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Compiler support for C++26

From cppreference.com
 
C++
 
Compiler support
 

* - 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 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 16.0.0*
DR98: Making non-encodable string literals ill-formed P1854R4 14 14 16.0.0*
Unevaluated strings P2361R6 14 17 (partial)*
18 		16.0.0*
Adding @, $, and ` to the basic character set P2558R2 15 Yes 16.0.0*
constexpr cast from void*  (FTM)* P2738R1 14 17
DR20: On the ignorability of standard attributes P2552R3 15 Yes
DR11: Static storage for braced initializers P2752R3 14
User-generated static_assert messages  (FTM)* P2741R3 14 17
Placeholder variables with no name  (FTM)* P2169R4 14 18
Pack indexing  (FTM)* P2662R3 15 19
Removing deprecated arithmetic conversion on enumerations P2864R2 14 18
DR11/20: Template parameter initialization P2308R1 9 18
Disallow binding a returned reference to a temporary P2748R5 14 19
Attributes for structured bindings  (FTM)* P0609R3 15 19
Erroneous behavior for uninitialized reads, [[indeterminate]] attribute P2795R5
= delete("reason");  (FTM)* P2573R2 15 19
Variadic friends  (FTM)* 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  (FTM)*  (FTM)* P2747R2 15 20
Structured binding declaration as a condition  (FTM)* P0963R3 15 6 (partial)*
21
Ordering of constraints involving fold expressions  (FTM)* P2963R3 19
Deleting a pointer to an incomplete type should be ill-formed P3144R2 15 19 6.7
Structured bindings can introduce a pack  (FTM)* P1061R10 21
constexpr structured bindings and references to constexpr variables P2686R5 6.7
constexpr exceptions: [1], [2]  (FTM)* P3068R6
Oxford variadic comma P3176R1 15 20
Removing deprecated array comparisons P2865R6 15 20
#embed  (FTM)* P1967R14 15 19*
Concept and variable-template template-parameters  (FTM)* P2841R7
Trivial relocatability  (FTM)* P2786R13 21*
Trivial unions  (FTM)* P3074R7
Observable checkpoints P1494R5
Contracts  (FTM)* P2900R14
 

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  (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)*