Function rustc_query_impl::make_query::impl_item_implementor_ids

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

Maps from associated items on a trait to the corresponding associated item on the impl specified by impl_id.

For example, with the following code

struct Type {}
                        // DefId
trait Trait {           // trait_id
    fn f();             // trait_f
    fn g() {}           // trait_g
}

impl Trait for Type {   // impl_id
    fn f() {}           // impl_f
    fn g() {}           // impl_g
}

The map returned for tcx.impl_item_implementor_ids(impl_id) would be { trait_f: impl_f, trait_g: impl_g }