Landing: 7239744d25da
Project / Subsystem
gcc / libstdc++
Date
2026-04-24
Author
Tomasz Kamiński
Commit
7239744d25dadf39f431dfe38f3c03942acdb979
Source
github
Perf win
Yes
Breaking
No
All attributes
- project
- gcc
- subsystem
- libstdc++
- patch_id
- —
- commit_hash
- 7239744d25dadf39f431dfe38f3c03942acdb979
- source_type
- github
- headline
- Libstdc++: Make ref_view<R> statically sized if R has static size
- tldr
- Makes `ref_view<R>` statically sized when the underlying range `R` has a static size, avoiding runtime dereferences.
- author
- Tomasz Kamiński
- outcome
- committed
- performance_win
- true
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • libstdc++
- • ranges
- • static_size
- • optimization
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-04-24T00:00:00.000Z
This commit enhances the ref_view in libstdc++ to leverage static size information when available in the underlying range. The change introduces a ranges::__static_size helper function that returns the size of a statically-sized range. This allows ref_view to avoid potentially unsafe dereferences of pointer values at runtime when the size is known at compile time, enabling compile-time optimizations for ranges with static sizes.