Make type walking infrastructure a bit nicer

If/when we switch to using Chalk's Ty, we'll need to replace this by its `Fold`
trait, but I didn't want to import the whole thing just yet.

1 files changed, 1 insertions, 1 deletions

diff --git a/crates/ra_hir/src/ty/autoderef.rs b/crates/ra_hir/src/ty/autoderef.rs
index 2535d4ae7..08f52a53b 100644
--- a/crates/ra_hir/src/ty/autoderef.rs
+++ b/crates/ra_hir/src/ty/autoderef.rs
@@ -7,7 +7,7 @@ use std::iter::successors;
 
 use log::{info, warn};
 
-use super::{traits::Solution, Canonical, Ty};
+use super::{traits::Solution, Canonical, Ty, TypeWalk};
 use crate::{HasGenericParams, HirDatabase, Name, Resolver};
 
 const AUTODEREF_RECURSION_LIMIT: usize = 10;