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{{title|Experimental C++ Features}}
{{cpp/experimental/navbar}}

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.

{|table class=wikitable
|-
!ISO number||Name||Status||links
|-
| ISO/IEC TR 18015:2006
| Technical Report on C++ Performance
| Published 2006 ([https://www.iso.org/standard/43351.html ISO store]).
Draft: [http://www.open-std.org/jtc1/sc22/wg21/docs/TR18015.pdf TR18015] (2006-02-15).
| <!-- {{tt|std::hardware}} -->
|-
| ISO/IEC TR 19768:2007
| Technical Report on C++ Library Extensions
| Published 2007-11-15 ([https://www.iso.org/standard/43289.html ISO store]).
Draft: [http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1836.pdf n1836] (2005-06-24)<br>
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 ([https://www.iso.org/standard/50511.html ISO Store]).
Final draft: [http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2010/n3060.pdf n3060] (2010-03-06).<br>
{{mark_ok}}[[cpp/numeric/special_functions|Merged into C++17]].
| {{rl|special functions}}
|-
| ISO/IEC TR 24733:2011
| Extensions for the programming language C++ to support decimal floating-point arithmetic
| Published 2011-10-25 ([https://www.iso.org/standard/38843.html ISO Store])
Draft: [http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2009/n2849.pdf n2849] (2009-03-06).<br>
May be superseded by a future TS or merged into a future revision of C++ (most recent merge proposal was [http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n3871.html n3871]).
| <!-- {{tt|decimal32}}<br>{{tt|decimal64}}<br>{{tt|decimal128}} -->
|-
| ISO/IEC TS 18822:2015
| C++ File System Technical Specification
| Published 2015-06-18 ([https://www.iso.org/standard/63483.html ISO store]). Final draft: [http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4100.pdf n4100] (2014-07-04).<br>
{{mark_ok}}[[cpp/filesystem|Merged into C++17]].
| {{rl|fs|filesystem}}
|-
| ISO/IEC TS 19570:2015
| C++ Extensions for Parallelism
| Published 2015-06-24. ([https://www.iso.org/standard/65241.html ISO Store]). Final draft: [http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/n4507.pdf n4507] (2015-05-05).<br>
{{mark_ok}}Merged into C++17.
| {{rl|parallelism}}
|-
| ISO/IEC TS 19841:2015
| Transactional Memory TS
| Published 2015-09-16, ([https://www.iso.org/standard/66343.html ISO Store]). Final draft: [http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/n4514.pdf n4514] (2015-05-08).
| [[cpp/language/transactional_memory|transactional memory]]
|-
| ISO/IEC TS 19568:2015
| C++ Extensions for Library Fundamentals
| Published 2015-09-30, ([https://www.iso.org/standard/65238.html ISO Store]). Final draft: [http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/n4480.html n4480] (2015-04-07).<br>
{{mark_ok}}Merged into C++17 except for invocation traits.
|{{rl|lib_extensions|library extensions}}
|-
| ISO/IEC TS 19217:2015
| C++ Extensions for Concepts
| Published 2015-11-13 ([https://www.iso.org/standard/64031.html ISO Store]). Final draft: [http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/n4553.pdf n4553] (2015-10-02). Current draft: [http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0734r0.pdf p0734r0] (2017-07-14).<br>
{{mark_ok}}[[cpp/language/constraints|Merged into C++20]] (with modifications).
|{{rl|constraints|constraints and concepts}}
|-
| ISO/IEC TS 19571:2016
| C++ Extensions for Concurrency
| Published 2016-01-19 ([https://www.iso.org/standard/65242.html ISO Store]). Final draft: [http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/p0159r0.html p0159r0] (2015-10-22).<br>
{{mark_ok}}Partially merged into C++20.
| {{rl|concurrency}}
|-
| ISO/IEC TS 19568:2017
| C++ Extensions for Library Fundamentals, Version 2
| Published 2017-03-30 ([https://www.iso.org/standard/70587.html ISO Store]). Draft: [http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2016/n4617.pdf n4617] (2016-11-28).<br>
{{mark_ok}}Partially merged into C++17 and C++20.
| {{rl|lib_extensions_2|library extensions 2}}
|-
| ISO/IEC TS 21425:2017
| Ranges TS
| Published 2017-12-05 ([https://www.iso.org/standard/70910.html ISO Store]). Draft: [http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/n4685.pdf n4685] (2017-07-31).<br>
{{mark_ok}}[[cpp/ranges|Merged into C++20]].
| {{rl|ranges}}
|-
| ISO/IEC TS 22277:2017
| Coroutines TS
| Published 2017-12-05 ([https://www.iso.org/standard/73008.html ISO Store]). Draft [http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/n4736.pdf n4736] (2018-03-31). Latest draft: [http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/n4775.pdf n4775] (2018-10-07).<br>
{{mark_ok}}[[cpp/coroutine|Merged into C++20]].
|
|-
| ISO/IEC TS 19216:2018
| Networking TS
| Published 2018-04-24 ([https://www.iso.org/standard/64030.html ISO Store]). Draft [http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/n4734.pdf n4734] (2017-04-04). Latest draft: [http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/n4771.pdf n4771] (2018-10-08).
| {{rl|networking}}
|-
| ISO/IEC TS 21544:2018
| Modules TS
| Published 2018-05-16 ([https://www.iso.org/standard/71051.html ISO Store]). Final Draft [http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/n4720.pdf n4720] (2018-01-29).<br>
{{mark_ok}}[[cpp/language/modules|Merged into C++20]].
| 
|-
| ISO/IEC TS 19570:2018
| Parallelism TS Version 2
| Published 2018-11-15 ([https://www.iso.org/standard/70588.html ISO Store]). Final draft: [http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/n4793.pdf n4793] (2018-11-26).
Post-publication draft: [http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2019/n4808.pdf n4808] (2019-03-11).
| {{rl|parallelism 2}}
|-
| ISO/IEC TS 23619:2021
| Reflection TS
| Published 2021-10-11 ([https://www.iso.org/standard/76425.html ISO store]). Draft [http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2020/n4856.pdf n4856] (2020-03-02). Alternative draft [http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p1240r2.pdf p1240r2] (2022-01-15).
|{{rl|reflect|reflection}}
|-
|
| Numerics
| Early development. Draft [http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2020/p1889r1.pdf p1889r1] (2019-12-27).
| 
|-
| ISO/IEC AWI TS 9922
| Concurrency TS Version 2
| Early development. Draft [http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/n4895.pdf n4895] (2021-08-15).
| {{rl|concurrency 2}}
|-
| ISO/IEC AWI TS 19568
| C++ Extensions for Library Fundamentals, Version 3
| Early development. Draft [https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/n4920.html n4920] (2022-08-15).
| {{rl|lib_extensions_3|library extensions 3}}
|-
| ISO/IEC AWI TS 12907
| Transactional Memory TS, Version 2
| Early development: [http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/n4906.pdf n4906] (2022-02-14).
| 
|-
| 
| Pattern Matching
| Early development. Draft [http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2020/p1371r3.pdf p1371r3] (2020-09-15).
|
|-
| 
| Linear Algebra
| Early development. Draft [http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2020/p1385r6.pdf p1385r6] (2020-03-01) and [http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p1673r4.html p1673r4] (2021-08-15).
|
|-
| 
| 2D Graphics
| Early development. Draft [http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2019/p0267r10.pdf p0267r10] (2019-10-07).
|
|-
| ISO/IEC NP 19569
| Array Extensions TS
| {{mark_cancel}} Withdrawn. Abandoned draft: [http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3820.html n3820] (2013-10-10).
|
|}

===See also===
{{dsc begin}}
{{dsc see c | c/experimental | Experimental C features | nomono=true}}
{{dsc end}}

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