repr(int) enums: both size and sign matter #458
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RalfJung
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ehuss
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Thanks!
Might it also be a good idea to update https://github.com/rust-lang/reference/blob/72267820df5533a75505a81a97dba670334f0d57/src/type-layout.md#reprc-field-less-enums with the same wording?
Not sure -- that file is largely about the type's layout, which would not include the sign. The sign only matters for function call ABI. A file titled "type layout" seems like the wrong place to discuss that. |
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Aug 14, 2024
Update books ## rust-lang/book 7 commits in 67fa536768013d9d5a13f3a06790521d511ef711..04bc1396bb857f35b5dda1d773c9571e1f253304 2024-07-31 13:19:44 UTC to 2024-07-16 18:18:38 UTC - mdbook-trpl-listing: Add missing elided lifetimes (rust-lang/book#3995) - infra: include ghp-import and git push in generate-preview script (rust-lang/book#3998) - infra: add robots.txt for GH Pages previews (rust-lang/book#3997) - Clarify function definitions vs. expressions (rust-lang/book#3870) - infra: fix some shellcheck issues in CI config (rust-lang/book#3988) - infra: support test renderer in mdbook preprocessors (rust-lang/book#3982) - Improve handling of `<Listing>`s (rust-lang/book#3975) ## rust-lang/edition-guide 4 commits in 5454de3d12b9ccc6375b629cf7ccda8264640aac..aeeb287d41a0332c210da122bea8e0e91844ab3e 2024-08-06 21:16:24 UTC to 2024-07-29 21:41:36 UTC - Stabilize unsafe extern blocks (rust-lang/edition-guide#313) - Add chapter for Lifetime Capture Rules 2024 (rust-lang/edition-guide#316) - 2024: Add page for missing_fragment_specifier (rust-lang/edition-guide#315) - Add documentation for 2024 prelude migration. (rust-lang/edition-guide#314) ## rust-lang/nomicon 3 commits in 0ebdacadbda8ce2cd8fbf93985e15af61a7ab895..6ecf95c5f2bfa0e6314dfe282bf775fd1405f7e9 2024-08-11 16:55:29 UTC to 2024-08-09 23:25:22 UTC - Stabilize `min_exhaustive_patterns` (rust-lang/nomicon#445) - repr(int) enums: both size and sign matter (rust-lang/nomicon#458) - Update what-unsafe-does.md (rust-lang/nomicon#457) ## rust-lang/reference 6 commits in 2e191814f163ee1e77e2d6094eee4dd78a289c5b..62cd0df95061ba0ac886333f5cd7f3012f149da1 2024-08-11 21:06:12 UTC to 2024-07-30 06:34:03 UTC - Reformat (and only reformat) the inline assembly chapter (rust-lang/reference#1550) - Changes for unsafe extern blocks (RFC 3484) (rust-lang/reference#1536) - Stabilize Wasm relaxed SIMD (rust-lang/reference#1421) - Remove custom blockquote styling (rust-lang/reference#1547) - Fix std-links for generics with commas. (rust-lang/reference#1549) - Add details on how names are introduced. (rust-lang/reference#1052) ## rust-lang/rust-by-example 3 commits in 89aecb6951b77bc746da73df8c9f2b2ceaad494a..8f94061936e492159f4f6c09c0f917a7521893ff 2024-08-06 17:25:35 UTC to 2024-07-16 20:58:25 UTC - Update lifetime_bounds.md (rust-lang/rust-by-example#1869) - Remove the link to Japanese translation (rust-lang/rust-by-example#1868) - Add an example of implementing the FromStr trait for Circles. (rust-lang/rust-by-example#1865) ## rust-lang/rustc-dev-guide 12 commits in 0c4d55c..43d8378 2024-08-08 17:54:27 UTC to 2024-07-19 07:15:12 UTC - Added 'the' in chapter "Running test" subtitle "Run unit tests on the compiler/library" (rust-lang/rustc-dev-guide#2040) - Correct rust code block in *Dataflow Analysis* (rust-lang/rustc-dev-guide#2037) - linkcheck: fix filtering of the source files (rust-lang/rustc-dev-guide#2019) - chore: fix some comments (rust-lang/rustc-dev-guide#2028) - linkcheck: fix reported broken links (part 2) (rust-lang/rustc-dev-guide#2024) - typo (rust-lang/rustc-dev-guide#2029) - Fix broken links in `llvm-coverage-instrumentation.md` (rust-lang/rustc-dev-guide#2027) - Fix invalid link to toolstate documentation (rust-lang/rustc-dev-guide#2021) - linkcheck: fix reported broken links (part 1) (rust-lang/rustc-dev-guide#2022) - fix link (rust-lang/rustc-dev-guide#2020) - MIR docs: fix borked links and update style (rust-lang/rustc-dev-guide#2017) - Update adding.md (rust-lang/rustc-dev-guide#2016)
rust-timer
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Aug 15, 2024
Rollup merge of rust-lang#129015 - rustbot:docs-update, r=ehuss Update books ## rust-lang/book 7 commits in 67fa536768013d9d5a13f3a06790521d511ef711..04bc1396bb857f35b5dda1d773c9571e1f253304 2024-07-31 13:19:44 UTC to 2024-07-16 18:18:38 UTC - mdbook-trpl-listing: Add missing elided lifetimes (rust-lang/book#3995) - infra: include ghp-import and git push in generate-preview script (rust-lang/book#3998) - infra: add robots.txt for GH Pages previews (rust-lang/book#3997) - Clarify function definitions vs. expressions (rust-lang/book#3870) - infra: fix some shellcheck issues in CI config (rust-lang/book#3988) - infra: support test renderer in mdbook preprocessors (rust-lang/book#3982) - Improve handling of `<Listing>`s (rust-lang/book#3975) ## rust-lang/edition-guide 4 commits in 5454de3d12b9ccc6375b629cf7ccda8264640aac..aeeb287d41a0332c210da122bea8e0e91844ab3e 2024-08-06 21:16:24 UTC to 2024-07-29 21:41:36 UTC - Stabilize unsafe extern blocks (rust-lang/edition-guide#313) - Add chapter for Lifetime Capture Rules 2024 (rust-lang/edition-guide#316) - 2024: Add page for missing_fragment_specifier (rust-lang/edition-guide#315) - Add documentation for 2024 prelude migration. (rust-lang/edition-guide#314) ## rust-lang/nomicon 3 commits in 0ebdacadbda8ce2cd8fbf93985e15af61a7ab895..6ecf95c5f2bfa0e6314dfe282bf775fd1405f7e9 2024-08-11 16:55:29 UTC to 2024-08-09 23:25:22 UTC - Stabilize `min_exhaustive_patterns` (rust-lang/nomicon#445) - repr(int) enums: both size and sign matter (rust-lang/nomicon#458) - Update what-unsafe-does.md (rust-lang/nomicon#457) ## rust-lang/reference 6 commits in 2e191814f163ee1e77e2d6094eee4dd78a289c5b..62cd0df95061ba0ac886333f5cd7f3012f149da1 2024-08-11 21:06:12 UTC to 2024-07-30 06:34:03 UTC - Reformat (and only reformat) the inline assembly chapter (rust-lang/reference#1550) - Changes for unsafe extern blocks (RFC 3484) (rust-lang/reference#1536) - Stabilize Wasm relaxed SIMD (rust-lang/reference#1421) - Remove custom blockquote styling (rust-lang/reference#1547) - Fix std-links for generics with commas. (rust-lang/reference#1549) - Add details on how names are introduced. (rust-lang/reference#1052) ## rust-lang/rust-by-example 3 commits in 89aecb6951b77bc746da73df8c9f2b2ceaad494a..8f94061936e492159f4f6c09c0f917a7521893ff 2024-08-06 17:25:35 UTC to 2024-07-16 20:58:25 UTC - Update lifetime_bounds.md (rust-lang/rust-by-example#1869) - Remove the link to Japanese translation (rust-lang/rust-by-example#1868) - Add an example of implementing the FromStr trait for Circles. (rust-lang/rust-by-example#1865) ## rust-lang/rustc-dev-guide 12 commits in 0c4d55c..43d8378 2024-08-08 17:54:27 UTC to 2024-07-19 07:15:12 UTC - Added 'the' in chapter "Running test" subtitle "Run unit tests on the compiler/library" (rust-lang/rustc-dev-guide#2040) - Correct rust code block in *Dataflow Analysis* (rust-lang/rustc-dev-guide#2037) - linkcheck: fix filtering of the source files (rust-lang/rustc-dev-guide#2019) - chore: fix some comments (rust-lang/rustc-dev-guide#2028) - linkcheck: fix reported broken links (part 2) (rust-lang/rustc-dev-guide#2024) - typo (rust-lang/rustc-dev-guide#2029) - Fix broken links in `llvm-coverage-instrumentation.md` (rust-lang/rustc-dev-guide#2027) - Fix invalid link to toolstate documentation (rust-lang/rustc-dev-guide#2021) - linkcheck: fix reported broken links (part 1) (rust-lang/rustc-dev-guide#2022) - fix link (rust-lang/rustc-dev-guide#2020) - MIR docs: fix borked links and update style (rust-lang/rustc-dev-guide#2017) - Update adding.md (rust-lang/rustc-dev-guide#2016)
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The text makes it sound like only the size matters, but
i32andu32are not ABI-compatible so we have to talk about size and sign here.