Landing: 108fdf003e70

← All landings

Project / Subsystem

gcc / libstdc++

Date

2026-04-30

Author

Tomasz Kamiński

Commit

108fdf003e70643c921d9e40220c1312338e767c

Source

github

Perf win

Breaking

View on GitHub →

All attributes

project: gcc
subsystem: libstdc++
patch_id: —
commit_hash: 108fdf003e70643c921d9e40220c1312338e767c
source_type: github
headline: libstdc++: Remove duplicated __mdspan::__is_constant_wrapper.
tldr: Removes a duplicated `__is_constant_wrapper` in libstdc++, replacing it with `std::__is_constant_wrapper_v` from the `utility` header.
author: Tomasz Kamiński
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • libstdc++
• mdspan
• cleanup
• c++
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/108fdf003e70643c921d9e40220c1312338e767c
date: 2026-04-30T00:00:00.000Z

The __mdspan implementation in libstdc++ contained a duplicate of the __is_constant_wrapper utility. This commit removes the duplicated implementation and replaces its uses with std::__is_constant_wrapper_v from the <utility> header, thus avoiding code duplication.