rust-clippy/tests/compile-fail/vec.rs

#![feature(plugin)]
#![plugin(clippy)]

#![deny(useless_vec)]

fn on_slice(_: &[u8]) {}
#[allow(ptr_arg)]
fn on_vec(_: &Vec<u8>) {}

fn main() {
    on_slice(&vec![]);
    //~^ ERROR useless use of `vec!`
    //~| HELP you can use
    //~| SUGGESTION on_slice(&[])
    on_slice(&[]);

    on_slice(&vec![1, 2]);
    //~^ ERROR useless use of `vec!`
    //~| HELP you can use
    //~| SUGGESTION on_slice(&[1, 2])
    on_slice(&[1, 2]);

    on_slice(&vec ![1, 2]);
    //~^ ERROR useless use of `vec!`
    //~| HELP you can use
    //~| SUGGESTION on_slice(&[1, 2])
    on_slice(&[1, 2]);

    on_slice(&vec!(1, 2));
    //~^ ERROR useless use of `vec!`
    //~| HELP you can use
    //~| SUGGESTION on_slice(&[1, 2])
    on_slice(&[1, 2]);

    on_slice(&vec![1; 2]);
    //~^ ERROR useless use of `vec!`
    //~| HELP you can use
    //~| SUGGESTION on_slice(&[1; 2])
    on_slice(&[1; 2]);

    on_vec(&vec![]);
    on_vec(&vec![1, 2]);
    on_vec(&vec![1; 2]);

    for a in vec![1, 2, 3] {
        //~^ ERROR useless use of `vec!`
        //~| HELP you can use
        //~| SUGGESTION for a in &[1, 2, 3] {
        println!("{}", a);
    }
}