Compiler support for C++23
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< cpp | compiler support
* - hover over a cell marked with the star * to see additional pop-up notes.
DRnn - the number nn after "DR" denotes target C++ revision the Defect Report is applied to, e.g., DR20 → C++20.
C++23 core language features
| C++23 feature |
Paper(s) |
GCC |
Clang |
MSVC |
Apple Clang |
EDG eccp |
Intel C++ |
Nvidia HPC C++ (ex PGI)* |
Nvidia nvcc |
Cray |
|
|---|---|---|---|---|---|---|---|---|---|---|---|
| Literal suffix for (signed) size_t (FTM)* | P0330R8 | 11 | 13 | 19.43* | 13.1.6* | 6.5 | 2022.2 | 23.9 | |||
Make () more optional for lambdas
|
P1102R2 | 11 | 13 | 13.1.6* | 6.3 | 2022.2 | 22.5 | ||||
| if consteval (FTM)* | P1938R3 | 12 | 14 | 14.0.0* | 6.3 | 2022.2 | 24.1 | ||||
| Removing Garbage Collection Support | P2186R2 | 12 | N/A | 19.30* | N/A | N/A | |||||
| Narrowing contextual conversions in static_assert and constexpr if | P1401R5 | 9 | 13 (partial)* 14 |
14.0.0* | 2022.2 | 20.7 | |||||
| Trimming whitespaces before line splicing | P2223R2 | Yes | Yes | Yes | 6.7 | 2022.2 | Yes | ||||
| Make declaration order layout mandated | P1847R4 | Yes | Yes | Yes | Yes | 2022.2 | Yes | ||||
| Removing mixed wide string literal concatenation | P2201R1 | Yes | Yes | Yes | Yes | Yes | Yes | Yes | |||
| Explicit object member functions (deducing this) (FTM)* | P0847R7 | 14 | 18 19* |
19.32* (partial)* |
6.3 | 22.5 | |||||
auto(x) and auto{x} (FTM)*
|
P0849R8 | 12 | 15 | 14.0.3* | 6.4 | 2022.2 | 23.3 | ||||
#elifdef and #elifndef
|
P2334R1 | 12 | 13 | 19.40* | 13.1.6* | 6.5 | 2022.2 | 23.9 | |||
| Non-literal variables (and labels and gotos) in constexpr functions (FTM)* | P2242R3 | 12 | 15 | 14.0.3* | 6.3 | 2022.2 | 22.5 | ||||
| Consistent character literal encoding | P2316R2 | Yes | Yes | 19.30* | Yes | Yes | 2022.2 | Yes | |||
| Character sets and encodings | P2314R4 | 10 | Yes | Yes | Yes | 2022.2 | Yes | ||||
Extend init-statement (of for loop) to allow alias-declaration
|
P2360R0 | 12 | 14 | 14.0.0* | 2022.2 | ||||||
| Multidimensional subscript operator (FTM)* | P2128R6 | 12 | 15 | 14.0.3* | 2022.2 | ||||||
| Attributes on lambdas | P2173R1 | 9 | 13 | 13.1.6* | 6.6 | 2022.2 | 22.5 | ||||
#warning
|
P2437R1 | Yes* | Yes | 15.0.0* | 6.5 | 2023.2 | Yes | ||||
| Remove non-encodable wide character literals and multicharacter wide character literals | P2362R3 | 13 | 14 | 15.0.0* | 6.7 | 2023.2 | |||||
| Labels at the end of compound statements | P2324R2 | 13 | 16 | 16.0.0* | 6.5 | 2023.2 | 23.9 | ||||
| Delimited escape sequences | P2290R3 | 13 | 15 | 15.0.0* | 6.7 | 2023.2 | |||||
| Named universal character escapes (FTM)* | P2071R2 | 13 | 15 | 15.0.0* | 6.7 | 2023.2 | |||||
| Relaxing some constexpr restrictions (FTM)* | P2448R2 | 13 | 17 (partial) 19 |
2024.0 (partial) | |||||||
| Simpler implicit move (FTM)* | P2266R3 | 13 | 13 | 6.7 | 2022.2 | ||||||
| static operator() (FTM)* | P1169R4 | 13 | 16 | 16.0.0* | 6.7 | 2023.2 | |||||
| Requirements for optional extended floating-point types | P1467R9 | 13 | N/A | 6.4 | |||||||
| Class template argument deduction from inherited constructors | P2582R1 | 14 | |||||||||
Attribute [[assume]]
|
P1774R8 | 13 | 19 | ||||||||
| Support for UTF-8 as a portable source file encoding | P2295R6 | 13* | 15* | 19.0 (Update 2)** | 15.0.0* | 2023.2 | |||||
| static operator[] (FTM)* | P2589R1 | 13 | 16 | 16.0.0* | 6.7 | 2023.2 | |||||
| Permitting static constexpr variables in constexpr functions (FTM)* | P2647R1 | 13 | 16 | 16.0.0* | 2023.2 | ||||||
| Extending the lifetime of temporaries in range-based for loop initializer (FTM)* | P2644R1 P2718R0 CWG2659 |
15 | 19 | ||||||||
| DR11: Change scope of lambda trailing-return-type | P2036R3 P2579R0 |
17 | 2023.2 | ||||||||
| DR20: Meaningful exports | P2615R1 | 15 | 17 (partial) | ||||||||
| DR20: consteval needs to propagate up (FTM)* | P2564R3 | 14 | 17 | 16.0.0* | 6.7 | 2024.0 | |||||
| DR98: C++ Identifier Syntax using Unicode Standard Annex 31 | P1949R7 | 12 | 14 | 14.0.0* | 6.4 | 2022.2 | |||||
| DR11: Allow duplicate attributes | P2156R1 | 11 | 13 | 13.1.6* | 6.5 | 23.9 | |||||
DR20: Adjusting the value of feature-test macro __cpp_concepts
|
P2493R0 | 12 | 19.32* | 6.4 | 23.3 | ||||||
| DR98: Relax requirements on wchar_t to match existing practices | P2460R2 | Yes | Yes | 15.0.0* | N/A | 2023.2 | |||||
| DR11: Using unknown pointers and references in constant expressions | P2280R4 | 14 | 20* | ||||||||
| DR20: The Equality Operator You Are Looking For | P2468R2 | 13 | 16 | 16.0.0* | 2023.2 | ||||||
| DR20: char8_t Compatibility and Portability Fix (FTM)* | P2513R4 | 13 | 16 | 19.34* | 16.0.0* | 2023.2 | |||||
| DR98/11: Clarify reporting of diagnostic directives and allow static_assert of non-value-dependent expressions in a template context | CWG2518 | 13 | 17 | 16.0* (partial)* 19.40* |
|||||||
| C++23 feature |
Paper(s) |
GCC |
Clang |
MSVC |
Apple Clang |
EDG eccp |
Intel C++ |
Nvidia HPC C++ (ex PGI)* |
Nvidia nvcc |
Cray |
C++23 library features
| C++23 feature |
Paper(s) |
GCC libstdc++ |
Clang libc++ |
MSVC STL |
Apple Clang* |
|
|---|---|---|---|---|---|---|
| Stacktrace library (FTM)* | P0881R7 P2301R1 |
12 (partial)* 14* |
19.34* | |||
| <stdatomic.h> (FTM)* | P0943R6 | 12 | 15 | 19.31* | 14.0.3* | |
| std::is_scoped_enum (FTM)* | P1048R1 | 11 | 12 | 19.30* | 13.0.0* | |
| std::basic_string::contains(), std::basic_string_view::contains() (FTM)* | P1679R3 | 11 | 12 | 19.30* | 13.0.0* | |
| std::to_underlying (FTM)* | P1682R3 | 11 | 13 | 19.30* | 13.1.6* | |
| Relaxing requirements for time_point<>::clock | P2212R2 | N/A | N/A | N/A | N/A | |
| Providing size feedback in the Allocator interface (FTM)* | P0401R6 | 15 | 19.30* | 14.0.3* | ||
| <spanstream>: string-stream with std::span-based buffer (FTM)* | P0448R4 | 12 | 19.31* | |||
| std::out_ptr(), std::inout_ptr() (FTM)* | P1132R8 | 14 | 19 | 19.30* | ||
| constexpr type_info::operator==() (FTM)* | P1328R1 | 12 | 17 | 19.33** 19.34* |
15.0.0* | |
| Iterator pair constructors for std::stack and std::queue (FTM)* | P1425R4 | 12 | 14 | 19.31* | 14.0.3* | |
| Non-deduction context for allocators in container deduction guides | P1518R2 | 12* | 13* | 19.31** | 13.1.6** | |
| ranges::starts_with() and ranges::ends_with() (FTM)* | P1659R3 | 17 (partial)* 18 |
19.31* | 16.0.0* | ||
| Prohibiting std::basic_string and std::basic_string_view construction from nullptr | P2166R1 | 12 | 13 | 19.30* | 13.1.6* | |
| std::invoke_r() (FTM)* | P2136R3 | 12 | 17 | 19.31* | 15.0.0* | |
| Range constructor for std::basic_string_view | P1989R2 | 11 | 14 | 19.30* | 14.0.3* | |
| Default template arguments for std::pair's forwarding constructor | P1951R1 | 14 | 14 | 19.30* | 14.0.3* | |
| Remove Garbage Collection and Reachability-Based Leak Detection (library support) | P2186R2 | 12 | 14 | 19.30* | 14.0.3* | |
| zip: views::zip, views::zip_transform, views::adjacent, and views::adjacent_transform (FTM)* | P2321R2 | 13 | 15 (partial)* | 19.33*(partial)*** 19.37* |
14.0.3* | |
| Heterogeneous erasure overloads for associative containers (FTM)* | P2077R3 | 19.32* | ||||
| std::byteswap() (FTM)* | P1272R4 | 12 | 14 | 19.31* | 14.0.3* | |
| Printing volatile T* | P1147R1 | 11.3 | 14 | 19.31* | 14.0.3* | |
| basic_string::resize_and_overwrite() (FTM)* | P1072R10 | 12 | 14 | 19.31* | 14.0.3* | |
| Monadic operations for std::optional (FTM)* | P0798R8 | 12 | 14 | 19.32* | 14.0.3* | |
| std::move_only_function (FTM)* | P0288R9 | 12 | 19.32* | |||
| Add a conditional noexcept specification to std::exchange | P2401R0 | 12 | 14 | 19.25* | 14.0.3* | |
| Require std::span & std::basic_string_view to be TriviallyCopyable | P2251R1 | Yes | Yes | Yes | Yes | |
| Clarifying the status of the “C headers” | P2340R1 | Yes | Yes | Yes | Yes | |
| <expected> (FTM)* | P0323R12 P2549R1 |
12 | 16 | 19.33* | 15.0.0* | |
| constexpr for <cmath> and <cstdlib> (FTM)* | P0533R9 | 4.6 (partial)* | ||||
| std::unreachable() (FTM)* | P0627R6 | 12 | 15 | 19.32* | 14.0.3* | |
| Deprecating std::aligned_storage and std::aligned_union | P1413R3 | 13 | 16 | 19.33* | ||
| std::reference_constructs_from_temporary & std::reference_converts_from_temporary (FTM)* | P2255R2 | 13 (partial)* 14 |
19 | |||
| constexpr std::unique_ptr (FTM)* | P2273R3 | 12 | 16 | 19.33* | 15.0.0* | |
| Constructing containers and strings from ranges with ranges::to(), tagged constructors, insert and assign member functions (FTM)* (FTM)* | P1206R7 | 14 (partial)* | 17 | 19.34* | 15.0.0* | |
| Pipe support for user-defined range adaptors (ranges::range_adaptor_closure, std::bind_back) (FTM)* (FTM)* | P2387R3 | 13 (partial)* 14 |
19 | 19.34* | ||
| ranges::iota(), ranges::shift_left(), and ranges::shift_right() (FTM)* (FTM)* | P2440R1 | 13 (partial)* | 19.34* | |||
| views::join_with (FTM)* | P2441R2 | 13 | 19.34* | |||
| views::chunk and views::slide (FTM)* (FTM)* | P2442R1 | 13 | 19.33* | |||
| views::chunk_by (FTM)* | P2443R1 | 13 | 18 | 19.33* | 16.0.0* | |
| std::mdspan: a non-owning multidimensional array reference (FTM)* | P0009R18 P2599R2 P2604R0 P2613R1 P2763R1 |
17 (partial)* 18 |
19.39* | 15.0.0* | ||
| <flat_map> (FTM)* | P0429R9 | 15 | 20 | |||
| <flat_set> (FTM)* | P1222R4 | 15 | ||||
| ranges::find_last(), ranges::find_last_if(), and ranges::find_last_if_not() (FTM)* | P1223R5 | 13 | 19 | 19.36* | ||
| Freestanding Library: Easy <utility>, <ranges>, and <iterator> | P1642R11 | 13* | N/A | |||
| views::stride (FTM)* | P1899R3 | 13 | 19.34* | |||
| Compatibility between std::tuple and tuple-like objects (FTM)* | P2165R4 | 14 | 2.9 (partial)* | 19.36* (partial)* 19.37* |
partial* | |
| Rectifying constant iterators, sentinels, and ranges. views::as_const (FTM)* | P2278R4 | 13 | 19.35* (partial)* 19.36* |
|||
| Formatting Ranges (FTM)* | P2286R8 | 16 | 19.37*(partial)* 19.39*(partial)* 19.41*(partial)* 19.42* |
15.0.0* | ||
| Improve default container formatting (FTM)* | P2585R1 | 16 (partial)* 17 |
19.42* | 15.0.0* | ||
| Formatted output library <print> (FTM)* | P2093R14 P2539R4 |
14 | 17 (partial)* 18 |
19.37* | 15.0.0** 16.0.0* | |
| Formatting std::thread::id and std::stacktrace (FTM)* | P2693R1 | 14 | 17 (partial)* | 19.38* | 15.0.0* | |
| constexpr for integral overloads of std::to_chars() and std::from_chars() (FTM)* | P2291R3 | 13 | 16 | 19.34* | 15.0.0* | |
| ranges::contains() and ranges::contains_subrange() (FTM)* | P2302R4 | 13 | 19 | 19.34* | 16.0.0** | |
| Ranges fold algorithms (FTM)* | P2322R6 | 13 | 19.35* | |||
| views::cartesian_product (FTM)* | P2374R4 P2540R1 |
13 | 19.37* | |||
Adding move-only types support for comparison concepts (equality_comparable, totally_ordered, three_way_comparable) (FTM)*
|
P2404R3 | 19.36* | ||||
| Ranges iterators as inputs to non-ranges algorithms (FTM)* | P2408R5 | 19.34* | ||||
| constexpr std::bitset (FTM)* | P2417R2 | 13 | 16 | 19.34* | 15.0.0* | |
basic_string::substr() &&
|
P2438R2 | 16 | 19.34* | 15.0.0* | ||
| views::as_rvalue (FTM)* | P2446R2 | 13 | 16 | 19.34* | 15.0.0* | |
| Standard Library Modules (FTM)* | P2465R3 | 15* | 17 (partial)* | 19.35* (partial)* 19.36* |
||
| std::forward_like() (FTM)* | P2445R1 | 14 | 16 | 19.34* | 15.0.0* | |
| Support exclusive mode for std::fstream (FTM)* | P2467R1 | 12 | 18 | 19.36* | 16.0.0* | |
| views::repeat (FTM)* | P2474R2 | 13 | 17 | 19.36* | 15.0.0* | |
| Relaxing range adaptors to allow for move-only types (FTM)* | P2494R2 | 14 | 17 | 19.34* | 15.0.0* | |
| std::basic_string_view range constructor should be explicit | P2499R0 | 12.2 | 16 | 19.34* | 15.0.0* | |
| std::generator: synchronous coroutine generator for ranges (FTM)* | P2502R2 P2787R0 |
14 | 19.43* | |||
| Add a conditional noexcept specification to std::apply | P2517R1 | 10 | 18 | 19.34* | 16.0.0* | |
| Explicit lifetime management (std::start_lifetime_as) (FTM)* | P2590R2 P2679R2 |
|||||
| Clarify handling of encodings in localized formatting of chrono types (FTM)* | P2419R2 | 15* | 19.34** | |||
std::move_iterator should not always be input_iterator (FTM)*
|
P2520R0 | 12.3* | 17* | 19.34** | 15.0.0* | |
| Deduction guides update for explicit object parameter call operators | LWG3617 | 14 | 19.34* | |||
| Deduction guides update for static operator() | P1169R4 | 13 | 16 | 19.39* | 15.0.0* | |
| Standard names and library support for extended floating-point types | P1467R9 | 13 | 19.37** | |||
| Monadic operations for std::expected (FTM)* | P2505R5 | 13 | 17 | 19.36* | 15.0.0* | |
| views::enumerate (FTM)* | P2164R9 | 13 | 19.37* | |||
| std::is_implicit_lifetime (FTM)* | P2674R1 | 20 | ||||
| std::common_reference_t of std::reference_wrapper should be a reference type (FTM)* (FTM)* | P2655R3 | 19.37* | ||||
| Disallowing user specialization of std::allocator_traits | P2652R2 | 19 | 19.37* | |||
| Deprecating std::numeric_limits::has_denorm | P2614R2 | 18 | 19.37* | 16.0.0* | ||
| Making Multi-Param Constructors Of views explicit | P2711R1 | 17 (partial)* | 19.36** | 15.0.0* | ||
| DR20: Relaxing Ranges Just A Smidge (FTM)* | P2609R3 | 15 | 20 | 19.37* | ||
| DR20: Stashing Stashing Iterators For Proper Flattening | P2770R0 | 14 | 18 | 19.37* | ||
| DR17: std::visit() for classes derived from std::variant (FTM)* | P2162R2 | 11.3 | 13 | 19.20** 19.30* |
13.1.6* | |
| DR20: Conditionally borrowed ranges | P2017R1 | 11 | 16 | 19.30* | ||
| DR20: Repairing input range adaptors and std::counted_iterator | P2259R1 | 12 | 19.30*(partial)* 19.31* |
|||
| DR20: views::join should join all views of ranges | P2328R1 | 11.2 | 15 | 19.30* | 14.0.3* | |
DR20: view does not require default_initializable (FTM)*
|
P2325R3 | 11.3 | 16 | 19.30* | 15.0.0* | |
| DR20: Range adaptor objects bind arguments by value | P2281R1 | 11 | 14 | 19.29 (16.10)* (partial)* 19.31* |
14.0.3* | |
| DR20: constexpr for std::optional and std::variant (FTM)* (FTM)* | P2231R1 | 11.3 (partial)* 12 |
13 (partial)* 19 |
19.31* | 13.1.6* (partial) | |
| DR20: views::lazy_split and redesigned views::split | P2210R2 | 12 | 16 | 19.31* | 15.0.0* | |
| DR20: Fix ranges::istream_view | P2432R1 | 12 | 16 | 19.31* | 15.0.0* | |
DR20: view with ownership (FTM)*
|
P2415R2 | 12 | 14 | 19.31* | 14.0.3* | |
| DR20: Fixing locale handling in chrono formatters (FTM)* | P2372R3 P2418R2 |
13 | 19.31* | |||
| DR20: Cleaning up integer-class types | P2393R1 | 19.32* | ||||
| DR20: Compile-time format string checks; Reducing binary code size of std::format() family (FTM)* | P2216R3 | 13 | 14 (partial)* 15 |
19.32* | 14.0.3* | |
| DR20: Add support for non-const-formattable types to std::format | P2418R2 | 13 | 15 | 19.32* | 14.0.3* | |
| DR20: std::basic_format_string | P2508R1 | 13 | 15 | 19.35* | 14.0.3* | |
| DR20: Poison Pills are Too Toxic (FTM)* | P2602R2 | 14 | 19 | 19.36* | ||
| DR20: std::format fill character allowances | P2572R1 | 14 | 17 | 19.37* | ||
| DR20: Improving std::format's width estimation | P2675R1 | 14 | 17 | 19.38* | ||
| DR20: std::barrier's phase completion guarantees (FTM)* | P2588R3 | 19.28 (16.8)** 19.36* |
||||
| C++23 feature |
Paper(s) |
GCC libstdc++ |
Clang libc++ |
MSVC STL |
Apple Clang* |