Merge pull request #22779 from Shourya742/2026-07-13-remove-tree-mutator-from-ide-db

Remove tree mutator from source_change in ide-db

Author: ChayimFriedman2

crates/ide-db/src/source_change.rs

@@ -232,17 +232,10 @@ pub struct SourceChangeBuilder {
     /// Keeps track of which annotations correspond to which snippets
     pub snippet_annotations: Vec<(AnnotationSnippet, SyntaxAnnotation)>,
 
-    /// Maps the original, immutable `SyntaxNode` to a `clone_for_update` twin.
-    mutated_tree: Option<TreeMutator>,
     /// Keeps track of where to place snippets
     pub snippet_builder: Option<SnippetBuilder>,
 }
 
-struct TreeMutator {
-    immutable: SyntaxNode,
-    mutable_clone: SyntaxNode,
-}
-
 #[derive(Default)]
 pub struct SnippetBuilder {
     /// Where to place snippets at
@@ -258,7 +251,6 @@ impl SourceChangeBuilder {
             command: None,
             file_editors: FxHashMap::default(),
             snippet_annotations: vec![],
-            mutated_tree: None,
             snippet_builder: None,
         }
     }
@@ -343,10 +335,6 @@ impl SourceChangeBuilder {
             )
         });
 
-        if let Some(tm) = self.mutated_tree.take() {
-            diff(&tm.immutable, &tm.mutable_clone).into_text_edit(&mut self.edit);
-        }
-
         let edit = mem::take(&mut self.edit).finish();
         if !edit.is_empty() || snippet_edit.is_some() {
             self.source_change.insert_source_and_snippet_edit(self.file_id, edit, snippet_edit);