Function rustc_query_impl::make_query::has_structural_eq_impls

pub fn has_structural_eq_impls<'tcx>(
    tcx: QueryCtxt<'tcx>, 
    key: has_structural_eq_impls<'tcx>
) -> QueryStackFrame

Query backing TyS::is_structural_eq_shallow.

This is only correct for ADTs. Call is_structural_eq_shallow to handle all types correctly.