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GKData.io MCP

The Rust Project · 1 min read

Rust Ownership and Borrowing: Lifetime Contracts

The Rust Book explains that each value has one owner, ownership can move, and the value is dropped when its owner leaves scope. Borrowing lets code access a value without taking ownership. References must remain valid, and the borrowing rules restrict conflicting changes.

Open the reference Implementation GuideReviewed 2026-10-12

How to use this reference

Describe which component owns each input buffer, which components borrow it, and when those borrows end. Prefer interfaces that express those relationships rather than relying on informal caller assumptions. Review ownership transfer and shared or exclusive borrowing as contracts between functions.

Before reading

  • Variables, functions, and scope
  • Basic stack and heap concepts

Context and limits

  • This is an introductory language model, not complete parser validation.
  • Unsafe operations and foreign-language interfaces add contracts requiring separate scrutiny. Wrapping an implementation in a safe interface does not replace proving its invariants.
  • The Unsafe Rust chapter is cited for its conceptual safety boundary and safe-abstraction guidance; no operational examples are reproduced.

Sources and provenance

  1. What is Ownership? The Rust Project · reviewed 2026-10-12
  2. References and Borrowing The Rust Project · reviewed 2026-10-12
  3. Unsafe Rust The Rust Project · reviewed 2026-10-12

Record reviewed 2026-10-12. Snapshot cb017eaea66e. Open the complete JSON contract.

GitHub snapshot 2026-10-12

cb017eaea66e · JSON exports & schemas · CC BY 4.0 content / MIT software