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Unsafety

Unsafe operations are those that potentially violate the memory-safety guarantees of Rust's static semantics.

The following language level features cannot be used in the safe subset of Rust:

  • Dereferencing a raw pointer.
  • Reading or writing a mutable static variable.
  • Reading a field of a union, or writing to a field of a union that isn't Copy.
  • Calling an unsafe function (including an intrinsic or foreign function).
  • Implementing an unsafe trait.

© 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/reference/unsafety.html