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rust/rust-lang/reference/08c156565eb9fc1741d8bd97fd95116d9b66f4f8
commit
08c156565eb9fc1741d8bd97fd95116d9b66f4f8
[log]
author
Daniel Scherzer <daniel.e.scherzer@gmail.com>
Tue Jul 07 11:55:50 2026 -0700
committer
Daniel Scherzer <daniel.e.scherzer@gmail.com>
Tue Jul 07 12:18:02 2026 -0700
tree
6518f5416fdfa0efeb11fcb47102d819b44cb78d
parent
92ba1b77c8d3df511bb0a4cbaf0a10680f0a68c7 [diff]
Add guarantees regarding `repr(Rust)` structs and enums being ZSTs

New rule `layout.repr.rust.struct-zst` adds the guarantee that
`repr(Rust)` structs with no fields or all ZST fields are ZSTs.

New rule `layout.repr.rust.enum-struct-like-zst` adds the guarantee
that `repr(Rust)` enums with a single struct-like variant with no
fields or all ZST fields are ZSTs.

The glossary entry for ZSTs is expanded with references to these
guarantees and examples.
2 files changed
tree: 6518f5416fdfa0efeb11fcb47102d819b44cb78d
  1. .cargo/
  2. .github/
  3. dev-guide/
  4. docs/
  5. src/
  6. theme/
  7. tools/
  8. .gitattributes
  9. .gitignore
  10. book.toml
  11. Cargo.lock
  12. Cargo.toml
  13. CONTRIBUTING.md
  14. LICENSE-APACHE
  15. LICENSE-MIT
  16. README.md
  17. reference.md
  18. rust-toolchain.toml
  19. rustfmt.toml
  20. triagebot.toml
README.md

The Rust Language Reference

This document is the primary reference for the Rust programming language.

Contributor docs

See the Reference Developer Guide for information on contributing to the Reference.