Use RPITIT for `Successors` and `Predecessors` traits

Now with RPITIT instead of GAT!

1 files changed, 1 insertions, 3 deletions

diff --git a/compiler/rustc_data_structures/src/graph/scc/mod.rs b/compiler/rustc_data_structures/src/graph/scc/mod.rs
index 1cd0edfe57f..5021e5e8fc0 100644
--- a/compiler/rustc_data_structures/src/graph/scc/mod.rs
+++ b/compiler/rustc_data_structures/src/graph/scc/mod.rs
@@ -104,9 +104,7 @@ impl<N: Idx, S: Idx + Ord> NumEdges for Sccs<N, S> {
 }
 
 impl<N: Idx, S: Idx + Ord> Successors for Sccs<N, S> {
-    type Successors<'g> = std::iter::Cloned<std::slice::Iter<'g, S>>;
-
-    fn successors(&self, node: S) -> Self::Successors<'_> {
+    fn successors(&self, node: S) -> impl Iterator<Item = Self::Node> {
         self.successors(node).iter().cloned()
     }
 }