diff --git a/src/api.rs b/src/api.rs
index 69e2f07..3a83daf 100644
--- a/src/api.rs
+++ b/src/api.rs
@@ -133,7 +133,7 @@ impl<L: Language> SyntaxNode<L> {
         self.raw.parent().map(Self::from)
     }
 
-    pub fn ancestors(&self) -> impl Iterator<Item = SyntaxNode<L>> {
+    pub fn ancestors(&self) -> impl Iterator<Item = SyntaxNode<L>> + use<L> {
         self.raw.ancestors().map(SyntaxNode::from)
     }
 
@@ -219,7 +219,7 @@ impl<L: Language> SyntaxNode<L> {
         self.raw.last_token().map(SyntaxToken::from)
     }
 
-    pub fn siblings(&self, direction: Direction) -> impl Iterator<Item = SyntaxNode<L>> {
+    pub fn siblings(&self, direction: Direction) -> impl Iterator<Item = SyntaxNode<L>> + use<L> {
         self.raw.siblings(direction).map(SyntaxNode::from)
     }
 
@@ -230,11 +230,11 @@ impl<L: Language> SyntaxNode<L> {
         self.raw.siblings_with_tokens(direction).map(SyntaxElement::from)
     }
 
-    pub fn descendants(&self) -> impl Iterator<Item = SyntaxNode<L>> {
+    pub fn descendants(&self) -> impl Iterator<Item = SyntaxNode<L>> + use<L> {
         self.raw.descendants().map(SyntaxNode::from)
     }
 
-    pub fn descendants_with_tokens(&self) -> impl Iterator<Item = SyntaxElement<L>> {
+    pub fn descendants_with_tokens(&self) -> impl Iterator<Item = SyntaxElement<L>> + use<L> {
         self.raw.descendants_with_tokens().map(NodeOrToken::from)
     }
 
@@ -337,12 +337,12 @@ impl<L: Language> SyntaxToken<L> {
 
     /// Iterator over all the ancestors of this token excluding itself.
     #[deprecated = "use `SyntaxToken::parent_ancestors` instead"]
-    pub fn ancestors(&self) -> impl Iterator<Item = SyntaxNode<L>> {
+    pub fn ancestors(&self) -> impl Iterator<Item = SyntaxNode<L>> + use<L> {
         self.parent_ancestors()
     }
 
     /// Iterator over all the ancestors of this token excluding itself.
-    pub fn parent_ancestors(&self) -> impl Iterator<Item = SyntaxNode<L>> {
+    pub fn parent_ancestors(&self) -> impl Iterator<Item = SyntaxNode<L>> + use<L> {
         self.raw.ancestors().map(SyntaxNode::from)
     }
 
@@ -356,7 +356,7 @@ impl<L: Language> SyntaxToken<L> {
     pub fn siblings_with_tokens(
         &self,
         direction: Direction,
-    ) -> impl Iterator<Item = SyntaxElement<L>> {
+    ) -> impl Iterator<Item = SyntaxElement<L>> + use<L> {
         self.raw.siblings_with_tokens(direction).map(SyntaxElement::from)
     }
 
@@ -403,7 +403,7 @@ impl<L: Language> SyntaxElement<L> {
         }
     }
 
-    pub fn ancestors(&self) -> impl Iterator<Item = SyntaxNode<L>> {
+    pub fn ancestors(&self) -> impl Iterator<Item = SyntaxNode<L>> + use<L> {
         let first = match self {
             NodeOrToken::Node(it) => Some(it.clone()),
             NodeOrToken::Token(it) => it.parent(),
diff --git a/src/cursor.rs b/src/cursor.rs
index 7d63948..0ea88ac 100644
--- a/src/cursor.rs
+++ b/src/cursor.rs
@@ -668,7 +668,7 @@ impl SyntaxNode {
     }
 
     #[inline]
-    pub fn ancestors(&self) -> impl Iterator<Item = SyntaxNode> {
+    pub fn ancestors(&self) -> impl Iterator<Item = SyntaxNode> + use<> {
         iter::successors(Some(self.clone()), SyntaxNode::parent)
     }
 
@@ -831,7 +831,7 @@ impl SyntaxNode {
     }
 
     #[inline]
-    pub fn siblings(&self, direction: Direction) -> impl Iterator<Item = SyntaxNode> {
+    pub fn siblings(&self, direction: Direction) -> impl Iterator<Item = SyntaxNode> + use<> {
         iter::successors(Some(self.clone()), move |node| match direction {
             Direction::Next => node.next_sibling(),
             Direction::Prev => node.prev_sibling(),
@@ -842,7 +842,7 @@ impl SyntaxNode {
     pub fn siblings_with_tokens(
         &self,
         direction: Direction,
-    ) -> impl Iterator<Item = SyntaxElement> {
+    ) -> impl Iterator<Item = SyntaxElement> + use<> {
         let me: SyntaxElement = self.clone().into();
         iter::successors(Some(me), move |el| match direction {
             Direction::Next => el.next_sibling_or_token(),
@@ -851,7 +851,7 @@ impl SyntaxNode {
     }
 
     #[inline]
-    pub fn descendants(&self) -> impl Iterator<Item = SyntaxNode> {
+    pub fn descendants(&self) -> impl Iterator<Item = SyntaxNode> + use<> {
         self.preorder().filter_map(|event| match event {
             WalkEvent::Enter(node) => Some(node),
             WalkEvent::Leave(_) => None,
@@ -859,7 +859,7 @@ impl SyntaxNode {
     }
 
     #[inline]
-    pub fn descendants_with_tokens(&self) -> impl Iterator<Item = SyntaxElement> {
+    pub fn descendants_with_tokens(&self) -> impl Iterator<Item = SyntaxElement> + use<> {
         self.preorder_with_tokens().filter_map(|event| match event {
             WalkEvent::Enter(it) => Some(it),
             WalkEvent::Leave(_) => None,
@@ -1054,7 +1054,7 @@ impl SyntaxToken {
     }
 
     #[inline]
-    pub fn ancestors(&self) -> impl Iterator<Item = SyntaxNode> {
+    pub fn ancestors(&self) -> impl Iterator<Item = SyntaxNode> + use<> {
         std::iter::successors(self.parent(), SyntaxNode::parent)
     }
 
@@ -1077,7 +1077,7 @@ impl SyntaxToken {
     pub fn siblings_with_tokens(
         &self,
         direction: Direction,
-    ) -> impl Iterator<Item = SyntaxElement> {
+    ) -> impl Iterator<Item = SyntaxElement> + use<> {
         let me: SyntaxElement = self.clone().into();
         iter::successors(Some(me), move |el| match direction {
             Direction::Next => el.next_sibling_or_token(),
@@ -1156,7 +1156,7 @@ impl SyntaxElement {
     }
 
     #[inline]
-    pub fn ancestors(&self) -> impl Iterator<Item = SyntaxNode> {
+    pub fn ancestors(&self) -> impl Iterator<Item = SyntaxNode> + use<> {
         let first = match self {
             NodeOrToken::Node(it) => Some(it.clone()),
             NodeOrToken::Token(it) => it.parent(),
diff --git a/src/syntax_text.rs b/src/syntax_text.rs
index 981df56..7e91ba2 100644
--- a/src/syntax_text.rs
+++ b/src/syntax_text.rs
@@ -105,7 +105,7 @@ impl SyntaxText {
         }
     }
 
-    fn tokens_with_ranges(&self) -> impl Iterator<Item = (SyntaxToken, TextRange)> {
+    fn tokens_with_ranges(&self) -> impl Iterator<Item = (SyntaxToken, TextRange)> + use<> {
         let text_range = self.range;
         self.node.descendants_with_tokens().filter_map(|element| element.into_token()).filter_map(
             move |token| {