rust-clippy/tests/ui/use_self_trait.rs
2020-01-12 06:08:58 +09:00

114 lines
1.9 KiB
Rust

// run-rustfix
#![warn(clippy::use_self)]
#![allow(dead_code)]
#![allow(clippy::should_implement_trait, clippy::boxed_local)]
use std::ops::Mul;
trait SelfTrait {
fn refs(p1: &Self) -> &Self;
fn ref_refs<'a>(p1: &'a &'a Self) -> &'a &'a Self;
fn mut_refs(p1: &mut Self) -> &mut Self;
fn nested(p1: Box<Self>, p2: (&u8, &Self));
fn vals(r: Self) -> Self;
}
#[derive(Default)]
struct Bad;
impl SelfTrait for Bad {
fn refs(p1: &Bad) -> &Bad {
p1
}
fn ref_refs<'a>(p1: &'a &'a Bad) -> &'a &'a Bad {
p1
}
fn mut_refs(p1: &mut Bad) -> &mut Bad {
p1
}
fn nested(_p1: Box<Bad>, _p2: (&u8, &Bad)) {}
fn vals(_: Bad) -> Bad {
Bad::default()
}
}
impl Mul for Bad {
type Output = Bad;
fn mul(self, rhs: Bad) -> Bad {
rhs
}
}
impl Clone for Bad {
fn clone(&self) -> Self {
Bad
}
}
#[derive(Default)]
struct Good;
impl SelfTrait for Good {
fn refs(p1: &Self) -> &Self {
p1
}
fn ref_refs<'a>(p1: &'a &'a Self) -> &'a &'a Self {
p1
}
fn mut_refs(p1: &mut Self) -> &mut Self {
p1
}
fn nested(_p1: Box<Self>, _p2: (&u8, &Self)) {}
fn vals(_: Self) -> Self {
Self::default()
}
}
impl Mul for Good {
type Output = Self;
fn mul(self, rhs: Self) -> Self {
rhs
}
}
trait NameTrait {
fn refs(p1: &u8) -> &u8;
fn ref_refs<'a>(p1: &'a &'a u8) -> &'a &'a u8;
fn mut_refs(p1: &mut u8) -> &mut u8;
fn nested(p1: Box<u8>, p2: (&u8, &u8));
fn vals(p1: u8) -> u8;
}
// Using `Self` instead of the type name is OK
impl NameTrait for u8 {
fn refs(p1: &Self) -> &Self {
p1
}
fn ref_refs<'a>(p1: &'a &'a Self) -> &'a &'a Self {
p1
}
fn mut_refs(p1: &mut Self) -> &mut Self {
p1
}
fn nested(_p1: Box<Self>, _p2: (&Self, &Self)) {}
fn vals(_: Self) -> Self {
Self::default()
}
}
fn main() {}