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Learn unsafe Rust

This project is currently a work in progress.

This repository holds the mdbook source for Learn unsafe Rust, a compassionate and comprehensive resource for learning unsafe Rust. To that end, it:

  • Links to authoritative external documentation on unsafe operations.
  • Explains technical documentation with prose and supporting information.
  • Provides examples and case studies that relate to real-world applications.

Structure

Learn unsafe Rust is structured into three major sections:

  1. Core unsafety: an introduction using semantics of concrete machines
    • Invalid values
    • Dangling and unaligned pointers
    • Data races
    • Intrinsics
    • ABI and FFI
    • Platform features
    • Inline assembly
  2. Advanced unsafety: a more complete view of unsafety in abstract machines
    • Pointer aliasing
    • Immutable data
    • Atomic ordering
    • Undef memory
    • Pinning
    • Variance
  3. Expert unsafety: non-standard and experimental unsafety
    • Stacked borrows
    • Pointer provenance

Contributing

See our CONTRIBUTING file for directions on how to contribute.

Learn unsafe Rust accepts issues and PRs filed against this repository. Good topics of contribution include:

  • Adding, removing, or revising content in the book.
  • Methods used to generate artifacts from the book.

Learn unsafe Rust is written primarily in markdown and compiled using mdBook. See the mdBook User Guide for information on installing and using mdBook.

In order to keep activity relevant and narrowly-focused, the following activity is discouraged:

  • Nontrivial discussions regarding soundness and undefined behavior. These should be moved to more public and relevant repositories, and the discussion should be linked to from here. For example, the UCG working group repository is a good place for discussions about unsafe code.
  • Experimental unsafety topics that do not have substantial documentation. Because experimental topics are volatile and liable to change, it's a bad idea to invest effort where it's prone to be wasted.

Disclaimer

Learn unsafe Rust is not an officially-supported Google project.