rust/tests/ui/needless_partial_ord_impl.rs

//@run-rustfix
#![allow(unused)]
#![no_main]

use std::cmp::Ordering;

// lint

#[derive(Eq, PartialEq)]
struct A(u32);

impl Ord for A {
    fn cmp(&self, other: &Self) -> Ordering {
        todo!();
    }
}

impl PartialOrd for A {
    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
        todo!();
    }
}

// do not lint

#[derive(Eq, PartialEq)]
struct B(u32);

impl Ord for B {
    fn cmp(&self, other: &Self) -> Ordering {
        todo!();
    }
}

impl PartialOrd for B {
    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
        Some(self.cmp(other))
    }
}

// lint, but we can't give a suggestion since &Self is not named

#[derive(Eq, PartialEq)]
struct C(u32);

impl Ord for C {
    fn cmp(&self, other: &Self) -> Ordering {
        todo!();
    }
}

impl PartialOrd for C {
    fn partial_cmp(&self, _: &Self) -> Option<Ordering> {
        todo!();
    }
}

// do not lint derived

#[derive(Eq, Ord, PartialEq, PartialOrd)]
struct D(u32);

// do not lint if ord is not manually implemented

#[derive(Eq, PartialEq)]
struct E(u32);

impl PartialOrd for E {
    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
        todo!();
    }
}

// do not lint since ord has more restrictive bounds

#[derive(Eq, PartialEq)]
struct Uwu<A>(A);

impl<A: std::fmt::Debug + Ord + PartialOrd> Ord for Uwu<A> {
    fn cmp(&self, other: &Self) -> Ordering {
        todo!();
    }
}

impl<A: Ord + PartialOrd> PartialOrd for Uwu<A> {
    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
        todo!();
    }
}