Landing: bd02a048e92a
Project / Subsystem
gcc / libstdc++
Date
2026-05-26
Author
Tomasz Kamiński
Commit
bd02a048e92a778c2d3fcc011b8a88e1ac6f8183
Source
github
Perf win
No
Breaking
Yes
All attributes
- project
- gcc
- subsystem
- libstdc++
- patch_id
- —
- commit_hash
- bd02a048e92a778c2d3fcc011b8a88e1ac6f8183
- source_type
- github
- headline
- Libstdc++ Reverts to Dynamic Sizing for ref_view
- tldr
- The library now calculates the size of `ref_view` dynamically, reverting a change that made it statically sized and caused unexpected type changes.
- author
- Tomasz Kamiński
- outcome
- committed
- performance_win
- false
- breaking_change
- true
- series_id
- —
- series_parts
- []
- tags
-
- • libstdc++
- • ranges
- • ref_view
- • revert
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-05-26T00:00:00.000Z
The libstdc++ library reverted a change that made ref_view<R> statically sized, except for the introduction of ranges::__static_size. The static sizing led to unexpected changes in return types for functions like define_static_array, where the return type changed from span<const ...> to span<const ..., 10>. This behavior was deemed beyond the scope of implementation freedom and the change was reverted until P3928R0 is accepted.