False positive "mismatched types" for String::from("") == ""

[Aloso]

This only affects the default macro engine.

There are PartialEq implementations for comparing a String with a string slice. It's defined here:

macro_rules! impl_eq {
    ($lhs:ty, $rhs: ty) => {
        #[stable(feature = "rust1", since = "1.0.0")]
        impl<'a, 'b> PartialEq<$rhs> for $lhs {
            #[inline]
            fn eq(&self, other: &$rhs) -> bool { PartialEq::eq(&self[..], &other[..]) }
            #[inline]
            fn ne(&self, other: &$rhs) -> bool { PartialEq::ne(&self[..], &other[..]) }
        }

        #[stable(feature = "rust1", since = "1.0.0")]
        impl<'a, 'b> PartialEq<$lhs> for $rhs {
            #[inline]
            fn eq(&self, other: &$lhs) -> bool { PartialEq::eq(&self[..], &other[..]) }
            #[inline]
            fn ne(&self, other: &$lhs) -> bool { PartialEq::ne(&self[..], &other[..]) }
        }

    }
}

impl_eq! { String, str }
impl_eq! { String, &'a str }
impl_eq! { Cow<'a, str>, str }
impl_eq! { Cow<'a, str>, &'b str }
impl_eq! { Cow<'a, str>, String }

But when expanding with the default macro engine, IntelliJ Rust doesn't find these implementations.

[Aloso]

I believe this is the wrong repo.