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[libc++][ranges] implement std::ranges::zip_transform_view #79605

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Merged
huixie90 merged 27 commits into from
Jul 20, 2025
Merged

[libc++][ranges] implement std::ranges::zip_transform_view #79605

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[libc++][ranges] implement `std::ranges::zip_transform_view`
huixie90 Jan 26, 2024
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add tests
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complete some lwg issues
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Update libcxx/docs/Status/Cxx23Issues.csv
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Update libcxx/test/std/ranges/range.adaptors/range.zip.transform/ctad…
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Update libcxx/test/std/ranges/range.adaptors/range.zip.transform/types.h
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LWG
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@huixie90
huixie90 committed Jul 19, 2025
commit 9a5c4ee2306db62071360ca8b5afffb898ef4bd9
2 changes: 1 addition & 1 deletion libcxx/docs/Status/Cxx23Issues.csv
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Expand Up @@ -222,7 +222,7 @@
"`LWG3765 <https://wg21.link/LWG3765>`__","``const_sentinel`` should be constrained","2022-11 (Kona)","","",""
"`LWG3766 <https://wg21.link/LWG3766>`__","``view_interface::cbegin`` is underconstrained","2022-11 (Kona)","","",""
"`LWG3770 <https://wg21.link/LWG3770>`__","``const_sentinel_t`` is missing","2022-11 (Kona)","","",""
"`LWG3773 <https://wg21.link/LWG3773>`__","``views::zip_transform`` still requires ``F`` to be ``copy_constructible`` when empty pack","2022-11 (Kona)","","",""
"`LWG3773 <https://wg21.link/LWG3773>`__","``views::zip_transform`` still requires ``F`` to be ``copy_constructible`` when empty pack","2022-11 (Kona)","|Complete|","21",""
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"`LWG3774 <https://wg21.link/LWG3774>`__","``<flat_set>`` should include ``<compare>``","2022-11 (Kona)","","",""
"`LWG3775 <https://wg21.link/LWG3775>`__","Broken dependencies in the ``Cpp17Allocator`` requirements","2022-11 (Kona)","","",""
"`LWG3778 <https://wg21.link/LWG3778>`__","``vector<bool>`` missing exception specifications","2022-11 (Kona)","|Complete|","3.7",""
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10 changes: 10 additions & 0 deletions libcxx/test/std/ranges/range.adaptors/range.zip.transform/cpo.pass.cpp
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Expand Up @@ -24,6 +24,13 @@ struct NotMoveConstructible {
int operator()() const { return 5; }
};

struct NotCopyConstructible {
NotCopyConstructible() = default;
NotCopyConstructible(NotCopyConstructible&&) = default;
NotCopyConstructible(const NotCopyConstructible&) = delete;
int operator()() const { return 5; }
};

struct NotInvocable {};

template <class... Args>
Expand All @@ -35,6 +42,9 @@ struct ReturnNotObject {
void operator()() const {}
};

// LWG3773 views::zip_transform still requires F to be copy_constructible when empty pack
static_assert(std::is_invocable_v<decltype((std::views::zip_transform)), NotCopyConstructible>);

static_assert(!std::is_invocable_v<decltype((std::views::zip_transform))>);
static_assert(!std::is_invocable_v<decltype((std::views::zip_transform)), NotMoveConstructible>);
static_assert(!std::is_invocable_v<decltype((std::views::zip_transform)), NotInvocable>);
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