, typename OExtents>
+ constexpr void
+ verify_from_exts(OExtents exts)
+ {
+ auto m = Mapping(exts);
+ VERIFY(m.extents() == exts);
+ }
+
+
+template<typename SMapping, typename OMapping>
+ constexpr void
+ verify_from_mapping(OMapping other)
+ {
+ auto m = SMapping(other);
+ VERIFY(m.extents() == other.extents());
+ }
+
+template<typename Mapping, typename OExtents>
+ requires (std::__mdspan::__is_extents<OExtents>)
+ constexpr void
+ verify(OExtents oexts)
+ {
In general, wen possible we prefer to not use internal details in tests.
I would use if constexpr with requires { typename Other::layout_type; }, ie.
template<typename Mapping, typename Source>
cosntexpr void
verify(Source const& src)
{
if constexpr (requires { typename Other::layout_type; })
verify_from_mapping(src)
else
verify_from_extents(src);
}
+ auto m = Mapping(oexts);
+ VERIFY(m.extents() == oexts);
+ }
+
+template<typename Mapping, typename OMapping>
+ requires (std::__mdspan::__standardized_mapping<OMapping>)
+ constexpr void
+ verify(OMapping other)
+ {
+ constexpr auto rank = Mapping::extents_type::rank();
+ auto m = Mapping(other);
+ VERIFY(m.extents() == other.extents());
+ if constexpr (rank > 0)
+ for(size_t i = 0; i < rank; ++i)
+ VERIFY(std::cmp_equal(m.stride(i), other.stride(i)));
Why is this not checked in verify_from_mapping?
+ }
+
+
+template<typename To, typename From>
+ constexpr void
+ verify_nothrow_convertible(From from)
+ {
+ static_assert(std::is_nothrow_constructible_v<To, From>);
I would call `verify_convertible` here, instead of these two lines.
+ static_assert(std::is_convertible_v<From, To>);
+ verify<To>(from);
+ }
+
+template<typename To, typename From>
+ constexpr void
+ verify_convertible(From from)
+ {
+ static_assert(std::is_convertible_v<From, To>);
+ verify<To>(from);
+ }
+
+template<typename To, typename From>
+ constexpr void
+ verify_constructible(From from)
+ {
+ static_assert(!std::is_convertible_v<From, To>);
+ static_assert(!std::is_nothrow_constructible_v<To, From>);
Implementations are allowed to add noexcept on the functions, so I would
not perform this checks.
See: https://eel.is/c++draft/res.on.exception.handling#5
+ static_assert(std::is_constructible_v<To, From>);
+ verify<To>(from);
+ }
+
+template<typename To, typename From>
+ constexpr void
+ verify_nothrow_constructible(From from)
+ {
+ static_assert(!std::is_convertible_v<From, To>);
+ static_assert(std::is_nothrow_constructible_v<To, From>);
With the change above, I would call verify verify_constructible.
+ verify<To>(from);
+ }
+
+template<typename Mapping, typename OExtents>
+ constexpr void
+ assert_not_constructible()
+ {
+ static_assert(!std::is_constructible_v<Mapping, OExtents>);
+ }
+
+// ctor: mapping(const extents&)
+namespace from_extents
+{
+ template<typename Layout, typename Extents, typename OExtents>
+ constexpr void
+ verify_nothrow_convertible(OExtents oexts)
+ {
+ using Mapping = typename Layout::mapping<Extents>;
+ ::verify_nothrow_convertible<Mapping>(oexts);
+ }
+
+ template<typename Layout, typename Extents, typename OExtents>
+ constexpr void
+ verify_nothrow_constructible(OExtents oexts)
+ {
+ using Mapping = typename Layout::mapping<Extents>;
+ ::verify_nothrow_constructible<Mapping>(oexts);
+ }
+
+ template<typename Layout, typename Extents, typename OExtents>
+ constexpr void
+ assert_not_constructible()
+ {
+ using Mapping = typename Layout::mapping<Extents>;
+ ::assert_not_constructible<Mapping, OExtents>();
+ }
+
+ template<typename Layout>
+ constexpr bool
+ test_ctor()
+ {
+ verify_nothrow_convertible<Layout, std::extents<int>>(
+ std::extents<int>{});
+
+ verify_nothrow_convertible<Layout, std::extents<int, 2>>(
+ std::extents<int, 2>{});
+
+ verify_nothrow_convertible<Layout, std::extents<int, dyn, 3>>(
+ std::extents<int, dyn, 3>{2});
+
+ verify_nothrow_constructible<Layout, std::extents<unsigned int>>(
+ std::extents<int>{});
+
+ verify_nothrow_constructible<Layout, std::extents<int, dyn>>(
+ std::extents<int, 2>{});
+
+ verify_nothrow_constructible<Layout, std::extents<int, dyn, 3>>(
+ std::extents<int, 2, 3>{});
+
+ assert_not_constructible<Layout, std::extents<int>,
+ std::extents<unsigned int>>();
+ assert_not_constructible<Layout, std::extents<int, 2>,
+ std::extents<int, dyn>>();
+ assert_not_constructible<Layout, std::extents<int, 2, 3>,
+ std::extents<int, dyn, 3>>();
+ return true;
+ }
+
+ template<typename Layout, typename Extents>
+ constexpr void
+ assert_deducible(Extents exts)
+ {
+ typename Layout::mapping m(exts);
+ static_assert(std::same_as<decltype(m),
+ typename Layout::mapping<Extents>>);
+ }
+
+ template<typename Layout>
+ constexpr void
+ test_deducible()
+ {
+ assert_deducible<Layout>(std::extents<int>());
+ assert_deducible<Layout>(std::extents<int, 1>());
+ assert_deducible<Layout>(std::extents<int, 1, 2, dyn>(3));
+ }
+
+ template<typename Layout>
+ constexpr void
+ test_all()
+ {
+ test_ctor<Layout>();
+ static_assert(test_ctor<Layout>());
+ test_deducible<Layout>();
+ }
+}
+
+// ctor: mapping(mapping<OExtents>)
+namespace from_same_layout
+{
+ template<typename Layout, typename Extents, typename OExtents>
+ constexpr void
+ verify_nothrow_convertible(OExtents exts)
+ {
+ using Mapping = typename Layout::mapping<Extents>;
+ using OMapping = typename Layout::mapping<OExtents>;
+
+ ::verify_nothrow_convertible<Mapping>(OMapping(exts));
+ }
+
+ template<typename Layout, typename Extents, typename OExtents>
+ constexpr void
+ verify_nothrow_constructible(OExtents exts)
+ {
+ using Mapping = typename Layout::mapping<Extents>;
+ using OMapping = typename Layout::mapping<OExtents>;
+
+ ::verify_nothrow_constructible<Mapping>(OMapping(exts));
+ }
+
+ template<typename Layout>
+ constexpr bool
+ test_ctor()
+ {
+ verify_nothrow_convertible<Layout, std::extents<unsigned int>>(
+ std::extents<int>{});
+
+ verify_nothrow_constructible<Layout, std::extents<int>>(
+ std::extents<unsigned int>{});
+
+ assert_not_constructible<
+ typename Layout::mapping<std::extents<int>>,
+ typename Layout::mapping<std::extents<int, 1>>>();
+
+ assert_not_constructible<
+ typename Layout::mapping<std::extents<int, 1>>,
+ typename Layout::mapping<std::extents<int>>>();
+
+ verify_nothrow_constructible<Layout, std::extents<int, 1>>(
+ std::extents<int, dyn>{1});
+
+ verify_nothrow_convertible<Layout, std::extents<int, dyn>>(
+ std::extents<int, 1>{});
+
+ assert_not_constructible<
+ typename Layout::mapping<std::extents<int, 1, 2>>,
+ typename Layout::mapping<std::extents<int, 1>>>();
+
+ verify_nothrow_constructible<Layout, std::extents<int, 1, 2>>(
+ std::extents<int, dyn, 2>{1});
+
+ verify_nothrow_convertible<Layout, std::extents<int, dyn, 2>>(
+ std::extents<int, 1, 2>{});
+ return true;
+ }
+
+ template<typename Layout>
+ constexpr void
+ test_all()
+ {
+ test_ctor<Layout>();
+ static_assert(test_ctor<Layout>());
+ }
+}
+
+template<typename Layout>
+ constexpr void
+ test_all()
+ {
+ from_extents::test_all<Layout>();
+ from_same_layout::test_all<Layout>();
+ }
+
+int
+main()
+{
+ test_all<std::layout_left>();
+ return 0;
+}
diff --git
a/libstdc++-v3/testsuite/23_containers/mdspan/layouts/mapping.cc
b/libstdc++-v3/testsuite/23_containers/mdspan/layouts/mapping.cc
new file mode 100644
index 00000000000..18f3548df67
--- /dev/null
+++ b/libstdc++-v3/testsuite/23_containers/mdspan/layouts/mapping.cc
@@ -0,0 +1,445 @@
+// { dg-do run { target c++23 } }
+#include <mdspan>
+
+#include <cstdint>
+#include <testsuite_hooks.h>
+
+constexpr size_t dyn = std::dynamic_extent;
+
+template<typename Layout, typename Extents>
+ constexpr bool
+ test_mapping_properties()
+ {
+ using M = typename Layout::mapping<Extents>;
+ static_assert(std::__mdspan::__is_extents<typename M::extents_type>);
+ static_assert(std::copyable<M>);
+ static_assert(std::is_nothrow_move_constructible_v<M>);
+ static_assert(std::is_nothrow_move_assignable_v<M>);
+ static_assert(std::is_nothrow_swappable_v<M>);
+ static_assert(std::is_same_v<typename M::extents_type, Extents>);
+ static_assert(std::is_same_v<typename M::index_type,
+ typename M::extents_type::index_type>);
+ static_assert(std::is_same_v<typename M::size_type,
+ typename M::extents_type::size_type>);
+ static_assert(std::is_same_v<typename M::rank_type,
+ typename M::extents_type::rank_type>);
+ static_assert(std::is_same_v<typename M::layout_type, Layout>);
+
+ static_assert(std::is_trivially_copyable_v<M>);
+ static_assert(std::regular<M>);
+
+ static_assert(M::is_always_unique() && M::is_unique());
+ static_assert(M::is_always_strided() && M::is_strided());
+ return true;
+ }
+
+template<typename Layout>
+ constexpr bool
+ test_mapping_properties_all()
+ {
+ test_mapping_properties<Layout, std::extents<int>>();
+ test_mapping_properties<Layout, std::extents<int, 1>>();
+ test_mapping_properties<Layout, std::extents<int, dyn>>();
+ test_mapping_properties<Layout, std::extents<int, dyn, dyn>>();
+ return true;
+ }
+
+// Check operator()(Indices...)
+template<typename Mapping, size_t N>
+ constexpr typename Mapping::index_type
+ linear_index(const Mapping& mapping,
+ const std::array<typename Mapping::index_type, N>& indices)
+ {
+ typename Mapping::index_type ret = 0;
+ for(size_t r = 0; r < indices.size(); ++r)
+ ret += indices[r] * mapping.stride(r);
+ return ret;
+ }
+
+template<typename Mapping, typename... Indices>
+ constexpr void
+ test_linear_index(const Mapping& m, Indices... i)
+ {
+ using index_type = typename Mapping::index_type;
+ index_type expected = linear_index(m, std::array{index_type(i)...});
+ VERIFY(m(i...) == expected);
+ VERIFY(m(uint8_t(i)...) == expected);
+ }
+
+template<typename Layout>
+ constexpr void
+ test_linear_index_0d()
+ {
+ constexpr typename Layout::mapping<std::extents<int>> m;
+ VERIFY(m() == 0);
+ }
+
+template<typename Layout>
+ constexpr void
+ test_linear_index_1d()
+ {
+ typename Layout::mapping<std::extents<int, 5>> m;
+ test_linear_index(m, 0);
+ test_linear_index(m, 1);
+ test_linear_index(m, 4);
+ }
+
+template<typename Layout>
+ constexpr void
+ test_linear_index_2d()
+ {
+ typename Layout::mapping<std::extents<int, 3, 256>> m;
+ test_linear_index(m, 0, 0);
+ test_linear_index(m, 1, 0);
+ test_linear_index(m, 0, 1);
+ test_linear_index(m, 1, 1);
+ test_linear_index(m, 2, 4);
+ }
+
+
+template<typename Layout>
+ struct MappingFactory
+ {
+ template<typename Extents>
+ static constexpr typename Layout::mapping<Extents>
+ create(Extents exts)
+ { return exts; }
This call to this function be replaced with:
typename Layout::mapping<Extents> m(std::extents(3, 5, 7));
I think expressing this directly would help.
+ };
+
+template<typename Layout>
+ constexpr void
+ test_linear_index_3d()
+ {
+ auto m = MappingFactory<Layout>::create(std::extents(3, 5, 7));
+ test_linear_index(m, 0, 0, 0);
+ test_linear_index(m, 1, 0, 0);
+ test_linear_index(m, 0, 1, 0);
+ test_linear_index(m, 0, 0, 1);
+ test_linear_index(m, 1, 1, 0);
+ test_linear_index(m, 2, 4, 6);
+ }
+
+struct IntLikeA
+{
+ operator int()
+ { return 0; }
+};
+
+struct IntLikeB
+{
+ operator int() noexcept
+ { return 0; }
+};
+
+struct NotIntLike
+{ };
+
+template<typename Layout>
+ constexpr void
+ test_has_linear_index_0d()
+ {
+ using Mapping = typename Layout::mapping<std::extents<int>>;
+ static_assert(std::invocable<Mapping>);
+ static_assert(!std::invocable<Mapping, int>);
+ static_assert(!std::invocable<Mapping, IntLikeA>);
+ static_assert(!std::invocable<Mapping, IntLikeB>);
+ static_assert(!std::invocable<Mapping, NotIntLike>);
+ }
+
+template<typename Layout>
+ constexpr void
+ test_has_linear_index_1d()
+ {
+ using Mapping = typename Layout::mapping<std::extents<int, 3>>;
+ static_assert(std::invocable<Mapping, int>);
+ static_assert(!std::invocable<Mapping>);
+ static_assert(!std::invocable<Mapping, IntLikeA>);
+ static_assert(std::invocable<Mapping, IntLikeB>);
+ static_assert(!std::invocable<Mapping, NotIntLike>);
+ static_assert(std::invocable<Mapping, double>);
+ }
+
+template<typename Layout>
+ constexpr void
+ test_has_linear_index_2d()
+ {
+ using Mapping = typename Layout::mapping<std::extents<int, 3, 5>>;
+ static_assert(std::invocable<Mapping, int, int>);
+ static_assert(!std::invocable<Mapping, int>);
+ static_assert(!std::invocable<Mapping, IntLikeA, int>);
+ static_assert(std::invocable<Mapping, IntLikeB, int>);
+ static_assert(!std::invocable<Mapping, NotIntLike, int>);
+ static_assert(std::invocable<Mapping, double, double>);
+ }
+
+template<typename Layout>
+ constexpr bool
+ test_linear_index_all()
+ {
+ test_linear_index_0d<Layout>();
+ test_linear_index_1d<Layout>();
+ test_linear_index_2d<Layout>();
+ test_linear_index_3d<Layout>();
+ test_has_linear_index_0d<Layout>();
+ test_has_linear_index_1d<Layout>();
+ test_has_linear_index_2d<Layout>();
+ return true;
+ }
+
+template<typename Mapping, typename Mapping::index_type... Counts>
+ constexpr typename Mapping::index_type
+ linear_index_end_impl(Mapping m,
+ std::integer_sequence<typename Mapping::index_type, Counts...>)
I would define this as local lambda inside linear_index_end:
auto __impl = [&m]<typename Mapping::index_type... Counts>
{
// code you have here.
}
return _impl(make_index_sequence(...);
+ {
+ if constexpr (sizeof...(Counts) == 0)
I do not think you need this special case, it fails from the specification
below.
as m((exts.extent(Counts) - 1)...) + 1 becomes m() + 1.
+ return 1;
+ else
+ {
+ auto exts = m.extents();
+ if(((exts.extent(Counts) == 0) || ...))
+ return 0;
+ return m((exts.extent(Counts) - 1)...) + 1;
+ }
+ }
+
+template<typename Mapping>
+ constexpr typename Mapping::index_type
+ linear_index_end(Mapping m)
+ {
+ using index_type = typename Mapping::index_type;
+ constexpr size_t rank = Mapping::extents_type::rank();
+ return linear_index_end_impl(m,
+ std::make_integer_sequence<index_type, rank>());
+ }
+
+// Check required_span_size
+template<typename Mapping>
+ constexpr void
+ test_required_span_size(Mapping m)
+ { VERIFY(m.required_span_size() == linear_index_end(m)); }
+
+template<typename Layout>
+ constexpr void
+ test_required_span_size_0d()
+ {
+ typename Layout::mapping<std::extents<int>> m;
+ test_required_span_size(m);
+ }
+
+template<typename Layout>
+ constexpr void
+ test_required_span_size_1d()
+ {
+ auto m = MappingFactory<Layout>::create(std::extents(3));
+ test_required_span_size(m);
+ }
+
+template<typename Layout>
+ constexpr void
+ test_required_span_size_2d()
+ {
+ auto m = MappingFactory<Layout>::create(std::extents(3, 5));
+ test_required_span_size(m);
+ }
+
+template<typename Layout>
+ constexpr void
+ test_required_span_size_3d()
+ {
+ auto m = MappingFactory<Layout>::create(std::extents(3, 5, 7));
+ test_required_span_size(m);
+ }
+
+template<typename Layout>
+ constexpr void
+ test_required_span_size_zero_1d()
+ {
+ auto m = MappingFactory<Layout>::create(std::extents(3, 0));
+ test_required_span_size(m);
+ }
+
+template<typename Layout>
+ constexpr void
+ test_required_span_size_zero_3d()
+ {
+ auto m = MappingFactory<Layout>::create(std::extents(3, 0, 7));
+ test_required_span_size(m);
+ }
+
+template<typename Layout>
+ constexpr bool
+ test_required_span_size_all()
+ {
+ test_required_span_size_0d<Layout>();
+ test_required_span_size_1d<Layout>();
+ test_required_span_size_2d<Layout>();
+ test_required_span_size_3d<Layout>();
+ test_required_span_size_zero_1d<Layout>();
+ test_required_span_size_zero_3d<Layout>();
+ return true;
+ }
+
+// Check stride
+template<typename Layout>
+ constexpr void
+ test_stride_1d()
+ {
+ std::layout_left::mapping<std::extents<int, 3>> m;
+ VERIFY(m.stride(0) == 1);
+ }
+
+template<typename Layout>
+ constexpr void
+ test_stride_2d();
+
+template<>
+ constexpr void
+ test_stride_2d<std::layout_left>()
+ {
+ std::layout_left::mapping<std::extents<int, 3, 5>> m;
+ VERIFY(m.stride(0) == 1);
+ VERIFY(m.stride(1) == 3);
+ }
+
+template<typename Layout>
+ constexpr void
+ test_stride_3d();
+
+template<>
+ constexpr void
+ test_stride_3d<std::layout_left>()
+ {
+ std::layout_left::mapping m(std::dextents<int, 3>(3, 5, 7));
+ VERIFY(m.stride(0) == 1);
+ VERIFY(m.stride(1) == 3);
+ VERIFY(m.stride(2) == 3*5);
+ }
+
+template<typename Layout>
+ constexpr bool
+ test_stride_all()
+ {
+ test_stride_1d<Layout>();
+ test_stride_2d<Layout>();
+ test_stride_3d<Layout>();
+ return true;
+ }
+
+template<typename Mapping>
+ concept has_stride = requires (Mapping m)
+ {
+ { m.stride(0) } -> std::same_as<typename Mapping::index_type>;
+ };
+
+template<typename Layout>
+ constexpr void
+ test_has_stride_0d()
+ {
+ using Mapping = typename Layout::mapping<std::extents<int>>;
+ constexpr bool expected = false;
+ static_assert(has_stride<Mapping> == expected);
+ }
+
+template<typename Layout>
+ constexpr void
+ test_has_stride_1d()
+ { static_assert(has_stride<typename Layout::mapping<std::extents<int,
1>>>); }
+
+template<typename Layout>
+ constexpr void
+ test_has_stride_2d()
+ {
+ using Extents = std::extents<int, 1, 2>;
+ static_assert(has_stride<typename Layout::mapping<Extents>>);
+ }
+
+// Check operator==
+template<typename Layout>
+ constexpr void
+ test_eq()
+ {
+ typename Layout::mapping<std::extents<int, 1, 2>> m1;
+ typename Layout::mapping<std::extents<int, 2, 2>> m2;
+ typename Layout::mapping<std::dextents<int, 2>> m3(m1);
+
+ VERIFY(m1 == m1);
+ VERIFY(m1 != m2);
+ VERIFY(m1 == m3);
+ VERIFY(m2 != m3);
+ }
+
+template<typename Layout>
+ constexpr void
+ test_eq_zero()
+ {
+ typename Layout::mapping<std::extents<int, 0, 2>> m1;
+ typename Layout::mapping<std::extents<int, 0, 2>> m2;
+ typename Layout::mapping<std::extents<int, 2, 0>> m3;
+
+ VERIFY(m1 == m2);
+ VERIFY(m1 != m3);
+ }
+
+template<typename M1, typename M2>
+ concept has_op_eq = requires (M1 m1, M2 m2)
+ {
+ { m1 == m2 } -> std::same_as<bool>;
+ { m2 == m1 } -> std::same_as<bool>;
+ { m1 != m2 } -> std::same_as<bool>;
+ { m2 != m1 } -> std::same_as<bool>;
+ };
+
+template<typename Layout>
+ constexpr bool
+ test_has_op_eq()
+ {
+ static_assert(!has_op_eq<
+ typename Layout::mapping<std::extents<int, 1, 2>>,
+ typename Layout::mapping<std::extents<int, 1>>>);
+
+ static_assert(has_op_eq<
+ typename Layout::mapping<std::extents<int, 1>>,
+ typename Layout::mapping<std::extents<int, 1>>>);
+
+ static_assert(has_op_eq<
+ typename Layout::mapping<std::extents<int, 1>>,
+ typename Layout::mapping<std::extents<int, 2>>>);
+ return true;
+ }
+
+template<typename Layout>
+ constexpr bool
+ test_mapping_all()
+ {
+ test_linear_index_all<Layout>();
+ test_required_span_size_all<Layout>();
+ test_stride_all<Layout>();
+
+ test_eq<Layout>();
+ test_eq_zero<Layout>();
+ return true;
+ }
+
+template<typename Layout>
+ constexpr void
+ test_all()
+ {
+ static_assert(std::is_trivially_default_constructible_v<Layout>);
+ static_assert(std::is_trivially_copyable_v<Layout>);
+ static_assert(test_mapping_properties_all<Layout>());
+
+ test_mapping_all<Layout>();
+ static_assert(test_mapping_all<Layout>());
+
+ test_has_stride_0d<Layout>();
+ test_has_stride_1d<Layout>();
+ test_has_stride_2d<Layout>();
+ test_has_op_eq<Layout>();
+ }
+
+int
+main()
+{
+ test_all<std::layout_left>();
+ return 0;
+}
--
2.49.0
