[wildcards] quick fixes for DEAD_CODE_LATE_WILDCARD_VARIABLE_INITIALIZER

Fixes: #56221

Change-Id: Ie599d570bf6a6f13987a4175f955eb522ae20a10
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/375784
Reviewed-by: Brian Wilkerson <[email protected]>
Commit-Queue: Phil Quitslund <[email protected]>

Author: pq

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

@@ -13,14 +13,25 @@ class RemoveInitializer extends ResolvedCorrectionProducer {
   @override
   final CorrectionApplicability applicability;
 
+  /// If true, remove the `late` keyword.
+  final bool _removeLate;
+
   /// Initialize a newly created instance that can't apply bulk and in-file
   /// fixes.
   RemoveInitializer({required super.context})
-      : applicability = CorrectionApplicability.singleLocation;
+      : applicability = CorrectionApplicability.singleLocation,
+        _removeLate = true;
 
   /// Initialize a newly created instance that can apply bulk and in-file fixes.
   RemoveInitializer.bulkFixable({required super.context})
-      : applicability = CorrectionApplicability.automatically;
+      : applicability = CorrectionApplicability.automatically,
+        _removeLate = true;
+
+  /// Initialize a newly created instance that can't apply bulk and in-file
+  /// fixes and will not remove the `late` keyword if present.
+  RemoveInitializer.notLate({required super.context})
+      : applicability = CorrectionApplicability.singleLocation,
+        _removeLate = false;
 
   @override
   FixKind get fixKind => DartFixKind.REMOVE_INITIALIZER;
@@ -53,7 +64,7 @@ class RemoveInitializer extends ResolvedCorrectionProducer {
           );
         });
         // Delete the `late` keyword if present.
-        if (variable.isLate) {
+        if (_removeLate && variable.isLate) {
           var parent = node.parent;
           if (parent != null) {
             await builder.addDartFileEdit(file, (builder) {

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

@@ -55,6 +55,17 @@ class RemoveLate extends ResolvedCorrectionProducer {
           }
         }
       }
+    } else {
+      var grandParent = node.parent?.parent;
+      if (grandParent is VariableDeclarationList) {
+        var lateKeyword = grandParent.lateKeyword;
+        if (lateKeyword != null) {
+          return _LateKeywordLocation(
+            lateKeyword: lateKeyword,
+            nextToken: lateKeyword.next!,
+          );
+        }
+      }
     }
 
     return null;

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

@@ -45,8 +45,8 @@
 #
 # Stats:
 # -  42 "needsEvaluation"
-# - 307 "needsFix"
-# - 441 "hasFix"
+# - 306 "needsFix"
+# - 442 "hasFix"
 # - 517 "noFix"
 
 AnalysisOptionsErrorCode.INCLUDED_FILE_PARSE_ERROR:
@@ -3390,9 +3390,7 @@ WarningCode.DEAD_CODE:
 WarningCode.DEAD_CODE_CATCH_FOLLOWING_CATCH:
   status: hasFix
 WarningCode.DEAD_CODE_LATE_WILDCARD_VARIABLE_INITIALIZER:
-  status: needsFix
-  notes: |-
-    Remove the initializer or remove the late keyword.  
+  status: hasFix
 WarningCode.DEAD_CODE_ON_CATCH_SUBTYPE:
   status: hasFix
 WarningCode.DEPRECATED_EXPORT_USE:

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

@@ -1607,6 +1607,10 @@ final _builtInNonLintProducers = <ErrorCode, List<ProducerGenerator>>{
     //  a place where it can be reached (when possible).
     RemoveDeadCode.new,
   ],
+  WarningCode.DEAD_CODE_LATE_WILDCARD_VARIABLE_INITIALIZER: [
+    RemoveInitializer.notLate,
+    RemoveLate.new,
+  ],
   WarningCode.DEAD_CODE_ON_CATCH_SUBTYPE: [
     // TODO(brianwilkerson): Add a fix to move the unreachable catch clause to
     //  a place where it can be reached (when possible).

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

@@ -13,9 +13,29 @@ void main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(RemoveInitializerBulkTest);
     defineReflectiveTests(RemoveInitializerTest);
+    defineReflectiveTests(RemoveDeadWildcardInitializerTest);
   });
 }
 
+@reflectiveTest
+class RemoveDeadWildcardInitializerTest extends FixProcessorTest {
+  @override
+  FixKind get kind => DartFixKind.REMOVE_INITIALIZER;
+
+  Future<void> test_deadLateWildcardVariableInitializer() async {
+    await resolveTestCode('''
+f() {
+  late var _ = 0;
+}
+''');
+    await assertHasFix('''
+f() {
+  late var _;
+}
+''');
+  }
+}
+
 @reflectiveTest
 class RemoveInitializerBulkTest extends BulkFixProcessorTest {
   @override

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

@@ -38,6 +38,19 @@ class RemoveLateTest extends FixProcessorTest {
   @override
   FixKind get kind => DartFixKind.REMOVE_LATE;
 
+  Future<void> test_deadLateWildcardVariableInitializer() async {
+    await resolveTestCode('''
+f() {
+  late var _ = 0;
+}
+''');
+    await assertHasFix('''
+f() {
+  var _ = 0;
+}
+''');
+  }
+
   Future<void> test_it() async {
     await resolveTestCode('''
 void f(Object? x) {