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 to the standard, as well as various technical specifications.
C++ 2017 features
| C++ 2017 feature |
Paper(s) |
Version |
GCC |
Clang |
MSVC |
EDG eccp |
Intel C++ |
IBM XLC++ |
Sun/Oracle C++ |
Embarcadero C++ Builder |
Cray |
Portland Group (PGI) |
HP aCC |
Digital Mars C++ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| New auto rules for direct-list-initialization | N3922 | c++17-lang | 5.0 | 3.8 | 19.0* | 4.10.1 | 17.0 | |||||||
| static_assert with no message | N3928 | c++17-lang | 6 | 2.5 | 19.1* | 4.12 | ||||||||
| typename in a template template parameter | N4051 | c++17-lang | 5.0 | 3.5 | 19.0* | 4.10.1 | 17.0 | |||||||
| Removing trigraphs | N4086 | c++17-lang | 5.1 | 3.5 | 10.0* | |||||||||
| Nested namespace definition | N4230 | c++17-lang | 6 | 3.6 | 19.0* | 4.12 | 17.0 | |||||||
| Attributes for namespaces and enumerators | N4266 | c++17-lang | 4.9 (namespaces) / 6 (enumerators) | 3.6 | 19.0* | 4.11 | ||||||||
| u8 character literals | N4267 | c++17-lang | 6 | 3.6 | 19.0* | 4.11 | 17.0 | |||||||
| Allow constant evaluation for all non-type template arguments | N4268 | c++17-lang | 6 | 3.6 | ||||||||||
| Fold Expressions | N4295 | c++17-lang | 6 | 3.6 | ||||||||||
| Remove Deprecated Use of the register Keyword | P0001R1 | c++17-lang | 7 | 3.8 | ||||||||||
| Remove Deprecated operator++(bool) | P0002R1 | c++17-lang | 7 | 3.8 | ||||||||||
| Removing Deprecated Exception Specifications from C++17 | P0003R5 | c++17-lang | 7 | 4 | ||||||||||
| Make exception specifications part of the type system | P0012R1 | c++17-lang | 7 | 4 | ||||||||||
| Aggregate initialization of classes with base classes | P0017R1 | c++17-lang | 7 | 3.9 | ||||||||||
| Lambda capture of *this | P0018R3 | c++17-lang | 7 | 3.9 | ||||||||||
| Using attribute namespaces without repetition | P0028R4 | c++17-lang | 7 | 3.9 | ||||||||||
| Dynamic memory allocation for over-aligned data | P0035R4 | c++17-lang | 7 | 4 | ||||||||||
| Unary fold expressions and empty parameter packs | P0036R0 | c++17-lang | 6 | 3.9 | ||||||||||
| __has_include in preprocessor conditionals | P0061R1 | c++17-lang | 5.0 | Yes | ||||||||||
| Template argument deduction for class templates | P0091R3 | c++17-lang | 7 | 5 | ||||||||||
| Non-type template parameters with auto type | P0127R2 | c++17-lang | 7 | 4 | ||||||||||
| Guaranteed copy elision | P0135R1 | c++17-lang | 7 | 4 | ||||||||||
| New specification for inheriting constructors (DR1941 et al) | P0136R1 | c++17-lang | 7 | 3.9 | ||||||||||
| Direct-list-initialization of enumerations | P0138R2 | c++17-lang | 7 | 3.9 | ||||||||||
| Stricter expression evaluation order | P0145R3 | c++17-lang | 7 | 4 | ||||||||||
| constexpr lambda expressions | P0170R1 | c++17-lang | 7 | 5 | ||||||||||
| Differing begin and end types in range-based for | P0184R0 | c++17-lang | 6 | 3.9 | 19.1* | 4.12 | ||||||||
| [[fallthrough]] attribute | P0188R1 | c++17-lang | 7 | 3.9 | 19.1* | |||||||||
| [[nodiscard]] attribute | P0189R1 | c++17-lang | 7 | 3.9 | ||||||||||
| Pack expansions in using-declarations | P0195R2 | c++17-lang | 7 | 4 | ||||||||||
| [[maybe_unused]] attribute | P0212R1 | c++17-lang | 7 | 3.9 | ||||||||||
| Structured Bindings | P0217R3 | c++17-lang | 7 | 4 | ||||||||||
| Hexadecimal floating-point literals | P0245R1 | c++17-lang | 3.0 | Yes | ||||||||||
| Ignore unknown attributes | P0283R2 | c++17-lang | Yes | 3.9 | ||||||||||
| constexpr if statements | P0292R2 | c++17-lang | 7 | 3.9 | ||||||||||
| init-statements for if and switch | P0305R1 | c++17-lang | 7 | 3.9 | ||||||||||
| Inline variables | P0386R2 | c++17-lang | 7 | 3.9 | ||||||||||
| DR: Matching of template template-arguments excludes compatible templates | P0522R0 | c++17-lang | 7 | 4 | ||||||||||
| std::uncaught_exceptions() | N4259 | c++17 | 6 | 3.7 | 19.0* | |||||||||
| Splicing Maps and Sets | P0083R3 | c++17 | 7 | |||||||||||
| Improving std::pair and std::tuple | N4387 | c++17 | Yes | 4 | 19.0* | N/A | N/A | |||||||
| std::shared_mutex (untimed) | N4508 | c++17 | 6 | 3.7 | 19.0* | N/A | N/A | |||||||
| Elementary string conversions | P0067R5 | c++17 | ||||||||||||
| C++ feature |
Paper(s) |
Version |
GCC |
Clang |
MSVC |
EDG eccp |
Intel C++ |
IBM XLC++ |
Sun/Oracle C++ |
Embarcadero C++ Builder |
Cray |
Portland Group (PGI) |
HP aCC |
Digital Mars C++ |
C++ 2014 features
| C++ 2014 feature |
Paper(s) |
Version |
GCC |
Clang |
MSVC |
EDG eccp |
Intel C++ |
IBM XLC++ |
Sun/Oracle C++ |
Embarcadero C++ Builder |
Cray |
Portland Group (PGI) |
HP aCC |
Digital Mars C++ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tweaked wording for contextual conversions | N3323 | c++14-lang | 4.9 | 3.4 | 18.0* | 4.9 | 16.0 | 13.1.2* | ||||||
| Binary literals | N3472 | c++14-lang | 4.3/4.9 | 2.9 | 19.0* | 4.10 | 11.0 | 13.1.2* | 5.14 | 2015 | ||||
| decltype(auto), Return type deduction for normal functions | N3638 | c++14-lang | 4.8/4.9 | 3.3/3.4 | 19.0* | 4.9 | 15.0 | 13.1.2* | ||||||
| Initialized/Generalized lambda captures (init-capture) | N3648 | c++14-lang | 4.5/4.9 | 3.4 | 19.0* | 4.10 | 15.0 | ? | ||||||
| Generic (polymorphic) lambda expressions | N3649 | c++14-lang | 4.9 | 3.4 | 19.0* | 4.10 | 16.0 | 13.1.2* | ? | |||||
| Variable templates | N3651 | c++14-lang | 5.0 | 3.4 | 19.0* | 4.11 | 17.0 | 13.1.2* | ||||||
| Extended constexpr | N3652 | c++14-lang | 5 | 3.4 | 19.1* | 4.11 | 17.0 | 13.1.2* | ||||||
| Member initializers and aggregates (NSDMI) | N3653 | c++14-lang | 5 | 3.3 | 19.1* | 4.9 | 16.0 | 5.14 | ||||||
| Clarifying memory allocation (avoiding/fusing allocations) | N3664 | c++14-lang | N/A | 3.4 | N/A | N/A | ||||||||
| Deprecated attribute | N3760 | c++14-lang | 4.9 | 3.4 | 19.0* | 4.9 | 15.0* 16.0 |
13.1.2* | 5.14 | |||||
| Sized deallocation | N3778 | c++14-lang | 5 | 3.4 | 19.0* | 4.10.1 | 17.0 | 5.14 | ||||||
| Single quote as digit separator | N3781 | c++14-lang | 4.9 | 3.4 | 19.0* | 4.10 | 16.0 | 13.1.2* | 5.14 | 2015 | ||||
| std::result_of and SFINAE | N3462 | c++14 | 5.0 | Yes | 19.0* | N/A | N/A | Yes | ||||||
constexpr for <complex>
|
N3302 | c++14 | 5.0 | 3.4 | 19.0* | N/A | N/A | |||||||
constexpr for <chrono>
|
N3469 | c++14 | 5.0 | 3.4 | 19.0* | N/A | N/A | |||||||
constexpr for <array>
|
N3470 | c++14 | 5.0 | 3.4 | 19.0* | N/A | N/A | |||||||
constexpr for <initializer_list>, <utility> and <tuple>
|
N3471 | c++14 | 5.0 | 3.4 | 19.0* | N/A | N/A | |||||||
| Improved std::integral_constant | N3545 | c++14 | 5.0 | 3.4 | 19.0* | N/A | N/A | |||||||
User-defined literals for <chrono> and <string>
|
N3642 | c++14 | 5.0 | 3.4 | 19.0* | N/A | N/A | |||||||
| Null forward iterators | N3644 | c++14 | 5.0* | 3.4 | 19.0* | N/A | N/A | |||||||
| std::quoted | N3654 | c++14 | 5.0 | 3.4 | 19.0* | N/A | N/A | |||||||
| Heterogeneous associative lookup | N3657 | c++14 | 5.0 | 3.4 | 19.0* | N/A | N/A | |||||||
| std::integer_sequence | N3658 | c++14 | 5.0 | 3.4 | 19.0* | N/A | N/A | |||||||
| std::shared_timed_mutex | N3659 | c++14 | 5.0 | 3.4 | 19.0* | N/A | N/A | |||||||
| std::exchange | N3668 | c++14 | 5.0 | 3.4 | 19.0* | N/A | N/A | |||||||
fixing constexpr member functions without const
|
N3669 | c++14 | 5.0 | 3.4 | 19.0* | N/A | N/A | |||||||
| std::get<T>() | N3670 | c++14 | 5.0 | 3.4 | 19.0* | N/A | N/A | |||||||
| Dual-Range std::equal, std::is_permutation, std::mismatch | N3671 | c++14 | 5.0 | 3.4 | 19.0* | N/A | N/A | |||||||
| C++ feature |
Paper(s) |
Version |
GCC |
Clang |
MSVC |
EDG eccp |
Intel C++ |
IBM XLC++ |
Sun/Oracle C++ |
Embarcadero C++ Builder |
Cray |
Portland Group (PGI) |
HP aCC |
Digital Mars C++ |
C++ 2011 features
| C++ 2011 feature |
Paper(s) |
Version |
GCC |
Clang |
MSVC |
EDG eccp |
Intel C++ |
IBM XLC++ |
Sun/Oracle C++ |
Embarcadero C++ Builder |
Cray |
Portland Group (PGI) |
HP aCC |
Digital Mars C++ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
alignas
|
N2341 | c++11 | 4.8 | 3.0 | 19.0* | 4.8 | 15.0 | 13.1.2* | 5.13 | Yes | 8.4 | 2015 | ||
alignof
|
N2341 | c++11 | 4.5 | 2.9 | 19.0* | 4.8 | 15.0 | 13.1.2* | 5.13 | Yes | 8.4 | 2015 | ||
| Atomic operations | N2427 | c++11 | 4.4 | 3.1 | 17.0* | Yes | 13.0 | 13.1.2* | 5.14 | Yes | 8.4 | 2015 | ||
auto
|
N1984(v1.0) | c++11 | 4.4(v1.0) | Yes | 16.0 (v0.9)* | 4.1(v0.9) | 11.0(v0.9) 12.0(v1.0) |
11.1(v1.0) | 5.13 | Yes | 8.4 | 2015 | A.06.25 | |
| C99 preprocessor | N1653 | 4.3 | Yes | 19.0* | 4.1 | 11.1 | 10.1 | 5.9 | Yes | 8.4 | 2015 | A.06.25 | Yes | |
constexpr
|
N2235 | c++11 | 4.6 | 3.1 | 19.0* | 4.6 | 13.0* 14.0 |
12.1* 13.1 |
5.13 | Yes | 8.4 | 2015 | A.06.28 | |
decltype
|
v1.0: N2343 v1.1: N3276 |
c++11 | 4.3(v1.0) 4.8.1(v1.1) |
2.9 | 16.0 (v1.1)* | 4.1(v1.0) | 11.0(v1.0) 12.0(v1.1) |
11.1(v1.0) | 5.13 | Yes | 8.4 | 2015 | A.06.25 | 8.52(v1.0) |
| Defaulted and deleted functions | N2346 | c++11 | 4.4 | 3.0 | 18.0* | 4.1 | 12.0 | 13.1 | 5.13 | Yes | 8.4 | 2015 | A.06.25 | |
| Delegating constructors | N1986 | c++11 | 4.7 | 3.0 | 18.0* | 4.7 | 14.0 | 11.1 | 5.13 | Yes | 8.4 | 2015 | A.06.28 | |
| Explicit conversion operators | N2437 | c++11 | 4.5 | 3.0 | 18.0* | 4.4 | 13.0 | 12.1 | 5.13 | Yes | 8.4 | 2015 | A.06.27 | |
| Extended friend declarations | N1791 | c++11 | 4.7 | 2.9 | 16.0* | 4.1 | 11.1* 12.0 |
11.1 | 5.13 | Yes | 8.4 | 2015 | A.06.25 | |
| extern template | N1987 | c++11 | 3.3 | Yes | 12.0* | 3.9 | 9.0 | 11.1 | 5.13 | Yes | 8.4 | 2015 | A.06.25 | |
| Forward enum declarations | N2764 | c++11 | 4.6 | 3.1 | 17.0* | 4.5 | 11.1* 14.0 |
12.1 | 5.13 | Yes | 8.4 | 2015 | ||
| Inheriting constructors | N2540 | c++11 | 4.8 | 3.3 | 19.0* | 4.8 | 15.0 | 13.1.1* | 5.13 | Yes | 8.4 | 2015 | ||
| Initializer lists | N2672 | c++11 | 4.4 | 3.1 | 18.0* | 4.5 | 13.0* 14.0 |
13.1.2* | 5.13 | Yes | 8.4 | 2015 | A.06.28 | |
| Lambda expressions | v0.9: N2550 |
c++11 | 4.5(v1.1) | 3.1 | 16.0* | 4.1(v1.1) | 12.0(v1.1) | 13.1.2* | 5.13 | Yes | 8.4 | 2015 | A.06.25 | |
| 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 | A.06.27 | ||
| long long | N1811 | c++11 | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | 8.4 | 2015 | Yes | Yes |
| Inline namespaces | N2535 | c++11 | 4.4 | 2.9 | 19.0* | 4.5 | 14.0 | 11.1 | 5.13 | Yes | 8.4 | 2015 | A.06.28 | |
| New character types | N2249 | c++11 | 4.4 | 2.9 | 19.0* | 4.4 | 12.1* 14.0 |
13.1.1* | 5.13 | Yes | 8.4 | 2015 | A.06.27 | 8.52 |
| Trailing function return types | N2541 | c++11 | 4.4 | 2.9 | 16.0* | 4.1 | 12.0 | 12.1 | 5.13 | Yes | 8.4 | 2015 | A.06.27 | |
| nullptr | N2431 | c++11 | 4.6 | 2.9 | 16.0* | 4.2 | 12.1 | 13.1 | 5.13 | Yes | 8.4 | 2015 | A.06.27 | 8.52 |
| Unicode string literals | N2442 | c++11 | 4.4 | 3.0 | 19.0* | 4.7 | 11.0* | 10.1* 13.1.1* |
5.7 | Yes | 8.4 | 2015 | A.06.28 | 8.52 |
| Raw string literals | N2442 | c++11 | 4.5 | Yes | 18.0* | 4.7 | 14.0 | 13.1.1* | 5.13 | Yes | 8.4 | 2015 | A.06.28 | 8.52 |
| User-defined literals | N2765 | c++11 | 4.7 | 3.1 | 19.0* | 4.8 | 15.0 | 13.1.2* | 5.14 | Yes | 8.4 | 2015 | ||
| Right angle brackets | N1757 | c++11 | 4.3 | Yes | 14.0* | 4.1 | 11.0 | 12.1 | 5.13 | Yes | 8.4 | 2015 | ||
| R-value references | v1.0: N2118 |
c++11 | 4.3(v1.0) 4.5(v2.1) 4.6(v3.0) |
Yes | 16.0* | 4.5(v3.0) | 11.1(v1.0) 12.0(v2.0) 14.0(v3.0) |
12.1(v2.1) | 5.13 | Yes | 8.4 | 2015 | A.06.25 | |
| static_assert | N1720 | c++11 | 4.3 | 2.9 | 16.0* | 4.1 | 11.0 | 11.1 | 5.13 | Yes | 8.4 | 2015 | A.06.25 | 8.52 |
| Strongly-typed enum | N2347 | c++11 | 4.4 | 2.9 | 17.0* | 4.0 | 13.0 | 12.1 | 5.13 | Yes | 8.4 | 2015 | A.06.25 | |
| Template aliases | N2258 | c++11 | 4.7 | 3.0 | 18.0* | 4.2 | 12.1 | 13.1.1* | 5.13 | Yes | 8.4 | 2015 | A.06.27 | |
| Thread-local storage | N2659 | c++11 | 4.4* 4.8 |
3.3* 3.3 |
19.0* | 4.8 | 11.1* 15.0* |
10.1* 13.1.2* |
5.9* | Yes | 8.4 | 2015 | 8.52* | |
| Unrestricted unions | N2544 | c++11 | 4.6 | 3.0 | 19.0* | 4.6 | 14.0* | 13.1.2* | 5.13 | Yes | 8.4 | 2015 | A.06.28 | |
| Type traits | N1836 | c++11 | 4.3 | 3.0 | 14.0* | 4.0 | 10.0 | 13.1.3 | 5.13 | Yes | 8.4 | 2015 | 6.16 | |
| Variadic templates | v0.9: N2242 v1.0: N2555 |
c++11 | 4.3(v0.9) 4.4(v1.0) |
2.9(v1.0) | 18.0* | 4.1(v0.9) | 12.1(v1.0) | 11.1(v0.9) | 5.13 | Yes | 8.4 | 2015 | A.06.27 | |
| Range-for loop | N2930 | c++11 | 4.6 | 3.0 | 17.0* | 4.5 | 13.0 | 13.1.2* | 5.13 | Yes | 8.4 | 2015 | A.06.28 | |
| override and final | v0.8: N2928 |
c++11 | 4.7 | 2.9 | 17.0* | 4.8(v1.0) | 12.0(v0.8) 14.0(v1.0) |
13.1.1* | 5.13 | Yes | 8.4 | 2015 | ||
| Attributes | N2761 | c++11 | 4.8 | 3.3 | 19.0* | 4.2 | 12.1 | 13.1.1* | 5.13 | Yes | 8.4 | 2015 | A.06.27 | |
| ref-qualifiers | N2439 | c++11 | 4.8.1 | 2.9 | 19.0* | 4.7 | 14.0 | 13.1.2* | 5.13 | Yes | 8.4 | 2015 | A.06.28 | |
| Non-static data member initializers | N2756 | c++11 | 4.7 | 3.0 | 18.0* | 4.6 | 14.0 | 13.1.2* | 5.13 | Yes | 8.4 | 2015 | A.06.28 | |
| Dynamic initialization and destruction with concurrency (magic statics) | N2660 | c++11 | 4.3 | 2.9 | 19.0* | Yes | 11.1* | 13.1.2* | 5.13 | Yes | 8.4 | 2015 | A.06.25 | |
| noexcept | N3050 | c++11 | 4.6 | 3.0 | 19.0* | 4.5 | 14.0 | 13.1.1* | 5.13 | Yes | 8.4 | 2015 | A.06.28 | |
| dynamic pointer safety (GC interface) | n2670 | c++11 | ||||||||||||
| Money, Time, and hexfloat I/O manipulators | [] | c++11 | 5.1 | 3.8 | 19.0* | |||||||||
| C++ feature |
Paper(s) |
Version |
GCC |
Clang |
MSVC |
EDG eccp |
Intel C++ |
IBM XLC++ |
Sun/Oracle C++ |
Embarcadero C++ Builder |
Cray |
Portland Group (PGI) |
HP aCC |
Digital Mars C++ |
C++ Post-2017
| C++ Post-2017 feature |
Paper(s) |
Version |
GCC |
Clang |
MSVC |
EDG eccp |
Intel C++ |
IBM XLC++ |
Sun/Oracle C++ |
Embarcadero C++ Builder |
Cray |
Portland Group (PGI) |
HP aCC |
Digital Mars C++ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| C++ feature |
Paper(s) |
Version |
GCC |
Clang |
MSVC |
EDG eccp |
Intel C++ |
IBM XLC++ |
Sun/Oracle C++ |
Embarcadero C++ Builder |
Cray |
Portland Group (PGI) |
HP aCC |
Digital Mars C++ |
* - 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 2016-06)
- GCC 6 release notes
- C++11 core language support status (complete as of 4.8.1)
- C++14 core language support status (complete as of 5.0)
- C++17 core language support status
- C++ core language support status (supersedes the above version-specific pages)
- C++11 library support status (complete as of 5.0)
- C++14 library support status (complete as of 5.0)
- Technical Specifications support status
- C++17 library support status
- Clang++ (Updated 2016-06)
- 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
- Core language defect report status
- C++17 library support status
- Microsoft Visual Studio (updated 2016-06)
- 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 2016-06)
- 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)
- Intel does not ship an implementation of the C++ standard library
- EDG (Updated 2016-01)
- C++11 core language support status
- C++14 core language support status
- C++17 core language support status
- EDG does not ship an implementation of the C++ standard library
- Oracle C++ (updated 2016-01)
-
- C++14 features added in 5.14
- Oracle ships three 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
- IBM XL C++ (updated 2015-12)
- C++11 core language support status (v 13.1 for AIX)
- IBM ships a version of Dinkumware library for AIX with full support for C++ TR1, including <regex>, but no C++11
- C++11 core language support status (v 13.1.1 for Linux)
- IBM does not ship an implementation of C++ standard library for Linux (uses GNU libstdc++)
- C++11/C++14 core language support status (v 13.1.2 for Little Endian Linux / zLinux Big Endian)
- HP aCC
- C++11 core language support status
- HP ships a version of RogueWave STL 2.0 implementation of the C++98 standard library
- Digital Mars C++
- Embarcadero C++
- C++11 core language support status (C++ Builder 10.1 Berlin for Windows 32/64, iOS and Android clang-enhanced compilers) [1]
- Cray (updated 2015-12)
- [2] For version 8.4, claims all of C++11 is supported except alignas
- Portland Group (PGI) (updated 2016-07)
- 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)"