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Rust · Concept

unsafe

Rust uses unsafe for operations whose memory-safety rules the compiler cannot verify. Unsafe blocks show that the programmer has checked those rules.

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Syntax

unsafe { /* unsafe operation */ }
unsafe fn name() { /* ... */ }
unsafe trait Name { /* ... */ }
unsafe impl Name for Type { /* ... */ }

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  • unsafe fn
  • unsafe trait
  • unsafe {}
  • unsafe impl
  • unsafe_op_in_unsafe_fn
  • raw pointers
  • union

Source: unsafe - Rust. Checked 2026-11-03.