Landing: 654eb1f70643

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Project / Subsystem

gcc / c++

Date

2026-08-11

Author

Jason Merrill

Commit

654eb1f70643a2c57b3c6a31c250c1213a23aa4f

Source

github

Perf win

Breaking

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All attributes

project: gcc
subsystem: c++
patch_id: —
commit_hash: 654eb1f70643a2c57b3c6a31c250c1213a23aa4f
source_type: github
headline: C++: Avoid TARGET_EXPR for constexpr class access in generic lambdas
tldr: Improves constexpr evaluation in templates by preventing unnecessary internal expression wrappers.
author: Jason Merrill
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • c++
• compiler
• templates
• constexpr
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/654eb1f70643a2c57b3c6a31c250c1213a23aa4f
date: 2026-08-11T00:00:00.000Z

This change prevents the C++ compiler from using TARGET_EXPR to represent constexpr class values within template declarations. TARGET_EXPR is an internal implementation detail and not suitable for template code. By avoiding this wrapper when processing template declarations, the compiler ensures a cleaner representation of constant expressions, aligning with the goals of constexpr evaluation in templates.