rust-clippy/tests/ui/toplevel_ref_arg.rs

50 lines
840 B
Rust

// run-rustfix
// aux-build:macro_rules.rs
#![warn(clippy::toplevel_ref_arg)]
#[macro_use]
extern crate macro_rules;
macro_rules! gen_binding {
() => {
let ref _y = 42;
};
}
fn main() {
// Closures should not warn
let y = |ref x| println!("{:?}", x);
y(1u8);
let ref _x = 1;
let ref _y: (&_, u8) = (&1, 2);
let ref _z = 1 + 2;
let ref mut _z = 1 + 2;
let (ref x, _) = (1, 2); // ok, not top level
println!("The answer is {}.", x);
let ref _x = vec![1, 2, 3];
// Make sure that allowing the lint works
#[allow(clippy::toplevel_ref_arg)]
let ref mut _x = 1_234_543;
// ok
for ref _x in 0..10 {}
// lint in macro
#[allow(unused)]
{
gen_binding!();
}
// do not lint in external macro
{
ref_arg_binding!();
}
}