2 Commits

Author SHA1 Message Date
Jan Kokemüller
134c915955
[libc++] Fix UB in <expected> related to "has value" flag (#68552) (#68733)
The calls to std::construct_at might overwrite the previously set
__has_value_ flag in the case where the flag is overlapping with
the actual value or error being stored (since we use [[no_unique_address]]).
To fix this issue, this patch ensures that we initialize the
__has_value_ flag after we call std::construct_at.

Fixes #68552
2023-10-30 14:56:03 -04:00
Hui Xie
e356f681f6 [libc++] Implement std::expected P0323R12
Implement `std::expected` https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p0323r12.html

Added tests

Differential Revision: https://reviews.llvm.org/D124516

address comment
2022-12-14 15:43:42 +00:00