[libcxx-commits] [libcxx] [libc++][docs] Avoid talking about other implementations on DR status (PR #210637)

Sun Jul 19 20:17:18 PDT 2026

llvmorg-github-actions[bot] wrote:




@llvm/pr-subscribers-libcxx

Author: A. Jiang (frederick-vs-ja)

<details>
<summary>Changes</summary>

Standard library implementations consistently treat (or will consistently treat) some LWG papers as Defect Reports that are also applied to old modes, despite that they are not officially listed as Defect Reports in WG21 meeting minutes. We used to say "other implementations (namely MSVC STL and libstdc++) will do the same" for some of them.

However, such sentences will become outdated soon when other implementations actually do so. It is possibly better to avoid saying so, which potentially requires synchronizing our documentation with other implementations.

---
Full diff: https://github.com/llvm/llvm-project/pull/210637.diff


4 Files Affected:

- (modified) libcxx/docs/Status/Cxx17Papers.csv (+1-1) 
- (modified) libcxx/docs/Status/Cxx23Papers.csv (+2-2) 
- (modified) libcxx/docs/Status/Cxx26Issues.csv (+1-1) 
- (modified) libcxx/docs/Status/Cxx26Papers.csv (+3-3) 


``````````diff

diff --git a/libcxx/docs/Status/Cxx17Papers.csv b/libcxx/docs/Status/Cxx17Papers.csv
index ba2ceeedc2ce8..58db91a94c9a9 100644
--- a/libcxx/docs/Status/Cxx17Papers.csv
+++ b/libcxx/docs/Status/Cxx17Papers.csv
@@ -84,7 +84,7 @@
 "`P0508R0 <https://wg21.link/P0508R0>`__","Wording for GB 58 - structured bindings for node_handles","2016-11 (Issaquah)","|Complete|","7","`#99944 <https://github.com/llvm/llvm-project/issues/99944>`__",""
 "`P0509R1 <https://wg21.link/P0509R1>`__","Updating ""Restrictions on exception handling""","2016-11 (Issaquah)","|Nothing To Do|","n/a","`#103676 <https://github.com/llvm/llvm-project/issues/103676>`__",""
 "`P0510R0 <https://wg21.link/P0510R0>`__","Disallowing references, incomplete types, arrays, and empty variants","2016-11 (Issaquah)","|Complete|","4","`#103677 <https://github.com/llvm/llvm-project/issues/103677>`__",""
-"`P0513R0 <https://wg21.link/P0513R0>`__","Poisoning the Hash","2016-11 (Issaquah)","|Complete|","5","`#103678 <https://github.com/llvm/llvm-project/issues/103678>`__","Implemented as a DR against C++11 since LLVM 22. MSVC STL does the same."
+"`P0513R0 <https://wg21.link/P0513R0>`__","Poisoning the Hash","2016-11 (Issaquah)","|Complete|","5","`#103678 <https://github.com/llvm/llvm-project/issues/103678>`__","Implemented as a DR against C++11 since LLVM 22."
 "`P0516R0 <https://wg21.link/P0516R0>`__","Clarify That shared_future's Copy Operations have Wide Contracts","2016-11 (Issaquah)","|Complete|","4","`#103679 <https://github.com/llvm/llvm-project/issues/103679>`__",""
 "`P0517R0 <https://wg21.link/P0517R0>`__","Make future_error Constructible","2016-11 (Issaquah)","|Complete|","4","`#103680 <https://github.com/llvm/llvm-project/issues/103680>`__",""
 "`P0521R0 <https://wg21.link/P0521R0>`__","Proposed Resolution for CA 14 (shared_ptr use_count/unique)","2016-11 (Issaquah)","|Complete|","18","`#103681 <https://github.com/llvm/llvm-project/issues/103681>`__",""
diff --git a/libcxx/docs/Status/Cxx23Papers.csv b/libcxx/docs/Status/Cxx23Papers.csv
index 739f0ecab37e7..0c608bd2bc1da 100644
--- a/libcxx/docs/Status/Cxx23Papers.csv
+++ b/libcxx/docs/Status/Cxx23Papers.csv
@@ -95,7 +95,7 @@
 "`P1202R5 <https://wg21.link/P1202R5>`__","Asymmetric Fences","2022-11 (Kona)","","","`#105238 <https://github.com/llvm/llvm-project/issues/105238>`__",""
 "`P1264R2 <https://wg21.link/P1264R2>`__","Revising the wording of ``stream`` input operations","2022-11 (Kona)","|Complete|","9","`#105239 <https://github.com/llvm/llvm-project/issues/105239>`__",""
 "`P1478R8 <https://wg21.link/P1478R8>`__","``Byte-wise`` ``atomic`` ``memcpy``","2022-11 (Kona)","","","`#105240 <https://github.com/llvm/llvm-project/issues/105240>`__",""
-"`P2167R3 <https://wg21.link/P2167R3>`__","Improved Proposed Wording for LWG 2114","2022-11 (Kona)","|Complete|","20","`#105241 <https://github.com/llvm/llvm-project/issues/105241>`__","The `[cmp.alg] <https://eel.is/c++draft/cmp.alg>`__ part is implemented as a DR against C++20. MSVC STL does the same. Other parts are Nothing To Do."
+"`P2167R3 <https://wg21.link/P2167R3>`__","Improved Proposed Wording for LWG 2114","2022-11 (Kona)","|Complete|","20","`#105241 <https://github.com/llvm/llvm-project/issues/105241>`__","The `[cmp.alg] <https://eel.is/c++draft/cmp.alg>`__ part is implemented as a DR against C++20."
 "`P2396R1 <https://wg21.link/P2396R1>`__","Concurrency TS 2 fixes ","2022-11 (Kona)","","","`#105242 <https://github.com/llvm/llvm-project/issues/105242>`__",""
 "`P2505R5 <https://wg21.link/P2505R5>`__","Monadic Functions for ``std::expected``","2022-11 (Kona)","|Complete|","17","`#105243 <https://github.com/llvm/llvm-project/issues/105243>`__",""
 "`P2539R4 <https://wg21.link/P2539R4>`__","Should the output of ``std::print`` to a terminal be synchronized with the underlying stream?","2022-11 (Kona)","|Complete|","18","`#105245 <https://github.com/llvm/llvm-project/issues/105245>`__",""
@@ -106,7 +106,7 @@
 "`P2770R0 <https://wg21.link/P2770R0>`__","Stashing stashing ``iterators`` for proper flattening","2023-02 (Issaquah)","|Complete|","21","`#105250 <https://github.com/llvm/llvm-project/issues/105250>`__",""
 "`P2164R9 <https://wg21.link/P2164R9>`__","``views::enumerate``","2023-02 (Issaquah)","|Complete|","23","`#105251 <https://github.com/llvm/llvm-project/issues/105251>`__",""
 "`P2711R1 <https://wg21.link/P2711R1>`__","Making multi-param constructors of ``views`` ``explicit``","2023-02 (Issaquah)","|Complete|","21","`#105252 <https://github.com/llvm/llvm-project/issues/105252>`__","Implemented as a DR in C++20 since LLVM 23."
-"`P2609R3 <https://wg21.link/P2609R3>`__","Relaxing Ranges Just A Smidge","2023-02 (Issaquah)","|Complete|","20","`#105253 <https://github.com/llvm/llvm-project/issues/105253>`__","Implemented as a DR in C++20. Other implementations will do the same."
+"`P2609R3 <https://wg21.link/P2609R3>`__","Relaxing Ranges Just A Smidge","2023-02 (Issaquah)","|Complete|","20","`#105253 <https://github.com/llvm/llvm-project/issues/105253>`__","Implemented as a DR in C++20."
 "`P2713R1 <https://wg21.link/P2713R1>`__","Escaping improvements in ``std::format``","2023-02 (Issaquah)","|Complete|","19","`#105254 <https://github.com/llvm/llvm-project/issues/105254>`__",""
 "`P2675R1 <https://wg21.link/P2675R1>`__","``format``'s width estimation is too approximate and not forward compatible","2023-02 (Issaquah)","|Complete|","17","`#105255 <https://github.com/llvm/llvm-project/issues/105255>`__",""
 "`P2572R1 <https://wg21.link/P2572R1>`__","``std::format`` fill character allowances","2023-02 (Issaquah)","|Complete|","17","`#105256 <https://github.com/llvm/llvm-project/issues/105256>`__",""
diff --git a/libcxx/docs/Status/Cxx26Issues.csv b/libcxx/docs/Status/Cxx26Issues.csv
index c203fa424556a..5b046b69d14bd 100644
--- a/libcxx/docs/Status/Cxx26Issues.csv
+++ b/libcxx/docs/Status/Cxx26Issues.csv
@@ -344,5 +344,5 @@
 "","","","","","",""
 "`LWG4139 <https://wg21.link/LWG4139>`__","§[time.zone.leap] recursive constraint in ``<=>``","Not Adopted Yet","|Complete|","20","`#118369 <https://github.com/llvm/llvm-project/issues/118369>`__",""
 "`LWG3456 <https://wg21.link/LWG3456>`__","Pattern used by ``std::from_chars`` is underspecified (option B)","Not Adopted Yet","|Complete|","20","`#118370 <https://github.com/llvm/llvm-project/issues/118370>`__",""
-"`LWG3882 <https://wg21.link/LWG3882>`__","``tuple`` relational operators have confused friendships","Not Adopted Yet","|Complete|","22","`#171425 <https://github.com/llvm/llvm-project/issues/171425>`__","The comparison operators are constrained harder than the proposed resolution. libstdc++ and MSVC STL do the same."
+"`LWG3882 <https://wg21.link/LWG3882>`__","``tuple`` relational operators have confused friendships","Not Adopted Yet","|Complete|","22","`#171425 <https://github.com/llvm/llvm-project/issues/171425>`__","The comparison operators are constrained harder than the proposed resolution."
 "","","","","","",""
diff --git a/libcxx/docs/Status/Cxx26Papers.csv b/libcxx/docs/Status/Cxx26Papers.csv
index 2522dd98e4b9c..916bb559f254b 100644
--- a/libcxx/docs/Status/Cxx26Papers.csv
+++ b/libcxx/docs/Status/Cxx26Papers.csv
@@ -7,7 +7,7 @@
 "`P2530R3 <https://wg21.link/P2530R3>`__","Hazard Pointers for C++26","2023-06 (Varna)","","","`#105362 <https://github.com/llvm/llvm-project/issues/105362>`__",""
 "`P2538R1 <https://wg21.link/P2538R1>`__","ADL-proof ``std::projected``","2023-06 (Varna)","|Complete|","18","`#105363 <https://github.com/llvm/llvm-project/issues/105363>`__",""
 "`P2495R3 <https://wg21.link/P2495R3>`__","Interfacing ``stringstream``\s with ``string_view``","2023-06 (Varna)","|Complete|","19","`#105364 <https://github.com/llvm/llvm-project/issues/105364>`__",""
-"`P2510R3 <https://wg21.link/P2510R3>`__","Formatting pointers","2023-06 (Varna)","|Complete|","17","`#105365 <https://github.com/llvm/llvm-project/issues/105365>`__","Implemented as a DR against C++20. (MSVC STL and libstdc++ will do the same.)"
+"`P2510R3 <https://wg21.link/P2510R3>`__","Formatting pointers","2023-06 (Varna)","|Complete|","17","`#105365 <https://github.com/llvm/llvm-project/issues/105365>`__","Implemented as a DR against C++20."
 "`P2198R7 <https://wg21.link/P2198R7>`__","Freestanding Feature-Test Macros and Implementation-Defined Extensions","2023-06 (Varna)","","","`#105368 <https://github.com/llvm/llvm-project/issues/105368>`__",""
 "`P2338R4 <https://wg21.link/P2338R4>`__","Freestanding Library: Character primitives and the C library","2023-06 (Varna)","","","`#105369 <https://github.com/llvm/llvm-project/issues/105369>`__",""
 "`P2013R5 <https://wg21.link/P2013R5>`__","Freestanding Language: Optional ``::operator new``","2023-06 (Varna)","","","`#105370 <https://github.com/llvm/llvm-project/issues/105370>`__",""
@@ -51,7 +51,7 @@
 "`P2869R4 <https://wg21.link/P2869R4>`__","Remove Deprecated ``shared_ptr`` Atomic Access APIs from C++26","2024-03 (Tokyo)","","","`#105412 <https://github.com/llvm/llvm-project/issues/105412>`__",""
 "`P2872R3 <https://wg21.link/P2872R3>`__","Remove ``wstring_convert`` From C++26","2024-03 (Tokyo)","|Complete|","19","`#105413 <https://github.com/llvm/llvm-project/issues/105413>`__",""
 "`P3107R5 <https://wg21.link/P3107R5>`__","Permit an efficient implementation of ``std::print``","2024-03 (Tokyo)","","","`#105414 <https://github.com/llvm/llvm-project/issues/105414>`__",""
-"`P3142R0 <https://wg21.link/P3142R0>`__","Printing Blank Lines with ``println``","2024-03 (Tokyo)","|Complete|","19","`#105415 <https://github.com/llvm/llvm-project/issues/105415>`__","Implemented as a DR against C++23. (MSVC STL and libstdc++ will do the same.)"
+"`P3142R0 <https://wg21.link/P3142R0>`__","Printing Blank Lines with ``println``","2024-03 (Tokyo)","|Complete|","19","`#105415 <https://github.com/llvm/llvm-project/issues/105415>`__","Implemented as a DR against C++23."
 "`P2845R8 <https://wg21.link/P2845R8>`__","Formatting of ``std::filesystem::path``","2024-03 (Tokyo)","","","`#105416 <https://github.com/llvm/llvm-project/issues/105416>`__",""
 "`P0493R5 <https://wg21.link/P0493R5>`__","Atomic minimum/maximum","2024-03 (Tokyo)","","","`#105418 <https://github.com/llvm/llvm-project/issues/105418>`__",""
 "`P2542R8 <https://wg21.link/P2542R8>`__","``views::concat``","2024-03 (Tokyo)","|Complete|","23","`#105419 <https://github.com/llvm/llvm-project/issues/105419>`__",""
@@ -64,7 +64,7 @@
 "`P3029R1 <https://wg21.link/P3029R1>`__","Better ``mdspan``'s CTAD","2024-03 (Tokyo)","|Complete|","19","`#105426 <https://github.com/llvm/llvm-project/issues/105426>`__","Implemented as a DR against C++20 since LLVM 23."
 "","","","","","",""
 "`P2747R2 <https://wg21.link/P2747R2>`__","``constexpr`` placement new","2024-06 (St. Louis)","|Complete|","20","`#105427 <https://github.com/llvm/llvm-project/issues/105427>`__",""
-"`P2997R1 <https://wg21.link/P2997R1>`__","Removing the common reference requirement from the indirectly invocable concepts","2024-06 (St. Louis)","|Complete|","19","`#105428 <https://github.com/llvm/llvm-project/issues/105428>`__","Implemented as a DR against C++20. (MSVC STL and libstdc++ will do the same.)"
+"`P2997R1 <https://wg21.link/P2997R1>`__","Removing the common reference requirement from the indirectly invocable concepts","2024-06 (St. Louis)","|Complete|","19","`#105428 <https://github.com/llvm/llvm-project/issues/105428>`__","Implemented as a DR against C++20."
 "`P2389R2 <https://wg21.link/P2389R2>`__","``dextents`` Index Type Parameter","2024-06 (St. Louis)","|Complete|","19","`#105429 <https://github.com/llvm/llvm-project/issues/105429>`__",""
 "`P3168R2 <https://wg21.link/P3168R2>`__","Give ``std::optional`` Range Support","2024-06 (St. Louis)","|Complete|","22","`#105430 <https://github.com/llvm/llvm-project/issues/105430>`__",""
 "`P3217R0 <https://wg21.link/P3217R0>`__","Adjoints to 'Enabling list-initialization for algorithms': find_last","2024-06 (St. Louis)","","","`#105431 <https://github.com/llvm/llvm-project/issues/105431>`__",""

``````````

</details>


https://github.com/llvm/llvm-project/pull/210637
