rust-clippy/tests/ui/drop_non_drop.rs

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#![warn(clippy::drop_non_drop)]
use core::mem::drop;
fn make_result<T>(t: T) -> Result<T, ()> {
Ok(t)
}
#[must_use]
fn must_use<T>(t: T) -> T {
t
}
fn drop_generic<T>(t: T) {
// Don't lint
drop(t)
}
fn main() {
struct Foo;
// Lint
drop(Foo);
// Don't lint
drop(make_result(Foo));
// Don't lint
drop(must_use(Foo));
struct Bar;
impl Drop for Bar {
fn drop(&mut self) {}
}
// Don't lint
drop(Bar);
struct Baz<T>(T);
// Lint
drop(Baz(Foo));
// Don't lint
drop(Baz(Bar));
}