rust-clippy/tests/ui/toplevel_ref_arg.rs

41 lines
895 B
Rust

//@aux-build:proc_macros.rs
#![warn(clippy::toplevel_ref_arg)]
#![allow(clippy::uninlined_format_args, unused, clippy::useless_vec)]
extern crate proc_macros;
use proc_macros::{external, inline_macros};
#[inline_macros]
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
inline!(let ref _y = 42;);
// do not lint in external macro
external!(let ref _y = 42;);
fn f(#[allow(clippy::toplevel_ref_arg)] ref x: i32) {}
}