mirror of
https://github.com/rust-lang/rust.git
synced 2024-12-12 08:36:03 +00:00
44 lines
1.0 KiB
Rust
44 lines
1.0 KiB
Rust
#![warn(clippy::double_must_use)]
|
|
#![allow(clippy::result_unit_err)]
|
|
|
|
#[must_use]
|
|
pub fn must_use_result() -> Result<(), ()> {
|
|
//~^ ERROR: this function has an empty `#[must_use]` attribute, but returns a type already
|
|
unimplemented!();
|
|
}
|
|
|
|
#[must_use]
|
|
pub fn must_use_tuple() -> (Result<(), ()>, u8) {
|
|
//~^ ERROR: this function has an empty `#[must_use]` attribute, but returns a type already
|
|
unimplemented!();
|
|
}
|
|
|
|
#[must_use]
|
|
pub fn must_use_array() -> [Result<(), ()>; 1] {
|
|
//~^ ERROR: this function has an empty `#[must_use]` attribute, but returns a type already
|
|
unimplemented!();
|
|
}
|
|
|
|
#[must_use = "With note"]
|
|
pub fn must_use_with_note() -> Result<(), ()> {
|
|
unimplemented!();
|
|
}
|
|
|
|
// vvvv Should not lint (#10486)
|
|
#[must_use]
|
|
async fn async_must_use() -> usize {
|
|
unimplemented!();
|
|
}
|
|
|
|
#[must_use]
|
|
async fn async_must_use_result() -> Result<(), ()> {
|
|
//~^ ERROR: this function has an empty `#[must_use]` attribute, but returns a type already
|
|
Ok(())
|
|
}
|
|
|
|
fn main() {
|
|
must_use_result();
|
|
must_use_tuple();
|
|
must_use_with_note();
|
|
}
|