| #![allow(unused, clippy::many_single_char_names, clippy::redundant_clone)] |
| #![warn(clippy::ptr_arg)] |
| |
| use std::borrow::Cow; |
| |
| fn do_vec(x: &Vec<i64>) { |
| //Nothing here |
| } |
| |
| fn do_vec_mut(x: &mut Vec<i64>) { |
| // no error here |
| //Nothing here |
| } |
| |
| fn do_str(x: &String) { |
| //Nothing here either |
| } |
| |
| fn do_str_mut(x: &mut String) { |
| // no error here |
| //Nothing here either |
| } |
| |
| fn main() {} |
| |
| trait Foo { |
| type Item; |
| fn do_vec(x: &Vec<i64>); |
| fn do_item(x: &Self::Item); |
| } |
| |
| struct Bar; |
| |
| // no error, in trait impl (#425) |
| impl Foo for Bar { |
| type Item = Vec<u8>; |
| fn do_vec(x: &Vec<i64>) {} |
| fn do_item(x: &Vec<u8>) {} |
| } |
| |
| fn cloned(x: &Vec<u8>) -> Vec<u8> { |
| let e = x.clone(); |
| let f = e.clone(); // OK |
| let g = x; |
| let h = g.clone(); // Alas, we cannot reliably detect this without following data. |
| let i = (e).clone(); |
| x.clone() |
| } |
| |
| fn str_cloned(x: &String) -> String { |
| let a = x.clone(); |
| let b = x.clone(); |
| let c = b.clone(); |
| let d = a.clone().clone().clone(); |
| x.clone() |
| } |
| |
| fn false_positive_capacity(x: &Vec<u8>, y: &String) { |
| let a = x.capacity(); |
| let b = y.clone(); |
| let c = y.as_str(); |
| } |
| |
| fn false_positive_capacity_too(x: &String) -> String { |
| if x.capacity() > 1024 { |
| panic!("Too large!"); |
| } |
| x.clone() |
| } |
| |
| #[allow(dead_code)] |
| fn test_cow_with_ref(c: &Cow<[i32]>) {} |
| |
| #[allow(dead_code)] |
| fn test_cow(c: Cow<[i32]>) { |
| let _c = c; |
| } |
| |
| trait Foo2 { |
| fn do_string(&self); |
| } |
| |
| // no error for &self references where self is of type String (#2293) |
| impl Foo2 for String { |
| fn do_string(&self) {} |
| } |