rust-clippy/tests/ui/undropped_manually_drops.rs

26 lines
776 B
Rust

#![warn(clippy::undropped_manually_drops)]
struct S;
fn main() {
let f = std::mem::drop;
let g = std::mem::ManuallyDrop::drop;
let mut manual1 = std::mem::ManuallyDrop::new(S);
let mut manual2 = std::mem::ManuallyDrop::new(S);
let mut manual3 = std::mem::ManuallyDrop::new(S);
let mut manual4 = std::mem::ManuallyDrop::new(S);
// These lines will not drop `S` and should be linted
drop(std::mem::ManuallyDrop::new(S));
drop(manual1);
// FIXME: this line is not linted, though it should be
f(manual2);
// These lines will drop `S` and should be okay.
unsafe {
std::mem::ManuallyDrop::drop(&mut std::mem::ManuallyDrop::new(S));
std::mem::ManuallyDrop::drop(&mut manual3);
g(&mut manual4);
}
}