# Experimental C standard libraries

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< c

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 19769:2004 | Extensions to support new character data types | Published (ISO store) Final draft: n1040 (2003-11-07) Merged into C11 |
ISO/IEC TR 24731-1:2007 | Bounds-checking interfaces | Published (ISO store) Final draft: n1225 (2007-03-28) Merged into C11 |
ISO/IEC TR 18037:2008 | Extensions to support embedded processors | Published (ISO store) Final draft: n1169 (2006-04-04) |
ISO/IEC TR 24732:2009 | Extensions to support to support decimal floating-point arithmetic | Published (ISO store) Final draft: n1241 (2007-07-05) Superseded by TS 18661-2:2015 |
ISO/IEC 24747:2009 | Extensions to support mathematical special functions | Published (ISO store) Draft: n1182 (2006-08-02) |
ISO/IEC TR 24731-2:2010 | Extensions to support dynamic allocation functions | Published 2010-11-24 (ISO store) Draft: n1248 (2007-08-15) | dynamic
ISO/IEC TS 17961:2013 | Secure coding rules | Published 2013-11-15 (ISO store) Draft: n1624 (2012-06-26) TC1 published 2016-08-09 (ISO store) |
ISO/IEC TS 18661-1:2014 | Floating-point extensions: Binary floating-point arithmetic | Published 2014-07-21 (ISO store) Draft: n1778 (2013-11-05) | fpext1
ISO/IEC TS 18661-2:2015 | Floating-point extensions: Decimal floating-point arithmetic | Published 2015-02-11, Revised 2015-05-18 (ISO store). Post-publication draft: n1912 (2015-03-09) |
ISO/IEC TS 18661-3:2015 | Floating-point extensions: Interchange and extended types | Published 2015-10-06 (ISO store) Draft: n1945 (2014-06-10) |
ISO/IEC TS 18661-4:2015 | Floating-point extensions: Supplementary functions | Published 2015-10-06 (ISO store) Draft: n1950 (2015-06-10) | fpext4
ISO/IEC TS 18661-5:2016 | Floating-point extensions: Supplementary attributes | Published 2016-08-11 (ISO store) Draft: n2004 (2016-03-07) |
ISO/IEC TR 24772-3 | Vulnerability descriptions for the programming language C | Draft n2018 (2016-03-08) |
ISO/IEC TS 21938-1 | Parallel extensions part 1: Thread-based parallelism | Early draft: n2017 (2016-03-10) |
| Parallel extensions part 2: Vector-based parallelism | early development |
| Transactional Memory TS | Early draft: n1961 (2015-09-23) |
ISO/IEC TS 17961:xxxx | Secure coding rules part 2 | Early development, estimated publication 2023, possibly as an IS rather than TS |

### See also

C++ documentation for Experimental C++ libraries

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