Rust project goals: Immobile types and guaranteed destructors
Today Rust assumes all types can be moved (relocated in memory) and forgotten (via mem::forget). We will introduce traits like Move and Forget that make these capabilities explicit, allowing types to opt out. This follows the precedent set by the Sized hierarchy work, which relaxes the assumption that all types have a compile-time-known size.
- ▪Today Rust assumes all types can be moved (relocated in memory) and forgotten (via mem::forget).
- ▪We will introduce traits like Move and Forget that make these capabilities explicit, allowing types to opt out.
- ▪This follows the precedent set by the Sized hierarchy work, which relaxes the assumption that all types have a compile-time-known size.
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| Original publisher | GitHub |
| Canonical URL | https://github.com/rust-lang/rust-project-goals/blob/main/src/2026/move-trait.md |
| Publication time | Mon, 03 Aug 2026 06:42:00 +0000 |
| Retrieval time | 2026-08-03T07:10:42.789Z |
| Last seen | 2026-08-03T07:10:43.008Z |
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| Cluster | Xeiq9JQDyGtU · 1 stories |
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Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
Immobile types and guaranteed destructors Metadata Point of contact @lcnr Status Accepted What and why Let types opt out of being moved or forgotten, enabling scoped spawn, async drop, and pin-by-default Timespan 2026-2027 Roadmap Just add async Roadmap Rust for Linux Tracking issue [#635] Other tracking issues [rust-lang/rust#149607] Zulip channel #t-lang/move-trait [types] champion @lcnr [lang] champion @jackh726 Summary We propose to introduce new traits that describe what operations are possible on a type. Today Rust assumes all types can be moved (relocated in memory) and forgotten (via mem::forget). We will introduce traits like Move and Forget that make these capabilities explicit, allowing types to opt out.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at GitHub.