clang-p2996/libcxx/docs/Status/Cxx2bPapers.csv at fcaccf817d31d39096f7d0e7014cd6fe2fa3a683

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Christian Trott fcaccf817d [libcxx] Add mdspan/extents

This patch adds std::extents. extents is one of the core classes used by std::mdspan. It describes a multi-dimensional index space with a mix of compile time and runtime sizes. Furthermore, it is templated on the index type used to describe the multi-dimensional index space.

The class is designed to be highly optimizable in performance critical code sections, and is fully useable in constant expressions contexts.

Testing of this class tends to be somewhat combinatorical, due to the large number of possible corner cases involved in situations where we have both runtime and compile time extents. To add to this, the class is designed to be interoperable (in particular constructible) from arguments which only need to be convertible to the index_type, but are otherwise arbitrary user types. For a larger discussion on the design of this class refer to: https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p0009r18.html

Co-authored-by: Damien L-G <dalg24@gmail.com>

Reviewed By: ldionne, #libc

Spies: libcxx-commits, H-G-Hristov, tschuett, philnik, arichardson, Mordante, crtrott

Differential Revision: https://reviews.llvm.org/D148067

2023-05-16 14:30:36 -07:00

14 KiB

Raw Blame History

1	Paper #	Group	Paper Name	Meeting	Status	First released version	Labels
2	`P0881R7 <https://wg21.link/P0881R7>`__	LWG	A Proposal to add stacktrace library	Autumn 2020
3	`P0943R6 <https://wg21.link/P0943R6>`__	LWG	Support C atomics in C++	Autumn 2020	\|Complete\|	15.0
4	`P1048R1 <https://wg21.link/P1048R1>`__	LWG	A proposal for a type trait to detect scoped enumerations	Autumn 2020	\|Complete\|	12.0
5	`P1679R3 <https://wg21.link/P1679R3>`__	LWG	string contains function	Autumn 2020	\|Complete\|	12.0
6
7	`P1682R3 <https://wg21.link/P1682R3>`__	LWG	std::to_underlying for enumerations	February 2021	\|Complete\|	13.0
8	`P2017R1 <https://wg21.link/P2017R1>`__	LWG	Conditionally borrowed ranges	February 2021			\|ranges\|
9	`P2160R1 <https://wg21.link/P2160R1>`__	LWG	Locks lock lockables	February 2021
10	`P2162R2 <https://wg21.link/P2162R2>`__	LWG	Inheriting from std::variant	February 2021	\|Complete\|	13.0
11	`P2212R2 <https://wg21.link/P2212R2>`__	LWG	Relax Requirements for time_point::clock	February 2021
12	`P2259R1 <https://wg21.link/P2259R1>`__	LWG	Repairing input range adaptors and counted_iterator	February 2021			\|ranges\|
13
14	`P0401R6 <https://wg21.link/P0401R6>`__	LWG	Providing size feedback in the Allocator interface	June 2021	\|Complete\|	15.0
15	`P0448R4 <https://wg21.link/P0448R4>`__	LWG	A strstream replacement using span<charT> as buffer	June 2021
16	`P1132R8 <https://wg21.link/P1132R8>`__	LWG	out_ptr - a scalable output pointer abstraction	June 2021
17	`P1328R1 <https://wg21.link/P1328R1>`__	LWG	Making std::type_info::operator== constexpr	June 2021	\|Complete\|	17.0
18	`P1425R4 <https://wg21.link/P1425R4>`__	LWG	Iterators pair constructors for stack and queue	June 2021	\|Complete\|	14.0	\|ranges\|
19	`P1518R2 <https://wg21.link/P1518R2>`__	LWG	Stop overconstraining allocators in container deduction guides	June 2021	\|Complete\|	13.0
20	`P1659R3 <https://wg21.link/P1659R3>`__	LWG	starts_with and ends_with	June 2021			\|ranges\|
21	`P1951R1 <https://wg21.link/P1951R1>`__	LWG	Default Arguments for pair Forwarding Constructor	June 2021	\|Complete\|	14.0
22	`P1989R2 <https://wg21.link/P1989R2>`__	LWG	Range constructor for std::string_view	June 2021	\|Complete\|	14.0	\|ranges\|
23	`P2136R3 <https://wg21.link/P2136R3>`__	LWG	invoke_r	June 2021	\|Complete\|	17.0
24	`P2166R1 <https://wg21.link/P2166R1>`__	LWG	A Proposal to Prohibit std::basic_string and std::basic_string_view construction from nullptr	June 2021	\|Complete\|	13.0
25
26	`P0288R9 <https://wg21.link/P0288R9>`__	LWG	``any_invocable``	October 2021
27	`P0798R8 <https://wg21.link/P0798R8>`__	LWG	Monadic operations for ``std::optional``	October 2021	\|Complete\|	14.0
28	`P0849R8 <https://wg21.link/P0849R8>`__	LWG	``auto(x)``: ``DECAY_COPY`` in the language	October 2021	\|Complete\|	14.0
29	`P1072R10 <https://wg21.link/P1072R10>`__	LWG	``basic_string::resize_and_overwrite``	October 2021	\|Complete\|	14.0
30	`P1147R1 <https://wg21.link/P1147R1>`__	LWG	Printing ``volatile`` Pointers	October 2021	\|Complete\|	14.0
31	`P1272R4 <https://wg21.link/P1272R4>`__	LWG	Byteswapping for fun&&nuf	October 2021	\|Complete\|	14.0
32	`P1675R2 <https://wg21.link/P1675R2>`__	LWG	``rethrow_exception`` must be allowed to copy	October 2021
33	`P2077R3 <https://wg21.link/P2077R3>`__	LWG	Heterogeneous erasure overloads for associative containers	October 2021
34	`P2251R1 <https://wg21.link/P2251R1>`__	LWG	Require ``span`` & ``basic_string_view`` to be Trivially Copyable	October 2021	\|Complete\|	14.0
35	`P2301R1 <https://wg21.link/P2301R1>`__	LWG	Add a ``pmr`` alias for ``std::stacktrace``	October 2021
36	`P2321R2 <https://wg21.link/P2321R2>`__	LWG	``zip``	October 2021	\|In Progress\|		\|ranges\|
37	`P2340R1 <https://wg21.link/P2340R1>`__	LWG	Clarifying the status of the 'C headers'	October 2021
38	`P2393R1 <https://wg21.link/P2393R1>`__	LWG	Cleaning up ``integer``-class types	October 2021
39	`P2401R0 <https://wg21.link/P2401R0>`__	LWG	Add a conditional ``noexcept`` specification to ``std::exchange``	October 2021	\|Complete\|	14.0
40
41	`P0323R12 <https://wg21.link/P0323R12>`__	LWG	``std::expected``	February 2022	\|Complete\|	16.0
42	`P0533R9 <https://wg21.link/P0533R9>`__	LWG	``constexpr`` for ``<cmath>`` and ``<cstdlib>``	February 2022	\|In progress\| [#note-P0533R9]_
43	`P0627R6 <https://wg21.link/P0627R6>`__	LWG	Function to mark unreachable code	February 2022	\|Complete\|	15.0
44	`P1206R7 <https://wg21.link/P1206R7>`__	LWG	``ranges::to``: A function to convert any range to a container	February 2022	\|In Progress\|		\|ranges\|
45	`P1413R3 <https://wg21.link/P1413R3>`__	LWG	Deprecate ``std::aligned_storage`` and ``std::aligned_union``	February 2022	\|Complete\| [#note-P1413R3]_
46	`P2255R2 <https://wg21.link/P2255R2>`__	LWG	A type trait to detect reference binding to temporary	February 2022
47	`P2273R3 <https://wg21.link/P2273R3>`__	LWG	Making ``std::unique_ptr`` constexpr	February 2022	\|Complete\|	16.0
48	`P2387R3 <https://wg21.link/P2387R3>`__	LWG	Pipe support for user-defined range adaptors	February 2022			\|ranges\|
49	`P2440R1 <https://wg21.link/P2440R1>`__	LWG	``ranges::iota``, ``ranges::shift_left`` and ``ranges::shift_right``	February 2022			\|ranges\|
50	`P2441R2 <https://wg21.link/P2441R2>`__	LWG	``views::join_with``	February 2022			\|ranges\|
51	`P2442R1 <https://wg21.link/P2442R1>`__	LWG	Windowing range adaptors: ``views::chunk`` and ``views::slide``	February 2022			\|ranges\|
52	`P2443R1 <https://wg21.link/P2443R1>`__	LWG	``views::chunk_by``	February 2022			\|ranges\|
53
54	`P0009R18 <https://wg21.link/P0009R18>`__	LWG	mdspan: A Non-Owning Multidimensional Array Reference	July 2022	\|In progress\|
55	`P0429R9 <https://wg21.link/P0429R9>`__	LWG	A Standard ``flat_map``	July 2022
56	`P1169R4 <https://wg21.link/P1169R4>`__	LWG	``static operator()``	July 2022	\|Complete\|	16.0
57	`P1222R4 <https://wg21.link/P1222R4>`__	LWG	A Standard ``flat_set``	July 2022
58	`P1223R5 <https://wg21.link/P1223R5>`__	LWG	``ranges::find_last()``, ``ranges::find_last_if()``, and ``ranges::find_last_if_not()``	July 2022			\|ranges\|
59	`P1467R9 <https://wg21.link/P1467R9>`__	LWG	Extended ``floating-point`` types and standard names	July 2022
60	`P1642R11 <https://wg21.link/P1642R11>`__	LWG	Freestanding ``[utilities]``, ``[ranges]``, and ``[iterators]``	July 2022
61	`P1899R3 <https://wg21.link/P1899R3>`__	LWG	``stride_view``	July 2022			\|ranges\|
62	`P2093R14 <https://wg21.link/P2093R14>`__	LWG	Formatted output	July 2022
63	`P2165R4 <https://wg21.link/P2165R4>`__	LWG	Compatibility between ``tuple``, ``pair`` and ``tuple-like`` objects	July 2022
64	`P2278R4 <https://wg21.link/P2278R4>`__	LWG	``cbegin`` should always return a constant iterator	July 2022			\|ranges\|
65	`P2286R8 <https://wg21.link/P2286R8>`__	LWG	Formatting Ranges	July 2022	\|Complete\|	16.0	\|format\| \|ranges\|
66	`P2291R3 <https://wg21.link/P2291R3>`__	LWG	Add Constexpr Modifiers to Functions ``to_chars`` and ``from_chars`` for Integral Types in ``<charconv>`` Header	July 2022	\|Complete\|	16.0
67	`P2302R4 <https://wg21.link/P2302R4>`__	LWG	``std::ranges::contains``	July 2022			\|ranges\|
68	`P2322R6 <https://wg21.link/P2322R6>`__	LWG	``ranges::fold``	July 2022			\|ranges\|
69	`P2374R4 <https://wg21.link/P2374R4>`__	LWG	``views::cartesian_product``	July 2022			\|ranges\|
70	`P2404R3 <https://wg21.link/P2404R3>`__	LWG	Move-only types for ``equality_comparable_with``, ``totally_ordered_with``, and ``three_way_comparable_with``	July 2022
71	`P2408R5 <https://wg21.link/P2408R5>`__	LWG	Ranges iterators as inputs to non-Ranges algorithms	July 2022			\|ranges\|
72	`P2417R2 <https://wg21.link/P2417R2>`__	LWG	A more ``constexpr`` ``bitset``	July 2022	\|Complete\|	16.0
73	`P2419R2 <https://wg21.link/P2419R2>`__	LWG	Clarify handling of encodings in localized formatting of chrono types	July 2022
74	`P2438R2 <https://wg21.link/P2438R2>`__	LWG	``std::string::substr() &&``	July 2022	\|Complete\|	16.0
75	`P2445R1 <https://wg21.link/P2445R1>`__	LWG	``forward_like``	July 2022	\|Complete\|	16.0
76	`P2446R2 <https://wg21.link/P2446R2>`__	LWG	``views::as_rvalue``	July 2022	\|Complete\|	16.0	\|ranges\|
77	`P2460R2 <https://wg21.link/P2460R2>`__	LWG	Relax requirements on ``wchar_t`` to match existing practices	July 2022
78	`P2465R3 <https://wg21.link/P2465R3>`__	LWG	Standard Library Modules ``std`` and ``std.compat``	July 2022
79	`P2467R1 <https://wg21.link/P2467R1>`__	LWG	Support exclusive mode for ``fstreams``	July 2022
80	`P2474R2 <https://wg21.link/P2474R2>`__	LWG	``views::repeat``	July 2022			\|ranges\|
81	`P2494R2 <https://wg21.link/P2494R2>`__	LWG	Relaxing range adaptors to allow for move only types	July 2022			\|ranges\|
82	`P2499R0 <https://wg21.link/P2499R0>`__	LWG	``string_view`` range constructor should be ``explicit``	July 2022	\|Complete\|	16.0	\|ranges\|
83	`P2502R2 <https://wg21.link/P2502R2>`__	LWG	``std::generator``: Synchronous Coroutine Generator for Ranges	July 2022			\|ranges\|
84	`P2508R1 <https://wg21.link/P2508R1>`__	LWG	Exposing ``std::basic-format-string``	July 2022	\|Complete\|	15.0
85	`P2513R4 <https://wg21.link/P2513R4>`__	LWG	``char8_t`` Compatibility and Portability Fixes	July 2022
86	`P2517R1 <https://wg21.link/P2517R1>`__	LWG	Add a conditional ``noexcept`` specification to ``std::apply``	July 2022
87	`P2520R0 <https://wg21.link/P2520R0>`__	LWG	``move_iterator`` should be a random access iterator	July 2022	\|Complete\| [#note-P2520R0]_	17.0	\|ranges\|
88	`P2540R1 <https://wg21.link/P2540R1>`__	LWG	Empty Product for certain Views	July 2022			\|ranges\|
89	`P2549R1 <https://wg21.link/P2549R1>`__	LWG	``std::unexpected`` should have ``error()`` as member accessor	July 2022	\|Complete\|	16.0
90	`P2553R1 <https://wg21.link/P2553R1>`__	LWG	Make ``mdspan`` ``size_type`` controllable	July 2022
91	`P2554R0 <https://wg21.link/P2554R0>`__	LWG	C-Array Interoperability of MDSpan	July 2022
92	`P2585R0 <https://wg21.link/P2585R0>`__	LWG	Improving default container formatting	July 2022	\|Complete\|	17.0
93	`P2590R2 <https://wg21.link/P2590R2>`__	LWG	Explicit lifetime management	July 2022
94	`P2599R2 <https://wg21.link/P2599R2>`__	LWG	``mdspan::size_type`` should be ``index_type``	July 2022
95	`P2604R0 <https://wg21.link/P2604R0>`__	LWG	mdspan: rename pointer and contiguous	July 2022
96	`P2613R1 <https://wg21.link/P2613R1>`__	LWG	Add the missing ``empty`` to ``mdspan``	July 2022
97
98	`P1202R5 <https://wg21.link/P1202R5>`__	LWG	Asymmetric Fences	November 2022			\|concurrency TS\|
99	`P1264R2 <https://wg21.link/P1264R2>`__	LWG	Revising the wording of ``stream`` input operations	November 2022	\|Complete\|	9.0
100	`P1478R8 <https://wg21.link/P1478R8>`__	LWG	``Byte-wise`` ``atomic`` ``memcpy``	November 2022			\|concurrency TS\|
101	`P2167R3 <https://wg21.link/P2167R3>`__	LWG	Improved Proposed Wording for LWG 2114	November 2022
102	`P2396R1 <https://wg21.link/P2396R1>`__	LWG	Concurrency TS 2 fixes	November 2022			\|concurrency TS\|
103	`P2505R5 <https://wg21.link/P2505R5>`__	LWG	Monadic Functions for ``std::expected``	November 2022
104	`P2539R4 <https://wg21.link/P2539R4>`__	LWG	Should the output of ``std::print`` to a terminal be synchronized with the underlying stream?	November 2022			\|format\|
105	`P2602R2 <https://wg21.link/P2602R2>`__	LWG	Poison Pills are Too Toxic	November 2022			\|ranges\|
106	`P2708R1 <https://wg21.link/P2708R1>`__	LWG	No Further Fundamentals TSes	November 2022	\|Nothing to do\|
107
108	`P0290R4 <https://wg21.link/P0290R4>`__	LWG	``apply()`` for ``synchronized_value<T>``	February 2023			\|concurrency TS\|
109	`P2770R0 <https://wg21.link/P2770R0>`__	LWG	Stashing stashing ``iterators`` for proper flattening	February 2023			\|ranges\|
110	`P2164R9 <https://wg21.link/P2164R9>`__	LWG	``views::enumerate``	February 2023			\|ranges\|
111	`P2711R1 <https://wg21.link/P2711R1>`__	LWG	Making multi-param constructors of ``views`` ``explicit``	February 2023	\|Partial\| [#note-P2711R1]_		\|ranges\|
112	`P2609R3 <https://wg21.link/P2609R3>`__	LWG	Relaxing Ranges Just A Smidge	February 2023			\|ranges\|
113	`P2713R1 <https://wg21.link/P2713R1>`__	LWG	Escaping improvements in ``std::format``	February 2023			\|format\|
114	`P2675R1 <https://wg21.link/P2675R1>`__	LWG	``format``'s width estimation is too approximate and not forward compatible	February 2023	\|Complete\|	17.0	\|format\|
115	`P2572R1 <https://wg21.link/P2572R1>`__	LWG	``std::format`` fill character allowances	February 2023			\|format\|
116	`P2693R1 <https://wg21.link/P2693R1>`__	LWG	Formatting ``thread::id`` and ``stacktrace``	February 2023	\|Partial\| [#note-P2693R1]_		\|format\|
117	`P2679R2 <https://wg21.link/P2679R2>`__	LWG	Fixing ``std::start_lifetime_as`` for arrays	February 2023
118	`P2674R1 <https://wg21.link/P2674R1>`__	LWG	A trait for implicit lifetime types	February 2023
119	`P2655R3 <https://wg21.link/P2655R3>`__	LWG	``common_reference_t`` of ``reference_wrapper`` Should Be a Reference Type	February 2023
120	`P2652R2 <https://wg21.link/P2652R2>`__	LWG	Disallow User Specialization of ``allocator_traits``	February 2023
121	`P2787R1 <https://wg21.link/P2787R1>`__	LWG	``pmr::generator`` - Promise Types are not Values	February 2023
122	`P2614R2 <https://wg21.link/P2614R2>`__	LWG	Deprecate ``numeric_limits::has_denorm``	February 2023
123	`P2588R3 <https://wg21.link/P2588R3>`__	LWG	``barrier``’s phase completion guarantees	February 2023
124	`P2763R1 <https://wg21.link/P2763R1>`__	LWG	``layout_stride`` static extents default constructor fix	February 2023
125	`P2736R2 <https://wg21.link/P2736R2>`__	CWG	Referencing The Unicode Standard	February 2023			\|format\|

14 KiB Raw Blame History

14 KiB

Raw Blame History