File: rigid-hr-projection-issue-93340.rs

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//@ revisions: old next
//@[next] compile-flags: -Znext-solver
//@ check-pass

pub trait Scalar: 'static {
    type RefType<'a>: ScalarRef<'a>;
}

pub trait ScalarRef<'a>: 'a {}

fn cmp_eq<'a, 'b, A: Scalar, B: Scalar, O: Scalar>(a: A::RefType<'a>, b: B::RefType<'b>) -> O {
    todo!()
}

fn build_expression<A: Scalar, B: Scalar, O: Scalar>(
) -> impl Fn(A::RefType<'_>, B::RefType<'_>) -> O {
    cmp_eq::<A, B, O>
}

fn main() {}