Hello, I have an API that I'm designing, and I'd like to generate the same warning you get if you don't check the value of send() from a std::sync::mpsc::Sender. Is there a pragma I can use to generate such warnings, or even make them errors?
fn a() -> Result<(),()> {
Ok(())
}
#[must_use]
struct B;
fn b() -> B {
B
}
fn main() {
a();
b();
}
warning: unused result which must be used, #[warn(unused_must_use)] on by default
--> <anon>:13:5
|
13 | a();
| ^^^^
warning: unused result which must be used, #[warn(unused_must_use)] on by default
--> <anon>:14:5
|
14 | b();
| ^^^^
1 Like
Does #[must_use]
work on a trait, making structs which impl that trait #[must_use]
?
No.