From 3bcc2b788886ba12585b9be8d6cc088d60ca0416 Mon Sep 17 00:00:00 2001
From: David Barsky <me@davidbarsky.com>
Date: Wed, 4 Sep 2024 08:52:57 -0400
Subject: [PATCH] assist: ensure replace_qualified_name_with_use applies to the
 first path segment

---
 .../replace_qualified_name_with_use.rs        | 34 ++++++++++++++-----
 1 file changed, 25 insertions(+), 9 deletions(-)

diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/replace_qualified_name_with_use.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/replace_qualified_name_with_use.rs
index 65330b34c4a..1101c20f1b7 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/replace_qualified_name_with_use.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/replace_qualified_name_with_use.rs
@@ -29,7 +29,7 @@ pub(crate) fn replace_qualified_name_with_use(
     acc: &mut Assists,
     ctx: &AssistContext<'_>,
 ) -> Option<()> {
-    let original_path: ast::Path = ctx.find_node_at_offset()?;
+    let mut original_path: ast::Path = ctx.find_node_at_offset()?;
     // We don't want to mess with use statements
     if original_path.syntax().ancestors().find_map(ast::UseTree::cast).is_some() {
         cov_mark::hit!(not_applicable_in_use);
@@ -37,8 +37,7 @@ pub(crate) fn replace_qualified_name_with_use(
     }
 
     if original_path.qualifier().is_none() {
-        cov_mark::hit!(dont_import_trivial_paths);
-        return None;
+        original_path = original_path.parent_path()?;
     }
 
     // only offer replacement for non assoc items
@@ -236,12 +235,6 @@ fn test_replace_add_use_no_anchor_middle_segment() {
         );
     }
 
-    #[test]
-    fn dont_import_trivial_paths() {
-        cov_mark::check!(dont_import_trivial_paths);
-        check_assist_not_applicable(replace_qualified_name_with_use, r"impl foo$0 for () {}");
-    }
-
     #[test]
     fn test_replace_not_applicable_in_use() {
         cov_mark::check!(not_applicable_in_use);
@@ -271,6 +264,29 @@ fn main() {
         );
     }
 
+    #[test]
+    fn assist_runs_on_first_segment() {
+        check_assist(
+            replace_qualified_name_with_use,
+            r"
+mod std { pub mod fmt { pub trait Debug {} } }
+fn main() {
+    $0std::fmt::Debug;
+    let x: std::fmt::Debug = std::fmt::Debug;
+}
+    ",
+            r"
+use std::fmt;
+
+mod std { pub mod fmt { pub trait Debug {} } }
+fn main() {
+    fmt::Debug;
+    let x: fmt::Debug = fmt::Debug;
+}
+    ",
+        );
+    }
+
     #[test]
     fn does_not_replace_in_submodules() {
         check_assist(