New upstream version 1.52.1+dfsg1

[rustc.git] / src / tools / clippy / tests / ui / dlist.rs

#![feature(associated_type_defaults)]
#![warn(clippy::linkedlist)]
#![allow(dead_code, clippy::needless_pass_by_value)]

extern crate alloc;
use alloc::collections::linked_list::LinkedList;

trait Foo {
    type Baz = LinkedList<u8>;
    fn foo(_: LinkedList<u8>);
    const BAR: Option<LinkedList<u8>>;
}

// Ok, we don’t want to warn for implementations; see issue #605.
impl Foo for LinkedList<u8> {
    fn foo(_: LinkedList<u8>) {}
    const BAR: Option<LinkedList<u8>> = None;
}

struct Bar;
impl Bar {
    fn foo(_: LinkedList<u8>) {}
}

pub fn test(my_favourite_linked_list: LinkedList<u8>) {
    println!("{:?}", my_favourite_linked_list)
}

pub fn test_ret() -> Option<LinkedList<u8>> {
    unimplemented!();
}

pub fn test_local_not_linted() {
    let _: LinkedList<u8>;
}

fn main() {
    test(LinkedList::new());
    test_local_not_linted();
}