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

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

#![deny(clippy)]
#![allow(dead_code)]

fn good(_one: u32, _two: u32, _three: &str, _four: bool, _five: f32, _six: f32, _seven: bool) {}

fn bad(_one: u32, _two: u32, _three: &str, _four: bool, _five: f32, _six: f32, _seven: bool, _eight: ()) {
    //~^ ERROR: this function has too many arguments (8/7)
}

trait Foo {
    fn good(_one: u32, _two: u32, _three: &str, _four: bool, _five: f32, _six: f32, _seven: bool);
    fn bad(_one: u32, _two: u32, _three: &str, _four: bool, _five: f32, _six: f32, _seven: bool, _eight: ());
    //~^ ERROR: this function has too many arguments (8/7)
}

struct Bar;

impl Bar {
    fn good_method(_one: u32, _two: u32, _three: &str, _four: bool, _five: f32, _six: f32, _seven: bool) {}
    fn bad_method(_one: u32, _two: u32, _three: &str, _four: bool, _five: f32, _six: f32, _seven: bool, _eight: ()) {}
    //~^ ERROR: this function has too many arguments (8/7)
}

// ok, we don’t want to warn implementations
impl Foo for Bar {
    fn good(_one: u32, _two: u32, _three: &str, _four: bool, _five: f32, _six: f32, _seven: bool) {}
    fn bad(_one: u32, _two: u32, _three: &str, _four: bool, _five: f32, _six: f32, _seven: bool, _eight: ()) {}
}

fn main() {}