fix(lsp): completions for using decl identifiers (#23748)

Closes #23688

cli/lsp/tsc.rs

@@ -1372,6 +1372,7 @@ pub enum OneOrMany<T> {
   Many(Vec<T>),
 }
 
+/// Aligns with ts.ScriptElementKind
 #[derive(Debug, Clone, Deserialize, Serialize, PartialEq, Eq)]
 pub enum ScriptElementKind {
   #[serde(rename = "")]
@@ -1400,6 +1401,10 @@ pub enum ScriptElementKind {
   VariableElement,
   #[serde(rename = "local var")]
   LocalVariableElement,
+  #[serde(rename = "using")]
+  VariableUsingElement,
+  #[serde(rename = "await using")]
+  VariableAwaitUsingElement,
   #[serde(rename = "function")]
   FunctionElement,
   #[serde(rename = "local function")]
@@ -1412,6 +1417,8 @@ pub enum ScriptElementKind {
   MemberSetAccessorElement,
   #[serde(rename = "property")]
   MemberVariableElement,
+  #[serde(rename = "accessor")]
+  MemberAccessorVariableElement,
   #[serde(rename = "constructor")]
   ConstructorImplementationElement,
   #[serde(rename = "call")]
@@ -1456,7 +1463,8 @@ impl Default for ScriptElementKind {
   }
 }
 
-/// This mirrors the method `convertKind` in `completions.ts` in vscode
+/// This mirrors the method `convertKind` in `completions.ts` in vscode (extensions/typescript-language-features)
+/// https://github.com/microsoft/vscode/blob/bd2df940d74b51105aefb11304e028d2fb56a9dc/extensions/typescript-language-features/src/languageFeatures/completions.ts#L440
 impl From<ScriptElementKind> for lsp::CompletionItemKind {
   fn from(kind: ScriptElementKind) -> Self {
     match kind {
@@ -1502,7 +1510,18 @@ impl From<ScriptElementKind> for lsp::CompletionItemKind {
       ScriptElementKind::ScriptElement => lsp::CompletionItemKind::FILE,
       ScriptElementKind::Directory => lsp::CompletionItemKind::FOLDER,
       ScriptElementKind::String => lsp::CompletionItemKind::CONSTANT,
-      _ => lsp::CompletionItemKind::PROPERTY,
+      ScriptElementKind::LocalClassElement
+      | ScriptElementKind::ConstructorImplementationElement
+      | ScriptElementKind::TypeParameterElement
+      | ScriptElementKind::Label
+      | ScriptElementKind::JsxAttribute
+      | ScriptElementKind::Link
+      | ScriptElementKind::LinkName
+      | ScriptElementKind::LinkText
+      | ScriptElementKind::VariableUsingElement
+      | ScriptElementKind::VariableAwaitUsingElement
+      | ScriptElementKind::MemberAccessorVariableElement
+      | ScriptElementKind::Unknown => lsp::CompletionItemKind::PROPERTY,
     }
   }
 }

tests/integration/lsp_tests.rs

@@ -7081,6 +7081,43 @@ fn lsp_npm_completions_auto_import_and_quick_fix_no_import_map() {
   client.shutdown();
 }
 
+#[test]
+fn lsp_completions_using_decl() {
+  let context = TestContextBuilder::new().use_temp_cwd().build();
+  let mut client = context.new_lsp_command().build();
+  client.initialize_default();
+  client.did_open(json!({
+    "textDocument": {
+      "uri": "file:///a/file.ts",
+      "languageId": "typescript",
+      "version": 1,
+      "text": r#"function makeResource() {
+  return {
+    [Symbol.dispose]() {
+    },
+  };
+}
+
+using resource = makeResource();
+
+res"#
+    }
+  }));
+
+  let list = client.get_completion_list(
+    "file:///a/file.ts",
+    (9, 3),
+    json!({
+      "triggerKind": 2,
+      "triggerCharacter": "."
+    }),
+  );
+  assert!(list.items.iter().any(|i| i.label == "resource"));
+  assert!(!list.is_incomplete);
+
+  client.shutdown();
+}
+
 #[test]
 fn lsp_npm_always_caches() {
   // npm specifiers should always be cached even when not specified