fix: Map new replacement nodes to their mutable equivalents in SyntaxEditor

crates/ide-assists/src/handlers/flip_binexpr.rs

@@ -52,9 +52,8 @@ pub(crate) fn flip_binexpr(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option
             if let FlipAction::FlipAndReplaceOp(binary_op) = action {
                 editor.replace(op_token, make.token(binary_op))
             };
-            // FIXME: remove `clone_for_update` when `SyntaxEditor` handles it for us
-            editor.replace(lhs.syntax(), rhs.syntax().clone_for_update());
-            editor.replace(rhs.syntax(), lhs.syntax().clone_for_update());
+            editor.replace(lhs.syntax(), rhs.syntax());
+            editor.replace(rhs.syntax(), lhs.syntax());
             editor.add_mappings(make.finish_with_mappings());
             builder.add_file_edits(ctx.file_id(), editor);
         },

crates/ide-assists/src/handlers/flip_comma.rs

@@ -39,13 +39,12 @@ pub(crate) fn flip_comma(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option<(
         return None;
     }
 
-    // FIXME: remove `clone_for_update` when `SyntaxEditor` handles it for us
     let prev = match prev {
-        SyntaxElement::Node(node) => node.clone_for_update().syntax_element(),
+        SyntaxElement::Node(node) => node.syntax_element(),
         _ => prev,
     };
     let next = match next {
-        SyntaxElement::Node(node) => node.clone_for_update().syntax_element(),
+        SyntaxElement::Node(node) => node.syntax_element(),
         _ => next,
     };
 

crates/ide-assists/src/handlers/flip_trait_bound.rs

@@ -37,8 +37,8 @@ pub(crate) fn flip_trait_bound(acc: &mut Assists, ctx: &AssistContext<'_>) -> Op
         target,
         |builder| {
             let mut editor = builder.make_editor(parent.syntax());
-            editor.replace(before.clone(), after.clone_for_update());
-            editor.replace(after.clone(), before.clone_for_update());
+            editor.replace(before.clone(), after.clone());
+            editor.replace(after, before);
             builder.add_file_edits(ctx.file_id(), editor);
         },
     )

crates/ide-assists/src/handlers/reorder_fields.rs

@@ -92,10 +92,9 @@ fn replace<T: AstNode + PartialEq>(
     fields: impl Iterator<Item = T>,
     sorted_fields: impl IntoIterator<Item = T>,
 ) {
-    fields.zip(sorted_fields).for_each(|(field, sorted_field)| {
-        // FIXME: remove `clone_for_update` when `SyntaxEditor` handles it for us
-        editor.replace(field.syntax(), sorted_field.syntax().clone_for_update())
-    });
+    fields
+        .zip(sorted_fields)
+        .for_each(|(field, sorted_field)| editor.replace(field.syntax(), sorted_field.syntax()));
 }
 
 fn compute_fields_ranks(

crates/ide-assists/src/handlers/reorder_impl_items.rs

@@ -101,10 +101,10 @@ pub(crate) fn reorder_impl_items(acc: &mut Assists, ctx: &AssistContext<'_>) ->
         |builder| {
             let mut editor = builder.make_editor(&parent_node);
 
-            assoc_items.into_iter().zip(sorted).for_each(|(old, new)| {
-                // FIXME: remove `clone_for_update` when `SyntaxEditor` handles it for us
-                editor.replace(old.syntax(), new.clone_for_update().syntax())
-            });
+            assoc_items
+                .into_iter()
+                .zip(sorted)
+                .for_each(|(old, new)| editor.replace(old.syntax(), new.syntax()));
 
             builder.add_file_edits(ctx.file_id(), editor);
         },

crates/ide-assists/src/handlers/sort_items.rs

@@ -133,10 +133,9 @@ impl AddRewrite for Assists {
             |builder| {
                 let mut editor = builder.make_editor(target);
 
-                old.into_iter().zip(new).for_each(|(old, new)| {
-                    // FIXME: remove `clone_for_update` when `SyntaxEditor` handles it for us
-                    editor.replace(old.syntax(), new.clone_for_update().syntax())
-                });
+                old.into_iter()
+                    .zip(new)
+                    .for_each(|(old, new)| editor.replace(old.syntax(), new.syntax()));
 
                 builder.add_file_edits(builder.file_id, editor)
             },

crates/syntax/src/syntax_editor/edit_algo.rs

@@ -155,6 +155,12 @@ pub(super) fn apply_edits(editor: SyntaxEditor) -> SyntaxEdit {
                     }
                 };
             }
+            Change::Replace(SyntaxElement::Node(target), Some(SyntaxElement::Node(new_target))) => {
+                *target = tree_mutator.make_syntax_mut(target);
+                if new_target.ancestors().any(|node| node == tree_mutator.immutable) {
+                    *new_target = new_target.clone_for_update();
+                }
+            }
             Change::Replace(target, _) | Change::ReplaceWithMany(target, _) => {
                 *target = tree_mutator.make_element_mut(target);
             }