Landing: 94b37910f620
Project / Subsystem
gcc / libstdc++
Date
2026-04-28
Author
Tomasz Kamiński
Commit
94b37910f620ecafe6526bfd37722a86517c3f0d
Source
github
Perf win
Yes
Breaking
No
All attributes
- project
- gcc
- subsystem
- libstdc++
- patch_id
- —
- commit_hash
- 94b37910f620ecafe6526bfd37722a86517c3f0d
- source_type
- github
- headline
- libstdc++: Make pointer_traits::pointer_to constexpr for main template.
- tldr
- The `pointer_traits::pointer_to` function in libstdc++ is now `constexpr` since C++20, allowing compile-time evaluation.
- author
- Tomasz Kamiński
- outcome
- committed
- performance_win
- true
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • libstdc++
- • constexpr
- • c++20
- • templates
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-04-28T00:00:00.000Z
This commit makes pointer_traits::pointer_to constexpr for the main template in libstdc++, aligning with the resolution of LWG3454 from the C++ standard. This change enables compile-time evaluation of pointer_to when used with pointer types in C++20 and later. A new test case is added to verify the constexpr behavior with custom pointer-like types.