Don't classify NameRef paths inside attribute TokenTrees

crates/ide_assists/src/handlers/split_import.rs

@@ -1,5 +1,3 @@
-use std::iter::successors;
-
 use syntax::{ast, AstNode, T};
 
 use crate::{AssistContext, AssistId, AssistKind, Assists};
@@ -18,9 +16,8 @@
 pub(crate) fn split_import(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
     let colon_colon = ctx.find_token_syntax_at_offset(T![::])?;
     let path = ast::Path::cast(colon_colon.parent()?)?.qualifier()?;
-    let top_path = successors(Some(path.clone()), |it| it.parent_path()).last()?;
 
-    let use_tree = top_path.syntax().ancestors().find_map(ast::UseTree::cast)?;
+    let use_tree = path.top_path().syntax().ancestors().find_map(ast::UseTree::cast)?;
 
     let new_tree = use_tree.split_prefix(&path);
     if new_tree == use_tree {

crates/ide_db/src/defs.rs

@@ -383,14 +383,17 @@ pub fn classify(
                     }
                 }
             }
-
-            if let Some(resolved) = sema.resolve_path(&path) {
-                return if path.syntax().ancestors().find_map(ast::Attr::cast).is_some() {
+            let top_path = path.top_path();
+            let is_attribute_path = top_path
+                .syntax()
+                .ancestors()
+                .find_map(ast::Attr::cast)
+                .map(|attr| attr.path().as_ref() == Some(&top_path));
+            return match is_attribute_path {
+                Some(true) => sema.resolve_path(&path).and_then(|resolved| {
                     match resolved {
                         // Don't wanna collide with builtin attributes here like `test` hence guard
-                        PathResolution::Def(module @ ModuleDef::Module(_))
-                            if path.parent_path().is_some() =>
-                        {
+                        PathResolution::Def(module @ ModuleDef::Module(_)) if path == top_path => {
                             Some(NameRefClass::Definition(Definition::ModuleDef(module)))
                         }
                         PathResolution::Macro(mac) if mac.kind() == hir::MacroKind::Attr => {
@@ -398,10 +401,10 @@ pub fn classify(
                         }
                         _ => None,
                     }
-                } else {
-                    Some(NameRefClass::Definition(resolved.into()))
-                };
-            }
+                }),
+                Some(false) => None,
+                None => sema.resolve_path(&path).map(Into::into).map(NameRefClass::Definition),
+            };
         }
 
         let extern_crate = ast::ExternCrate::cast(parent)?;

crates/syntax/src/ast/node_ext.rs

@@ -336,6 +336,14 @@ pub fn segments(&self) -> impl Iterator<Item = ast::PathSegment> + Clone {
     pub fn qualifiers(&self) -> impl Iterator<Item = ast::Path> + Clone {
         successors(self.qualifier(), |p| p.qualifier())
     }
+
+    pub fn top_path(&self) -> ast::Path {
+        let mut this = self.clone();
+        while let Some(path) = this.parent_path() {
+            this = path;
+        }
+        this
+    }
 }
 
 impl ast::Use {