# Compiler support for C++26

From cppreference.com
< cpp‎ | 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.

### 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 |  | 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)* |  |  |  |  |  |  |
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 |  |  |  |  |  |  |  |  |
constexpr structured bindings and references to constexpr variables | P2686R5 |  |  |  |  | 6.7 |  |  |  |
constexpr exceptions (FTM)* | P3068R6 |  |  |  |  |  |  |  |  |
Oxford variadic comma | P3176R1 | 15 | 20 |  |  |  |  |  |  |
Removing deprecated array comparisons | P2865R6 | 15 |  |  |  |  |  |  |  |
C++26 feature | Paper(s) | GCC | Clang | MSVC | Apple Clang | EDG eccp | Intel C++ | Nvidia HPC C++ (ex PGI)* | Nvidia nvcc | Cray

### 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 |  |  |  |
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 |  |  |  |
`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 |  | 18 |  | 16.0.0*
std::span::at() (FTM)* | P2821R5 | 14 | 18 |  | 16.0.0*
Added tuple protocol to std::complex (FTM)* | P2819R2 |  | 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 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 |  |  |
DR20: Algorithm function objects | P3136R1 | Yes | Yes | 19.39* | Yes
`std::ranges::cache_latest_view` (FTM)* | P3138R5 |  |  |  |
Constraining std::expected equality operators (FTM)* | P3379R0 | 15 |  |  |
std::aligned_accessor: an std::mdspan accessor expressing pointer over-alignment (FTM)* | P2897R7 |  |  |  |
std::is_sufficiently_aligned: checks a pointer’s alignment precondition (FTM)* | P2897R7 |  |  |  |
std::atomic_ref::address() (FTM)* | P2835R7 |  |  |  |
DR11/20: cv-qualified types in std::atomic and std::atomic_ref | P3323R1 |  |  |  |
constexpr std::atomic and std::atomic_ref (FTM)* | P3309R3 |  |  |  |
constexpr for specialized memory algorithms (FTM)* | P3508R0 P3369R0 |  |  |  |
Added new library headers from C23 | P3370R1 |  |  |  |
`<simd>`: data-parallel types (FTM)* | P1928R15 |  |  |  |
A utility for creating execution environments | P3325R5 |  |  |  |
constexpr for exception types, e.g. std::bad_alloc, std::bad_cast etc. (FTM)* | P3068R6 |  |  |  |
C++26 feature | Paper(s) | GCC libstdc++ | Clang libc++ | MSVC STL | Apple Clang*

Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/compiler_support/26&oldid=169958"