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
if consteval	P1938R3	12
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
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
<stdatomic.h>	P0943R6			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*
std::visit for classes derived from std::variant	P2162R2		13	19.20** 19.30*
Relaxing requirements for time_point<>::clock	P2212R2	N/A		N/A
DR: Conditionally borrowed ranges	P2017R1			19.30*
DR: Repairing input range adaptors and std::counted_iterator	P2259R1			19.30*(partial)* 19.31*
Providing size feedback in the Allocator interface	P0401R6			19.30*
<spanstream> : string-stream with std::span-based buffer	P0448R4			19.31*
std::out_ptr(), std::inout_ptr()	P1132R8			19.30*
constexpr type_info::operator==()	P1328R1
Iterator pair constructors for std::stack and std::queue	P1425R4			19.31*
Non-deduction context for allocators in container deduction guides	P1518R2		13	19.31*
ranges::starts_with() and ranges::ends_with()	P1659R3
Prohibiting std::basic_string and std::basic_string_view construction from nullptr	P2166R1		13	19.30*
std::invoke_r()	P2136R3	12		19.31*
Range constructor for std::basic_string_view	P1989R2	11		19.30*
Default template arguments for pair's forwarding constructor	P1951R1	12		19.30*
Remove Garbage Collection and Reachability-Based Leak Detection (library support)	P2186R2	12		19.30*
DR: join_view should join all views of ranges	P2328R1			19.30*
DR: view does not require default_initializable	P2325R3			19.30*
DR: Range adaptor objects bind arguments by value	P2281R1			19.29 (16.10)* (partial)* 19.31*
DR: constexpr for std::optional and std::variant	P2231R1		13 (partial)*	19.31*
DR: std::format() improvements	P2216R3
DR: lazy_split_view and redesigned split_view	P2210R2			19.31*
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