replace some ._() constructors with class modifiers

analysis_options.yaml

@@ -31,7 +31,7 @@ linter:
     - avoid_bool_literals_in_conditional_expressions
     # - avoid_catches_without_on_clauses # blocked on https://github.com/dart-lang/linter/issues/3023
     # - avoid_catching_errors # blocked on https://github.com/dart-lang/linter/issues/3023
-    - avoid_classes_with_only_static_members
+    # - avoid_classes_with_only_static_members # we do this commonly
     - avoid_double_and_int_checks
     - avoid_dynamic_calls
     - avoid_empty_else

lib/ui/isolate_name_server.dart

@@ -19,11 +19,7 @@ part of dart.ui;
 /// communication or multiple-message communication is necessary, it is
 /// recommended to establish a separate communication channel in that first
 /// message (e.g. by passing a dedicated [SendPort]).
-class IsolateNameServer {
-  // This class is not meant to be instantiated or extended; this constructor
-  // prevents instantiation and extension.
-  IsolateNameServer._();
-
+abstract final class IsolateNameServer {
   /// Looks up the [SendPort] associated with a given name.
   ///
   /// Returns null if the name does not exist. To register the name in the first

lib/ui/natives.dart

@@ -6,11 +6,7 @@ part of dart.ui;
 // ignore_for_file: avoid_classes_with_only_static_members
 
 /// Helper functions for Dart Plugin Registrants.
-class DartPluginRegistrant {
-  // This class is not meant to be instantiated or extended; this constructor
-  // prevents instantiation and extension.
-  DartPluginRegistrant._();
-
+abstract final class DartPluginRegistrant {
   static bool _wasInitialized = false;
 
   /// Makes sure the that the Dart Plugin Registrant has been called for this

lib/ui/plugins.dart

@@ -39,11 +39,7 @@ class CallbackHandle {
 ///
 ///  * [IsolateNameServer], which provides utilities for dealing with
 ///    [Isolate]s.
-class PluginUtilities {
-  // This class is not meant to be instantiated or extended; this constructor
-  // prevents instantiation and extension.
-  PluginUtilities._();
-
+abstract final class PluginUtilities {
   static final Map<Function, CallbackHandle?> _forwardCache =
       <Function, CallbackHandle?>{};
   static final Map<CallbackHandle, Function?> _backwardCache =

lib/web_ui/lib/src/engine/html/path/path_utils.dart

@@ -26,11 +26,7 @@ class SPathVerb {
   static const int kClose = 5; // 0 points
 }
 
-abstract class SPath {
-  // This class is not meant to be instantiated or extended; this constructor
-  // prevents instantiation and extension.
-  SPath._();
-
+abstract final class SPath {
   static const int kMoveVerb = SPathVerb.kMove;
   static const int kLineVerb = SPathVerb.kLine;
   static const int kQuadVerb = SPathVerb.kQuad;

lib/web_ui/lib/src/engine/html/shaders/vertex_shaders.dart

@@ -10,11 +10,7 @@ import '../../browser_detection.dart';
 import 'shader_builder.dart';
 
 /// Provides common shaders used for gradients and drawVertices APIs.
-abstract class VertexShaders {
-  // This class is not meant to be instantiated or extended; this constructor
-  // prevents instantiation and extension.
-  VertexShaders._();
-
+abstract final class VertexShaders {
   static final Uint16List vertexIndicesForRect =
       Uint16List.fromList(<int>[0, 1, 2, 2, 3, 0]);
 
@@ -73,11 +69,7 @@ abstract class VertexShaders {
   }
 }
 
-abstract class FragmentShaders {
-  // This class is not meant to be instantiated or extended; this constructor
-  // prevents instantiation and extension.
-  FragmentShaders._();
-
+abstract final class FragmentShaders {
   static String writeTextureFragmentShader(
       bool isWebGl2, ui.TileMode? tileModeX, ui.TileMode? tileModeY) {
     final ShaderBuilder builder = ShaderBuilder.fragment(webGLVersion);

lib/web_ui/lib/src/engine/text/word_breaker.dart

@@ -15,11 +15,7 @@ class _FindBreakDirection {
 }
 
 /// [WordBreaker] exposes static methods to identify word boundaries.
-abstract class WordBreaker {
-  // This class is not meant to be instantiated or extended; this constructor
-  // prevents instantiation and extension.
-  WordBreaker._();
-
+abstract final class WordBreaker {
   /// It starts from [index] and tries to find the next word boundary in [text].
   static int nextBreakIndex(String text, int index) =>
       _findBreakIndex(_FindBreakDirection.forward, text, index);

lib/web_ui/lib/window.dart

@@ -173,11 +173,7 @@ class CallbackHandle {
 }
 
 // TODO(dit): see https://github.com/flutter/flutter/issues/33615.
-class PluginUtilities {
-  // This class is only a namespace, and should not be instantiated or
-  // extended directly.
-  factory PluginUtilities._() => throw UnsupportedError('Namespace');
-
+abstract final class PluginUtilities {
   static CallbackHandle? getCallbackHandle(Function callback) {
     throw UnimplementedError();
   }
@@ -187,11 +183,7 @@ class PluginUtilities {
   }
 }
 
-class IsolateNameServer {
-  // This class is only a namespace, and should not be instantiated or
-  // extended directly.
-  factory IsolateNameServer._() => throw UnsupportedError('Namespace');
-
+abstract final class IsolateNameServer {
   static dynamic lookupPortByName(String name) {
     throw UnimplementedError();
   }

lib/web_ui/pubspec.yaml

@@ -18,7 +18,6 @@ dependencies:
     path: ../../third_party/web_test_fonts
 
 dev_dependencies:
-  analyzer: 5.2.0
   archive: 3.1.2
   args: any
   async: any

tools/api_check/lib/apicheck.dart

@@ -12,7 +12,6 @@ import 'package:analyzer/dart/analysis/results.dart';
 import 'package:analyzer/dart/analysis/session.dart';
 import 'package:analyzer/dart/analysis/utilities.dart';
 import 'package:analyzer/dart/ast/ast.dart';
-import 'package:pub_semver/pub_semver.dart';
 
 /// Returns all indexed fields in [className].
 ///
@@ -163,10 +162,7 @@ List<String> _getBlockStartingWith({
 /// Apply a visitor to all compilation units in the dart:ui library.
 void visitUIUnits(String flutterRoot, AstVisitor<void> visitor) {
   final String uiRoot = '$flutterRoot/lib/ui';
-  final FeatureSet analyzerFeatures = FeatureSet.fromEnableFlags2(
-    sdkLanguageVersion: Version.parse('2.17.0'),
-    flags: <String>['non-nullable'],
-  );
+  final FeatureSet analyzerFeatures = FeatureSet.latestLanguageVersion();
   final ParseStringResult uiResult = parseFile(path: '$uiRoot/ui.dart', featureSet: analyzerFeatures);
   for (final PartDirective part in uiResult.unit.directives.whereType<PartDirective>()) {
     final String partPath = part.uri.stringValue!;

web_sdk/pubspec.yaml

@@ -9,5 +9,6 @@ dependencies:
   path: 1.8.2
 
 dev_dependencies:
-  analyzer: 4.3.1
+  analyzer: 5.7.1
   test: 1.22.1
+  pub_semver: 2.1.3

web_sdk/test/api_conform_test.dart

@@ -10,6 +10,7 @@ import 'package:analyzer/dart/analysis/features.dart';
 import 'package:analyzer/dart/analysis/results.dart';
 import 'package:analyzer/dart/analysis/utilities.dart';
 import 'package:analyzer/dart/ast/ast.dart';
+import 'package:pub_semver/pub_semver.dart';
 
 // Ignore members defined on Object.
 const Set<String> _kObjectMembers = <String>{
@@ -19,7 +20,10 @@ const Set<String> _kObjectMembers = <String>{
 };
 
 CompilationUnit _parseAndCheckDart(String path) {
-  final FeatureSet analyzerFeatures = FeatureSet.latestLanguageVersion();
+  final FeatureSet analyzerFeatures = FeatureSet.fromEnableFlags2(
+    flags: <String>['class-modifiers', 'sealed-class', 'records', 'patterns'],
+    sdkLanguageVersion: Version.parse('3.0.0-0'),
+  );
   if (!analyzerFeatures.isEnabled(Feature.non_nullable)) {
     throw Exception('non-nullable feature is disabled.');
   }
@@ -120,20 +124,20 @@ void main() {
               uiConstructor.parameters.parameters[i];
           final FormalParameter webParam =
               webConstructor.parameters.parameters[i];
-          if (webParam.identifier!.name != uiParam.identifier!.name) {
+          if (webParam.name!.lexeme != uiParam.name!.lexeme) {
             failed = true;
             print('Warning: lib/ui/ui.dart $className.$name parameter $i'
-                ' ${uiParam.identifier!.name} has a different name in lib/web_ui/ui.dart.');
+                ' ${uiParam.name!.lexeme} has a different name in lib/web_ui/ui.dart.');
           }
           if (uiParam.isPositional != webParam.isPositional) {
             failed = true;
             print('Warning: lib/ui/ui.dart $className.$name parameter $i'
-                '${uiParam.identifier!.name} is positional, but not in lib/web_ui/ui.dart.');
+                '${uiParam.name!.lexeme} is positional, but not in lib/web_ui/ui.dart.');
           }
           if (uiParam.isNamed != webParam.isNamed) {
             failed = true;
             print('Warning: lib/ui/ui.dart $className.$name parameter $i'
-                '${uiParam.identifier!.name} is named, but not in lib/web_ui/ui.dart.');
+                '${uiParam.name!.lexeme} is named, but not in lib/web_ui/ui.dart.');
           }
         }
       }
@@ -170,20 +174,20 @@ void main() {
           i++) {
         final FormalParameter uiParam = uiMethod.parameters!.parameters[i];
         final FormalParameter webParam = webMethod.parameters!.parameters[i];
-        if (webParam.identifier!.name != uiParam.identifier!.name) {
+        if (webParam.name!.lexeme != uiParam.name!.lexeme) {
           failed = true;
           print('Warning: lib/ui/ui.dart $className.$methodName parameter $i'
-              ' ${uiParam.identifier!.name} has a different name in lib/web_ui/ui.dart.');
+              ' ${uiParam.name!.lexeme} has a different name in lib/web_ui/ui.dart.');
         }
         if (uiParam.isPositional != webParam.isPositional) {
           failed = true;
           print('Warning: lib/ui/ui.dart $className.$methodName parameter $i'
-              '${uiParam.identifier!.name} is positional, but not in lib/web_ui/ui.dart.');
+              '${uiParam.name!.lexeme} is positional, but not in lib/web_ui/ui.dart.');
         }
         if (uiParam.isNamed != webParam.isNamed) {
           failed = true;
           print('Warning: lib/ui/ui.dart $className.$methodName parameter $i'
-              '${uiParam.identifier!.name} is named, but not in lib/web_ui/ui.dart.');
+              '${uiParam.name!.lexeme} is named, but not in lib/web_ui/ui.dart.');
         }
         // check nullability
         if (uiParam is SimpleFormalParameter &&
@@ -193,7 +197,7 @@ void main() {
           if (isUiNullable != isWebNullable) {
             failed = true;
             print('Warning: lib/ui/ui.dart $className.$methodName parameter $i '
-                '${uiParam.identifier} has a different nullability than in lib/web_ui/ui.dart.');
+                '${uiParam.name} has a different nullability than in lib/web_ui/ui.dart.');
           }
         }
       }
@@ -247,36 +251,36 @@ void main() {
       final SimpleFormalParameter webParam =
           (webTypeDef.type as GenericFunctionType).parameters.parameters[i]
               as SimpleFormalParameter;
-      if (webParam.identifier == null) {
+      if (webParam.name == null) {
         failed = true;
         print('Warning: lib/web_ui/ui.dart $typeDefName parameter $i should have name.');
       }
-      if (uiParam.identifier == null) {
+      if (uiParam.name == null) {
         failed = true;
         print('Warning: lib/ui/ui.dart $typeDefName parameter $i should have name.');
       }
-      if (webParam.identifier?.name != uiParam.identifier?.name) {
+      if (webParam.name?.lexeme != uiParam.name?.lexeme) {
         failed = true;
         print('Warning: lib/ui/ui.dart $typeDefName parameter $i '
-            '${uiParam.identifier!.name} has a different name in lib/web_ui/ui.dart.');
+            '${uiParam.name!.lexeme} has a different name in lib/web_ui/ui.dart.');
       }
       if (uiParam.isPositional != webParam.isPositional) {
         failed = true;
         print('Warning: lib/ui/ui.dart $typeDefName parameter $i '
-            '${uiParam.identifier!.name} is positional, but not in lib/web_ui/ui.dart.');
+            '${uiParam.name!.lexeme} is positional, but not in lib/web_ui/ui.dart.');
       }
       if (uiParam.isNamed != webParam.isNamed) {
         failed = true;
         print('Warning: lib/ui/ui.dart $typeDefName parameter $i '
-            '${uiParam.identifier!.name} is named, but not in lib/web_ui/ui.dart.');
+            '${uiParam.name!.lexeme}} is named, but not in lib/web_ui/ui.dart.');
       }
 
       final bool isUiNullable = uiParam.type?.question != null;
       final bool isWebNullable = webParam.type?.question != null;
       if (isUiNullable != isWebNullable) {
         failed = true;
         print('Warning: lib/ui/ui.dart $typeDefName parameter $i '
-            '${uiParam.identifier} has a different nullability than in lib/web_ui/ui.dart.');
+            '${uiParam.name} has a different nullability than in lib/web_ui/ui.dart.');
       }
     }
 
@@ -315,10 +319,10 @@ void _collectPublicClasses(CompilationUnit unit,
         continue;
       }
       final ClassDeclaration classDeclaration = member;
-      if (classDeclaration.name.name.startsWith('_')) {
+      if (classDeclaration.name.lexeme.startsWith('_')) {
         continue;
       }
-      destination[classDeclaration.name.name] = classDeclaration;
+      destination[classDeclaration.name.lexeme] = classDeclaration;
     }
   }
 }
@@ -329,7 +333,7 @@ void _collectPublicConstructors(ClassDeclaration classDeclaration,
     if (member is! ConstructorDeclaration) {
       continue;
     }
-    final String? methodName = member.name?.name;
+    final String? methodName = member.name?.lexeme;
     if (methodName == null) {
       destination['Unnamed Constructor'] = member;
       continue;
@@ -347,10 +351,10 @@ void _collectPublicMethods(ClassDeclaration classDeclaration,
     if (member is! MethodDeclaration) {
       continue;
     }
-    if (member.name.name.startsWith('_')) {
+    if (member.name.lexeme.startsWith('_')) {
       continue;
     }
-    destination[member.name.name] = member;
+    destination[member.name.lexeme] = member;
   }
 }
 
@@ -369,10 +373,10 @@ void _collectPublicTypeDefs(CompilationUnit unit,
         continue;
       }
       final GenericTypeAlias typeDeclaration = member;
-      if (typeDeclaration.name.name.startsWith('_')) {
+      if (typeDeclaration.name.lexeme.startsWith('_')) {
         continue;
       }
-      destination[typeDeclaration.name.name] = typeDeclaration;
+      destination[typeDeclaration.name.lexeme] = typeDeclaration;
     }
   }
 }

web_sdk/web_test_utils/pubspec.yaml

@@ -5,7 +5,7 @@ environment:
   sdk: '>=3.0.0-0 <4.0.0'
 
 dependencies:
-  collection: 1.15.0
+  collection: 1.17.0
   crypto: 3.0.1
   image: 3.0.1
   js: 0.6.4