C++17

C++17 (also called C++1z) is the informal name for the future revision of the C++ ISO/IEC standard. The specification for the C++17 revision is under development and "nearly feature-complete"^[1] to be finished in 2017.

Expected features

• Addition of a default text message for static_assert^[2]
• Removal of trigraphs^[3][4]
• Allow typename in a template template parameter^[5]
• New rules for auto deduction from braced-init-list^[6][7]
• std::uncaught_exceptions, as a replacement of std::uncaught_exception^[8][9]
• Nested namespace definition^[7][10]
• Attributes for namespaces and enumerators^[9][11]
• UTF-8 character literals^[9][12]
• Constant evaluation for all non-type template arguments^[9][13]
• Folding expressions^[9][14]
• New insertion functions for std::map and std::unordered_map^[15][16]
• Uniform container access^[16][17]
• Definition of "Contiguous Iterators"^[16][18]
• Removal of some deprecated types and functions like std::auto_ptr, std::random_shuffle or old function adaptors^[19][7]
• A file system library based on boost::filesystem^[20]
• Parallel versions of STL algorithms^[21]
• Additional mathematical special functions^[22]
• Most of Library Fundamentals TS I^[23]

See also

• C++
• C++11
• C++14

References

1. Recent milestones: C++17 nearly feature-complete, second round of TSes now under development
2. "N3928: Extending static_assert, v2 (Walter E. Brown)" (PDF).
3. "N3981: Removing trigraphs??! (Richard Smith)". 2014-05-06.
4. IBM comment on preparing for a Trigraph-adverse future in C++17, IBM paper N4210, 2014-10-10. Authors: Michael Wong, Hubert Tong, Rajan Bhakta, Derek Inglis
5. "N4051: Allow typename in a template template parameter (Richard Smith)".
6. "N3922: New Rules for auto deduction from braced-init-list (James Dennett)".
7. "Updates to my trip report".
8. "N4259: Wording for std::uncaught_exceptions (Herb Sutter)" (PDF).
9. "New core language papers adopted for C++17".
10. "N4230: Nested namespace definition (Robert Kawulak, Andrew Tomazos)".
11. "N4266: Attributes for namespaces and enumerators (Richard Smith)".
12. "N4267: Adding u8 character literals (Richard Smith)".
13. "N4268: Allow constant evaluation for all non-type template arguments (Richard Smith)".
14. "N4295: Folding expressions (Andrew Sutton, Richard Smith)".
15. "N4279: Improved insertion interface for unique-key maps (Thomas Köppe)".
16. "New standard library papers adopted for C++17".
17. "N4280: Non-member size() and more (Riccardo Marcangelo)" (PDF).
18. "N4284: Contiguous Iterators (Jens Maurer)".
19. "N4190: Removing auto_ptr, random_shuffle(), And Old <functional> Stuff (Stephan T. Lavavej)".
20. "Filesystem Library Proposal (Beman Dawes)".
21. "The Parallelism TS Should be Standardized".
22. "Mathematical Special Functions for C++17, v5" (PDF).
23. "Adopt Library Fundamentals V1 TS Components for C++17 (R1)".