mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-11-14 17:07:17 +00:00
cf8e95eb22
This will avoid `let_unit_value` in the examples in the ui-test. It might match too widely.
47 lines
1,003 B
Rust
47 lines
1,003 B
Rust
#![feature(plugin)]
|
|
#![plugin(clippy)]
|
|
|
|
#![warn(let_unit_value)]
|
|
#![allow(unused_variables)]
|
|
|
|
macro_rules! let_and_return {
|
|
($n:expr) => {{
|
|
let ret = $n;
|
|
}}
|
|
}
|
|
|
|
fn main() {
|
|
let _x = println!("x");
|
|
let _y = 1; // this is fine
|
|
let _z = ((), 1); // this as well
|
|
if true {
|
|
let _a = ();
|
|
}
|
|
|
|
consume_units_with_for_loop(); // should be fine as well
|
|
|
|
let_and_return!(()) // should be fine
|
|
}
|
|
|
|
// Related to issue #1964
|
|
fn consume_units_with_for_loop() {
|
|
// `for_let_unit` lint should not be triggered by consuming them using for loop.
|
|
let v = vec![(), (), ()];
|
|
let mut count = 0;
|
|
for _ in v {
|
|
count += 1;
|
|
}
|
|
assert_eq!(count, 3);
|
|
|
|
// Same for consuming from some other Iterator<()>.
|
|
let (tx, rx) = ::std::sync::mpsc::channel();
|
|
tx.send(()).unwrap();
|
|
count = 0;
|
|
for _ in rx.iter() {
|
|
count += 1;
|
|
}
|
|
assert_eq!(count, 1);
|
|
}
|
|
|
|
#[derive(Copy, Clone)]
|
|
pub struct ContainsUnit(()); // should be fine
|