pub static UNSAFE_ATTR_OUTSIDE_UNSAFE: &Lint
Expand description
The unsafe_attr_outside_unsafe
lint detects a missing unsafe keyword
on attributes considered unsafe.
§Example
#![warn(unsafe_attr_outside_unsafe)]
#[no_mangle]
extern "C" fn foo() {}
fn main() {}
{{produces}}
§Explanation
Some attributes (e.g. no_mangle
, export_name
, link_section
– see
issue #82499 for a more complete list) are considered “unsafe” attributes.
An unsafe attribute must only be used inside unsafe(…).
This lint can automatically wrap the attributes in unsafe(...)
, but this
obviously cannot verify that the preconditions of the unsafe
attributes are fulfilled, so that is still up to the user.
The lint is currently “allow” by default, but that might change in the future.