Add comments regarding workspace structure change querying

crates/rust-analyzer/src/global_state.rs

@@ -460,6 +460,11 @@ impl GlobalState {
             }
         }
 
+        // FIXME: `workspace_structure_change` is computed from `should_refresh_for_change` which is
+        // path syntax based. That is not sufficient for all cases so we should lift that check out
+        // into a `QueuedTask`, see `handle_did_save_text_document`.
+        // Or maybe instead of replacing that check, kick off a semantic one if the syntactic one
+        // didn't find anything (to make up for the lack of precision).
         {
             if !matches!(&workspace_structure_change, Some((.., true))) {
                 _ = self

crates/rust-analyzer/src/handlers/notification.rs

@@ -158,6 +158,8 @@ pub(crate) fn handle_did_save_text_document(
                 .map(|cfg| cfg.files_to_watch.iter().map(String::as_str).collect::<Vec<&str>>())
                 .unwrap_or_default();
 
+            // FIXME: We should move this check into a QueuedTask and do semantic resolution of
+            // the files. There is only so much we can tell syntactically from the path.
             if reload::should_refresh_for_change(path, ChangeKind::Modify, additional_files) {
                 state.fetch_workspaces_queue.request_op(
                     format!("workspace vfs file change saved {path}"),

crates/rust-analyzer/src/main_loop.rs

@@ -105,6 +105,7 @@ pub(crate) enum Task {
     FetchWorkspace(ProjectWorkspaceProgress),
     FetchBuildData(BuildDataProgress),
     LoadProcMacros(ProcMacroProgress),
+    // FIXME: Remove this in favor of a more general QueuedTask, see `handle_did_save_text_document`
     BuildDepsHaveChanged,
 }