Landing: 253edd7c2fc1

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Project / Subsystem

gcc / gccrs

Date

2026-06-22

Author

Philip Herron

Commit

253edd7c2fc10b58ed3194b6913a432643abb3d9

Source

github

Perf win

Breaking

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All attributes

project: gcc
subsystem: gccrs
patch_id: —
commit_hash: 253edd7c2fc10b58ed3194b6913a432643abb3d9
source_type: github
headline: gccrs: Implement proper generic associated types
tldr: GCC's Rust frontend now supports generic associated types (GATs) using projection types.
author: Philip Herron
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • gccrs
• Rust
• generics
• associated types
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/253edd7c2fc10b58ed3194b6913a432643abb3d9
date: 2026-06-22T00:00:00.000Z

This significant change in gccrs implements generic associated types (GATs) by utilizing projection types. This approach avoids mutating associated type placeholders and allows GATs to compose correctly through substitution and unification, fixing Rust-GCC#4293.