Some people describe it as unsafe code "infecting" its containing module. This section of the nomicon goes into more detail: https://doc.rust-lang.org/nomicon/w

Some people describe it as unsafe code "infecting" its containing module. This section of the nomicon goes into more detail: https://doc.rust-lang.org/nomicon/working-with-unsafe.html https://doc.rust-lang.org/nomicon/working-with-unsafe.html