C++ compiler support
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The following tables present compiler support for new C++ features. These include accepted revisions to the standard, as well as various technical specifications:
Contents |
[edit] Notes
* - 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.
[edit] C++26 features
Note that this list may change, as the draft C++26/2c standard evolves.
[edit] C++26 core language features
C++26 feature |
Paper(s) |
GCC |
Clang |
MSVC |
Apple Clang |
EDG eccp |
Intel C++ |
Nvidia HPC C++ (ex PGI)* |
Nvidia nvcc |
Cray |
|
---|---|---|---|---|---|---|---|---|---|---|---|
DR98: Removing undefined behavior from lexing | P2621R3 | Yes | 3.3 | ||||||||
DR98: Making non-encodable string literals ill-formed | P1854R4 | 14 | 14 | ||||||||
Unevaluated strings | P2361R6 | 14 | 17 (partial)* 18 |
||||||||
Adding @ , $ , and ` to the basic character set
|
P2558R2 | 15 | Yes | ||||||||
constexpr cast from void* | P2738R1 | 14 | 17 | ||||||||
DR20: On the ignorability of standard attributes | P2552R3 | Yes | |||||||||
DR11: Static storage for braced initializers | P2752R3 | 14 | |||||||||
User-generated static_assert messages | P2741R3 | 14 | 17 | ||||||||
Placeholder variables with no name | P2169R4 | 14 | 18 | ||||||||
Pack indexing | P2662R3 | 15 | 19 | ||||||||
Removing deprecated arithmetic conversion on enumerations | P2864R2 | 14 | 18 | ||||||||
DR11/20: Template parameter initialization | P2308R1 | 18 | |||||||||
Disallow binding a returned reference to a temporary | P2748R5 | 14 | 19 | ||||||||
Attributes for structured bindings | P0609R3 | 15 | 19 | ||||||||
Erroneous behavior for uninitialized reads | P2795R5 | ||||||||||
= delete("reason"); | P2573R2 | 15 | 19 | ||||||||
Variadic friends | P2893R3 | 15 | 20 | ||||||||
DR98: Clarifying rules for brace elision in aggregate initialization | P3106R1 | Yes | 17 | ||||||||
DR20: Disallow module declarations to be macros | P3034R1 | 15 | |||||||||
DR11: Trivial infinite loops are not undefined behavior | P2809R3 | 14 | 19 | ||||||||
constexpr placement new | P2747R2 | 15 | 20 | ||||||||
Structured binding declaration as a condition | P0963R3 | 15 | 6 (partial)* | ||||||||
Ordering of constraints involving fold expressions | P2963R3 | 19 | |||||||||
Deleting a pointer to an incomplete type should be ill-formed | P3144R2 | 15 | 19 | ||||||||
Structured bindings can introduce a pack | P1061R10 | ||||||||||
constexpr structured bindings and references to constexpr variables | P2686R5 | ||||||||||
constexpr exceptions | P3068R6 | ||||||||||
Oxford variadic comma | P3176R1 | 15 | 20 | ||||||||
Removing deprecated array comparisons | P2865R5 | 15 | |||||||||
C++26 feature |
Paper(s) |
GCC |
Clang |
MSVC |
Apple Clang |
EDG eccp |
Intel C++ |
Nvidia HPC C++ (ex PGI)* |
Nvidia nvcc |
Cray |
[edit] C++26 library features
C++26 feature |
Paper(s) |
GCC libstdc++ |
Clang libc++ |
MSVC STL |
Apple Clang* |
|
---|---|---|---|---|---|---|
Testing for success or failure of <charconv> functions | P2497R0 | 14 | 18 | |||
std::text_encoding: text encodings identification | P1885R12 P2862R1 |
14 | ||||
Arithmetic overloads of std::to_string and std::to_wstring use std::format | P2587R3 | 14 | ||||
Type checking format args | P2757R3 | 15 | ||||
Formatting pointers | P2510R3 | 14* | 17* | 19.40** | ||
Hashing support for std::chrono value classes | P2592R3 | |||||
Read-Copy Update | P2545R4 | |||||
Hazard Pointers | P2530R3 | |||||
ADL-proof std::projected | P2538R1 | 14* | 18* | 19.38** | ||
constexpr stable sorting | P2562R1 | |||||
Member visit
|
P2637R3 | 15 | 18 (partial)* 19 |
|||
std::is_within_lifetime | P2641R4 | |||||
Extending associative containers with the remaining heterogeneous overloads | P2363R5 | |||||
Enabling the use of std::weak_ptr as keys in unordered associative containers | P1901R2 | |||||
Native handles in file streams | P1759R6 | 14 | 18 | |||
Interfacing string streams with std::string_view | P2495R3 | 19 | ||||
Interfacing std::bitset with std::string_view | P2697R1 | 18 | ||||
More constexpr for <cmath> and <complex> | P1383R2 | 4.6 (partial)* | ||||
Adding the new 2022 SI prefixes on ratios: std::quecto, std::ronto, std::ronna, and std::quetta | P2734R0 | 14 | 17 | |||
std::function_ref: type-erased callable reference | P0792R14 | |||||
std::copyable_function | P2548R6 | |||||
std::bind_front, std::bind_back, and std::not_fn to NTTP callables | P2714R1 | |||||
std::submdspan() | P2630R4 P3355R1 |
|||||
Freestanding Language: Optional ::operator new | P2013R5 | N/A | ||||
Saturation Arithmetic | P0543R3 | 14 | 18 | |||
<debugging>: Debugging Support | P2546R5 P2810R3 |
|||||
<linalg>: A free function linear algebra interface based on the BLAS | P1673R13 P3050R2 P3222R0 |
|||||
Making assert() macro user friendly | P2264R7 | |||||
Runtime format strings | P2918R2 | 14 | 18 | |||
std::span over an initializer list | P2447R6 | 18 | ||||
std::span::at() | P2821R5 | 14 | 18 | |||
Added tuple protocol to std::complex | P2819R2 | 19 | ||||
A new specification for std::generate_canonical | P0952R2 | 19.42* | ||||
Removing deprecated typedef std::allocator::is_always_equal | P2868R3 | 15 | 18 | |||
Removing function overload of std::basic_string::reserve() that takes no argument | P2870R3 | 18 | ||||
Removing deprecated Unicode conversion facets (<codecvt>) | P2871R3 | 18 | ||||
Freestanding: removing std::strtok | P2937R0 | 14 | 19.40* | |||
Freestanding Library: Partial Classes | P2407R5 | 14 | 19.42* | |||
Freestanding Library: inout expected span | P2833R2 | 14 | 19.42* | |||
DR23: std::basic_const_iterator should follow its underlying type’s convertibility | P2836R1 P2950R0 |
14 | 19.40* | |||
DR20: std::make_format_args now accepts only lvalue references instead of forwarding references | P2905R2 | 14 | 18 | 19.40* | ||
DR20: Fix formatting of code units as integers | P2909R4 | 13.3 | 18 | 19.40* | ||
views::concat | P2542R8 | 15 | ||||
Concatenation of strings and string views | P2591R5 | 15 | 19 | |||
Enabling list-initialization for algorithms | P2248R8 P3217R0 |
15 | ||||
std::ranges::generate_random | P1068R11 | |||||
Comparisons for std::reference_wrapper | P2944R3 | 14 | 19 (partial)* | |||
Padded mdspan layouts | P2642R6 | |||||
New CTAD for std::span and std::mdspan with integral constants | P3029R1 | 19 | ||||
Atomic maximum and minimum | P0493R5 | |||||
std::formatter<std::filesystem::path> | P2845R8 | |||||
Printing Blank Lines with std::println() | P3142R0 | 14* | 19* | 19.41** | ||
Undeprecate std::polymorphic_allocator::destroy | P2875R4 | 15 | 19.41* | |||
Removing deprecated strstreams | P2867R2 | 19 | ||||
Removing deprecated std::shared_ptr Atomic Access APIs | P2869R4 | |||||
Removing std::wstring_convert | P2872R3 | 19 | ||||
DR23: Permit an efficient implementation of std::print | P3107R5 P3235R3 |
19.43* | ||||
Execution library | P2300R10 P3396R0 |
|||||
std::inplace_vector: dynamically-resizable vector with fixed capacity | P0843R14 | |||||
std::philox_engine: counter-based random number engine | P2075R6 | |||||
std::optional range support | P3168R2 | |||||
std::is_virtual_base_of: type trait for detecting virtual base classes | P2985R0 | 15 | 20 | |||
std::dims for std::mdspan | P2389R2 | 19 | ||||
DR11: Formal specification of the type of std::ignore | P2968R2 | 15 | 19 | 19.42* | ||
DR20: Removing the common reference requirement from the indirectly invocable concepts | P2997R1 | 15 | 19 | 19.42* | ||
Deprecating std::is_trivial and std::is_trivial_v | P3247R2 | 15 | ||||
DR20: Algorithm function objects | P3136R1 | Yes | Yes | 19.39* | Yes | |
views::cache_latest | P3138R5 | |||||
Constraining std::expected equality operators | P3379R1 | 15 | ||||
std::aligned_accessor | P2897R7 | |||||
std::atomic_ref::address() | P2835R7 | |||||
DR11/20: cv-qualified types in std::atomic and std::atomic_ref | P3323R1 | |||||
constexpr std::atomic and std::atomic_ref | P3309R3 | |||||
constexpr for specialized memory algorithms | P3508R0 P3369R0 |
|||||
Added new library headers from C23 | P3370R1 | |||||
std::simd: data-parallel types | P1928R15 | |||||
A utility for creating execution environments | P3325R5 | |||||
constexpr for exception types, e.g. std::bad_alloc, std::bad_cast etc. | P3068R6 | |||||
C++26 feature |
Paper(s) |
GCC libstdc++ |
Clang libc++ |
MSVC STL |
Apple Clang* |
[edit] C++23 features
[edit] 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 | P0330R8 | 11 | 13 | 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 | 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 | 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) | P0847R7 | 14 | 18 19* |
19.32* (partial)* |
6.3 | 22.5 | |||||
auto(x) and auto{x}
|
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 | 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 | 2022.2 | Yes | |||||
Extend init-statement (of for loop) to allow alias-declaration
|
P2360R0 | 12 | 14 | 14.0.0* | 2022.2 | ||||||
Multidimensional subscript operator | 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* | 2023.2 | ||||||
Labels at the end of compound statements | P2324R2 | 13 | 16 | 6.5 | 2023.2 | 23.9 | |||||
Delimited escape sequences | P2290R3 | 13 | 15 | 15.0.0* | 2023.2 | ||||||
Named universal character escapes | P2071R2 | 13 | 15 | 15.0.0* | 6.7 | 2023.2 | |||||
Relaxing some constexpr restrictions | P2448R2 | 13 | 17 (partial) 19 |
2024.0 (partial) | |||||||
Simpler implicit move | P2266R3 | 13 | 13 | 2022.2 | |||||||
static operator() | P1169R4 | 13 | 16 | 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[] | P2589R1 | 13 | 16 | 6.7 | 2023.2 | ||||||
Permitting static constexpr variables in constexpr functions | P2647R1 | 13 | 16 | 2023.2 | |||||||
Extending the lifetime of temporaries in range-based for loop initializer | P2718R0 | 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 | P2564R0 | 14 | 17 | 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* | 2023.2 | ||||||
DR11: Using unknown pointers and references in constant expressions | P2280R4 | 14 | |||||||||
DR20: The Equality Operator You Are Looking For | P2468R2 | 13 | 16 | 2023.2 | |||||||
DR20: char8_t Compatibility and Portability Fix | P2513R4 | 13 | 16 | 19.34* | 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 |
[edit] C++23 library features
C++23 feature |
Paper(s) |
GCC libstdc++ |
Clang libc++ |
MSVC STL |
Apple Clang* |
|
---|---|---|---|---|---|---|
Stacktrace library | P0881R7 P2301R1 |
12 (partial)* 14* |
19.34* | |||
<stdatomic.h> | P0943R6 | 12 | 15 | 19.31* | 14.0.3* | |
std::is_scoped_enum | P1048R1 | 11 | 12 | 19.30* | 13.0.0* | |
std::basic_string::contains(), std::basic_string_view::contains() | P1679R3 | 11 | 12 | 19.30* | 13.0.0* | |
std::to_underlying | 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 | P0401R6 | 15 | 19.30* | 14.0.3* | ||
<spanstream>: string-stream with std::span-based buffer | P0448R4 | 12 | 19.31* | |||
std::out_ptr(), std::inout_ptr() | P1132R8 | 14 | 19 | 19.30* | ||
constexpr type_info::operator==()
|
P1328R1 | 12 | 17 | 19.33** 19.34* |
15.0.0* | |
Iterator pair constructors for std::stack and std::queue | 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() | P1659R3 | 17 (partial)* 18 |
19.31* | |||
Prohibiting std::basic_string and std::basic_string_view construction from nullptr | P2166R1 | 12 | 13 | 19.30* | 13.1.6* | |
std::invoke_r() | 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 | P2321R2 | 13 | 15 (partial)* | 19.33*(partial)*** 19.37* |
14.0.3* | |
Heterogeneous erasure overloads for associative containers | P2077R3 | 19.32* | ||||
std::byteswap() | 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() | P1072R10 | 12 | 14 | 19.31* | 14.0.3* | |
Monadic operations for std::optional | P0798R8 | 12 | 14 | 19.32* | 14.0.3* | |
std::move_only_function | 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> | P0323R12 P2549R1 |
12 | 16 | 19.33* | 15.0.0* | |
constexpr for <cmath> and <cstdlib> | P0533R9 | 4.6 (partial)* | ||||
std::unreachable() | 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 | P2255R2 | 13 (partial)* 14 |
19 | |||
constexpr std::unique_ptr | P2273R3 | 12 | 16 | 19.33* | 15.0.0* | |
Constructing containers and strings from ranges with ranges::to(), tagged constructors, insert and assign member functions | P1206R7 | 14 (partial)* | 17 | 19.34* | 15.0.0* | |
Pipe support for user-defined range adaptors (ranges::range_adaptor_closure, std::bind_back) | P2387R3 | 13 (partial)* 14 |
19 | 19.34* | ||
ranges::iota(), ranges::shift_left(), and ranges::shift_right() | P2440R1 | 13 (partial)* | 19.34* | |||
views::join_with | P2441R2 | 13 | 19.34* | |||
views::chunk and views::slide | P2442R1 | 13 | 19.33* | |||
views::chunk_by | P2443R1 | 13 | 18 | 19.33* | ||
std::mdspan: a non-owning multidimensional array reference | P0009R18 P2599R2 P2604R0 P2613R1 P2763R1 |
17 (partial)* 18 |
19.39* | 15.0.0* | ||
<flat_map> | P0429R9 | 20 (partial)* | ||||
<flat_set> | P1222R4 | |||||
ranges::find_last(), ranges::find_last_if(), and ranges::find_last_if_not() | P1223R5 | 13 | 19 | 19.36* | ||
Freestanding Library: Easy <utility>, <ranges>, and <iterator> | P1642R11 | 13* | N/A | |||
views::stride | P1899R3 | 13 | 19.34* | |||
Compatibility between std::tuple and tuple-like objects | P2165R4 | 14 | 2.9 (partial)* | 19.36* (partial)* 19.37* |
partial* | |
Rectifying constant iterators, sentinels, and ranges. views::as_const | P2278R4 | 13 | 19.35* (partial)* 19.36* |
|||
Formatting Ranges | P2286R8 | 16 | 19.37*(partial)* 19.39*(partial)* 19.41*(partial)* 19.42* |
15.0.0* | ||
Improve default container formatting | P2585R1 | 16 (partial)* 17 |
19.42* | 15.0.0* | ||
Formatted output library <print> | P2093R14 P2539R4 |
14 | 17 (partial)* 18 |
19.37* | 15.0.0** | |
Formatting std::thread::id and std::stacktrace | P2693R1 | 14 | 17 (partial)* | 19.38* | 15.0.0* | |
constexpr for integral overloads of std::to_chars() and std::from_chars().
|
P2291R3 | 13 | 16 | 19.34* | 15.0.0* | |
ranges::contains() and ranges::contains_subrange() | P2302R4 | 13 | 19 | 19.34* | ||
Ranges fold algorithms | P2322R6 | 13 | 19.35* | |||
views::cartesian_product | P2374R4 P2540R1 |
13 | 19.37* | |||
Adding move-only types support for comparison concepts (equality_comparable , totally_ordered , three_way_comparable )
|
P2404R3 | 19.36* | ||||
Ranges iterators as inputs to non-ranges algorithms | P2408R5 | 19.34* | ||||
constexpr std::bitset | P2417R2 | 13 | 16 | 19.34* | 15.0.0* | |
basic_string::substr() &&
|
P2438R2 | 16 | 19.34* | 15.0.0* | ||
views::as_rvalue | P2446R2 | 13 | 16 | 19.34* | 15.0.0* | |
Standard Library Modules | P2465R3 | 15* | 17 (partial)* | 19.35* (partial)* 19.36* |
||
std::forward_like() | P2445R1 | 14 | 16 | 19.34* | 15.0.0* | |
Support exclusive mode for std::fstream | P2467R1 | 12 | 18 | 19.36* | ||
views::repeat | P2474R2 | 13 | 17 | 19.36* | 15.0.0* | |
Relaxing range adaptors to allow for move-only types | 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 | P2502R2 P2787R0 |
14 | 19.43* | |||
Add a conditional noexcept specification to std::apply | P2517R1 | 10 | 18 | 19.34* | ||
Explicit lifetime management (std::start_lifetime_as) | P2590R2 P2679R2 |
|||||
Clarify handling of encodings in localized formatting of chrono types | P2419R2 | 15* | 19.34** | |||
std::move_iterator should not always be input_iterator
|
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 | P2505R5 | 13 | 17 | 19.36* | 15.0.0* | |
views::enumerate | P2164R9 | 13 | 19.37* | |||
std::is_implicit_lifetime | P2674R1 | 20 | ||||
std::common_reference_t of std::reference_wrapper should be a reference type | P2655R3 | 19.37* | ||||
Disallowing user specialization of std::allocator_traits | P2652R2 | 19 | 19.37* | |||
Deprecating std::numeric_limits::has_denorm | P2614R2 | 18 | 19.37* | |||
Making Multi-Param Constructors Of views explicit | P2711R1 | 17 (partial)* | 19.36** | 15.0.0* | ||
DR20: Relaxing Ranges Just A Smidge | 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 | 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
|
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 | 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
|
P2415R2 | 12 | 14 | 19.31* | 14.0.3* | |
DR20: Fixing locale handling in chrono formatters | P2372R3 | 13 | 19.31* | |||
DR20: Cleaning up integer-class types | P2393R1 | 19.32* | ||||
DR20: std::format() improvements | 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 | 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 | P2588R3 | 19.28 (16.8)** 19.36* |
||||
C++23 feature |
Paper(s) |
GCC libstdc++ |
Clang libc++ |
MSVC STL |
Apple Clang* |
[edit] C++20 features
[edit] C++20 core language features
C++20 feature |
Paper(s) |
GCC |
Clang |
MSVC |
Apple Clang |
EDG eccp |
Intel C++ |
Nvidia HPC C++ (ex PGI)* |
Nvidia nvcc |
Cray |
|
---|---|---|---|---|---|---|---|---|---|---|---|
Allow Lambda capture [=, this]
|
P0409R2 | 8 | 6 | 19.22* | 10.0.0* | 5.1 | 2021.1 | 20.7 | 12.0 | 11.0 | |
__VA_OPT__
|
P0306R4 P1042R1 |
8 (partial)* 10 (partial)* 12 |
9 | 19.25* | 11.0.3* | 5.1 | 2021.1 | 20.7 | 12.0 | 11.0 | |
Designated initializers | P0329R4 | 4.7 (partial)* 8 |
3.0 (partial)* 10 |
19.21* | 12.0.0* | 5.1 | 2021.1 | 20.7 | 12.0 | 11.0 | |
template-parameter-list for generic lambdas | P0428R2 | 8 | 9 | 19.22* | 11.0.0* | 5.1 | 2021.1 | 20.7 | 12.0 | 11.0 | |
Default member initializers for bit-fields | P0683R1 | 8 | 6 | 19.25* | 10.0.0* | 5.1 | 2021.1 | 20.7 | 12.0 | 11.0 | |
Initializer list constructors in class template argument deduction | P0702R1 | 8 | 6 | 19.14* | Yes | 5.0 | 2021.1 | 20.7 | 12.0 | 11.0 | |
const& -qualified pointers to members
|
P0704R1 | 8 | 6 | 19.0 (2015)* | 10.0.0* | 5.1 | 2021.1 | 20.7 | 12.0 | 11.0 | |
Concepts | P0734R0 | 6 (TS only) 10 |
10 | 19.23* (partial)* 19.30* |
12.0.0* (partial) | 6.1 | 2023.1* | 20.11 | 12.0 | 11.0 | |
Lambdas in unevaluated contexts | P0315R4 | 9 | 13 (partial)* 14 (partial)* 17 |
19.28 (16.8)* | 13.1.6* (partial) | 6.2 | 2023.1 (partial) 2024.0 |
20.7 | 12.0 | ||
Three-way comparison operator | P0515R3 | 10 | 8 (partial) 10 |
19.20* | 12.0.0* | 5.1 | 2021.1 | 20.7 | 12.0 | 11.0 | |
DR11: Simplifying implicit lambda capture | P0588R1 | 8 | 19.24* | 5.1 | 2021.1 | 20.7 | 12.0 | ||||
init-statements for range-based for | P0614R1 | 9 | 8 | 19.25* | 11.0.0* | 6.0 | 2021.7 | 20.11 | 12.0 | 11.0 | |
Default constructible and assignable stateless lambdas | P0624R2 | 9 | 8 | 19.22* | 10.0.1* | 5.1 | 2021.1 | 20.7 | 12.0 | 11.0 | |
Type mismatch of defaulted special member functions | P0641R2 | 9 (partial)* | 8 | 19.0 (2015)* (partial)* | 10.0.1* | 5.1 | 2021.1 | 20.7 | 12.0 | 11.0 | |
Access checking on specializations | P0692R1 | Yes | 8 (partial) 14 |
19.26* | 14.0.0* | 5.1 | 2021.1 | 20.7 | 12.0 | ||
ADL and function templates that are not visible | P0846R0 | 9 | 9 | 19.21* | 11.0.3* | 5.1 | 2021.1 | 20.7 | 12.0 | 11.0 | |
DR11: Specify when constexpr function definitions are needed for constant evaluation
|
P0859R0 | 5.2 (partial)* 9 |
8 | 19.27* (partial)* 19.31** |
11.0.0* | 12.0 | 11.0 | ||||
Attributes [[likely]] and [[unlikely]]
|
P0479R5 | 9 | 12 | 19.26* | 13.0.0* | 5.1 | 2021.7 | 20.7 | 12.0 | ||
Make typename more optional | P0634R3 | 9 | 16 | 19.29 (16.10)* | 5.1 | 2023.1 | 20.7 | 12.0 | |||
Pack-expansions in lambda init-captures | P0780R2 | 9 | 9 | 19.22* | 11.0.3* | 6.1 | 2021.7 | 20.11 | 12.0 | 11.0 | |
Attribute [[no_unique_address]]
|
P0840R2 | 9 | 9 | 19.28 (16.9)** | 11.0.3* | 5.1 | 2021.1 | 20.7 | 12.0 | 11.0 | |
Conditionally Trivial Special Member Functions | P0848R3 | 10 | 16 | 19.28 (16.8)* | 6.1 | 2021.7 | 20.11 | 12.0 | |||
DR17: Relaxing the structured bindings customization point finding rules | P0961R1 | 8 | 8 | 19.21* | 10.0.1* | 5.1 | 2021.1 | 20.7 | 12.0 | 11.0 | |
DR11: Relaxing the range-for loop customization point finding rules | P0962R1 | 8 | 8 | 19.25* | 11.0.0* | 5.1 | 2021.1 | 20.7 | 12.0 | 11.0 | |
DR17: Allow structured bindings to accessible members | P0969R0 | 8 | 8 | 19.21* | 10.0.1* | 5.1 | 2021.1 | 20.7 | 12.0 | 11.0 | |
Destroying operator delete
|
P0722R3 | 9 | 6 | 19.27* | 10.0.0* | 6.1 | 2023.1 | 20.11 | 12.0 | 11.0 | |
Class types in Non-type template parameters | P0732R2 | 9 | 12 (partial) | 19.26*(partial)* 19.28 (16.9)* |
13.0.0* (partial) | 6.2 | 2023.1 (partial) | 21.3 | 12.0 | ||
Deprecate implicit capture of this via [=]
|
P0806R2 | 9 | 7 | 19.22* | 10.0.1* | 5.1 | 20.7 | 12.0 | 11.0 | ||
explicit(bool) | P0892R2 | 9 | 9 | 19.24* | 11.0.3* | 5.1 | 2021.1 | 20.7 | 12.0 | 11.0 | |
Integrating feature-test macros | P0941R2 | 5 | 3.4 | 19.15* (partial) 19.20* |
Yes | 5.0 | 2021.1 | 20.7 | 12.0 | 11.0 | |
Prohibit aggregates with user-declared constructors | P1008R1 | 9 | 8 | 19.20* | 10.0.1* | 5.1 | 2021.1 | 20.7 | 12.0 | 11.0 | |
constexpr virtual function
|
P1064R0 | 9 | 9 | 19.28 (16.9)* | 11.0.3* | 5.1 | 2021.1 | 20.7 | 12.0 | 11.0 | |
Consistency improvements for comparisons | P1120R0 | 10 | 8 (partial) 10 |
19.22* | 12.0.0* | 5.1 | 2023.1 | 20.7 | 12.0 | 11.0 | |
char8_t
|
P0482R6 | 9 | 7* | 19.22* | 10.0.0* | 5.1 | 2021.1 | 20.7 | 12.0 | 11.0 | |
std::is_constant_evaluated() | P0595R2 | 9 | 9 | 19.25* | 11.0.3* | 5.1 | 19.1 | 21.1 | 12.0 | 11.0 | |
constexpr try -catch blocks
|
P1002R1 | 9 | 8 | 19.25* | 10.0.1* | 5.1 | 2023.1 | 20.7 | 12.0 | 11.0 | |
Immediate functions (consteval )
|
P1073R3 | 10 (partial)* 11 |
11 (partial) 14 (partial)* 17 |
19.28 (16.8)* (partial)* 19.29 (16.10)* |
11.0.3* (partial) 15.0.0* |
5.1 | 2021.1 | 20.7 | 12.0 | ||
Nested inline namespaces | P1094R2 | 9 | 8 | 19.27* | 10.0.1* | 5.1 | 2021.1 | 20.7 | 12.0 | 11.0 | |
Yet another approach for constrained declarations | P1141R2 | 10 | 10 | 19.26* (partial) 19.28 (16.9)* |
12.0.5* | 6.1 | 2023.1 | 20.11 | 12.0 | 11.0 | |
Signed integers are two's complement | P1236R1 | 9 | 9 | Yes | 11.0.3* | N/A | 2023.1* | yes* | 12.0 | 11.0 | |
dynamic_cast and polymorphic typeid in constant expressions | P1327R1 | 10 | 9 | 19.29 (16.10)* | 11.0.3* | 5.1 | 2021.1 | 20.7 | 12.0 | 11.0 | |
Changing the active member of a union inside constexpr
|
P1330R0 | 9 | 9 | 19.10* | 11.0.3* | 5.1 | 2021.1 | 20.7 | 12.0 | 11.0 | |
Coroutines | P0912R5 | 10 | 8 (partial) 17 (partial)* |
19.0 (2015)* (partial) 19.10* (TS only) 19.28 (16.8)* |
10.0.1* (partial) | 5.1 | 2021.1 | 23.3* | 12.0 (host code only) | ||
Parenthesized initialization of aggregates | P0960R3 | 10 | 16 | 19.28 (16.8)* | 5.1 | 2021.1 | 20.7 | 12.0 | |||
DR11: Array size deduction in new -expressions
|
P1009R2 | 11 | 9 | 19.27* | 11.0.3* | 5.1 | 2021.1 | 20.7 | 12.0 | 11.0 | |
Modules | P1103R3 | 11 (partial) | 8 (partial) | 19.0 (2015)* (partial) 19.10* (TS only) 19.28 (16.8)* |
10.0.1* (partial) | 2023.1 (partial) | |||||
Stronger Unicode requirements | P1041R4 P1139R2 |
10 | Yes | 19.0 (2015)* (P1041R4) 19.26* (P1139R2) |
Yes | N/A | 2023.1* | Yes | 12.0 | 11.0 | |
<=> != ==
|
P1185R2 | 10 | 10 | 19.22* | 12.0.0* | 5.1 | 2021.1 | 20.7 | 12.0 | 11.0 | |
DR11: Explicitly defaulted functions with different exception specifications | P1286R2 | 10 | 9 | 19.28 (16.8)* | 11.0.3* | 5.1 | 2021.1 | 20.7 | 12.0 | 11.0 | |
Lambda capture and storage class specifiers of structured bindings | P1091R3 P1381R1 |
10 | 8 (partial) 16 |
19.11*(P1381R1) 19.24*(P1091R3) |
10.0.1* (partial) | 5.1 | 2021.1 | 20.7 | 12.0 | ||
Permit conversions to arrays of unknown bound | P0388R4 | 10 | 14 | 19.27* | 14.0.0* | 6.0 | 2021.5 | 20.11 | 12.0 | ||
constexpr container operations
|
P0784R7 | 10 | 10 | 19.28 (16.9)* | 12.0.0* | 6.0 | 2021.5 | 20.11 | 12.0 | 11.0 | |
Deprecating some uses of volatile
|
P1152R4 | 10 | 10 | 19.27* | 12.0.0* | 6.0 | 2021.5 | 20.11 | 12.0 | 11.0 | |
constinit | P1143R2 | 10 | 10 | 19.29 (16.10)* | 12.0.0* | 6.1 | 2021.7 | 20.11 | 12.0 | 11.0 | |
Deprecate comma operator in subscripts | P1161R3 | 10 | 9 | 19.25* | 11.0.3* | 6.0 | 2021.7 | 20.11 | 12.0 | 11.0 | |
[[nodiscard]] with message
|
P1301R4 | 10 | 9 | 19.25* | 11.0.3* | 6.0 | 2021.5 | 20.11 | 12.0 | 11.0 | |
Trivial default initialization in constexpr functions
|
P1331R2 | 10 | 10 | 19.27* | 12.0.0* | 6.1 | 2021.7 | 20.11 | 12.0 | 11.0 | |
Unevaluated asm -declaration in constexpr functions
|
P1668R1 | 10 | 10 | 19.28 (16.9)* | 12.0.0* | 6.1 | 2021.7 | 20.11 | 12.0 | 11.0 | |
using enum | P1099R5 | 11 | 13 | 19.24* | 13.1.6* | 6.3 | 2023.1 | 22.5 | 12.0 | ||
Synthesizing Three-way comparison for specified comparison category | P1186R3 | 11 | 10 | 19.24* | 12.0.0* | 6.0 | 2021.5 | 20.11 | 12.0 | 11.0 | |
DR17: [[nodiscard]] for constructors
|
P1771R1 | 10 | 9 | 19.24* | 11.0.3* | 6.0 | 2021.5 | 20.11 | 12.0 | 11.0 | |
class template argument deduction for alias templates | P1814R0 | 10 | 19 | 19.27* | 6.5 | 23.9 | 12.0 | ||||
class template argument deduction for aggregates | P1816R0 P2082R1 |
10(P1816R0) 11(P2082R1) |
17 | 19.27* | 6.3 | 2023.1 (partial)* 2024.1 |
23.3 | 12.0 | |||
DR11: Implicit move for more local objects and rvalue references | P1825R0 | 11* | 13 | 19.24* | 13.1.6* | 6.0 | 2021.5 | 20.11 | 12.0 | ||
Allow defaulting comparisons by value | P1946R0 | 10 | 10 | 19.25* | 12.0.0* | 6.1 | 2021.7 | 20.11 | 12.0 | 11.0 | |
Remove std::weak_equality and std::strong_equality
|
P1959R0 | 10 | 10 | 19.25* | 12.0.0* | 6.1 | 2021.7 | 20.11 | 12.0 | 11.0 | |
Inconsistencies with non-type template parameters | P1907R1 | 10 (partial) 11 |
18 (partial)* | 19.26* | 13.1.6* (partial) | 6.2 | 2023.1 (partial) | 21.3 | 12.0 | ||
DR98: Pseudo-destructors end object lifetimes | P0593R6 | 11 | 11 | Yes | 12.0.5* | N/A | 2023.1* | Yes | 12.0 | 11.0 | |
DR11: Converting from T* to bool should be considered narrowing
|
P1957R2 | 10* 11* |
11 | 19.27* | 12.0.5* | 6.1 | 12.0 | 11.0 | |||
C++20 feature |
Paper(s) |
GCC |
Clang |
MSVC |
Apple Clang |
EDG eccp |
Intel C++ |
Nvidia HPC C++ (ex PGI)* |
Nvidia nvcc |
Cray |
[edit] C++20 library features
C++20 feature |
Paper(s) |
GCC libstdc++ |
Clang libc++ |
MSVC STL |
Apple Clang* |
|
---|---|---|---|---|---|---|
std::endian | P0463R1 | 8 | 7 | 19.22* | 10.0.0* | |
Extending std::make_shared() to support arrays | P0674R1 | 12 | 15 | 19.27* | 14.0.3* | |
Floating-point atomic | P0020R6 | 10 | 18 | 19.22* | ||
Synchronized buffered (std::basic_osyncstream) | P0053R7 | 11 | 18 | 19.29 (16.10)* | ||
constexpr for <algorithm> and <utility>
|
P0202R3 | 10 | 8 (partial) 12 |
19.26* | 10.0.1* (partial) 13.0.0* | |
More constexpr for <complex>
|
P0415R1 | 9 | 7 (partial) 16 |
19.27* | 10.0.0* (partial) 15.0.0* | |
Make std::memory_order a scoped enumeration | P0439R0 | 9 | 9 | 19.25* | 11.0.3* | |
String prefix and suffix checking: string(_view) ::starts_with/ends_with | P0457R2 | 9 | 6 | 19.21* | 10.0.0* | |
Library support for operator<=> <compare>
|
P0768R1 | 10 | 7 (partial) 12 (partial)* 17 |
19.20* (partial) 19.28 (16.9)* |
13.0.0* | |
std::remove_cvref | P0550R2 | 9 | 6 | 19.20* | 10.0.0* | |
[[nodiscard]] in the standard library
|
P0600R1 | 9 | 7 (partial) 16 |
19.13* (partial) 19.22* |
10.0.0* (partial) 15.0.0* | |
Using std::move in numeric algorithms
|
P0616R0 | 9 | 12 | 19.23* | 13.0.0* | |
Utility to convert a pointer to a raw pointer | P0653R2 | 8 | 6 | 19.22* | Yes | |
Atomic std::shared_ptr and std::weak_ptr | P0718R2 | 12 | 19.27* | |||
std::span | P0122R7 | 10 | 7 | 19.26* | 10.0.0* | |
Calendar and timezone | P0355R7 | 11 (partial)* 13 (partial)* 14 |
7 (partial) 19 (partial)* |
19.29 (16.10)* | 10.0.0* (partial) | |
<version> | P0754R2 | 9 | 7 | 19.22* | 10.0.0* | |
Comparing unordered containers | P0809R0 | Yes | Yes | 16.0* | Yes | |
ConstexprIterator requirements | P0858R0 | 9 | 12 | 19.11* | 13.0.0* | |
std::basic_string::reserve() should not shrink | P0966R1 | 11 | 8 | 19.25* | 10.0.1* | |
Atomic Compare-And-Exchange with padding bits | P0528R3 | 13 | 19.28 (16.8)* | |||
std::atomic_ref | P0019R8 | 10 | 19 | 19.28 (16.8)* | ||
contains() member function of associative containers, e.g. std::map::contains()
|
P0458R2 | 9 | 13 | 19.21* | 13.1.6* | |
DR11: Guaranteed copy elision for piecewise construction | P0475R1 | 9 | Yes | 19.29 (16.10)* | Yes | |
std::bit_cast() | P0476R2 | 11 | 14 | 19.27* | 14.0.3* | |
Integral power-of-2 operations:
std::bit_ceil(), std::bit_floor(), std::bit_width(), std::has_single_bit() |
P0556R3 P1956R1 | 9 (P0556R3) 10 (P1956R1) |
9 (P0556R3) 12 (P1956R1) |
19.25* (P0556R3)* 19.27* (P1956R1)* 19.28 (16.8)* |
11.0.3* (P0556R3) 13.0.0* (P1956R1) | |
Improving the return value of erase-like algorithms | P0646R1 | 9 | 10 | 19.21* | 12.0.0* | |
std::destroying_delete | P0722R3 | 9 | 9 | 19.27* | 11.0.3* | |
std::is_nothrow_convertible | P0758R1 | 9 | 9 | 19.23* | 11.0.3* | |
Add std::shift_left/right to <algorithm> | P0769R2 | 10 | 12 | 19.21* | 13.0.0* | |
Constexpr for std::swap() and swap related functions
|
P0879R0 | 10 | 13 | 19.26* | 13.1.6* | |
std::type_identity | P0887R1 | 9 | 8 | 19.21* | 10.0.1* | |
Concepts library | P0898R3 | 10 | 13 | 19.23* | 13.1.6* | |
constexpr comparison operators for std::array
|
P1023R0 | 10 | 8 | 19.27* | 10.0.1* | |
std::unwrap_ref_decay and std::unwrap_reference
|
P0318R1 | 9 | 8 | 19.21* | 10.0.1* | |
std::bind_front() | P0356R5 | 9 | 13 | 19.25* | 13.1.6* | |
std::reference_wrapper for incomplete types | P0357R3 | 9 | 8 | 19.26* | 10.0.1* | |
Fixing operator>>(basic_istream&, CharT*) | P0487R1 | 11 | 8 | 19.23* | 10.0.1* | |
Library support for char8_t
|
P0482R6 | 9 | 8 (partial) 16 |
19.22* | 10.0.1* (partial) 15.0.0* | |
Utility functions to implement uses-allocator construction | P0591R4 | 9 | 16 | 19.29 (16.10)* | 15.0.0* | |
DR17: std::variant and std::optional should propagate copy/move triviality | P0602R4 | 8.3 | 8 | 19.11* | 10.0.1* | |
DR17: A sane std::variant converting constructor | P0608R3 | 10 | 9 | 19.29 (16.10)** 19.42** |
11.0.3* | |
std::function's move constructor should be noexcept | P0771R1 | 7.2 | 6 | 19.22* | Yes | |
The One Ranges Proposal | P0896R4 | 10 | 13 (partial) 15* |
19.29 (16.10)* | 14.0.3* | |
Heterogeneous lookup for unordered containers | P0919R3 P1690R1 | 11 | 12 | 19.23* (P0919R3) 19.25* (P1690R1) |
13.0.0* | |
<chrono> zero() , min() , and max() should be noexcept
|
P0972R0 | 9 | 8 | 19.14* | 10.0.1* | |
constexpr in std::pointer_traits
|
P1006R1 | 9 | 8 | 19.26* | 10.0.1* | |
std::assume_aligned() | P1007R3 | 9* 11 |
15 | 19.28 (16.9)* | 14.0.3* | |
Smart pointer creation with default initialization (e.g. make_unique_for_overwrite) | P1020R1 P1973R1 |
11 (unique_ptr) 12 (shared_ptr) |
16 | 19.28 (16.9)* | 15.0.0* | |
Misc constexpr bits
|
P1032R1 | 10 | 13 | 19.28 (16.8)* | 13.1.6* | |
Remove comparison operators of std::span | P1085R2 | 10 | 8 | 19.26* | 10.0.1* | |
Make stateful allocator propagation more consistent for operator+(basic_string) | P1165R1 | 10 | 15 | 19.26* | 14.0.3* | |
Consistent container erasure, e.g. std::erase(std::vector), or std::erase_if(std::map) | P1209R0 P1115R3 | 9 (P1209R0) 10 (P1115R3) |
8 (P1209R0) 11 (P1115R3) |
19.25* (P1209R0) 19.27* (P1115R3) |
10.0.1* (P1209R0) 12.0.5* (P1115R3) | |
Standard library header units | P1502R1 | 11 | 19.29 (16.10)* | |||
polymorphic_allocator<> as a vocabulary type | P0339R6 | 9 | 16 | 19.28 (16.9)* | 15.0.0* | |
std::execution::unseq | P1001R2 | 9 | 17 | 19.28 (16.8)* | ||
std::lerp() and std::midpoint() | P0811R3 | 9 | 9 | 19.23* (partial) 19.28 (16.8)* |
11.0.3* | |
Usability enhancements for std::span | P1024R3 | 10 | 9* 14 |
19.26* | 11.0.3* | |
DR17: Make create_directory() intuitive | P1164R1 | 8.3 | 12 | 19.20* | 13.0.0* | |
std::ssize() and unsigned extent for std::span | P1227R2 | 10 | 9 | 19.25* | 11.0.3* | |
Traits for (un)bounded arrays | P1357R1 | 9 | 9 | 19.25* | 11.0.3* | |
std::to_array() | P0325R4 | 10 | 10 | 19.25* | 12.0.0* | |
Efficient access to std::basic_stringbuf’s buffer | P0408R7 | 11 | 17 | 19.29 (16.10)* | 15.0.0* | |
Layout-compatibility and pointer-interconvertibility traits | P0466R5 | 12 | 19.29 (16.10)** | |||
Bit operations: std::
rotl(), rotr(), countl_zero(), countl_one(), countr_zero(), countr_one(), popcount() |
P0553R4 | 9 | 9 | 19.25** 19.28 (16.8)* |
11.0.3* | |
Mathematical constants | P0631R8 | 10 | 11 | 19.25* | 12.0.5* | |
Text formatting | P0645R10 | 13 | 14** 17 |
19.29 (16.10)* | 15.0.0* | |
std::stop_token and std::jthread | P0660R10 | 10 | 17 (partial)* 20* |
19.28 (16.9)* | ||
constexpr std::allocator and related utilities
|
P0784R7 | 10 | 12 | 19.29 (16.10)* | 13.0.0* | |
constexpr std::string
|
P0980R1 | 12 | 15 | 19.29 (16.10)* 19.30** |
14.0.3* | |
constexpr std::vector
|
P1004R2 | 12 | 15 | 19.29 (16.10)* 19.30** |
14.0.3* | |
Input range adaptors | P1035R7 | 10 | 16 | 19.29 (16.10)* | 15.0.0* | |
constexpr std::invoke() and related utilities
|
P1065R2 | 10 | 12 | 19.28 (16.8)* | 13.0.0* | |
Atomic waiting and notifying, std::counting_semaphore, std::latch and std::barrier | P1135R6 | 11 | 11 | 19.28 (16.8)* | 13.1.6* | |
std::source_location | P1208R6 | 11 | 15* (partial) 16 |
19.29 (16.10)* | 15.0.0* | |
Adding <=> to the standard library | P1614R2 | 10 | 14* (partial) 17* (partial) 19 |
19.29 (16.10)* | 13.1.6* (partial) | |
constexpr default constructor of std::atomic and std::atomic_flag
|
P0883R2 | 10 | 13 | 19.26* | 13.1.6* | |
constexpr for numeric algorithms
|
P1645R1 | 10 | 12 | 19.26* | 13.0.0* | |
Safe integral comparisons | P0586R2 | 10 | 13 | 19.27* | 13.1.6* | |
C++20 feature |
Paper(s) |
GCC libstdc++ |
Clang libc++ |
MSVC STL |
Apple Clang* |
[edit] Older standards
[edit] See also
Feature testing (C++20) | A set of preprocessor macros to test the corresponding to C++ language and library features |
C documentation for compiler support
|