Landing: 3ce3af99a166

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Project / Subsystem

gcc / gccrs

Date

2026-08-02

Author

Owen Avery

Commit

3ce3af99a166fff35636a4f58d3d7d90b2223ecb

Source

github

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Breaking

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All attributes

project: gcc
subsystem: gccrs
patch_id: —
commit_hash: 3ce3af99a166fff35636a4f58d3d7d90b2223ecb
source_type: github
headline: gccrs: Adjust SlicePattern and RestPattern handling
tldr: gccrs modifies AST handling for SlicePattern to better accommodate RestPatterns.
author: Owen Avery
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • gccrs
• AST
• pattern matching
• compiler
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/3ce3af99a166fff35636a4f58d3d7d90b2223ecb
date: 2026-08-02T00:00:00.000Z

GCC’s Rust front-end (gccrs) has refactored its Abstract Syntax Tree (AST) handling for SlicePattern and RestPattern. This change allows SlicePattern instances to represent multiple RestPattern children, simplifying the handling of potentially invalid patterns that are guarded by cfg attributes. The implications of RestPattern are now deferred until the HIR lowering stage, reducing complexity earlier in the compilation pipeline.