C++23

 

C++

Compiler support

Freestanding and hosted

Language

Standard library headers

Named requirements

Feature test macros (C++20)

Language support library

Concepts library (C++20)

Diagnostics library

General utilities library

Strings library

Containers library

Iterators library

Ranges library (C++20)

Algorithms library

Numerics library

Localizations library

Input/output library

Filesystem library (C++17)

Regular expressions library (C++11)

Atomic operations library (C++11)

Thread support library (C++11)

Technical specifications

Symbols index

External libraries

 

Versions

C++98

C++03

C++11

C++14

C++17

C++20

C++23

Current Status

 

The next generation of the C++ standard

see: The current IS schedule for C++23

Compiler support

C++23 core language features

C++23 feature	Paper(s)	GCC	Clang	MSVC	Apple Clang	EDG eccp	Intel C++	IBM XLC++	Sun/Oracle C++	Embarcadero C++ Builder	Cray	Nvidia HPC C++ (ex Portland Group/PGI)	Nvidia nvcc
Literal suffix for (signed) size_t	P0330R8	11	13
Make () more optional for lambdas	P1102R2	11	13			6.3
if consteval	P1938R3	12	14			6.3
Removing Garbage Collection Support	P2186R2	12
DR: C++ Identifier Syntax using Unicode Standard Annex 31	P1949R7	12	14
DR: Allow Duplicate Attributes	P2156R1	11	13
Narrowing contextual conversions in static_assert and constexpr if	P1401R5	9	13 (partial)* 14
Trimming whitespaces before line splicing	P2223R2	Yes	Yes		Yes
Make declaration order layout mandated	P1847R4	Yes	Yes	Yes	Yes
Removing mixed wide string literal concatenation	P2201R1	Yes	Yes	Yes	Yes	Yes	Yes
Deducing this	P0847R7					6.3
auto(x) and auto{x}	P0849R8	12
Change scope of lambda trailing-return-type	P2036R3
#elifdef and #elifndef	P2334R1	12	13
Non-literal variables (and labels and gotos) in constexpr functions	P2242R3	12				6.3
Consistent character literal encoding	P2316R2	Yes	Yes			Yes
Character sets and encodings	P2314R4		Yes
Extend init-statement to allow alias-declaration	P2360R0	12	14
Multidimensional subscript operator	P2128R6	12
C++23 feature	Paper(s)	GCC	Clang	MSVC	Apple Clang	EDG eccp	Intel C++	IBM XLC++	Sun/Oracle C++	Embarcadero C++ Builder	Cray	Nvidia HPC C++	Nvidia nvcc

C++23 library features

C++23 feature	Paper(s)	GCC libstdc++	Clang libc++	MSVC STL	Apple Clang	Sun/Oracle C++ Standard Library	Embarcadero C++ Builder Standard Library	Cray C++ Standard Library
Stacktrace library	P0881R7 P2301R1
<stdatomic.h>	P0943R6	12		19.31*
std::is_scoped_enum	P1048R1	11	12	19.30*
basic_string::contains(), basic_string_view::contains()	P1679R3	11	12	19.30*
std::to_underlying	P1682R3	11	13	19.30*
Relaxing requirements for time_point<>::clock	P2212R2	N/A		N/A
DR: std::visit() for classes derived from std::variant	P2162R2	12	13	19.20** 19.30*
DR: Conditionally borrowed ranges	P2017R1	11		19.30*
DR: Repairing input range adaptors and std::counted_iterator	P2259R1	12		19.30*(partial)* 19.31*
Providing size feedback in the Allocator interface	P0401R6			19.30*
<spanstream> : string-stream with std::span-based buffer	P0448R4	12		19.31*
std::out_ptr(), std::inout_ptr()	P1132R8			19.30*
constexpr type_info::operator==()	P1328R1	12
Iterator pair constructors for std::stack and std::queue	P1425R4	12	14	19.31*
Non-deduction context for allocators in container deduction guides	P1518R2	12	13	19.31*
ranges::starts_with() and ranges::ends_with()	P1659R3			19.31*
Prohibiting std::basic_string and std::basic_string_view construction from nullptr	P2166R1	12	13	19.30*
std::invoke_r()	P2136R3	12		19.31*
Range constructor for std::basic_string_view	P1989R2	11	14	19.30*
Default template arguments for pair's forwarding constructor	P1951R1	12	14	19.30*
Remove Garbage Collection and Reachability-Based Leak Detection (library support)	P2186R2	12	14	19.30*
DR: join_view should join all views of ranges	P2328R1	11.2		19.30*
DR: view does not require default_initializable	P2325R3	12		19.30*
DR: Range adaptor objects bind arguments by value	P2281R1	11		19.29 (16.10)* (partial)* 19.31*
DR: constexpr for std::optional and std::variant	P2231R1	12	13 (partial)*	19.31*
DR: std::format() improvements	P2216R3		14 (partial)*	19.32*
DR: lazy_split_view and redesigned split_view	P2210R2	12		19.31*
zip	P2321R2
Heterogeneous erasure overloads for associative containers	P2077R3			19.32*
std::byteswap()	P1272R4	12	14	19.31*
Printing volatile T*	P1147R1	12	14	19.31*
basic_string::resize_and_overwrite()	P1072R10	12	14	19.31*
Monadic operations for std::optional	P0798R8	12	14	19.32*
std::move_only_function	P0288R9	12		19.32*
Add a conditional noexcept specification to std::exchange	P2401R0	12	14	19.25*
Require span & basic_string_view to be TriviallyCopyable	P2251R1	Yes	Yes	Yes	Yes
Clarifying the status of the “C headers”	P2340R1	Yes
DR: Fix ranges::istream_view	P2432R1	12		19.31*
DR: Add support for non-const-formattable types to std::format	P2418R2			19.32*
DR: What is a view	P2415R2		14	19.31*
DR: fixing locale handling in chrono formatters	P2372R3			19.31*
DR: Cleaning up integer-class types	P2393R1
C++23 feature	Paper(s)	GCC libstdc++	Clang libc++	MSVC STL	Apple Clang	Sun/Oracle C++ Standard Library	Embarcadero C++ Builder Standard Library	Cray C++ Standard Library