Landing: 955316dfc2af

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Project / Subsystem

gcc / libstdc++

Date

2026-05-15

Author

Tomasz Kamiński

Commit

955316dfc2af3cc5e7bf6b6418f7a2e60820f89f

Source

github

Perf win

Yes

Breaking

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All attributes

project: gcc
subsystem: libstdc++
patch_id: —
commit_hash: 955316dfc2af3cc5e7bf6b6418f7a2e60820f89f
source_type: github
headline: libstdc++: Add begin, end, (const_)iterator members to valarray.
tldr: Implements P3016R6 by adding iterator support to `std::valarray` in libstdc++.
author: Tomasz Kamiński
outcome: committed
performance_win: true
breaking_change: false
series_id: —
series_parts: []
tags: • libstdc++
• valarray
• iterators
• C++23
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/955316dfc2af3cc5e7bf6b6418f7a2e60820f89f
date: 2026-05-15T00:00:00.000Z

The std::valarray class in libstdc++ now supports iterators via the begin() and end() member functions, as well as iterator and const_iterator typedefs. This implementation is based on sections 4.3, 4.4, and 4.5 of P3016R6, and is enabled when __glibcxx_valarray >= 202511L. A new test case verifies the functionality.