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rust-clippy/tests/ui/let_underscore_drop.rs

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#![warn(clippy::let_underscore_drop)]
struct Droppable;
impl Drop for Droppable {
fn drop(&mut self) {}
}
fn main() {
let unit = ();
let boxed = Box::new(());
let droppable = Droppable;
let optional = Some(Droppable);
let _ = ();
let _ = Box::new(());
let _ = Droppable;
let _ = Some(Droppable);
// no lint for reference
let _ = droppable_ref();
}
#[must_use]
fn droppable_ref() -> &'static mut Droppable {
unimplemented!()
}