Mention that “every address” ≠ “every pointer” #1761
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This adds a note in case people are tempted to interpret “`usize` ... can represent every memory address” as saying that pointer→usize→pointer roundtrips are definitely okay. Since the reference does not yet discuss provenance and that’s a much larger matter, I have merely linked to relevant existing documentation inside and outside the reference.
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cc @rust-lang/opsem |
traviscross
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Mar 20, 2025
Co-authored-by: Josh Triplett <josh@joshtriplett.org>
RalfJung
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Mar 20, 2025
Co-authored-by: Ralf Jung <post@ralfj.de>
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Mar 24, 2025
Update books ## rust-lang/book 23 commits in 81a976a237f84b8392c4ce1bd5fd076eb757a2eb..45f05367360f033f89235eacbbb54e8d73ce6b70 2025-03-21 23:23:52 UTC to 2025-03-13 14:14:37 UTC - Ch. 21: call out Chrome multiple-connections issue (rust-lang/book#4297) - Ch. 16: refactor 16-6 to using listing component (rust-lang/book#4295) - Ch. 01: Show how to work offline (rust-lang/book#4294) - Ch. 07: Clarify sentences about `pub use` (rust-lang/book#4293) - Ch. 02: Consistent ordering of `use` statements (rust-lang/book#4292) - Anchors on listings (rust-lang/book#4271) - Ch. 17: another tweak to how we phrase things about sections (rust-lang/book#4288) - Ch. 20: correct listing number (rust-lang/book#4287) - Ch. 10.3: clarify language detail (rust-lang/book#4284) - Ch. 17: minor typos and link reference (rust-lang/book#4286) - Ch. 9: correctly demonstrate privacy with module (rust-lang/book#4282) - Ch. 18: correct discussion of delegation in `Post` methods (rust-lang/book#4281) - Ch. 20: tell folks to see the Reference for more ABI info (rust-lang/book#4165) - Ch 10.1 minor clarifications (rust-lang/book#4256) - Clarified the misunderstanding b/w crates, module, items (rust-lang/book#4232) - Ferris: always show, even when it’s small (rust-lang/book#4280) - Ch. 17: mention `use std::pin::{Pin, pin};` on introduction (rust-lang/book#4279) - Persist printing error, NOT ErrorKind (rust-lang/book#4259) - Typo: "2" should be "2 seconds" (rust-lang/book#4263) - Ch. 17: fix tiny example consistency issue (rust-lang/book#4270) - Bump ring from 0.17.8 to 0.17.13 in /listings/ch17-async-await/listing-17-02 (rust-lang/book#4261) - Bump ring from 0.17.8 to 0.17.14 in /packages/trpl (rust-lang/book#4273) - 2024 Print Edition: updates to Word docs and more fixes to Markdown text (rust-lang/book#4272) ## rust-lang/reference 5 commits in dda31c85f2ef2e5d2f0f2f643c9231690a30a626..e95ebdfee02514d93f79ec92ae310a804e87f01f 2025-03-24 15:56:46 UTC to 2025-03-18 02:25:06 UTC - Fix diagnostic attribute typo (rust-lang/reference#1767) - Mention that “every address” ≠ “every pointer” (rust-lang/reference#1761) - Rework range pattern rules (rust-lang/reference#1756) - Use warning block in behavior-considered-undefined (rust-lang/reference#1759) - Add reference for asm-goto (rust-lang/reference#1693)
rust-timer
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Mar 24, 2025
Rollup merge of rust-lang#138894 - rustbot:docs-update, r=ehuss Update books ## rust-lang/book 23 commits in 81a976a237f84b8392c4ce1bd5fd076eb757a2eb..45f05367360f033f89235eacbbb54e8d73ce6b70 2025-03-21 23:23:52 UTC to 2025-03-13 14:14:37 UTC - Ch. 21: call out Chrome multiple-connections issue (rust-lang/book#4297) - Ch. 16: refactor 16-6 to using listing component (rust-lang/book#4295) - Ch. 01: Show how to work offline (rust-lang/book#4294) - Ch. 07: Clarify sentences about `pub use` (rust-lang/book#4293) - Ch. 02: Consistent ordering of `use` statements (rust-lang/book#4292) - Anchors on listings (rust-lang/book#4271) - Ch. 17: another tweak to how we phrase things about sections (rust-lang/book#4288) - Ch. 20: correct listing number (rust-lang/book#4287) - Ch. 10.3: clarify language detail (rust-lang/book#4284) - Ch. 17: minor typos and link reference (rust-lang/book#4286) - Ch. 9: correctly demonstrate privacy with module (rust-lang/book#4282) - Ch. 18: correct discussion of delegation in `Post` methods (rust-lang/book#4281) - Ch. 20: tell folks to see the Reference for more ABI info (rust-lang/book#4165) - Ch 10.1 minor clarifications (rust-lang/book#4256) - Clarified the misunderstanding b/w crates, module, items (rust-lang/book#4232) - Ferris: always show, even when it’s small (rust-lang/book#4280) - Ch. 17: mention `use std::pin::{Pin, pin};` on introduction (rust-lang/book#4279) - Persist printing error, NOT ErrorKind (rust-lang/book#4259) - Typo: "2" should be "2 seconds" (rust-lang/book#4263) - Ch. 17: fix tiny example consistency issue (rust-lang/book#4270) - Bump ring from 0.17.8 to 0.17.13 in /listings/ch17-async-await/listing-17-02 (rust-lang/book#4261) - Bump ring from 0.17.8 to 0.17.14 in /packages/trpl (rust-lang/book#4273) - 2024 Print Edition: updates to Word docs and more fixes to Markdown text (rust-lang/book#4272) ## rust-lang/reference 5 commits in dda31c85f2ef2e5d2f0f2f643c9231690a30a626..e95ebdfee02514d93f79ec92ae310a804e87f01f 2025-03-24 15:56:46 UTC to 2025-03-18 02:25:06 UTC - Fix diagnostic attribute typo (rust-lang/reference#1767) - Mention that “every address” ≠ “every pointer” (rust-lang/reference#1761) - Rework range pattern rules (rust-lang/reference#1756) - Use warning block in behavior-considered-undefined (rust-lang/reference#1759) - Add reference for asm-goto (rust-lang/reference#1693)
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This adds a note in case people are tempted to interpret “
usize... can represent every memory address” as saying that pointer→usize→pointer roundtrips are definitely okay. Since the reference does not yet discuss provenance and that’s a much larger matter, I have merely linked to relevant existing documentation inside and outside the reference.