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# Experimental C++ standard libraries

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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 19768:2007 | Technical Report on C++ Library Extensions | Published 2007-xx-xx (ISO store) Draft: n1745 (2005-01-17) TR 29124 split off, the rest merged into C++11 |
ISO/IEC TR 29124:2010 | Extensions to the C++ Library to support mathematical special functions | Published 2010-09-03 (ISO Store) Final draft: n3060 (2010-03-06) |
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C++ to support decimal floating-point arithmetic | Published 2011-10-25 (ISO Store) Draft: n2849 (2009-03-06 ) May be superseded by a future Decimal TS or merged into C++17 via n3871 |
ISO/IEC DTS 18822:2014 | C++ File System Technical Specification | DTS. Final draft: n4100 (2014-07-04) | `fs`
ISO/IEC PDTS 19568:xxxx | C++ Extensions for Library Fundamentals | PDTS. Draft: n4082 (2014-07-07) | `optional` `any` `basic_string_view` Polymorphic allocators
ISO/IEC PDTS 19570:xxxx | C++ Extensions for Parallelism | PDTS. Draft: n4104 (2014-07-04) |
ISO/IEC PDTS 19571:xxxx | C++ Extensions for Concurrency | In development: Draft: n4107 (2014-07-07) |
ISO/IEC PDTS 19217:xxxx | Concepts TS | In development. Draft: n4040 (2014-05-26) |
| C++ Extensions for Library Fundamentals, Version 2 | In development. Draft: n4084 (2014-07-06) | `not_fn`
ISO/IEC PDTS 19569:xxxx | Array Extensions TS | In development. Draft: n3820 (2013-10-10) |
| Transactional Memory TS | Early development, Draft: n3999 (2014-05-23) |
ISO/IEC PDTS 19216:xxxx | Networking TS | no working paper |

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