# C++ compiler support

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The following table presents compiler support for new C++ features. These include C++11, C++14, C++17, and later accepted revisions (C++20/C++2a) to the standard, as well as various technical specifications.

## C++2a features

Note that this list may change, as the draft C++2a standard evolves.

### C++2a core language features

C++2a feature | Paper(s) | GCC | Clang | MSVC | EDG eccp | Intel C++ | IBM XLC++ | Sun/Oracle C++ | Embarcadero C++ Builder | Cray | Portland Group (PGI) | Nvidia nvcc |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Allow lambda-capture `[=, this]` | P0409R2 | 8 | 6 | 19.22* | 5.1 |  |  |  |  |  |  |
`__VA_OPT__` | P0306R4 | 8 (partial)* | 6 |  | 5.1 |  |  |  |  |  |  |
Designated initializers | P0329R4 | 4.7 (partial)* 8 | 3.0 (partial)* | 19.21* | 5.1 |  |  |  |  |  |  |
template-parameter-list for generic lambdas | P0428R2 | 8 | 9 | 19.22* | 5.1 |  |  |  |  |  |  |
Default member initializers for bit-fields | P0683R1 | 8 | 6 |  | 5.1 |  |  |  |  |  |  |
Initializer list constructors in class template argument deduction | P0702R1 | 8 | 6 | 19.14* | 5.0 |  |  |  |  |  |  |
const&-qualified pointers to members | P0704R1 | 8 | 6 | 19.0* | 5.1 |  |  |  |  |  |  |
Concepts | P0734R0 | 6 (TS only) |  |  |  |  |  |  |  |  |  |
Lambdas in unevaluated contexts | P0315R4 | 9 |  |  |  |  |  |  |  |  |  |
Three-way comparison operator | P0515R3 |  | 8 (partial)* | 19.20* |  |  |  |  |  |  |  |
Simplifying implicit lambda capture | P0588R1 | 8 |  |  |  |  |  |  |  |  |  |
init-statements for range-based for | P0614R1 | 9 | 8 |  |  |  |  |  |  |  |  |
Default constructible and assignable stateless lambdas | P0624R2 | 9 | 8 | 19.22* | 5.1 |  |  |  |  |  |  |
const mismatch with defaulted copy constructor | P0641R2 | 9 | 8 |  | 5.1 |  |  |  |  |  |  |
Access checking on specializations | P0692R1 | Yes | 8 (partial)* |  |  |  |  |  |  |  |  |
ADL and function templates that are not visible | P0846R0 | 9 | 9 | 19.21* |  |  |  |  |  |  |  |
Less eager instantiation of constexpr functions | P0859R0 | 5.2 (partial)* 9 |  |  |  |  |  |  |  |  |  |
Attributes `[[likely]]` and `[[unlikely]]` | P0479R5 | 9 |  |  | 5.1 |  |  |  |  |  |  |
Make `typename` more optional | P0634R3 | 9 |  |  |  |  |  |  |  |  |  |
Pack expansion in lambda init-capture | P0780R2 | 9 | 9 | 19.22* |  |  |  |  |  |  |  |
Attribute `[[no_unique_address]]` | P0840R2 | 9 |  |  | 5.1 |  |  |  |  |  |  |
DR: Relaxing the structured bindings customization point finding rules | P0961R1 | 8 | 8 | 19.21* | 5.1 |  |  |  |  |  |  |
DR: Relaxing the range-`for` loop customization point finding rules | P0962R1 | 8 |  |  |  |  |  |  |  |  |  |
DR: Allow structured bindings to accessible members | P0969R0 | 8 | 8 | 19.21* | 5.1 |  |  |  |  |  |  |
Contracts | P0542R5 |  |  |  |  |  |  |  |  |  |  |
Destroying operator delete | P0722R3 | 9 | 6 |  |  |  |  |  |  |  |  |
Class types in non-type template parameters | P0732R2 | 9 |  |  |  |  |  |  |  |  |  |
Deprecate implicit capture of `this` via `[=]` | P0806R2 | 9 |  | 19.22* | 5.1 |  |  |  |  |  |  |
`explicit(bool)` | P0892R2 | 9 | 9 | 19.22* | 5.1 |  |  |  |  |  |  |
Integrating feature-test macros | P0941R2 | 5 | 3.4 | 19.15* (partial) 19.20* | 5.0 |  |  |  |  |  |  |
Prohibit aggregates with user-declared constructors | P1008R1 | 9 | 8 | 19.20* | 5.1 |  |  |  |  |  |  |
constexpr virtual function | P1064R0 | 9 | 9 |  | 5.1 |  |  |  |  |  |  |
Consistency improvements for comparisons | P1120R0 |  | 8 (partial) | 19.22* |  |  |  |  |  |  |  |
`char8_t` | P0482R6 | 9 | 7 | 19.22* | 5.1 |  |  |  |  |  |  |
`std::is_constant_evaluated()` | P0595R2 | 9 | 9 |  | 5.1 |  |  |  |  |  |  |
constexpr `try`-`catch` blocks | P1002R1 | 9 | 8 |  | 5.1 |  |  |  |  |  |  |
Immediate functions | P1073R3 |  |  |  | 5.1 |  |  |  |  |  |  |
Nested inline namespaces | P1094R2 | 9 | 8 |  | 5.1 |  |  |  |  |  |  |
Yet another approach for constrained declarations | P1141R2 |  |  |  |  |  |  |  |  |  |  |
constexpr `dynamic_cast` and polymorphic `typeid` | P1327R1 |  | 9 |  | 5.1 |  |  |  |  |  |  |
Changing the active member of a union inside constexpr | P1330R0 | 9 | 9 | 19.10* | 5.1 |  |  |  |  |  |  |
Coroutines | P0912R5 |  | 8 (partial) |  |  |  |  |  |  |  |  |
Parenthesized initialization of aggregates | P0960R3 |  |  |  |  |  |  |  |  |  |  |
DR: Array size deduction in new-expressions | P1009R2 |  |  |  | 5.1 |  |  |  |  |  |  |
Modules | P1103R3 |  | 8 (partial) |  |  |  |  |  |  |  |  |
Stronger Unicode requirements | P1041R4 P1139R2 |  | Yes |  |  |  |  |  |  |  |  |
`<=> != ==` | P1185R2 |  |  | 19.22* |  |  |  |  |  |  |  |
Lambda capture and storage class specifiers of structured bindings | P1091R3 P1381R1 |  | 8 (partial) |  |  |  |  |  |  |  |  |
C++2a feature | Paper(s) | GCC | Clang | MSVC | EDG eccp | Intel C++ | IBM XLC++ | Sun/Oracle C++ | Embarcadero C++ Builder | Cray | Portland Group (PGI) | Nvidia nvcc

### C++2a library features

C++2a feature | Paper(s) | GCC libstdc++ | Clang libc++ | MSVC Standard Library | Sun/Oracle C++ Standard Library | Embarcadero C++ Builder Standard Library | Cray C++ Standard Library |
--- | --- | --- | --- | --- | --- | --- | --- | ---
`std::endian` | P0463R1 | 8 | 7 | 19.22* |  |  |
`std::remove_cvref` | P0550R2 | 9 | 6 | 19.20* |  |  |
Extending std::make_shared() to support arrays | P0674R1 |  |  |  |  |  |
Floating point atomic | P0020R6 |  |  | 19.22* |  |  |
Synchronized buffered ostream | P0053R7 |  |  |  |  |  |
`constexpr` for `<algorithm>` and `<utility>` | P0202R3 |  | 8 |  |  |  |
More `constexpr` for `<complex>` | P0415R1 | 9 | 7 (partial) |  |  |  |
Make std::memory_order a scoped enumeration | P0439R0 | 9 | 9 |  |  |  |
String prefix and suffix checking | P0457R2 | 9 | 6 | 19.21* |  |  |
Library support for `operator<=>` `<compare>` | P0515R3 |  | 7 | 19.20* (partial) |  |  |
`[[nodiscard]]` in the standard library | P0600R1 | 9 | 7 (partial) | 19.13* (partial) |  |  |
Utility to convert a pointer to a raw pointer | P0653R2 | 8 | 6 | 19.22* |  |  |
Atomic `std::shared_ptr` and `std::weak_ptr` | P0718R2 |  |  |  |  |  |
`std::span` | P0122R7 |  | 7 |  |  |  |
Calendar and timezone | P0355R7 |  | 7 (partial) |  |  |  |
`<version>` | P0754R2 | 9 | 7 | 19.22* |  |  |
Comparing unordered containers | P0809R0 |  |  | 16.0* |  |  |
ConstexprIterator requirements | P0858R0 |  |  | 19.11* |  |  |
std::basic_string::reserve() should not shrink | P0966R1 |  | 8 |  |  |  |
`std::atomic_ref` | P0019R8 |  |  |  |  |  |
`contains()` member function of associative containers | P0458R2 | 9 |  | 19.21* |  |  |
DR: Guaranteed copy elision for piecewise construction | P0475R1 | 9 |  |  |  |  |
`std::bit_cast()` | P0476R2 |  |  |  |  |  |
Integral power-of-2 operations | P0556R3 | 9 |  |  |  |  |
Improving the return value of erase-like algorithms | P0646R1 | 9 |  | 19.21* |  |  |
`std::destroying_delete` | P0722R3 | 9 |  |  |  |  |
`std::is_nothrow_convertible` | P0758R1 | 9 | 9 |  |  |  |
Add shift to `<algorithm>` | P0769R2 |  |  | 19.21* |  |  |
`std::type_identity` | P0887R1 | 9 | 8 | 19.21* |  |  |
Concepts library | P0898R3 |  |  |  |  |  |
`constexpr` comparison operators for `std::array` | P1023R0 |  | 8 |  |  |  |
`std::unwrap_ref_decay` and `std::unwrap_reference` | P0318R1 | 9 | 8 | 19.21* |  |  |
`std::bind_front()` | P0356R5 | 9 |  |  |  |  |
std::reference_wrapper for incomplete types | P0357R3 | 9 | 8 |  |  |  |
Fixing `operator>>(basic_istream&, CharT*)` | P0487R1 |  | 8 | 19.23* |  |  |
Library support for `char8_t` | P0482R6 | 9 |  | 19.22* |  |  |
Utility functions to implement uses-allocator construction | P0591R4 | 9 |  |  |  |  |
DR: std::variant and std::optional should propagate copy/move triviality | P0602R4 | 8.3 | 8 | 19.11* |  |  |
std::function's move constructor should be `noexcept` | P0771R1 | 7.2 | 6 | 19.22* |  |  |
The One Ranges Proposal | P0896R4 |  |  |  |  |  |
`<chrono>` `zero()`, `min()`, and `max()` should be `noexcept` | P0972R0 | 9 | 8 | 19.14* |  |  |
`constexpr` in std::pointer_traits | P1006R1 | 9 | 8 |  |  |  |
`std::assume_aligned()` | P1007R3 | 9 |  |  |  |  |
Remove comparison operators of `std::span` | P1085R2 |  | 8 |  |  |  |
Consistent container erasure | P1209R0 | 9 | 8 |  |  |  |
`std::lerp()` and `std::midpoint()` | P0811R3 | 9 | 9 |  |  |  |
Usability enhancements for `std::span` | P1024R3 |  | 9 |  |  |  |
DR: Make `create_directory()` Intuitive | P1164R1 |  |  | 19.20* |  |  |
`std::ssize()` and unsigned extent for `std::span` | P1227R2 |  | 9 |  |  |  |
Traits for (un)bounded arrays | P1357R0 | 9 | 9 |  |  |  |
C++2a feature | Paper(s) | GCC libstdc++ | Clang libc++ | MSVC Standard Library | Sun/Oracle C++ Standard Library | Embarcadero C++ Builder Standard Library | Cray C++ Standard Library

## C++17 features

### C++17 core language features

C++17 feature | Paper(s) | GCC | Clang | MSVC | EDG eccp | Intel C++ | IBM XLC++ | Sun/Oracle C++ | Embarcadero C++ Builder | Cray | Portland Group (PGI) | Nvidia nvcc |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
New `auto` rules for direct-list-initialization | N3922 | 5 | 3.8 | 19.0* | 4.10.1 | 17.0 |  |  |  |  | 17.7 |
`static_assert` with no message | N3928 | 6 | 2.5 | 19.10* | 4.12 | 18.0 |  |  |  |  | 17.7 |
`typename` in a template template parameter | N4051 | 5 | 3.5 | 19.0* | 4.10.1 | 17.0 |  |  |  |  | 17.7 |
Removing trigraphs | N4086 | 5 | 3.5 | 16.0* | 5.0 | 19.0.1 |  |  |  |  |  |
Nested namespace definition | N4230 | 6 | 3.6 | 19.0* | 4.12 | 17.0 |  |  |  |  | 17.7 |
Attributes for namespaces and enumerators | N4266 | 4.9 (partial)* 6 | 3.6 | 19.0* | 4.11 | 17.0 |  |  |  |  | 17.7 |
`u8` character literals | N4267 | 6 | 3.6 | 19.0* | 4.11 | 17.0 |  |  |  |  | 17.7 |
Allow constant evaluation for all non-type template arguments | N4268 | 6 | 3.6 | 19.12* | 5.0 | 19.0.1 |  |  |  |  |  |
Fold Expressions | N4295 | 6 | 3.6 | 19.12* | 4.14 | 19.0 |  |  |  |  | 18.1 |
Unary fold expressions and empty parameter packs | P0036R0 | 6 | 3.9 | 19.12* | 4.14 |  |  |  |  |  |  |
Remove Deprecated Use of the `register` Keyword | P0001R1 | 7 | 3.8 | 19.11* | 4.13 | 18.0 |  |  |  |  | 17.7 |
Remove Deprecated `operator++(bool)` | P0002R1 | 7 | 3.8 | 19.11* | 4.13 | 18.0 |  |  |  |  | 17.7 |
Make exception specifications part of the type system | P0012R1 | 7 | 4 | 19.12* | 4.14 | 19.0 |  |  |  |  |  |
Aggregate initialization of classes with base classes | P0017R1 | 7 | 3.9 | 19.14* | 5.0 | 19.0.1 |  |  |  |  |  |
`__has_include` in preprocessor conditionals | P0061R1 | 5 | Yes | 19.11* | 4.13 | 18.0 |  |  |  |  | 17.7 |
DR: New specification for inheriting constructors (DR1941 et al) | P0136R1 | 7 | 3.9 | 19.14* |  |  |  |  |  |  |  |
Lambda capture of `*this` | P0018R3 | 7 | 3.9 | 19.11* | 4.14 | 19.0 |  |  |  |  | 18.1 |
Direct-list-initialization of enumerations | P0138R2 | 7 | 3.9 | 19.11* | 4.14 | 18.0 |  |  |  |  |  |
constexpr lambda expressions | P0170R1 | 7 | 5 | 19.11* | 4.14 | 19.0 |  |  |  |  | 18.1 |
Differing begin and end types in range-based for | P0184R0 | 6 | 3.9 | 19.10* | 4.12 | 18.0 |  |  |  |  | 17.7 |
`[[fallthrough]]` attribute | P0188R1 | 7 | 3.9 | 19.10* | 4.13 | 18.0 |  |  |  |  | 17.7 |
`[[nodiscard]]` attribute | P0189R1 | 7 | 3.9 | 19.11* | 4.13 | 18.0 |  |  |  |  | 17.7 |
`[[maybe_unused]]` attribute | P0212R1 | 7 | 3.9 | 19.11* | 4.13 | 18.0 |  |  |  |  | 17.7 |
Hexadecimal floating-point literals | P0245R1 | 3.0 | Yes | 19.11* | 4.13 | 18.0 |  |  |  |  | 17.7 |
Using attribute namespaces without repetition | P0028R4 | 7 | 3.9 | 19.11* | 4.13 | 18.0 |  |  |  |  | 17.7 |
Dynamic memory allocation for over-aligned data | P0035R4 | 7 | 4 | 19.12* | 4.14 |  |  |  |  |  |  |
Class template argument deduction | P0091R3 | 7 | 5 | 19.14* | 5.0 | 19.0.1 |  |  |  |  | 19.1 |
Non-type template parameters with `auto` type | P0127R2 | 7 | 4 | 19.14* | 5.0 | 19.0.1 |  |  |  |  | 19.1 |
Guaranteed copy elision | P0135R1 | 7 | 4 | 19.13* | 5.0 | 19.0.1 |  |  |  |  | 19.1 |
Replacement of class objects containing reference members | P0137R1 | 7 | 6 | 19.14* | 5.0 |  |  |  |  |  |  |
Stricter expression evaluation order | P0145R3 | 7 | 4 | 19.14* | 5.0 | 19.0.1 |  |  |  |  |  |
Structured Bindings | P0217R3 | 7 | 4 | 19.11* | 4.14 | 19.0 |  |  |  |  | 18.1 |
Ignore unknown attributes | P0283R2 | Yes | 3.9 | 19.11* | 4.13 | 18.0 |  |  |  |  | 17.7 |
constexpr if statements | P0292R2 | 7 | 3.9 | 19.11* | 4.14 | 19.0 |  |  |  |  | 18.1 |
init-statements for if and switch | P0305R1 | 7 | 3.9 | 19.11* | 4.14 | 18.0 |  |  |  |  | 18.1 |
Inline variables | P0386R2 | 7 | 3.9 | 19.12* | 4.14 | 19.0 |  |  |  |  | 18.1 |
Removing Deprecated Exception Specifications from C++17 | P0003R5 | 7 | 4 | 19.10* | 4.14 | 19.0 |  |  |  |  |  |
Pack expansions in using-declarations | P0195R2 | 7 | 4 | 19.14* | 5.0 |  |  |  |  |  |  |
DR: Matching of template template-arguments excludes compatible templates | P0522R0 | 7 | 4 | 19.12* | 5.0 | 19.0.1 |  |  |  |  |  |
C++17 feature | Paper(s) | GCC | Clang | MSVC | EDG eccp | Intel C++ | IBM XLC++ | Sun/Oracle C++ | Embarcadero C++ Builder | Cray | Portland Group (PGI) | Nvidia nvcc

### C++17 library features

C++17 feature | Paper(s) | GCC libstdc++ | Clang libc++ | MSVC Standard Library | Intel Parallel STL | Sun/Oracle C++ Standard Library | Embarcadero C++ Builder Standard Library | Cray C++ Standard Library |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
std::void_t | N3911 | 6 | 3.6 | 19.0* | N/A |  |  |
`std::uncaught_exceptions()` | N4259 | 6 | 3.7 | 19.0* | N/A |  |  |
std::size(), std::empty() and std::data() | N4280 | 6 | 3.6 | 19.0* | N/A |  |  |
Improving std::pair and std::tuple | N4387 | 6 | 4 | 19.0* | N/A |  |  |
std::bool_constant | N4389 | 6 | 3.7 | 19.0* | N/A |  |  |
std::shared_mutex (untimed) | N4508 | 6 | 3.7 | 19.0* | N/A |  |  |
Type traits variable templates | P0006R0 | 7 | 3.8 | 19.0* | N/A |  |  |
Logical operator type traits | P0013R1 | 6 | 3.8 | 19.0* | N/A |  |  |
Standardization of Parallelism TS | P0024R2 | 9* |  | 19.14* | 18.0* |  |  |
std::clamp() | P0025R0 | 7 | 3.9 | 19.0* | N/A |  |  |
Hardware interference size | P0154R1 |  |  | 19.11* | N/A |  |  |
(nothrow-)swappable traits | P0185R1 | 7 | 3.9 | 19.0* | N/A |  |  |
File system library | P0218R1 | 8 | 7 | 19.14* | N/A |  |  |
std::string_view | N3921 P0220R1 | 7 | 4 | 19.10* | N/A |  |  |
std::any | P0220R1 | 7 | 4 | 19.10* | N/A |  |  |
std::optional | P0220R1 | 7 | 4 | 19.10* | N/A |  |  |
Polymorphic memory resources | P0220R1 | 9 |  | 19.13* | N/A |  |  |
Mathematical special functions | P0226R1 | 7 |  | 19.14* | N/A |  |  |
C++17 should refer to C11 instead of C99 | P0063R3 | 9 | 7 | 19.0* (partial)* | N/A |  |  |
Splicing Maps and Sets | P0083R3 | 7 | 8 | 19.12* | N/A |  |  |
std::variant | P0088R3 | 7 | 4 | 19.10* | N/A |  |  |
std::make_from_tuple() | P0209R2 | 7 | 3.9 | 19.10* | N/A |  |  |
std::has_unique_object_representations | P0258R2 | 7 | 6 | 19.11* | N/A |  |  |
std::gcd() and std::lcm() | P0295R0 | 7 | 4 | 19.11* | N/A |  |  |
std::not_fn | P0005R4 P0358R1 | 7 | 3.9 | 19.12* | N/A |  |  |
Elementary string conversions | P0067R5 | 8 (no FP) | 7 (no FP) | 19.14* (no FP)* | N/A |  |  |
std::shared_ptr and std::weak_ptr with array support | P0414R2 | 7 |  | 19.12* | N/A |  |  |
`std::scoped_lock` | P0156R2 | 7 | 5 | 19.11* | N/A |  |  |
`std::byte` | P0298R3 | 7 | 5 | 19.11* | N/A |  |  |
`std::is_aggregate` | LWG2911 | 7 | 5 | 19.15* | N/A |  |  |
C++17 feature | Paper(s) | GCC libstdc++ | Clang libc++ | MSVC Standard Library | Intel Parallel STL | Sun/Oracle C++ Standard Library | Embarcadero C++ Builder Standard Library | Cray C++ Standard Library

## C++14 features

### C++14 core language features

C++14 feature | Paper(s) | GCC | Clang | MSVC | EDG eccp | Intel C++ | IBM XLC++ | Sun/Oracle C++ | Embarcadero C++ Builder | Cray | Portland Group (PGI) | Nvidia nvcc |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Tweaked wording for contextual conversions | N3323 | 4.9 | 3.4 | 18.0* | 4.9 | 16.0 | 13.1.2* | 5.15 |  | 8.6 | 16.1 | 9.0
Binary literals | N3472 | 4.3 (GNU) 4.9 | 2.9 | 19.0* | 4.10 | 11.0 | 13.1.2* | 5.14 |  | 8.6 | 2015 | 9.0
`decltype(auto)`, Return type deduction for normal functions | N3638 | 4.8 (partial)* 4.9 | 3.3 (partial)* 3.4 | 19.0* | 4.9 | 15.0 | 13.1.2* | 5.15 |  | 8.6 | 16.1 | 9.0
Initialized/Generalized lambda captures (init-capture) | N3648 | 4.5 (partial) 4.9 | 3.4 | 19.0* | 4.10 | 15.0 |  | 5.15 |  | 8.6 | 16.1 | 9.0
Generic (polymorphic) lambda expressions | N3649 | 4.9 | 3.4 | 19.0* | 4.10 | 16.0 | 13.1.2* | 5.15 |  | 8.6 | 16.1 | 9.0
Variable templates | N3651 | 5 | 3.4 | 19.0* | 4.11 | 17.0 | 13.1.2* | 5.15 |  | 8.6 | 17.4 | 9.0
Extended constexpr | N3652 | 5 | 3.4 | 19.10* | 4.11 | 17.0 | 13.1.2* | 5.15 |  | 8.6 | 17.4 | 9.0
Member initializers and aggregates (NSDMI) | N3653 | 5 | 3.3 | 19.10* | 4.9 | 16.0 |  | 5.14 |  | 8.6 | 16.1 | 9.0
Clarifying memory allocation (avoiding/fusing allocations) | N3664 | N/A | 3.4 | N/A | N/A |  |  | N/A |  | 8.6 | 17.4 |
`[[deprecated]]` attribute | N3760 | 4.9 | 3.4 | 19.0* | 4.9 | 15.0* 16.0 | 13.1.2* | 5.14 |  | 8.6 | 16.1 | 9.0
Sized deallocation | N3778 | 5 | 3.4 | 19.0* | 4.10.1 | 17.0 |  | 5.14 |  | 8.6 | 16.1 |
Single quote as digit separator | N3781 | 4.9 | 3.4 | 19.0* | 4.10 | 16.0 | 13.1.2* | 5.14 |  | 8.6 | 2015 | 9.0
C++14 feature | Paper(s) | GCC | Clang | MSVC | EDG eccp | Intel C++ | IBM XLC++ | Sun/Oracle C++ | Embarcadero C++ Builder | Cray | Portland Group (PGI) | Nvidia nvcc

### C++14 library features

C++14 feature | Paper(s) | GCC libstdc++ | Clang libc++ | MSVC Standard Library | Sun/Oracle C++ Standard Library | Embarcadero C++ Builder Standard Library | Cray C++ Standard Library |
--- | --- | --- | --- | --- | --- | --- | --- | ---
`constexpr` for `<complex>` | N3302 | 5 | 3.4 | 19.0* | 5.15 |  | 8.6
std::result_of and SFINAE | N3462 | 5 | Yes | 19.0* | 5.15 | Yes | 8.6
`constexpr` for `<chrono>` | N3469 | 5 | 3.4 | 19.0* | 5.15 |  | 8.6
`constexpr` for `<array>` | N3470 | 5 | 3.4 | 19.0* | 5.15 |  | 8.6
`constexpr` for `<initializer_list>`, `<utility>` and `<tuple>` | N3471 | 5 | 3.4 | 19.0* | 5.15 |  | 8.6
Improved std::integral_constant | N3545 | 5 | 3.4 | 19.0* | 5.15 |  | 8.6
User-defined literals for `<chrono>` and `<string>` | N3642 | 5 | 3.4 | 19.0* | 5.15 |  | 8.6
Null forward iterators | N3644 | 5 (partial) | 3.4 | 19.0* | 5.15 |  | 8.6
std::quoted | N3654 | 5 | 3.4 | 19.0* | 5.15 |  | 8.6
Heterogeneous associative lookup | N3657 | 5 | 3.4 | 19.0* | 5.15 |  | 8.6
std::integer_sequence | N3658 | 5 | 3.4 | 19.0* | 5.15 |  | 8.6
std::shared_timed_mutex | N3659 | 5 | 3.4 | 19.0* | 5.15 |  | 8.6
std::exchange | N3668 | 5 | 3.4 | 19.0* | 5.15 |  | 8.6
fixing `constexpr` member functions without `const` | N3669 | 5 | 3.4 | 19.0* | 5.15 |  | 8.6
`std::get<T>()` | N3670 | 5 | 3.4 | 19.0* | 5.15 |  | 8.6
Dual-Range std::equal, std::is_permutation, std::mismatch | N3671 | 5 | 3.4 | 19.0* | 5.15 |  | 8.6
C++14 feature | Paper(s) | GCC libstdc++ | Clang libc++ | MSVC Standard Library | Sun/Oracle C++ Standard Library | Embarcadero C++ Builder Standard Library | Cray C++ Standard Library

## C++11 features

### C++11 core language features

C++11 feature | Paper(s) | GCC | Clang | MSVC | EDG eccp | Intel C++ | IBM XLC++ | Sun/Oracle C++ | Embarcadero C++ Builder | Cray | Portland Group (PGI) | Nvidia nvcc | HP aCC | Digital Mars C++ |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
C99 preprocessor | N1653 | 4.3 | Yes | 19.0* (partial)* | 4.1 | 11.1 | 10.1 | 5.9 | Yes | 8.4 | 2015 | 7.0 | A.06.25 | Yes
static_assert | N1720 | 4.3 | 2.9 | 16.0* | 4.1 | 11.0 | 11.1 | 5.13 | Yes | 8.4 | 2015 | 7.0 | A.06.25 | 8.52
Right angle brackets | N1757 | 4.3 | Yes | 14.0* | 4.1 | 11.0 | 12.1 | 5.13 | Yes | 8.4 | 2015 | 7.0 |  |
Extended friend declarations | N1791 | 4.7 | 2.9 | 16.0* (partial) 18.0* | 4.1 | 11.1* 12.0 | 11.1 | 5.13 | Yes | 8.4 | 2015 | 7.0 | A.06.25 |
long long | N1811 | Yes | Yes | 14.0* | Yes | Yes | Yes | Yes | Yes | 8.4 | 2015 | 7.0 | Yes | Yes
Type traits | N1836 | 4.3 | 3.0 | 14.0* | 4.0 | 10.0 | 13.1.3 | 5.13 | Yes | 8.4 | 2015 |  | 6.16 |
`auto` | N1984 | 4.4 | Yes | 16.0* | 3.9 | 11.0 (v0.9) 12.0 | 11.1 | 5.13 | Yes | 8.4 | 2015 | 7.0 | A.06.25 |
Delegating constructors | N1986 | 4.7 | 3.0 | 18.0* | 4.7 | 14.0 | 11.1 | 5.13 | Yes | 8.4 | 2015 | 7.0 | A.06.28 |
extern template | N1987 | 3.3 | Yes | 12.0* | 3.9 | 9.0 | 11.1 | 5.13 | Yes | 8.4 | 2015 | 7.0 | A.06.25 |
`constexpr` | N2235 | 4.6 | 3.1 | 19.0* (partial) | 4.6 | 13.0* 14.0 | 12.1* 13.1 | 5.13 | Yes | 8.4 | 2015 | 7.0 | A.06.28 |
Template aliases | N2258 | 4.7 | 3.0 | 18.0* | 4.2 | 12.1 | 13.1.1* | 5.13 | Yes | 8.4 | 2015 | 7.0 | A.06.27 |
`char16_t` and `char32_t` | N2249 | 4.4 | 2.9 | 19.0* | 4.4 | 12.1* 14.0 | 13.1.1* | 5.13 | Yes | 8.4 | 2015 | 7.0 | A.06.27 | 8.52
`alignas` | N2341 | 4.8 | 3.0 | 19.0* | 4.8 | 15.0 | 13.1.2* | 5.13 | Yes | 8.6 | 2015 | 7.0 |  |
`alignof` | N2341 | 4.5 | 2.9 | 19.0* | 4.8 | 15.0 | 13.1.2* | 5.13 | Yes | 8.4 | 2015 | 7.0 |  |
Defaulted and deleted functions | N2346 | 4.4 | 3.0 | 18.0* | 4.1 | 12.0 | 13.1 | 5.13 | Yes | 8.4 | 2015 | 7.0 | A.06.25 |
Strongly-typed enum | N2347 | 4.4 | 2.9 | 17.0* | 4.0 | 13.0 | 12.1 | 5.13 | Yes | 8.4 | 2015 | 7.0 | A.06.25 |
Atomic operations | N2427 | 4.4 | 3.1 | 17.0* | Yes | 13.0 | 13.1.2* | 5.14 | Yes | 8.4 | 2015 |  |  |
nullptr | N2431 | 4.6 | 2.9 | 16.0* | 4.2 | 12.1 | 13.1 | 5.13 | Yes | 8.4 | 2015 | 7.0 | A.06.27 | 8.52
Explicit conversion operators | N2437 | 4.5 | 3.0 | 18.0* | 4.4 | 13.0 | 12.1 | 5.13 | Yes | 8.4 | 2015 | 7.0 | A.06.27 |
ref-qualifiers | N2439 | 4.8.1 | 2.9 | 19.0* | 4.7 | 14.0 | 13.1.2* | 5.13 | Yes | 8.4 | 2015 | 7.0 | A.06.28 |
Unicode string literals | N2442 | 4.4 | 3.0 | 19.0* | 4.7 | 11.0* | 10.1* 13.1.1* | 5.7 | Yes | 8.4 | 2015 | 7.0 | A.06.28 | 8.52
Raw string literals | N2442 | 4.5 | Yes | 18.0* | 4.7 | 14.0 | 13.1.1* | 5.13 | Yes | 8.4 | 2015 | 7.0 | A.06.28 | 8.52
Inline namespaces | N2535 | 4.4 | 2.9 | 19.0* | 4.5 | 14.0 | 11.1 | 5.13 | Yes | 8.4 | 2015 | 7.0 | A.06.28 |
Inheriting constructors | N2540 | 4.8 | 3.3 | 19.0* | 4.8 | 15.0 | 13.1.1* | 5.13 | Yes | 8.4 | 2015 | 7.0 |  |
Trailing function return types | N2541 | 4.4 | 2.9 | 16.0* | 4.1 | 12.0 | 12.1 | 5.13 | Yes | 8.4 | 2015 | 7.0 | A.06.27 |
Unrestricted unions | N2544 | 4.6 | 3.0 | 19.0* | 4.6 | 14.0* | 13.1.2* | 5.13 | Yes | 8.4 | 2015 | 7.0 | A.06.28 |
Variadic templates | N2242 N2555 | 4.3 (N2242) 4.4 | 2.9 | 18.0* | 4.3 (N2242) 4.3 | 12.1 | 11.1 (N2242) | 5.13 | Yes | 8.4 | 2015 | 7.0 | A.06.27 |
Expression SFINAE | N2634 | 4.4 | 2.9 | 19.14* | 4.2 | 12.1 |  |  | Yes | 8.4 | 2015 | 7.0 |  |
Local and unnamed types as template parameters | N2657 | 4.5 | 2.9 | 16.0* | 4.2 | 12.0 | 13.1.2* | 5.13 | Yes | 8.4 | 2015 | 7.0 | A.06.27 |
Thread-local storage | N2659 | 4.4 (partial) 4.8 | 3.3* | 16.0* (partial) 19.0* | 4.8 | 11.1 (partial) 15.0* | 10.1 (partial)* 13.1.2 (partial)* | 5.9 (partial) | Yes | 8.4 | 2015 |  |  | 8.52 (partial)
Dynamic initialization and destruction with concurrency (magic statics) | N2660 | 4.3 | 2.9 | 19.0* | Yes | 11.1* | 13.1.2* | 5.13 | Yes | 8.4 | 2015 |  | A.06.25 |
Garbage Collection and Reachability-Based Leak Detection | N2670 |  |  |  |  |  |  |  |  |  |  |  |  |
Initializer lists | N2672 | 4.4 | 3.1 | 18.0* | 4.5 | 13.0 (partial) 14.0 | 13.1.2* | 5.13 | Yes | 8.4 | 2015 | 7.0 | A.06.28 |
Non-static data member initializers | N2756 | 4.7 | 3.0 | 18.0* | 4.6 | 14.0 | 13.1.2* | 5.13 | Yes | 8.4 | 2015 | 7.0 | A.06.28 |
Attributes | N2761 | 4.8 | 3.3 | 19.0* | 4.2 | 12.1 | 13.1.1* | 5.13 | Yes | 8.4 | 2015 | 7.0 | A.06.27 |
Forward enum declarations | N2764 | 4.6 | 3.1 | 17.0* | 4.5 | 11.1 (partial) 14.0 | 12.1 | 5.13 | Yes | 8.4 | 2015 | 7.0 |  |
User-defined literals | N2765 | 4.7 | 3.1 | 19.0* | 4.8 | 15.0 | 13.1.2* | 5.14 | Yes | 8.4 | 2015 | 7.0 |  |
Lambda expressions | N2550 N2658 N2927 | 4.5 | 3.1 | 16.0* (N2658) 17.0* | 4.1 | 12.0 | 13.1.2* | 5.13 | Yes | 8.4 | 2015 | 7.0 - claims N2927 | A.06.25 |
Range-for loop | N2930 | 4.6 | 3.0 | 17.0* | 4.5 | 13.0 | 13.1.2* | 5.13 | Yes | 8.4 | 2015 | 7.0 | A.06.28 |
noexcept | N3050 | 4.6 | 3.0 | 19.0* | 4.5 | 14.0 | 13.1.1* | 5.13 | Yes | 8.4 | 2015 | 7.0 | A.06.28 |
Rvalue references | N2118 N2844 CWG1138 N3053 | 4.3 (N2118) 4.5 (CWG1138) 4.6 | Yes | 16.0* (N2844) 17.0* (CWG1138) 19.0* | 4.5 | 11.1 (N2118) 12.0 (N2844) 14.0 | 12.1 (CWG1138) | 5.13 | Yes | 8.4 | 2015 | 7.0 - lists N2118 | A.06.25 |
override and final | N2928 N3206 N3272 | 4.7 | 2.9 | 14.0* (partial) 17.0* | 4.8 | 12.0 (N2928) 14.0 | 13.1.1* | 5.13 | Yes | 8.4 | 2015 | 7.0 |  |
`decltype` | N2343 N3276 | 4.3 (N2343) 4.8.1 | 2.9 | 16.0* | 4.2 (N2343) 4.8 | 11.0 (N2343) 12.0 | 11.1 (N2343) | 5.13 | Yes | 8.4 | 2015 | 7.0 | A.06.25 | 8.52 (N2343)
C++11 feature | Paper(s) | GCC | Clang | MSVC | EDG eccp | Intel C++ | IBM XLC++ | Sun/Oracle C++ | Embarcadero C++ Builder | Cray | Portland Group (PGI) | Nvidia nvcc | HP aCC | Digital Mars C++

### C++11 library features

C++11 feature | Paper(s) | GCC libstdc++ | Clang libc++ | MSVC Standard Library | Sun/Oracle C++ Standard Library | Embarcadero C++ Builder Standard Library | Cray C++ Standard Library |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Garbage Collection and Reachability-Based Leak Detection (library support) | N2670 | 6 (no-op) | 3.4 (no-op) | 19.0* (no-op) |  |  |
Money, Time, and hexfloat I/O manipulators | N2071 N2072 | 5 | 3.8 | 19.0* | 5.15 |  |
C++11 feature | Paper(s) | GCC libstdc++ | Clang libc++ | MSVC Standard Library | Sun/Oracle C++ Standard Library | Embarcadero C++ Builder Standard Library | Cray C++ Standard Library

* - hover over the version number to see notes

## References

Individual vendor compatibility checklists (these are more up-to-date than the table above)

- GCC (Updated 2019-05)

  - C++11 core language support status (complete as of 4.8.1, except for n2670, which no compiler implements)
  - C++14 core language support status (complete as of 5.1)
  - C++17 core language support status (complete as of 7.1)
  - C++20 core language support status
  - C++11 library support status (complete as of 5.1)
  - C++14 library support status (complete as of 5.1)
  - C++17 library support status
  - C++20 library support status
  - Technical Specifications support status

- Clang++ (Updated 2019-04)

  - C++11 core language support status (complete as of 3.3)
  - C++11 library support status (complete as of 2012-07-29)
  - C++14 core language support status (complete as of 3.4)
  - C++14 library support status (complete as of 3.5)
  - Technical Specifications support status
  - C++17 core language support status (complete as of 5.0)
  - C++17 library support status
  - C++20 core language support status
  - C++20 library support status
  - Core language defect report status

- Microsoft Visual Studio (updated 2019-05)

  - C++17/20 Features and Fixes in Visual Studio 2019
  - STL Features and Fixes in VS 2017 15.8
  - C++17 Announcing: MSVC Conforms to the C++ Standard (complete as of 15.7)
  - C++17 Features And STL Fixes In VS 2017 15.5
  - C++17 Features And STL Fixes In VS 2017 15.3
  - C++11/C++14/C++17 core language and library status in VS2017.3
  - C++11/C++14/C++17 core language support status
    - C++11/14/17 core language support status in VS2010, VS2012, VS2013, and VS2015
    - VS2013 vs. VS2015 CTP0
    - VS2013 vs. VS2015 CTP1
    - VS2013 vs. VS2015 CTP3 (includes the roadmap table)
    - VS2015 ("VS14") preview
    - VS2015 ("VS14") release candidate (C++11 remains incomplete, but C++17 support appears)
    - VS2017
  - C++11 and C++14 library support status
  - C++11/14/17 Features In VS 2015 RTM including core language and standard library (including technical specifications)
  - C++14/17 features in VS 2015 Update 2 standard library library is feature complete up to current C++17 with few minor issues (some defect reports, some constexprs, etc)
  - C++14/17 Features and STL Fixes in VS “15” Preview 5 including a detailed C++17 status table

- Intel C++ (Updated 2018-11)

  - C++11 core language support status (complete as of 15.0)
  - C++14 core language support status (functionally complete as of 17.0 - N3664 is an optimization)
  - C++17 core language support status (incomplete)
  - C++17 features of Intel 19.0 beta
  - Intel does not ship an implementation of the C++ standard library, except for
    - Parallel STL (an implementation of the C++17 standard library algorithms with support for execution policies)
  - Intel's compatibility with versions of libstdc++ from GCC

- EDG (Updated 2019-04)

  - C++11 core language support status
  - C++14 core language support status
  - C++17 core language support status
  - C++20 core language support status
  - EDG does not ship an implementation of the C++ standard library

- Oracle C++ (updated 2017-07)

  - Version number is compiler version, not Oracle Studio version
  - C++11 core language support status in 5.13
    - Missing C++11 support added in 5.14 (page has a typo, and still says 5.13)
  - C++14 features added in 5.14
    - Full C++14 support added in 5.15.
  - Oracle ships 4 implementations of the C++ standard library:
    - libCstd (RogueWave Standard Library version 2), predates C++98
    - stlport4 (STLport Standard Library version 4.5.3), predates C++03
    - stdcxx4 (Apache Standard Library version 4), predates C++11
    - libstdc++ (GCC runtime library, support for C++11 and C++14 depending on release)

- IBM XL C++ (updated 2018-05)

  - IBM XL C++ for Linux
    - Core language support status: C++11 complete as of 13.1.6, C++14 partial in 16.1.0
    - IBM does not ship an implementation of C++ standard library for Linux (uses GNU libstdc++)
  - IBM XL C++ for AIX
    - Core language support status: C++11 partial in 13.1.3.
    - IBM ships a version of Dinkumware library for AIX with full support for C++ TR1, including <regex>, but no C++11

- HP aCC

  - HP aC++ A.06.28 release notes (including C++11 core language features)
  - HP ships a version of RogueWave STL 2.0 implementation of the C++98 standard library

- Digital Mars C++

  - C++11 core language support status

- Embarcadero C++

  - Language features compliance status (RAD Studio 10.1 Berlin), including C++11 features supported by legacy and Clang-enhanced compilers (based on Clang 3.3)
  - Language features compliance status (RAD Studio 10.3 Rio), including C++11 features supported by legacy compilers and C++11, C++14, and C++17 features supported by the Clang-enhanced compilers (based on Clang 5.0)

- Cray (updated 2018-01)

  - [1] For version 8.4, claims all of C++14 is supported except alignas
  - Cray C and C++ Reference Manual (8.6) For version 8.6, claims all of C++14 is supported

- Portland Group (PGI) (updated 2019-01)

  - Release notes for 2016 claim C++14 support, except "generalized constexpr and constexpr member functions and implicit const, variable templates, clarifying memory allocation (merged allocation)"
  - Release notes for 2018
  - Reference manual of PGI 19.1
  - PGI does not ship an implementation of C++ standard library

- Nvidia Cuda nvcc (updated 2019-03)

  - CUDA C Programming Guide (v10.1.105)
  - NVCC does not ship an implementation of C++ standard library

- Texas Instruments (updated 2018-05)

  - cl430 version v18.1.0 claims C++14 support

- Analog Devices (updated 2018-05)

  - CrossCore Embedded Studio 2.8.0 for SHARC claims C++11 support.

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