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Compiler support
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以下表格展示了编译器对新C++特性的支持情况。这些特性包括已采纳的标准修订版本以及各类技术规范：

目录

注释

* - 将鼠标悬停在标有星号 * 的单元格上可查看附加弹窗注释。
DR nn - "DR"后的数字 nn 表示缺陷报告所适用的目标C++修订版本，例如 DR20 → C++20。

C++26 特性

请注意，随着C++26/2c标准草案的演进，此列表可能发生变化。

C++26 核心语言特性

C++26 特性

提案文档

GCC
Clang
MSVC
Apple Clang
EDG eccp
Intel C++
Nvidia HPC C++ (ex PGI)*
Nvidia nvcc
Cray
DR98：从词法分析中移除未定义行为 P2621R3 是 3.3 16.0.0*
DR98：使不可编码字符串字面量成为病式 P1854R4 14 14 16.0.0*
未求值字符串 P2361R6 14 17 (部分)*
18 		16.0.0*
向 基础字符集 添加 @ 、 $ 和 ` P2558R2 15 是 16.0.0*
constexpr 从 void * 转换  ( FTM ) * P2738R1 14 17
DR20：关于标准属性的可忽略性 P2552R3 15 是
DR11：大括号初始化器的静态存储 P2752R3 14
用户生成的 static_assert 消息  ( FTM ) * P2741R3 14 17
无名称占位符变量 ( FTM ) * P2169R4 14 18
<a href="language/p

C++26 标准库特性

C++26 feature

Paper(s)

GCC libstdc++
Clang libc++
MSVC STL
Apple Clang*
Testing for success or failure of <charconv> functions  ( FTM ) * P2497R0 14 18 16.0.0*
std::text_encoding : text encodings identification  ( FTM ) * P1885R12
P2862R1 		14
Arithmetic overloads of std::to_string and std::to_wstring use std::format ( FTM ) * P2587R3 14
Type checking format args  ( FTM ) * P2757R3 15
Formatting pointers  ( FTM ) * P2510R3 14 * 17 * 19.40* *
Hashing support for std::chrono value classes  ( FTM ) * P2592R3
<rcu> : Read-Copy Update ( FTM ) * P2545R4
<hazard_pointer> : Hazard pointers ( FTM ) * P2530R3
ADL-proof std::projected P2538R1 14 * 18 * 19.38* * 16.0.0*
constexpr stable sorting  ( FTM ) * P2562R1 15 21
Member std::basic_format_arg::visit() ( FTM ) * P2637R3 15 19
Member std::variant::visit() ( FTM ) * P2637R3 15 18
std::is_within_lifetime ( FTM ) * P2641R4
Extending associative containers with the remaining heterogeneous overloads  ( FTM ) * P2363R5
Enabling the use of std::weak_ptr as keys in unordered associative containers  ( FTM ) * P1901R2
Native handles in file streams  ( FTM ) * P1759R6 14 18 16.0.0*
Interfacing string streams with std::string_view ( FTM ) * P2495R3 19
Interfacing std::bitset with std::string_view ( FTM ) * P2697R1 18 16.0.0*
More constexpr for <cmath> and <complex> ( FTM ) * ( FTM ) * P1383R2 4.6 (partial)*
Adding the new 2022 SI prefixes on ratios: std::quecto , std::ronto , std::ronna , and std::quetta ( FTM ) * P2734R0 14 17 *
std::function_ref : type-erased callable reference  ( FTM ) * P0792R14
std::copyable_function ( FTM ) * P2548R6 16
std::bind_front , std::bind_back , and std::not_fn to NTTP callables  ( FTM ) * ( FTM ) * ( FTM ) * P2714R1
std::submdspan() ( FTM ) * P2630R4
P3355R1
Freestanding language: Optional ::operator new P2013R5 N/A
Freestanding std::char_traits , std::errc and facilities in: <charconv> , <cstdlib> , <cstring> , <cwchar> ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * P2338R4 N/A
More freestanding facilities  ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * P2198R7 N/A
Saturation arithmetic ( FTM ) * P0543R3 14 18 16.0.0*
<debugging> : Debugging support ( FTM ) * P2546R5
P2810R4
<linalg> : A free function linear algebra interface based on the BLAS  ( FTM ) * P1673R13
P3050R2
P3222R0
Making assert() macro user friendly P2264R7
Runtime format strings  ( FTM ) * P2918R2 14 18 16.0.0*
std::span over an initializer list  ( FTM ) * P2447R6 15 18 16.0.0*
std::span::at() ( FTM ) * P2821R5 14 18 16.0.0*
Added tuple protocol to std::complex ( FTM ) * P2819R2 15 19
A new specification for std::generate_canonical P0952R2 19.42*
Removing deprecated typedef std::allocator::is_always_equal P2868R3 15 18 16.0.0*
Removing function overload of std::basic_string::reserve() that takes no argument P2870R3 18 16.0.0*
Removing deprecated Unicode conversion facets ( <codecvt> ) P2871R3 18 16.0.0*
Freestanding: removing std::strtok ( FTM ) * P2937R0 14 19.40*
Freestanding library: partial classes  ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * P2407R5 14 19.42*
Freestanding library: std::inout , std::expected , std::span ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * P2833R2 14 19.42*
DR23: std::basic_const_iterator should follow its underlying type’s convertibility  ( FTM ) * P2836R1
P2950R0 		14 19.40*
DR20: std::make_format_args now accepts only lvalue references instead of forwarding references P2905R2 14 18 19.40* 16.0.0*
DR20: Fix formatting of code units as integers  ( FTM ) * P2909R4 13.3 18 19.40* 16.0.0*
views::concat ( FTM ) * P2542R8 15
Concatenation of strings and string views ( FTM ) * P2591R5 15 19
Enabling list-initialization for algorithms ( FTM ) * P2248R8
P3217R0 		15
std::ranges::generate_random ( FTM ) * P1068R11
Comparisons for std::reference_wrapper , and constraints for comparisons of std::pair , std::tuple , std::optional , and std::variant ( FTM ) * ( FTM ) * P2944R3 14 19 (partial) *
Padded mdspan layouts  ( FTM ) * P2642R6
New CTAD for std::span and std::mdspan with integral constants P3029R1 19
Atomic maximum and minimum  ( FTM ) * P0493R5
std::formatter<std::filesystem::path> ( FTM ) * P2845R8
Printing Blank Lines with std::println() ( FTM ) * 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 ( FTM ) * P3107R5
P3235R3 		19.43*
Execution control library ( FTM ) * P2300R10
P3396R0
std::inplace_vector : dynamically-resizable vector with fixed capacity  ( FTM ) * P0843R14
std::philox_engine : counter-based random number engine  ( FTM ) * P2075R6
std::optional range support  ( FTM ) * P3168R2
std::is_virtual_base_of : type trait for detecting virtual base classes  ( FTM ) * P2985R0 15 20
std::dims for std::mdspan ( FTM ) * 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  ( FTM ) * P2997R1 15 19 19.42*
Deprecating std::is_trivial and std::is_trivial_v P3247R2 15 21
DR20: Algorithm function objects P3136R1 Yes 14 19.39* 14.0.3*
std::ranges::cache_latest_view ( FTM ) * P3138R5 15
Constraining std::expected equality operators ( FTM ) * P3379R0 15
std::aligned_accessor : an std::mdspan accessor expressing pointer over-alignment  ( FTM ) * P2897R7 21
std::is_sufficiently_aligned : checks a pointer’s alignment precondition  ( FTM ) * P2897R7 21
std::atomic_ref::address() ( FTM ) * P2835R7
DR11/20: cv-qualified types in std::atomic and std::atomic_ref P3323R1 19.44*
constexpr std::atomic and std::atomic_ref ( FTM ) * P3309R3
constexpr for specialized memory algorithms ( FTM ) * P3508R0
P3369R0 		15
<stdbit.h> and <stdckdint.h> P3370R1 15
<simd> : data-parallel types ( FTM ) * ( FTM ) * P1928R15
P3430R3
P3441R2
P3287R3
P2663R7
P2933R4
A utility for creating execution environments P3325R5
constexpr for exception types, e.g. std::bad_alloc , std::bad_cast etc.  ( FTM ) * P3068R6
P3378R2
Trivial relocatability traits and operations  ( FTM ) * P2786R13
Defang and deprecate std::memory_order::consume P3475R1
Put std::monostate in <utility> P0472R3 15 21 19.50*
std::indirect ( FTM ) * P3019R14
std::polymorphic ( FTM ) * P3019R14
More constexpr for containers and container adaptors:

std::deque , std::flat_map , std::flat_multimap , std::flat_set , std::flat_multiset , std::forward_list , std::list , std::map , std::multimap , std::queue , std::priority_queue , std::set , std::multiset , std::stack , std::unordered_map , std::unordered_multimap , std::unordered_set , and std::unordered_multiset
( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) *

P3372R3
constexpr std::inplace_vector for non-trivial types  ( FTM ) * P3074R7
std::ranges::to_input_view ( FTM ) * P3137R3 15
std::ranges::approximately_sized_range and std::ranges::reserve_hint ( FTM ) * P2846R6
<hive> : A bucket-based container that re-uses memory locations from erased elements  ( FTM ) * P0447R28
<contracts> : Contract-violation handling support  ( FTM ) * P2900R14
Standard library hardening  ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * P3471R4 15 (partial)* 19.44* (partial)*
Freestanding library: <algorithm> , <numeric> , <random> , ( <execution> , <memory> )
( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * 		P2976R1
DR20: Converting contiguous iterators to pointers P3349R0 15


C++26 feature

Paper(s)
GCC libstdc++
Clang libc++
MSVC STL
Apple Clang*

C++23 特性

C++23 核心语言特性

C++23 特性

提案文档

GCC
Clang
MSVC
Apple Clang
EDG eccp
Intel C++
Nvidia HPC C++ (ex PGI)*
Nvidia nvcc
Cray
字面量后缀 用于 (有符号) size_t ( FTM ) * P0330R8 11 13 19.43* 13.1.6* 6.5 2022.2 23.9
使 () 对 lambda 表达式 更可选 P1102R2 11 13 19.44* 13.1.6* 6.3 2022.2 22.5
if consteval ( FTM ) * P1938R3 12 14 19.44* 14.0.0* 6.3 2022.2 24.1
移除垃圾回收支持 P2186R2 12 不适用 19.30* 不适用 不适用
static_assert 和 constexpr if 中的窄化上下文转换 P1401R5 9 13 (部分)*
14 		14.0.0* 2022.2 20.7
行拼接前修剪空白字符 P2223R2 是 是 是 6.7 2022.2 是
使声明顺序布局成为强制要求 P1847R4 是 是 是 是 2022.2 是
移除混合宽字符串字面量 拼接 P2201R1 是 是 是 是 是 是 是
显式对象成员函数 (推导 this )  ( FTM ) * P0847R7 14 18
19* 		19.

C++23 标准库特性

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 		21 (partial)*
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)*
15 		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 21
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 15 (partial)*
15.2 		16 19.37* (partial)*
19.39* (partial)*
19.41* (partial)*
19.42* 		15.0.0*
Improve default container formatting ( FTM ) * P2585R1 15 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 18 (partial)*
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 view s 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*

C++20 特性

C++20 核心语言特性

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 ( FTM ) * 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 ( FTM ) * 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 ( FTM ) * P0734R0 5*
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  ( FTM ) * 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 ( FTM ) * P0859R0 5.2 (partial)*
9 		8 19.27* (partial)*
19.31* * 		11.0.0* (partial) 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)* 16.0.0* 5.1 2023.1 20.7 12.0
Pack-expansions in lambda init-captures ( FTM ) * 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  ( FTM ) * 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 19.20* 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 19.20* 10.0.1* 5.1 2021.1 20.7 12.0 11.0
Destroying operator delete ( FTM ) * P0722R3 9 6 19.27* 10.0.0* 6.1 2023.1 20.11 12.0 11.0
Class types in Constant 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) ( FTM ) * 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 ( FTM ) * 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 ( FTM ) * P0482R6 9 7* 19.22* 10.0.0* 5.1 2021.1 20.7 12.0 11.0
std::is_constant_evaluated() ( FTM ) * 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 )  ( FTM ) * 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 19.28 (16.9)* 11.0.3* 5.1 2021.1 20.7 12.0 11.0
Changing the active member of a union inside constexpr ( FTM ) * P1330R0 9 9 19.10* 11.0.3* 5.1 2021.1 20.7 12.0 11.0
Coroutines ( FTM ) * ( FTM ) * P0912R5
LWG3393 		10 8 (partial)
17 (partial)* 		19.0 (2015)* (partial)
19.10* *
19.28 (16.8)* 		10.0.1* (partial) 5.1 2021.1 23.3* 12.0 (host code only)
Parenthesized initialization of aggregates ( FTM ) * P0960R3 10 16 19.28 (16.8)* 16.0.0* 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 ( FTM ) * P1103R3 11 (partial) 8 (partial) 19.0 (2015)* (partial)
19.10* *
19.28 (16.8)* 		10.0.1* (partial) 2023.1 (partial)
Stronger Unicode requirements P1041R4
P1139R2 		10 Yes 19.0 (2015)* *
19.26* * 		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* *
19.24* * 		16.0.0* 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  ( FTM ) * 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 ( FTM ) * 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 ( FTM ) * 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  ( FTM ) * P1814R0 10 19 19.27* 6.5 23.9 12.0
class template argument deduction for aggregates  ( FTM ) * P1816R0
P2082R1 		10*
11* 		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 constant template parameters  ( FTM ) * 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

C++20 标准库特性

C++20 feature

Paper(s)

GCC libstdc++
Clang libc++
MSVC STL
Apple Clang*
std::endian ( FTM ) * P0463R1 8 7 19.22* 10.0.0*
Extending std::make_shared() to support arrays  ( FTM ) * P0674R1 12 15 19.27* 14.0.3*
Floating-point atomic ( FTM ) * P0020R6 10 18 19.22* 16.0.0*
Synchronized buffered ( std::basic_osyncstream )  ( FTM ) * P0053R7 11 18 19.29 (16.10)*
constexpr for <algorithm> and <utility> ( FTM ) * P0202R3 10 8 (partial)
12 		19.26* 10.0.1* (partial)
13.0.0*
More constexpr for <complex> ( FTM ) * 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 ( FTM ) * P0457R2 9 6 19.21* 10.0.0*
Library support for operator<=> <compare> ( FTM ) * P0768R1 10 7 (partial)
12 (partial)*
17 		19.20* (partial)
19.28 (16.9)* 		13.0.0*
std::remove_cvref ( FTM ) * 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  ( FTM ) * P0653R2 8 6 19.22* Yes
Atomic std::shared_ptr and std::weak_ptr ( FTM ) * P0718R2 12 19.27*
std::span ( FTM ) * P0122R7 10 7 19.26* 10.0.0*
Calendar and Time zone ( FTM ) * 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  ( FTM ) * ( FTM ) * 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 ( FTM ) * 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() ( FTM ) * 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() ( FTM ) *

P0556R3
P1956R1 		9*
10* 		9*
12* 		19.25* *
19.27* *
19.28 (16.8)* 		11.0.3* *
13.0.0* *
Improving the return value of erase-like algorithms  ( FTM ) * P0646R1 9 10 19.21* 12.0.0*
std::destroying_delete_t ( FTM ) * P0722R3 9 9 19.27* 11.0.3*
std::is_convertible ( FTM ) * P0758R1 9 9 19.23* 11.0.3*
Add std::shift_left/right to <algorithm> ( FTM ) * 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 ( FTM ) * P0887R1 9 8 19.21* 10.0.1*
Concepts library ( FTM ) * 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 ( FTM ) * P0318R1 9 8 19.21* 10.0.1*
std::bind_front() ( FTM ) * 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 ( FTM ) * 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 ( FTM ) * P0896R4 10 13 (partial)
15* 		19.29 (16.10)* 14.0.3*
Heterogeneous lookup for unordered associative containers ( FTM ) * 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 ( FTM ) * P1006R1 9 8 19.26* 10.0.1*
std::assume_aligned() ( FTM ) * P1007R3 9*
11 		15 19.28 (16.9)* 14.0.3*
Smart pointer creation with default initialization (e.g. make_unique_for_overwrite )  ( FTM ) * P1020R1
P1973R1 		11*
12* 		16 19.28 (16.9)* 15.0.0*
Misc constexpr bits  ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * 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) ( FTM ) * P1209R0
P1115R3 		9*
10* 		8*
11* 		19.25* *
19.27* * 		10.0.1* *
12.0.5* *
Standard library header units P1502R1 11 19.29 (16.10)*
polymorphic_allocator<> as a vocabulary type  ( FTM ) * P0339R6 9 16 19.28 (16.9)* 15.0.0*
std::execution::unseq ( FTM ) * P1001R2 9 17 19.28 (16.8)*
std::lerp() and std::midpoint() ( FTM ) * 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 std::create_directory() intuitive P1164R1 8.3 12 19.20* 13.0.0*
std::ssize() and unsigned extent for std::span ( FTM ) * P1227R2 10 9 19.25* 11.0.3*
Traits for ( un ) bounded arrays  ( FTM ) * P1357R1 9 9 19.25* 11.0.3*
std::to_array() ( FTM ) * 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  ( FTM ) * ( FTM ) * P0466R5 12 19.29 (16.10)* *
Bit operations : std ::

rotl() , rotr() , countl_zero() , countl_one() , countr_zero() , countr_one() , popcount() ( FTM ) *

P0553R4 9 9 19.25* *
19.28 (16.8)* 		11.0.3*
Mathematical constants ( FTM ) * P0631R8 10 11 19.25* 12.0.5*
Text formatting ( FTM ) * P0645R10 13 14 * *
17 		19.29 (16.10)* 15.0.0*
std::stop_token and std::jthread ( FTM ) * P0660R10 10 17
(partial)*
20* 		19.28 (16.9)*
constexpr std::allocator and related utilities  ( FTM ) * P0784R7 10 12 19.29 (16.10)* 13.0.0*
constexpr std::string ( FTM ) * P0426R1
P1032R1
P0980R1 		12 15 19.29 (16.10)*
19.30* * 		14.0.3*
constexpr std::vector ( FTM ) * 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 ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * ( FTM ) * P1135R6 11 11 19.28 (16.9)* 13.1.6*
std::source_location ( FTM ) * 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 ( FTM ) * P0883R2 10 13 19.26* 13.1.6*
constexpr for numeric algorithms ( FTM ) * P1645R1 10 12 19.26* 13.0.0*
Safe integral comparisons ( FTM ) * P0586R2 10 13 19.27* 13.1.6*


C++20 feature

Paper(s)
GCC libstdc++
Clang libc++
MSVC STL
Apple Clang*

旧标准

参见

功能测试 (C++20) 一组预处理器宏，用于测试对应的C++语言和库功能
C 文档 关于 编译器支持