https://bugs.llvm.org/show_bug.cgi?id=48876
Bug ID: 48876
Summary: Implement standard concepts
Product: libc++
Version: unspecified
Hardware: All
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: All Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: cjdb...@gmail.com
CC: llvm-bugs@lists.llvm.org, mclow.li...@gmail.com
This bug tracks the implementation of concepts from [[concepts]][1].
## Success criteria
* All concepts in [concepts] are implemented.
* libc++ C++20 status notes show that [P0898][9] and relevant LWG issues are
completed.
## Concepts merged into libc++ at the time of filing
* [std::same_as][2] (D74291)
* [std::destructible][3] (D91004)
## Concepts with open patches in Phabricator
* [std::derived_from][4] (D74292)
* [Arithmetic concepts][5] (D88131)
* [std::constructible_from][6] (D91986)
* [std::default_initializable][7] (D93461)
## WIP patches
* [std::convertible_to][8] (D77961)
[1]: http://wg21.link/concepts
[2]: http://wg21.link/concept.same
[3]: http://wg21.link/concept.destructible
[4]: http://wg21.link/concept.derived
[5]: http://wg21.link/concepts.arithmetic
[6]: http://wg21.link/concept.constructible
[7]: http://wg21.link/concept.default.init
[8]: http://wg21.link/concept.convertible
[9]: http://wg21.link/p0898
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