quick fix for MISSING_TYPEDEF_PARAMETERS

See: #55917

Change-Id: I9b81940c1c515bf923ceecb83d5aaad1d416dab1
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/370482
Commit-Queue: Phil Quitslund <[email protected]>
Reviewed-by: Brian Wilkerson <[email protected]>

Author: pq

pkg/analysis_server/lib/src/services/correction/dart/add_empty_argument_list.dart

@@ -24,10 +24,17 @@ class AddEmptyArgumentList extends ResolvedCorrectionProducer {
   @override
   Future<void> compute(ChangeBuilder builder) async {
     var node = this.node;
-    if (node is! AnnotationImpl) return;
+    int? offset;
+    if (node is AnnotationImpl) {
+      offset = node.end;
+    } else if (node is FunctionTypeAlias) {
+      // endToken is the trailing `;`.
+      offset = node.endToken.previous?.end;
+    }
+    if (offset == null) return;
 
     await builder.addDartFileEdit(file, (builder) {
-      builder.addSimpleInsertion(node.end, '()');
+      builder.addSimpleInsertion(offset!, '()');
     });
   }
 }

pkg/analysis_server/lib/src/services/correction/error_fix_status.yaml

@@ -45,7 +45,7 @@
 #
 # Stats:
 # -  42 "needsEvaluation"
-# - 334 "needsFix"
+# - 331 "needsFix"
 # - 417 "hasFix"
 # - 516 "noFix"
 
@@ -3060,9 +3060,7 @@ ParserErrorCode.MISSING_TERMINATOR_FOR_PARAMETER_GROUP:
   notes: |-
     Add the missing terminator.
 ParserErrorCode.MISSING_TYPEDEF_PARAMETERS:
-  status: needsFix
-  notes: |-
-    Add an empty parameter list.
+  status: hasFix
 ParserErrorCode.MISSING_VARIABLE_IN_FOR_EACH:
   status: noFix
 ParserErrorCode.MIXED_PARAMETER_GROUPS:

pkg/analysis_server/lib/src/services/correction/fix_internal.dart

@@ -1452,6 +1452,9 @@ final _builtInNonLintProducers = <ErrorCode, List<ProducerGenerator>>{
   ParserErrorCode.MISSING_FUNCTION_BODY: [
     ConvertIntoBlockBody.missingBody,
   ],
+  ParserErrorCode.MISSING_TYPEDEF_PARAMETERS: [
+    AddEmptyArgumentList.new,
+  ],
   ParserErrorCode.MIXIN_DECLARES_CONSTRUCTOR: [
     RemoveConstructor.new,
   ],

pkg/analysis_server/test/src/services/correction/fix/add_empty_argument_list_test.dart

@@ -61,6 +61,15 @@ class A {
 }
 @A()
 main() {}
+''');
+  }
+
+  Future<void> test_missingTypedefParameters() async {
+    await resolveTestCode('''
+typedef F<E>;
+''');
+    await assertHasFix('''
+typedef F<E>();
 ''');
   }
 }