92 lines
1.1 KiB
Rust
92 lines
1.1 KiB
Rust
#![warn(clippy::let_underscore_must_use)]
|
|
|
|
// Debug implementations can fire this lint,
|
|
// so we shouldn't lint external macros
|
|
#[derive(Debug)]
|
|
struct Foo {
|
|
field: i32,
|
|
}
|
|
|
|
#[must_use]
|
|
fn f() -> u32 {
|
|
0
|
|
}
|
|
|
|
fn g() -> Result<u32, u32> {
|
|
Ok(0)
|
|
}
|
|
|
|
#[must_use]
|
|
fn l<T>(x: T) -> T {
|
|
x
|
|
}
|
|
|
|
fn h() -> u32 {
|
|
0
|
|
}
|
|
|
|
struct S {}
|
|
|
|
impl S {
|
|
#[must_use]
|
|
pub fn f(&self) -> u32 {
|
|
0
|
|
}
|
|
|
|
pub fn g(&self) -> Result<u32, u32> {
|
|
Ok(0)
|
|
}
|
|
|
|
fn k(&self) -> u32 {
|
|
0
|
|
}
|
|
|
|
#[must_use]
|
|
fn h() -> u32 {
|
|
0
|
|
}
|
|
|
|
fn p() -> Result<u32, u32> {
|
|
Ok(0)
|
|
}
|
|
}
|
|
|
|
trait Trait {
|
|
#[must_use]
|
|
fn a() -> u32;
|
|
}
|
|
|
|
impl Trait for S {
|
|
fn a() -> u32 {
|
|
0
|
|
}
|
|
}
|
|
|
|
fn main() {
|
|
let _ = f();
|
|
let _ = g();
|
|
let _ = h();
|
|
let _ = l(0_u32);
|
|
|
|
let s = S {};
|
|
|
|
let _ = s.f();
|
|
let _ = s.g();
|
|
let _ = s.k();
|
|
|
|
let _ = S::h();
|
|
let _ = S::p();
|
|
|
|
let _ = S::a();
|
|
|
|
let _ = if true { Ok(()) } else { Err(()) };
|
|
|
|
let a = Result::<(), ()>::Ok(());
|
|
|
|
let _ = a.is_ok();
|
|
|
|
let _ = a.map(|_| ());
|
|
|
|
let _ = a;
|
|
}
|