Landing: 7f4cc8140e3e
Project / Subsystem
gcc / libstdc++
Date
2026-04-27
Author
Jakub Jelinek
Commit
7f4cc8140e3eae85e77c755fc14991456649af7e
Source
github
Perf win
No
Breaking
No
All attributes
- project
- gcc
- subsystem
- libstdc++
- patch_id
- —
- commit_hash
- 7f4cc8140e3eae85e77c755fc14991456649af7e
- source_type
- github
- headline
- Libstdc++: Fixes std::is_scalar for std::meta::info.
- tldr
- `std::is_scalar` now correctly identifies `std::meta::info` as a scalar type, as required by the C++ standard.
- author
- Jakub Jelinek
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • libstdc++
- • type_traits
- • reflection
- • c++
- • std::is_scalar
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-04-27T00:00:00.000Z
std::is_scalar was updated to correctly handle std::meta::info as a scalar type when reflection is enabled (__cpp_impl_reflection >= 202506L). The standard dictates that std::meta::info and its cv-qualified versions are scalar types. This patch adds a check for is_reflection in the implementation of std::is_scalar to align with the standard. A new test was added to verify the fix.