From e106857e80d1ea304b00b5ff8a3294ca9bacd959 Mon Sep 17 00:00:00 2001
From: Lukas Wirth <lukastw97@gmail.com>
Date: Wed, 7 Oct 2020 12:13:32 +0200
Subject: [PATCH] Shorten iterator hints for std::iter iterators behind
 references

---
 crates/assists/src/utils.rs   | 2 +-
 crates/ide/src/inlay_hints.rs | 6 ++++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/crates/assists/src/utils.rs b/crates/assists/src/utils.rs
index 92b3c3b009b..c074b8d02f9 100644
--- a/crates/assists/src/utils.rs
+++ b/crates/assists/src/utils.rs
@@ -308,7 +308,7 @@ fn next(&mut self) -> Option<I::Item> {
                 }
             }
         }
-        pub(crate) mod collect {            
+        pub(crate) mod collect {
             pub trait IntoIterator {
                 type Item;
             }
diff --git a/crates/ide/src/inlay_hints.rs b/crates/ide/src/inlay_hints.rs
index 279d025417c..7540f56a4b1 100644
--- a/crates/ide/src/inlay_hints.rs
+++ b/crates/ide/src/inlay_hints.rs
@@ -211,7 +211,9 @@ fn hint_iterator(
     ty: &Type,
 ) -> Option<SmolStr> {
     let db = sema.db;
-    let strukt = ty.as_adt()?;
+    let strukt = std::iter::successors(Some(ty.clone()), |ty| ty.remove_ref())
+        .last()
+        .and_then(|strukt| strukt.as_adt())?;
     let krate = strukt.krate(db)?;
     if krate.declaration_name(db).as_deref() != Some("core") {
         return None;
@@ -1169,7 +1171,7 @@ fn main() {
                     InlayHint {
                         range: 175..225,
                         kind: ChainingHint,
-                        label: "&mut Take<&mut MyIter>",
+                        label: "impl Iterator<Item = ()>",
                     },
                     InlayHint {
                         range: 175..207,