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# Experimental C++ Features

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< cpp

The C++ standards committee publishes experimental C++ language and library extensions for future standardization.

Note: until 2012, these publications used the TR (technical report) format. Since 2012 ISO procedure changed to use the TS (technical specification) format.

ISO number | Name | Status | links
--- | --- | --- | ---
ISO/IEC TR 18015:2006 | Technical Report on C++ Performance | Published 2006 (ISO store) Draft: TR18015 (2006-02-15) | `std::hardware`
ISO/IEC TR 19768:2007 | Technical Report on C++ Library Extensions | Published 2007-11-15 (ISO store) Draft: n1745 (2005-01-17) ISO 29124 split off, the rest merged into C++11 |
ISO/IEC 29124:2010 | Extensions to the C++ Library to support mathematical special functions | Published 2010-09-03 (ISO Store) Final draft: n3060 (2010-03-06). Merged into C++17 | `special math`
ISO/IEC TR 24733:2011 | Extensions for the programming language C++ to support decimal floating-point arithmetic | Published 2011-10-25 (ISO Store) Draft: n2849 (2009-03-06) May be superseded by a future Decimal TS or merged into C++ by n3871 | `decimal32` `decimal64` `decimal128`
ISO/IEC TS 18822:2015 | C++ File System Technical Specification | Published 2015-06-18. (ISO store). Final draft: n4100 (2014-07-04). Merged into C++17. | `filesystem`
ISO/IEC TS 19570:2015 | C++ Extensions for Parallelism | Published 2015-06-24. (ISO Store). Final draft: n4507 (2015-05-05). Merged into C++17. | `parallelism`
ISO/IEC TS 19841:2015 | Transactional Memory TS | Published 2015-09-16, (ISO Store). Final draft: n4514 (2015-05-08) | transactional memory
ISO/IEC TS 19568:2015 | C++ Extensions for Library Fundamentals | Published 2015-09-30, (ISO Store). Final draft: n4480 (2015-04-07). Merged into C++17 except for invocation traits | `library extensions`
ISO/IEC TS 19217:2015 | C++ Extensions for Concepts | Published 2015-11-13. (ISO Store). Final draft: n4553 (2015-10-02) Current draft: n4641 (2017-02-05) | constraints and concepts
ISO/IEC TS 19571:2016 | C++ Extensions for Concurrency | Published 2016-01-19. (ISO Store) Final draft: p0159r0 (2015-10-22) | `concurrency`
ISO/IEC TS 19568:2017 | C++ Extensions for Library Fundamentals, Version 2 | Published 2017-03-30. (ISO Store) Draft: n4617 (2016-11-28) | `library extensions 2`
ISO/IEC DTS 21425:xxxx | Ranges TS | PDTS, Draft n4651 (2017-03-15) | `ranges`
ISO/IEC DTS 19216:xxxx | Networking TS | PDTS, Draft n4656 (2017-03-17) |
ISO/IEC DTS 22277:xxxx | Coroutines TS | PDTS. Draft n4649 (2017-03-03) |
ISO/IEC DTS 21544:xxxx | Modules TS | In development, Draft n4647 (2017-03-19) |
| Reflection | Early development. Draft p0194r2 (2016-10-15) with rationale in p0385r2 (2017-02-06). Alternative: p0590r0 (2017-02-05) |
| Numerics TS | Early development. Draft p0101 (2015-09-27) |
ISO/IEC DTS 19571:xxxx | Concurrency TS part 2 | Early development |
ISO/IEC DTS 19570:xxxx | Parallelism TS part 2 | Early development. Draft n4578 (2016-02-22) |
ISO/IEC DTS 19841:xxxx | Transactional Memory TS part 2 | Early development |
| Graphics TS | Early development. Draft p0267r4 (2017-03-20) |
ISO/IEC DTS 19569:xxxx | Array Extensions TS | Withdrawn. Abandoned draft: n3820 (2013-10-10) |

### [edit] See also

C documentation for Experimental C libraries

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