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

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huixie90 merged 27 commits into from
Jul 20, 2025
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[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/docs/Status/Cxx23Issues.csv
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Update libcxx/test/std/ranges/range.adaptors/range.zip.transform/types.h
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complete some lwg issues
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@huixie90
huixie90 committed Jul 19, 2025
commit 2c6e763079e0e3415e395f64e407de7209eba361
4 changes: 2 additions & 2 deletions libcxx/docs/Status/Cxx23Issues.csv
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Original file line number Diff line number Diff line change
Expand Up @@ -170,7 +170,7 @@
"`LWG3687 <https://wg21.link/LWG3687>`__","``expected<cv void, E>`` move constructor should move","2022-07 (Virtual)","|Complete|","16",""
"`LWG3692 <https://wg21.link/LWG3692>`__","``zip_view::iterator``'s ``operator<=>`` is overconstrained","2022-07 (Virtual)","|Complete|","20",""
"`LWG3701 <https://wg21.link/LWG3701>`__","Make ``formatter<remove_cvref_t<const charT[N]>, charT>`` requirement explicit","2022-07 (Virtual)","|Complete|","15",""
"`LWG3702 <https://wg21.link/LWG3702>`__","Should ``zip_transform_view::iterator`` remove ``operator<``","2022-07 (Virtual)","","",""
"`LWG3702 <https://wg21.link/LWG3702>`__","Should ``zip_transform_view::iterator`` remove ``operator<``","2022-07 (Virtual)","|Complete|","21",""
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"`LWG3703 <https://wg21.link/LWG3703>`__","Missing requirements for ``expected<T, E>`` requires ``is_void<T>``","2022-07 (Virtual)","|Complete|","16",""
"`LWG3704 <https://wg21.link/LWG3704>`__","LWG 2059 added overloads that might be ill-formed for sets","2022-07 (Virtual)","","",""
"`LWG3705 <https://wg21.link/LWG3705>`__","Hashability shouldn't depend on basic_string's allocator","2022-07 (Virtual)","|Complete|","16",""
Expand Down Expand Up @@ -234,7 +234,7 @@
"`LWG3792 <https://wg21.link/LWG3792>`__","``__cpp_lib_constexpr_algorithms`` should also be defined in ``<utility>``","2022-11 (Kona)","|Complete|","16",""
"`LWG3795 <https://wg21.link/LWG3795>`__","Self-move-assignment of ``std::future`` and ``std::shared_future`` have unimplementable postconditions","2022-11 (Kona)","","",""
"`LWG3796 <https://wg21.link/LWG3796>`__","``movable-box`` as member should use ``default-initialization`` instead of ``copy-initialization``","2022-11 (Kona)","","",""
"`LWG3798 <https://wg21.link/LWG3798>`__","Rvalue reference and ``iterator_category``","2022-11 (Kona)","|Partial|","","``join_with_view``, ``zip_transform_view``, and ``adjacent_transform_view`` haven't been done yet since these types aren't implemented yet"
"`LWG3798 <https://wg21.link/LWG3798>`__","Rvalue reference and ``iterator_category``","2022-11 (Kona)","|Partial|","","``join_with_view``, and ``adjacent_transform_view`` haven't been done yet since these types aren't implemented yet"
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"`LWG3801 <https://wg21.link/LWG3801>`__","``cartesian_product_view::iterator::distance-from`` ignores the size of last underlying range","2022-11 (Kona)","","",""
"`LWG3814 <https://wg21.link/LWG3814>`__","Add freestanding items requested by NB comments","2022-11 (Kona)","","",""
"`LWG3816 <https://wg21.link/LWG3816>`__","``flat_map`` and ``flat_multimap`` should impose sequence container requirements","2022-11 (Kona)","","",""
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11 changes: 11 additions & 0 deletions ...test/std/ranges/range.adaptors/range.zip.transform/iterator/member_types.compile.pass.cpp
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Expand Up @@ -41,6 +41,10 @@ struct DiffTypeRange {
struct Foo {};
struct Bar {};

struct RValueRefFn {
int&& operator()(auto&&...) const;
};

void test() {
int buffer[] = {1, 2, 3, 4};
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{
Expand Down Expand Up @@ -155,4 +159,11 @@ void test() {
using Iter = decltype(v.begin());
static_assert(std::is_same_v<Iter::value_type, std::tuple<Foo, Bar>>);
}

// LWG3798 Rvalue reference and iterator_category
{
std::ranges::zip_transform_view v(RValueRefFn{}, buffer);
using Iter = decltype(v.begin());
static_assert(std::is_same_v<Iter::iterator_category, std::random_access_iterator_tag>);
}
}