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C++23

From cppreference.com
< cpp

The next generation of the C++ standard

see: The current IS schedule for C++23

Contents

[edit] New language features

[edit] New library features

[edit] Defect reports

[edit] Compiler support

[edit] 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

13.1.6*

Make () more optional for lambdas P1102R2 11 13

13.1.6*

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 6.4
DR: Allow Duplicate Attributes P2156R1 11 13

13.1.6*

Narrowing contextual conversions in static_assert and constexpr if P1401R5 9 13 (partial)*
14

13.1.6* (partial)

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 19.32*
(partial)*
6.3
auto(x) and auto{x} P0849R8 12 15
Change scope of lambda trailing-return-type P2036R3 15
#elifdef and #elifndef P2334R1 12 13

13.1.6*

Non-literal variables (and labels and gotos) in constexpr functions P2242R3 12 15 6.3
Consistent character literal encoding P2316R2 Yes Yes Yes Yes
Character sets and encodings P2314R4 Yes Yes
Extend init-statement to allow alias-declaration P2360R0 12 14
Multidimensional subscript operator P2128R6 12 15
Attributes on lambdas P2173R1 9 13

13.1.6*

DR: Adjusting the value of feature testing macro __cpp_concepts P2493R0 12 19.32* 6.4
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

[edit] 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 12 (partial)*
<stdatomic.h> P0943R6 12 15 19.31*
std::is_scoped_enum P1048R1 11 12 19.30*

13.0.0*

basic_string::contains(), 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
DR: std::visit() for classes derived from std::variant P2162R2 11.3 13 19.20**
19.30*

13.1.6*

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 15 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*

13.1.6*

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*

13.1.6*

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 14 19.30*
Remove Garbage Collection and Reachability-Based Leak Detection (library support) P2186R2 12 14 19.30*
DR: views::join should join all views of ranges P2328R1 11.2 19.30*
DR: view does not require default_initializable P2325R3 11.3 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 11.3 (partial)*
12
13 (partial)* 19.31*

13.1.6* (partial)

DR: std::format() improvements P2216R3 14 (partial)* 19.32*
DR: views::lazy_split and redesigned views::split P2210R2 12 19.31*
zip: views::zip, views::zip_transform, views::adjacent, and views::adjacent_transform P2321R2 15 (partial)*
Heterogeneous erasure overloads for associative containers P2077R3 19.32*
std::byteswap() P1272R4 12 14 19.31*
Printing volatile T* P1147R1 11.3 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 Yes
DR: Fix views::istream P2432R1 12 19.31*
DR: Add support for non-const-formattable types to std::format P2418R2 19.32*
DR: What is a view P2415R2 12 14 19.31*
DR: Fixing locale handling in chrono formatters P2372R3 19.31*
DR: Cleaning up integer-class types P2393R1 19.32*
<expected> P0323R12 12
constexpr for <cmath> and <cstdlib> P0533R9
std::unreachable() P0627R6 12 15 19.32*
Deprecating std::aligned_storage and std::aligned_union P1413R3 19.33*
A type trait to detect reference binding to temporary P2255R2
constexpr std::unique_ptr P2273R3 12 19.33*
ranges::to P1206R7
Pipe support for user-defined range adaptors P2387R3
ranges::iota, ranges::shift_left, and ranges::shift_right P2440R1
views::join_with P2441R2
views::chunk and views::slide P2442R1 19.33*
views::chunk_by P2443R1 19.33*
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