Add a fix for unnecessaryPrimaryConstructorBody

Closes https://github.com/dart-lang/sdk/issues/63556

Change-Id: I04ff967649b1b834600578a2d38ca480b9d19ec6
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/511020
Commit-Queue: Brian Wilkerson <brianwilkerson@google.com>
Reviewed-by: Keerti Parthasarathy <keertip@google.com>

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

@@ -0,0 +1,35 @@
+// Copyright (c) 2026, the Dart project authors. Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import 'package:analysis_server/src/services/correction/fix.dart';
+import 'package:analysis_server_plugin/edit/dart/correction_producer.dart';
+import 'package:analyzer/dart/ast/ast.dart';
+import 'package:analyzer_plugin/utilities/change_builder/change_builder_core.dart';
+import 'package:analyzer_plugin/utilities/fixes/fixes.dart';
+
+class RemovePrimaryConstructorBody extends ResolvedCorrectionProducer {
+  new({required super.context});
+
+  @override
+  CorrectionApplicability get applicability =>
+      CorrectionApplicability.automatically;
+
+  @override
+  FixKind get fixKind => DartFixKind.removePrimaryConstructorBody;
+
+  @override
+  FixKind get multiFixKind => DartFixKind.removePrimaryConstructorBodyMulti;
+
+  @override
+  Future<void> compute(ChangeBuilder builder) async {
+    var body = node.thisOrAncestorOfType<PrimaryConstructorBody>();
+    if (body == null) {
+      return;
+    }
+
+    await builder.addDartFileEdit(file, (builder) {
+      builder.addDeletion(utils.getLinesRange(body.sourceRange));
+    });
+  }
+}

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

@@ -2584,9 +2584,7 @@ unnecessary_overrides:
 unnecessary_parenthesis:
   status: hasFix
 unnecessary_primary_constructor_body:
-  status: needsFix
-  notes: |-
-    The fix is to remove the body.
+  status: hasFix
 unnecessary_raw_strings:
   status: hasFix
 unnecessary_statements:

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

@@ -1632,6 +1632,16 @@ abstract final class DartFixKind {
     DartFixKindPriority.standard,
     'Remove parentheses in getter invocation',
   );
+  static const removePrimaryConstructorBody = FixKind(
+    'dart.fix.remove.primaryConstructorBody',
+    DartFixKindPriority.standard,
+    'Remove primary constructor body',
+  );
+  static const removePrimaryConstructorBodyMulti = FixKind(
+    'dart.fix.remove.primaryConstructorBody.multi',
+    DartFixKindPriority.inFile,
+    'Remove primary constructor bodies file',
+  );
   static const removePrint = FixKind(
     'dart.fix.remove.removePrint',
     DartFixKindPriority.standard,

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

@@ -177,6 +177,7 @@ import 'package:analysis_server/src/services/correction/dart/remove_on_clause.da
 import 'package:analysis_server/src/services/correction/dart/remove_operator.dart';
 import 'package:analysis_server/src/services/correction/dart/remove_parameters_in_getter_declaration.dart';
 import 'package:analysis_server/src/services/correction/dart/remove_parentheses_in_getter_invocation.dart';
+import 'package:analysis_server/src/services/correction/dart/remove_primary_constructor_body.dart';
 import 'package:analysis_server/src/services/correction/dart/remove_print.dart';
 import 'package:analysis_server/src/services/correction/dart/remove_question_mark.dart';
 import 'package:analysis_server/src/services/correction/dart/remove_required.dart';
@@ -472,6 +473,7 @@ final _builtInLintGenerators = <DiagnosticCode, List<ProducerGenerator>>{
   ],
   diag.unnecessaryOverrides: [RemoveMethodDeclaration.new],
   diag.unnecessaryParenthesis: [RemoveUnnecessaryParentheses.new],
+  diag.unnecessaryPrimaryConstructorBody: [RemovePrimaryConstructorBody.new],
   diag.unnecessaryRawStrings: [RemoveUnnecessaryRawString.new],
   diag.unnecessaryStringEscapes: [RemoveUnnecessaryStringEscape.new],
   diag.unnecessaryStringInterpolations: [

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

@@ -0,0 +1,72 @@
+// Copyright (c) 2026, the Dart project authors. Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import 'package:analysis_server/src/services/correction/fix.dart';
+import 'package:analyzer_plugin/utilities/fixes/fixes.dart';
+import 'package:test_reflective_loader/test_reflective_loader.dart';
+
+import 'fix_processor.dart';
+
+void main() {
+  defineReflectiveSuite(() {
+    defineReflectiveTests(RemovePrimaryConstructorBodyBulkTest);
+    defineReflectiveTests(RemovePrimaryConstructorBodyTest);
+  });
+}
+
+@reflectiveTest
+class RemovePrimaryConstructorBodyBulkTest extends BulkFixProcessorTest {
+  @override
+  String get lintCode => LintNames.unnecessary_primary_constructor_body;
+
+  Future<void> test_multiple() async {
+    await resolveTestCode(r'''
+class A(final int i) {
+  this;
+}
+class B(final int i) {
+  this {}
+}
+''');
+    await assertHasFix(r'''
+class A(final int i) {
+}
+class B(final int i) {
+}
+''');
+  }
+}
+
+@reflectiveTest
+class RemovePrimaryConstructorBodyTest extends FixProcessorLintTest {
+  @override
+  FixKind get kind => DartFixKind.removePrimaryConstructorBody;
+
+  @override
+  String get lintCode => LintNames.unnecessary_primary_constructor_body;
+
+  Future<void> test_block() async {
+    await resolveTestCode(r'''
+class C(final int i) {
+  this {}
+}
+''');
+    await assertHasFix(r'''
+class C(final int i) {
+}
+''');
+  }
+
+  Future<void> test_semicolon() async {
+    await resolveTestCode(r'''
+class C(final int i) {
+  this;
+}
+''');
+    await assertHasFix(r'''
+class C(final int i) {
+}
+''');
+  }
+}

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

@@ -232,6 +232,8 @@ import 'remove_parameters_in_getter_declaration_test.dart'
     as remove_parameters_in_getter_declaration;
 import 'remove_parentheses_in_getter_invocation_test.dart'
     as remove_parentheses_in_getter_invocation;
+import 'remove_primary_constructor_body_test.dart'
+    as remove_primary_constructor_body;
 import 'remove_print_test.dart' as remove_print;
 import 'remove_question_mark_test.dart' as remove_question_mark;
 import 'remove_required_test.dart' as remove_required;
@@ -532,6 +534,7 @@ void main() {
     remove_operator.main();
     remove_parameters_in_getter_declaration.main();
     remove_parentheses_in_getter_invocation.main();
+    remove_primary_constructor_body.main();
     remove_print.main();
     remove_question_mark.main();
     remove_required.main();