lib: drop unnecessary new and const

CoreLibraryReviewExempt: no API changes
TEST=no behavior changes
Change-Id: Ibef80bbfb000026042e562014b672258a5f1860d
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/419761
Reviewed-by: Lasse Nielsen <lrn@google.com>
Reviewed-by: Liam Appelbe <liama@google.com>
Commit-Queue: Kevin Moore <kevmoo@google.com>

sdk/lib/_internal/vm/bin/builtin.dart

@@ -189,7 +189,7 @@ void _requestPackagesMap(Uri? packageConfig) {
     assert(msg.length >= 2);
     assert(msg[1] == null);
     _packageConfig = Uri.parse(msg[0]);
-    final pmap = new Map<String, Uri>();
+    final pmap = Map<String, Uri>();
     _packageMap = pmap;
     for (var i = 2; i < msg.length; i += 2) {
       // TODO(iposva): Complain about duplicate entries.
@@ -335,7 +335,7 @@ _findPackagesConfiguration(bool traceLoading, Uri base) {
     // of
     //   - .packages (preferred)
     //   - .dart_tool/package_config.json
-    var currentDir = new File.fromUri(base).parent;
+    var currentDir = File.fromUri(base).parent;
     while (true) {
       final dirUri = currentDir.uri;
 
@@ -497,7 +497,7 @@ void _Init(
   _setupHooks();
 
   // _workingDirectory must be set first.
-  _workingDirectory = new Uri.directory(workingDirectory);
+  _workingDirectory = Uri.directory(workingDirectory);
 
   // setup _rootScript.
   if (rootScript != null) {
@@ -521,7 +521,7 @@ void _setWorkingDirectory(String cwd) {
   if (_traceLoading) {
     _log('Setting working directory: $cwd');
   }
-  _workingDirectory = new Uri.directory(cwd);
+  _workingDirectory = Uri.directory(cwd);
   if (_traceLoading) {
     _log('Working directory URI: $_workingDirectory');
   }

sdk/lib/_internal/vm/bin/directory_patch.dart

@@ -53,7 +53,7 @@ class _Directory {
 class _AsyncDirectoryListerOps {
   @patch
   factory _AsyncDirectoryListerOps(int pointer) =>
-      new _AsyncDirectoryListerOpsImpl(pointer);
+      _AsyncDirectoryListerOpsImpl(pointer);
 }
 
 base class _AsyncDirectoryListerOpsImpl extends NativeFieldWrapperClass1
@@ -61,7 +61,7 @@ base class _AsyncDirectoryListerOpsImpl extends NativeFieldWrapperClass1
   _AsyncDirectoryListerOpsImpl._();
 
   factory _AsyncDirectoryListerOpsImpl(int pointer) =>
-      new _AsyncDirectoryListerOpsImpl._().._setPointer(pointer);
+      _AsyncDirectoryListerOpsImpl._().._setPointer(pointer);
 
   @pragma("vm:external-name", "Directory_SetAsyncDirectoryListerPointer")
   external void _setPointer(int pointer);
@@ -79,13 +79,13 @@ Uri _uriBaseClosure() {
   }
   var result = _Directory._current(_Namespace._namespace);
   if (result is OSError) {
-    throw new FileSystemException._fromOSError(
+    throw FileSystemException._fromOSError(
       result,
       "Getting current working directory failed",
       "",
     );
   }
-  return new Uri.directory(result as String);
+  return Uri.directory(result as String);
 }
 
 @pragma("vm:entry-point", "call")

sdk/lib/_internal/vm/bin/file_patch.dart

@@ -91,7 +91,7 @@ class _File {
 class _RandomAccessFileOps {
   @patch
   factory _RandomAccessFileOps(int pointer) =>
-      new _RandomAccessFileOpsImpl(pointer);
+      _RandomAccessFileOpsImpl(pointer);
 }
 
 @pragma("vm:entry-point")
@@ -100,7 +100,7 @@ base class _RandomAccessFileOpsImpl extends NativeFieldWrapperClass1
   _RandomAccessFileOpsImpl._();
 
   factory _RandomAccessFileOpsImpl(int pointer) =>
-      new _RandomAccessFileOpsImpl._().._setPointer(pointer);
+      _RandomAccessFileOpsImpl._().._setPointer(pointer);
 
   @pragma("vm:external-name", "File_SetPointer")
   external void _setPointer(int pointer);
@@ -156,7 +156,7 @@ abstract class _FileSystemWatcher {
   _WatcherPath? _watcherPath;
 
   final StreamController<FileSystemEvent> _broadcastController =
-      new StreamController<FileSystemEvent>.broadcast();
+      StreamController<FileSystemEvent>.broadcast();
 
   /// Subscription on the stream returned by [_watchPath].
   ///
@@ -171,26 +171,22 @@ abstract class _FileSystemWatcher {
     bool recursive,
   ) {
     if (Platform.isLinux || Platform.isAndroid) {
-      return new _InotifyFileSystemWatcher(path, events, recursive)._stream;
+      return _InotifyFileSystemWatcher(path, events, recursive)._stream;
     }
     if (Platform.isWindows) {
-      return new _Win32FileSystemWatcher(path, events, recursive)._stream;
+      return _Win32FileSystemWatcher(path, events, recursive)._stream;
     }
     if (Platform.isMacOS) {
-      return new _FSEventStreamFileSystemWatcher(
-        path,
-        events,
-        recursive,
-      )._stream;
+      return _FSEventStreamFileSystemWatcher(path, events, recursive)._stream;
     }
-    throw new FileSystemException(
+    throw FileSystemException(
       "File system watching is not supported on this platform",
     );
   }
 
   _FileSystemWatcher._(this._path, this._events, this._recursive) {
     if (!isSupported) {
-      throw new FileSystemException(
+      throw FileSystemException(
         "File system watching is not supported on this platform",
         _path,
       );
@@ -236,7 +232,7 @@ abstract class _FileSystemWatcher {
       return;
     }
     if (!_idMap.containsKey(pathId)) {
-      _idMap[pathId] = new _WatcherPath(pathId, _path, _events);
+      _idMap[pathId] = _WatcherPath(pathId, _path, _events);
     }
     _watcherPath = _idMap[pathId];
     _watcherPath!.count++;
@@ -324,9 +320,9 @@ abstract class _FileSystemWatcher {
 
         void rewriteMove(event, isDir) {
           if (event[3]) {
-            add(event[4], new FileSystemCreateEvent(getPath(event), isDir));
+            add(event[4], FileSystemCreateEvent(getPath(event), isDir));
           } else {
-            add(event[4], new FileSystemDeleteEvent(getPath(event), false));
+            add(event[4], FileSystemDeleteEvent(getPath(event), false));
           }
         }
 
@@ -344,13 +340,13 @@ abstract class _FileSystemWatcher {
             bool isDir = getIsDir(event);
             var path = getPath(event);
             if ((event[0] & FileSystemEvent.create) != 0) {
-              add(event[4], new FileSystemCreateEvent(path, isDir));
+              add(event[4], FileSystemCreateEvent(path, isDir));
             }
             if ((event[0] & FileSystemEvent.modify) != 0) {
-              add(event[4], new FileSystemModifyEvent(path, isDir, true));
+              add(event[4], FileSystemModifyEvent(path, isDir, true));
             }
             if ((event[0] & FileSystemEvent._modifyAttributes) != 0) {
-              add(event[4], new FileSystemModifyEvent(path, isDir, false));
+              add(event[4], FileSystemModifyEvent(path, isDir, false));
             }
             if ((event[0] & FileSystemEvent.move) != 0) {
               int link = event[1];
@@ -359,7 +355,7 @@ abstract class _FileSystemWatcher {
                 if (pair[pathId].containsKey(link)) {
                   add(
                     event[4],
-                    new FileSystemMoveEvent(
+                    FileSystemMoveEvent(
                       getPath(pair[pathId][link]),
                       isDir,
                       path,
@@ -374,10 +370,10 @@ abstract class _FileSystemWatcher {
               }
             }
             if ((event[0] & FileSystemEvent.delete) != 0) {
-              add(event[4], new FileSystemDeleteEvent(path, false));
+              add(event[4], FileSystemDeleteEvent(path, false));
             }
             if ((event[0] & FileSystemEvent._deleteSelf) != 0) {
-              add(event[4], new FileSystemDeleteEvent(path, false));
+              add(event[4], FileSystemDeleteEvent(path, false));
               // Signal done event.
               stops.add([event[4], null]);
             }
@@ -479,7 +475,7 @@ class _InotifyFileSystemWatcher extends _FileSystemWatcher {
   Stream<FileSystemEvent> _pathWatched() {
     var pathId = _watcherPath!.pathId;
     if (!_idMap.containsKey(pathId)) {
-      _idMap[pathId] = new StreamController<FileSystemEvent>.broadcast();
+      _idMap[pathId] = StreamController<FileSystemEvent>.broadcast();
     }
     return _idMap[pathId]!.stream;
   }
@@ -501,7 +497,7 @@ class _Win32FileSystemWatcher extends _FileSystemWatcher {
 
   Stream<FileSystemEvent> _pathWatched() {
     var pathId = _watcherPath!.pathId;
-    _controller = new StreamController<FileSystemEvent>();
+    _controller = StreamController<FileSystemEvent>();
     _subscription = _FileSystemWatcher._listenOnSocket(
       pathId,
       0,
@@ -533,7 +529,7 @@ class _FSEventStreamFileSystemWatcher extends _FileSystemWatcher {
   Stream<FileSystemEvent> _pathWatched() {
     var pathId = _watcherPath!.pathId;
     var socketId = _FileSystemWatcher._getSocketId(0, pathId);
-    _controller = new StreamController<FileSystemEvent>();
+    _controller = StreamController<FileSystemEvent>();
     _subscription = _FileSystemWatcher._listenOnSocket(
       socketId,
       0,
@@ -556,5 +552,5 @@ class _FSEventStreamFileSystemWatcher extends _FileSystemWatcher {
 
 @pragma("vm:entry-point", "call")
 Uint8List _makeUint8ListView(Uint8List source, int offsetInBytes, int length) {
-  return new Uint8List.view(source.buffer, offsetInBytes, length);
+  return Uint8List.view(source.buffer, offsetInBytes, length);
 }

sdk/lib/_internal/vm/bin/filter_patch.dart

@@ -66,7 +66,7 @@ class RawZLibFilter {
     int strategy,
     List<int>? dictionary,
     bool raw,
-  ) => new _ZLibDeflateFilter(
+  ) => _ZLibDeflateFilter(
     gzip,
     level,
     windowBits,
@@ -81,5 +81,5 @@ class RawZLibFilter {
     int windowBits,
     List<int>? dictionary,
     bool raw,
-  ) => new _ZLibInflateFilter(gzip, windowBits, dictionary, raw);
+  ) => _ZLibInflateFilter(gzip, windowBits, dictionary, raw);
 }

sdk/lib/_internal/vm/bin/io_service_patch.dart

@@ -17,7 +17,7 @@ class _IOService {
     assert(data.length == 2);
     _forwardResponse(data[0] as int, data[1]);
   }, 'IO Service');
-  static HashMap<int, Completer> _messageMap = new HashMap<int, Completer>();
+  static HashMap<int, Completer> _messageMap = HashMap<int, Completer>();
   static int _id = 0;
 
   @patch
@@ -26,7 +26,7 @@ class _IOService {
     do {
       id = _getNextId();
     } while (_messageMap.containsKey(id));
-    final Completer completer = new Completer();
+    final Completer completer = Completer();
     try {
       if (_messageMap.isEmpty) {
         // This is the first outgoing request after being in an idle state,

sdk/lib/_internal/vm/bin/namespace_patch.dart

@@ -20,14 +20,14 @@ base class _NamespaceImpl extends NativeFieldWrapperClass1
   // embedder with the platform-specific namespace information.
   static _NamespaceImpl? _cachedNamespace = null;
   static void _setupNamespace(var namespace) {
-    _cachedNamespace = _create(new _NamespaceImpl._(), namespace);
+    _cachedNamespace = _create(_NamespaceImpl._(), namespace);
   }
 
   static _NamespaceImpl get _namespace {
     if (_cachedNamespace == null) {
       // The embedder has not supplied a namespace before one is needed, so
       // instead use a safe-ish default value.
-      _cachedNamespace = _create(new _NamespaceImpl._(), _getDefault());
+      _cachedNamespace = _create(_NamespaceImpl._(), _getDefault());
     }
     return _cachedNamespace!;
   }

sdk/lib/_internal/vm/bin/platform_patch.dart

@@ -60,7 +60,7 @@ class _Platform {
           path.startsWith('file:')) {
         return Uri.parse(path);
       } else {
-        return Uri.base.resolveUri(new Uri.file(path));
+        return Uri.base.resolveUri(Uri.file(path));
       }
     });
   }

sdk/lib/_internal/vm/bin/process_patch.dart

@@ -30,7 +30,7 @@ class Process {
     bool runInShell = false,
     ProcessStartMode mode = ProcessStartMode.normal,
   }) {
-    _ProcessImpl process = new _ProcessImpl(
+    _ProcessImpl process = _ProcessImpl(
       executable,
       arguments,
       workingDirectory,
@@ -96,12 +96,12 @@ class Process {
   }
 }
 
-List<_SignalController?> _signalControllers = new List.filled(32, null);
+List<_SignalController?> _signalControllers = List.filled(32, null);
 
 class _SignalController {
   final ProcessSignal signal;
 
-  final _controller = new StreamController<ProcessSignal>.broadcast();
+  final _controller = StreamController<ProcessSignal>.broadcast();
   var _id;
 
   _SignalController(this.signal) {
@@ -115,13 +115,11 @@ class _SignalController {
   void _listen() {
     var id = _setSignalHandler(signal.signalNumber);
     if (id is! int) {
-      _controller.addError(
-        new SignalException("Failed to listen for $signal", id),
-      );
+      _controller.addError(SignalException("Failed to listen for $signal", id));
       return;
     }
     _id = id;
-    var socket = new _RawSocket(new _NativeSocket.watchSignal(id));
+    var socket = _RawSocket(_NativeSocket.watchSignal(id));
     socket.listen((event) {
       if (event == RawSocketEvent.read) {
         var bytes = socket.read()!;
@@ -176,16 +174,14 @@ class _ProcessUtils {
             (signal != ProcessSignal.sigusr1 &&
                 signal != ProcessSignal.sigusr2 &&
                 signal != ProcessSignal.sigwinch))) {
-      throw new SignalException(
-        "Listening for signal $signal is not supported",
-      );
+      throw SignalException("Listening for signal $signal is not supported");
     }
     return _watchSignalInternal(signal);
   }
 
   static Stream<ProcessSignal> _watchSignalInternal(ProcessSignal signal) {
     if (_signalControllers[signal.signalNumber] == null) {
-      _signalControllers[signal.signalNumber] = new _SignalController(signal);
+      _signalControllers[signal.signalNumber] = _SignalController(signal);
     }
     return _signalControllers[signal.signalNumber]!.stream;
   }
@@ -299,14 +295,14 @@ base class _ProcessImpl extends _ProcessImplNativeWrapper implements _Process {
 
     if (_modeHasStdio(_mode)) {
       // stdin going to process.
-      _stdin = new _StdSink(new _Socket._writePipe().._owner = this);
+      _stdin = _StdSink(_Socket._writePipe().._owner = this);
       // stdout coming from process.
-      _stdout = new _StdStream(new _Socket._readPipe().._owner = this);
+      _stdout = _StdStream(_Socket._readPipe().._owner = this);
       // stderr coming from process.
-      _stderr = new _StdStream(new _Socket._readPipe().._owner = this);
+      _stderr = _StdStream(_Socket._readPipe().._owner = this);
     }
     if (_modeIsAttached(_mode)) {
-      _exitHandler = new _Socket._readPipe();
+      _exitHandler = _Socket._readPipe();
     }
   }
 
@@ -346,7 +342,7 @@ base class _ProcessImpl extends _ProcessImplNativeWrapper implements _Process {
         shellArguments.add(arg);
       }
     } else {
-      var commandLine = new StringBuffer();
+      var commandLine = StringBuffer();
       executable = executable.replaceAll("'", "'\"'\"'");
       commandLine.write("'$executable'");
       shellArguments.add("-c");
@@ -373,7 +369,7 @@ base class _ProcessImpl extends _ProcessImplNativeWrapper implements _Process {
       // Replace any number of '\' followed by '"' with
       // twice as many '\' followed by '\"'.
       var backslash = '\\'.codeUnitAt(0);
-      var sb = new StringBuffer();
+      var sb = StringBuffer();
       var nextPos = 0;
       var quotePos = argument.indexOf('"', nextPos);
       while (quotePos != -1) {
@@ -396,7 +392,7 @@ base class _ProcessImpl extends _ProcessImplNativeWrapper implements _Process {
 
       // Add '"' at the beginning and end and replace all '\' at
       // the end with two '\'.
-      sb = new StringBuffer('"');
+      sb = StringBuffer('"');
       sb.write(result);
       nextPos = argument.length - 1;
       while (argument.codeUnitAt(nextPos) == backslash) {
@@ -418,15 +414,15 @@ base class _ProcessImpl extends _ProcessImplNativeWrapper implements _Process {
   }
 
   Future<Process> _start() {
-    var completer = new Completer<Process>();
+    var completer = Completer<Process>();
     var stackTrace = StackTrace.current;
     if (_modeIsAttached(_mode)) {
-      _exitCode = new Completer<int>();
+      _exitCode = Completer<int>();
     }
     // TODO(ager): Make the actual process starting really async instead of
     // simulating it with a timer.
     Timer.run(() {
-      var status = new _ProcessStartStatus();
+      var status = _ProcessStartStatus();
       bool success = _startNative(
         _Namespace._namespace,
         _path,
@@ -442,7 +438,7 @@ base class _ProcessImpl extends _ProcessImplNativeWrapper implements _Process {
       );
       if (!success) {
         completer.completeError(
-          new ProcessException(
+          ProcessException(
             _path,
             _arguments,
             status._errorMessage!,
@@ -454,14 +450,14 @@ base class _ProcessImpl extends _ProcessImplNativeWrapper implements _Process {
       }
 
       _started = true;
-      final resourceInfo = new _SpawnedProcessResourceInfo(this);
+      final resourceInfo = _SpawnedProcessResourceInfo(this);
 
       // Setup an exit handler to handle internal cleanup and possible
       // callback when a process terminates.
       if (_modeIsAttached(_mode)) {
         int exitDataRead = 0;
         final int EXIT_DATA_SIZE = 8;
-        List<int> exitDataBuffer = new List<int>.filled(EXIT_DATA_SIZE, 0);
+        List<int> exitDataBuffer = List<int>.filled(EXIT_DATA_SIZE, 0);
         _exitHandler.listen((data) {
           int exitCode(List<int> ints) {
             var code = _intFromBytes(ints, 0);
@@ -501,8 +497,8 @@ base class _ProcessImpl extends _ProcessImplNativeWrapper implements _Process {
     Encoding? stdoutEncoding,
     Encoding? stderrEncoding,
   ) {
-    var status = new _ProcessStartStatus();
-    _exitCode = new Completer<int>();
+    var status = _ProcessStartStatus();
+    _exitCode = Completer<int>();
     bool success = _startNative(
       _Namespace._namespace,
       _path,
@@ -517,7 +513,7 @@ base class _ProcessImpl extends _ProcessImplNativeWrapper implements _Process {
       status,
     );
     if (!success) {
-      throw new ProcessException(
+      throw ProcessException(
         _path,
         _arguments,
         status._errorMessage!,
@@ -525,7 +521,7 @@ base class _ProcessImpl extends _ProcessImplNativeWrapper implements _Process {
       );
     }
 
-    final resourceInfo = new _SpawnedProcessResourceInfo(this);
+    final resourceInfo = _SpawnedProcessResourceInfo(this);
 
     var result = _wait(
       _stdinNativeSocket,
@@ -541,7 +537,7 @@ base class _ProcessImpl extends _ProcessImplNativeWrapper implements _Process {
 
     resourceInfo.stopped();
 
-    return new ProcessResult(
+    return ProcessResult(
       result[0],
       result[1],
       getOutput(result[2], stdoutEncoding),
@@ -641,14 +637,14 @@ Future<ProcessResult> _runNonInteractiveProcess(
       if (encoding == null) {
         return stream
             .fold<BytesBuilder>(
-              new BytesBuilder(),
+              BytesBuilder(),
               (builder, data) => builder..add(data),
             )
             .then((builder) => builder.takeBytes());
       } else {
         return stream
             .transform(encoding.decoder)
-            .fold<StringBuffer>(new StringBuffer(), (buf, data) {
+            .fold<StringBuffer>(StringBuffer(), (buf, data) {
               buf.write(data);
               return buf;
             })
@@ -660,7 +656,7 @@ Future<ProcessResult> _runNonInteractiveProcess(
     Future stderr = foldStream(p.stderr, stderrEncoding);
 
     return Future.wait([p.exitCode, stdout, stderr]).then((result) {
-      return new ProcessResult(pid, result[0], result[1], result[2]);
+      return ProcessResult(pid, result[0], result[1], result[2]);
     });
   });
 }
@@ -675,7 +671,7 @@ ProcessResult _runNonInteractiveProcessSync(
   Encoding? stdoutEncoding,
   Encoding? stderrEncoding,
 ) {
-  var process = new _ProcessImpl(
+  var process = _ProcessImpl(
     executable,
     arguments,
     workingDirectory,

sdk/lib/_internal/vm/bin/secure_socket_patch.dart

@@ -7,14 +7,13 @@ part of "common_patch.dart";
 @patch
 class SecureSocket {
   @patch
-  factory SecureSocket._(RawSecureSocket rawSocket) =>
-      new _SecureSocket(rawSocket);
+  factory SecureSocket._(RawSecureSocket rawSocket) => _SecureSocket(rawSocket);
 }
 
 @patch
 class _SecureFilter {
   @patch
-  factory _SecureFilter._() => new _SecureFilterImpl._();
+  factory _SecureFilter._() => _SecureFilterImpl._();
 }
 
 @patch
@@ -22,7 +21,7 @@ class _SecureFilter {
 class X509Certificate {
   @patch
   @pragma("vm:entry-point")
-  factory X509Certificate._() => new _X509CertificateImpl._();
+  factory X509Certificate._() => _X509CertificateImpl._();
 }
 
 class _SecureSocket extends _Socket implements SecureSocket {
@@ -38,14 +37,14 @@ class _SecureSocket extends _Socket implements SecureSocket {
 
   X509Certificate? get peerCertificate {
     if (_raw == null) {
-      throw new StateError("peerCertificate called on destroyed SecureSocket");
+      throw StateError("peerCertificate called on destroyed SecureSocket");
     }
     return _raw!.peerCertificate;
   }
 
   String? get selectedProtocol {
     if (_raw == null) {
-      throw new StateError("selectedProtocol called on destroyed SecureSocket");
+      throw StateError("selectedProtocol called on destroyed SecureSocket");
     }
     return _raw!.selectedProtocol;
   }
@@ -74,7 +73,7 @@ base class _SecureFilterImpl extends NativeFieldWrapperClass1
   _SecureFilterImpl._() {
     buffers = <_ExternalBuffer>[
       for (int i = 0; i < _RawSecureSocket.bufferCount; ++i)
-        new _ExternalBuffer(
+        _ExternalBuffer(
           _RawSecureSocket._isBufferEncrypted(i) ? ENCRYPTED_SIZE : SIZE,
         ),
     ];
@@ -158,9 +157,9 @@ base class _SecureFilterImpl extends NativeFieldWrapperClass1
     }
   }
 
-  void rehandshake() => throw new UnimplementedError();
+  void rehandshake() => throw UnimplementedError();
 
-  int processBuffer(int bufferIndex) => throw new UnimplementedError();
+  int processBuffer(int bufferIndex) => throw UnimplementedError();
 
   @pragma("vm:external-name", "SecureSocket_GetSelectedProtocol")
   external String? selectedProtocol();
@@ -203,7 +202,7 @@ base class _SecureFilterImpl extends NativeFieldWrapperClass1
 class SecurityContext {
   @patch
   factory SecurityContext({bool withTrustedRoots = false}) {
-    return new _SecurityContext(withTrustedRoots);
+    return _SecurityContext(withTrustedRoots);
   }
 
   @patch
@@ -245,10 +244,10 @@ base class _SecurityContext extends NativeFieldWrapperClass1
   @pragma("vm:external-name", "SecurityContext_Allocate")
   external void _createNativeContext();
 
-  static final SecurityContext defaultContext = new _SecurityContext(true);
+  static final SecurityContext defaultContext = _SecurityContext(true);
 
   void usePrivateKey(String file, {String? password}) {
-    List<int> bytes = (new File(file)).readAsBytesSync();
+    List<int> bytes = (File(file)).readAsBytesSync();
     usePrivateKeyBytes(bytes, password: password);
   }
 
@@ -256,7 +255,7 @@ base class _SecurityContext extends NativeFieldWrapperClass1
   external void usePrivateKeyBytes(List<int> keyBytes, {String? password});
 
   void setTrustedCertificates(String file, {String? password}) {
-    List<int> bytes = (new File(file)).readAsBytesSync();
+    List<int> bytes = (File(file)).readAsBytesSync();
     setTrustedCertificatesBytes(bytes, password: password);
   }
 
@@ -267,7 +266,7 @@ base class _SecurityContext extends NativeFieldWrapperClass1
   });
 
   void useCertificateChain(String file, {String? password}) {
-    List<int> bytes = (new File(file)).readAsBytesSync();
+    List<int> bytes = (File(file)).readAsBytesSync();
     useCertificateChainBytes(bytes, password: password);
   }
 
@@ -278,7 +277,7 @@ base class _SecurityContext extends NativeFieldWrapperClass1
   });
 
   void setClientAuthorities(String file, {String? password}) {
-    List<int> bytes = (new File(file)).readAsBytesSync();
+    List<int> bytes = (File(file)).readAsBytesSync();
     setClientAuthoritiesBytes(bytes, password: password);
   }
 
@@ -334,14 +333,11 @@ base class _X509CertificateImpl extends NativeFieldWrapperClass1
   @pragma("vm:external-name", "X509_Issuer")
   external String get issuer;
   DateTime get startValidity {
-    return new DateTime.fromMillisecondsSinceEpoch(
-      _startValidity(),
-      isUtc: true,
-    );
+    return DateTime.fromMillisecondsSinceEpoch(_startValidity(), isUtc: true);
   }
 
   DateTime get endValidity {
-    return new DateTime.fromMillisecondsSinceEpoch(_endValidity(), isUtc: true);
+    return DateTime.fromMillisecondsSinceEpoch(_endValidity(), isUtc: true);
   }
 
   @pragma("vm:external-name", "X509_StartValidity")

sdk/lib/_internal/vm/bin/socket_patch.dart

@@ -141,7 +141,7 @@ void _throwOnBadPort(int port) {
   // TODO(40614): Remove once non-nullability is sound.
   ArgumentError.checkNotNull(port, "port");
   if ((port < 0) || (port > 0xFFFF)) {
-    throw new ArgumentError("Invalid port $port");
+    throw ArgumentError("Invalid port $port");
   }
 }
 
@@ -149,7 +149,7 @@ void _throwOnBadTtl(int ttl) {
   // TODO(40614): Remove once non-nullability is sound.
   ArgumentError.checkNotNull(ttl, "ttl");
   if (ttl < 1 || ttl > 255) {
-    throw new ArgumentError('Invalid ttl $ttl');
+    throw ArgumentError('Invalid ttl $ttl');
   }
 }
 
@@ -178,7 +178,7 @@ class _InternetAddress implements InternetAddress {
 
   String get host => _host ?? address;
 
-  Uint8List get rawAddress => new Uint8List.fromList(_in_addr);
+  Uint8List get rawAddress => Uint8List.fromList(_in_addr);
 
   bool get isLoopback {
     switch (type) {
@@ -194,7 +194,7 @@ class _InternetAddress implements InternetAddress {
       case InternetAddressType.unix:
         return false;
     }
-    throw new UnsupportedError("Unexpected address type $type");
+    throw UnsupportedError("Unexpected address type $type");
   }
 
   bool get isLinkLocal {
@@ -210,7 +210,7 @@ class _InternetAddress implements InternetAddress {
       case InternetAddressType.unix:
         return false;
     }
-    throw new UnsupportedError("Unexpected address type $type");
+    throw UnsupportedError("Unexpected address type $type");
   }
 
   bool get isMulticast {
@@ -226,7 +226,7 @@ class _InternetAddress implements InternetAddress {
       case InternetAddressType.unix:
         return false;
     }
-    throw new UnsupportedError("Unexpected address type $type");
+    throw UnsupportedError("Unexpected address type $type");
   }
 
   Future<InternetAddress> reverse() {
@@ -528,10 +528,8 @@ base class _NativeSocket extends _NativeSocketNativeWrapper
   static const int normalTokenBatchSize = 8;
   static const int listeningTokenBatchSize = 2;
 
-  static const Duration _retryDuration = const Duration(milliseconds: 250);
-  static const Duration _retryDurationLoopback = const Duration(
-    milliseconds: 25,
-  );
+  static const Duration _retryDuration = Duration(milliseconds: 250);
+  static const Duration _retryDurationLoopback = Duration(milliseconds: 25);
 
   // Socket close state
   bool isClosed = false;
@@ -539,7 +537,7 @@ base class _NativeSocket extends _NativeSocketNativeWrapper
   bool isClosedRead = false;
   bool closedReadEventSent = false;
   bool isClosedWrite = false;
-  Completer closeCompleter = new Completer.sync();
+  Completer closeCompleter = Completer.sync();
 
   // Handlers and receive port for socket events from the event handler.
   void Function()? readEventHandler;
@@ -633,7 +631,7 @@ base class _NativeSocket extends _NativeSocketNativeWrapper
         throw createError(response, "Failed listing interfaces");
       } else {
         var map = (response as List).skip(1).fold(
-          new Map<String, NetworkInterface>(),
+          Map<String, NetworkInterface>(),
           (map, result) {
             List<Object?> resultList = result as List<Object?>;
             var type = InternetAddressType._from(resultList[0] as int);
@@ -647,7 +645,7 @@ base class _NativeSocket extends _NativeSocketNativeWrapper
             );
             if (!includeLinkLocal && address.isLinkLocal) return map;
             if (!includeLoopback && address.isLoopback) return map;
-            map.putIfAbsent(name, () => new _NetworkInterface(name, index));
+            map.putIfAbsent(name, () => _NetworkInterface(name, index));
             (map[name] as _NetworkInterface).addresses.add(address);
             return map;
           },
@@ -665,7 +663,7 @@ base class _NativeSocket extends _NativeSocketNativeWrapper
       if (!checkLinkLocalAddress(host)) {
         // The only well defined usage is link-local address. Checks Section 4 of https://tools.ietf.org/html/rfc6874.
         // If it is not a valid link-local address and contains escape character, throw an exception.
-        throw new FormatException(
+        throw FormatException(
           '${host} is not a valid link-local address but contains %. Scope id should be used as part of link-local address.',
           host,
           index,
@@ -811,7 +809,7 @@ base class _NativeSocket extends _NativeSocketNativeWrapper
         }
         source = sourceAddress;
       } else if (sourceAddress is String) {
-        source = new _InternetAddress.fromString(sourceAddress);
+        source = _InternetAddress.fromString(sourceAddress);
       } else {
         throw ArgumentError.value(
           sourceAddress,
@@ -823,7 +821,7 @@ base class _NativeSocket extends _NativeSocketNativeWrapper
 
     final stackTrace = StackTrace.current;
 
-    return new Future.value(host).then<ConnectionTask<_NativeSocket>>((host) {
+    return Future.value(host).then<ConnectionTask<_NativeSocket>>((host) {
       if (host is String) {
         // Attempt to interpret the host as a numeric address
         // (e.g. "127.0.0.1"). This will prevent [InternetAddress.lookup] from
@@ -868,7 +866,7 @@ base class _NativeSocket extends _NativeSocketNativeWrapper
     StackTrace callerStackTrace,
   ) {
     // Completer for result.
-    final result = new Completer<_NativeSocket>();
+    final result = Completer<_NativeSocket>();
     // Error, set if an error occurs.
     // Keeps first error if multiple errors occur.
     var error = null;
@@ -1012,7 +1010,7 @@ base class _NativeSocket extends _NativeSocketNativeWrapper
         return;
       }
       final address = pendingLookedUp.removeFirst();
-      final socket = new _NativeSocket.normal(address);
+      final socket = _NativeSocket.normal(address);
       // Will contain values of various types representing the result
       // of trying to create a connection.
       // A value of `true` means success, everything else means failure.
@@ -1049,7 +1047,7 @@ base class _NativeSocket extends _NativeSocketNativeWrapper
       // succeed or fail later.
       final duration =
           address.isLoopback ? _retryDurationLoopback : _retryDuration;
-      timer = new Timer(duration, connectNext);
+      timer = Timer(duration, connectNext);
       connecting.add(socket);
       // Setup handlers for receiving the first write event which
       // indicate that the socket is fully connected.
@@ -1136,7 +1134,7 @@ base class _NativeSocket extends _NativeSocketNativeWrapper
     );
 
     connectNext();
-    return new ConnectionTask<_NativeSocket>._(result.future, onCancel);
+    return ConnectionTask<_NativeSocket>._(result.future, onCancel);
   }
 
   static Future<_NativeSocket> connect(
@@ -1196,7 +1194,7 @@ base class _NativeSocket extends _NativeSocketNativeWrapper
     }
     final address = await _resolveHost(host);
 
-    var socket = new _NativeSocket.listen(address);
+    var socket = _NativeSocket.listen(address);
     var result;
     if (address.type == InternetAddressType.unix) {
       var path = address.address;
@@ -1220,7 +1218,7 @@ base class _NativeSocket extends _NativeSocketNativeWrapper
       );
     }
     if (result is OSError) {
-      throw new SocketException(
+      throw SocketException(
         "Failed to create server socket",
         osError: result,
         address: address,
@@ -1244,7 +1242,7 @@ base class _NativeSocket extends _NativeSocketNativeWrapper
 
     final address = await _resolveHost(host);
 
-    var socket = new _NativeSocket.datagram(address);
+    var socket = _NativeSocket.datagram(address);
     var result = socket.nativeCreateBindDatagram(
       address._in_addr,
       port,
@@ -1253,7 +1251,7 @@ base class _NativeSocket extends _NativeSocketNativeWrapper
       ttl,
     );
     if (result is OSError) {
-      throw new SocketException(
+      throw SocketException(
         "Failed to create datagram socket",
         osError: result,
         address: address,
@@ -1295,8 +1293,8 @@ base class _NativeSocket extends _NativeSocketNativeWrapper
   bool get isTcp => (typeFlags & typeTcpSocket) != 0;
   bool get isUdp => (typeFlags & typeUdpSocket) != 0;
 
-  String get _serviceTypePath => throw new UnimplementedError();
-  String get _serviceTypeName => throw new UnimplementedError();
+  String get _serviceTypePath => throw UnimplementedError();
+  String get _serviceTypeName => throw UnimplementedError();
 
   Uint8List? read(int? count) {
     if (count != null && count <= 0) {
@@ -1431,14 +1429,14 @@ base class _NativeSocket extends _NativeSocketNativeWrapper
     offset = _fixOffset(offset);
     if (bytes == null) {
       if (offset > buffer.length) {
-        throw new RangeError.value(offset);
+        throw RangeError.value(offset);
       }
       bytes = buffer.length - offset;
     }
-    if (offset < 0) throw new RangeError.value(offset);
-    if (bytes < 0) throw new RangeError.value(bytes);
+    if (offset < 0) throw RangeError.value(offset);
+    if (bytes < 0) throw RangeError.value(bytes);
     if ((offset + bytes) > buffer.length) {
-      throw new RangeError.value(offset + bytes);
+      throw RangeError.value(offset + bytes);
     }
     if (isClosing || isClosed) return 0;
     if (bytes == 0) return 0;
@@ -1526,14 +1524,14 @@ base class _NativeSocket extends _NativeSocketNativeWrapper
     int? bytes,
     List<SocketControlMessage> controlMessages,
   ) {
-    if (offset < 0) throw new RangeError.value(offset);
+    if (offset < 0) throw RangeError.value(offset);
     if (bytes != null) {
-      if (bytes < 0) throw new RangeError.value(bytes);
+      if (bytes < 0) throw RangeError.value(bytes);
     } else {
       bytes = buffer.length - offset;
     }
     if ((offset + bytes) > buffer.length) {
-      throw new RangeError.value(offset + bytes);
+      throw RangeError.value(offset + bytes);
     }
     if (isClosing || isClosed) return 0;
     try {
@@ -1577,7 +1575,7 @@ base class _NativeSocket extends _NativeSocketNativeWrapper
     connections--;
     tokens++;
     returnTokens(listeningTokenBatchSize);
-    var socket = new _NativeSocket.normal(address);
+    var socket = _NativeSocket.normal(address);
     if (nativeAccept(socket) != true) return null;
     socket.localPort = localPort;
     return socket;
@@ -1606,7 +1604,7 @@ base class _NativeSocket extends _NativeSocketNativeWrapper
     if (isClosing || isClosed) throw const SocketException.closed();
     var result = nativeGetRemotePeer();
     var addr = result[0] as List<Object?>;
-    var type = new InternetAddressType._from(addr[0] as int);
+    var type = InternetAddressType._from(addr[0] as int);
     if (type == InternetAddressType.unix) {
       return _InternetAddress.fromString(
         addr[1] as String,
@@ -1835,7 +1833,7 @@ base class _NativeSocket extends _NativeSocketNativeWrapper
           close();
           break;
         default:
-          throw new ArgumentError(direction);
+          throw ArgumentError(direction);
       }
     }
   }
@@ -1875,7 +1873,7 @@ base class _NativeSocket extends _NativeSocketNativeWrapper
   void connectToEventHandler() {
     assert(!isClosed);
     if (eventPort == null) {
-      eventPort = new RawReceivePort(multiplex, 'Socket Event Handler');
+      eventPort = RawReceivePort(multiplex, 'Socket Event Handler');
     }
   }
 
@@ -1988,7 +1986,7 @@ base class _NativeSocket extends _NativeSocketNativeWrapper
           }
         }
         // No IPv4 address found on the interface.
-        throw new SocketException(
+        throw SocketException(
           "The network interface does not have an address "
           "of the same family as the multicast address",
         );
@@ -2152,14 +2150,14 @@ class _RawServerSocket extends Stream<RawSocket>
     bool shared,
   ) {
     _throwOnBadPort(port);
-    if (backlog < 0) throw new ArgumentError("Invalid backlog $backlog");
+    if (backlog < 0) throw ArgumentError("Invalid backlog $backlog");
     return _NativeSocket.bind(
       address,
       port,
       backlog,
       v6Only,
       shared,
-    ).then((socket) => new _RawServerSocket(socket, v6Only));
+    ).then((socket) => _RawServerSocket(socket, v6Only));
   }
 
   _RawServerSocket(this._socket, this._v6Only);
@@ -2171,11 +2169,11 @@ class _RawServerSocket extends Stream<RawSocket>
     bool? cancelOnError,
   }) {
     if (_controller != null) {
-      throw new StateError("Stream was already listened to");
+      throw StateError("Stream was already listened to");
     }
     var zone = Zone.current;
     final controller =
-        _controller = new StreamController(
+        _controller = StreamController(
           sync: true,
           onListen: _onSubscriptionStateChange,
           onCancel: _onSubscriptionStateChange,
@@ -2255,7 +2253,7 @@ class _RawServerSocket extends Stream<RawSocket>
 class _RawSocket extends Stream<RawSocketEvent>
     implements RawSocket, _RawSocketBase {
   final _NativeSocket _socket;
-  final _controller = new StreamController<RawSocketEvent>(sync: true);
+  final _controller = StreamController<RawSocketEvent>(sync: true);
   bool _readEventsEnabled = true;
   bool _writeEventsEnabled = true;
 
@@ -2345,17 +2343,17 @@ class _RawSocket extends Stream<RawSocketEvent>
   }
 
   factory _RawSocket._writePipe() {
-    var native = new _NativeSocket.pipe();
+    var native = _NativeSocket.pipe();
     native.isClosedRead = true;
     native.closedReadEventSent = true;
-    return new _RawSocket(native);
+    return _RawSocket(native);
   }
 
   factory _RawSocket._readPipe(int? fd) {
-    var native = new _NativeSocket.pipe();
+    var native = _NativeSocket.pipe();
     native.isClosedWrite = true;
     if (fd != null) _getStdioHandle(native, fd);
-    var result = new _RawSocket(native);
+    var result = _RawSocket(native);
     if (fd != null) {
       var socketType = _StdIOUtils._nativeSocketType(result._socket);
       result._isMacOSTerminalInput =
@@ -2515,7 +2513,7 @@ class _ServerSocket extends Stream<Socket> implements ServerSocket {
       backlog,
       v6Only,
       shared,
-    ).then((socket) => new _ServerSocket(socket));
+    ).then((socket) => _ServerSocket(socket));
   }
 
   _ServerSocket(this._socket);
@@ -2527,7 +2525,7 @@ class _ServerSocket extends Stream<Socket> implements ServerSocket {
     bool? cancelOnError,
   }) {
     return _socket
-        .map<Socket>((rawSocket) => new _Socket(rawSocket))
+        .map<Socket>((rawSocket) => _Socket(rawSocket))
         .listen(
           onData,
           onError: onError,
@@ -2564,7 +2562,7 @@ class Socket {
       sourceAddress: sourceAddress,
       sourcePort: sourcePort,
       timeout: timeout,
-    ).then((socket) => new _Socket(socket));
+    ).then((socket) => _Socket(socket));
   }
 
   @patch
@@ -2581,9 +2579,9 @@ class Socket {
       sourcePort: sourcePort,
     ).then((rawTask) {
       Future<Socket> socket = rawTask.socket.then(
-        (rawSocket) => new _Socket(rawSocket),
+        (rawSocket) => _Socket(rawSocket),
       );
-      return new ConnectionTask<Socket>._(socket, rawTask._onCancel);
+      return ConnectionTask<Socket>._(socket, rawTask._onCancel);
     });
   }
 }
@@ -2600,7 +2598,7 @@ class _SocketStreamConsumer implements StreamConsumer<List<int>> {
 
   Future<Socket> addStream(Stream<List<int>> stream) {
     socket._ensureRawSocketSubscription();
-    final completer = streamCompleter = new Completer<Socket>();
+    final completer = streamCompleter = Completer<Socket>();
     if (socket._raw != null) {
       subscription = stream.listen(
         (data) {
@@ -2640,7 +2638,7 @@ class _SocketStreamConsumer implements StreamConsumer<List<int>> {
 
   Future<Socket> close() {
     socket._consumerDone();
-    return new Future.value(socket);
+    return Future.value(socket);
   }
 
   bool get _previousWriteHasCompleted {
@@ -2710,7 +2708,7 @@ class _SocketStreamConsumer implements StreamConsumer<List<int>> {
 class _Socket extends Stream<Uint8List> implements Socket {
   RawSocket? _raw; // Set to null when the raw socket is closed.
   bool _closed = false; // Set to true when the raw socket is closed.
-  final _controller = new StreamController<Uint8List>(sync: true);
+  final _controller = StreamController<Uint8List>(sync: true);
   bool _controllerClosed = false;
   late _SocketStreamConsumer _consumer;
   late IOSink _sink;
@@ -2723,8 +2721,8 @@ class _Socket extends Stream<Uint8List> implements Socket {
       ..onCancel = _onSubscriptionStateChange
       ..onPause = _onPauseStateChange
       ..onResume = _onPauseStateChange;
-    _consumer = new _SocketStreamConsumer(this);
-    _sink = new IOSink(_consumer);
+    _consumer = _SocketStreamConsumer(this);
+    _sink = IOSink(_consumer);
 
     // Disable read events until there is a subscription.
     raw.readEventsEnabled = false;
@@ -2734,11 +2732,11 @@ class _Socket extends Stream<Uint8List> implements Socket {
   }
 
   factory _Socket._writePipe() {
-    return new _Socket(new _RawSocket._writePipe());
+    return _Socket(_RawSocket._writePipe());
   }
 
   factory _Socket._readPipe([int? fd]) {
-    return new _Socket(new _RawSocket._readPipe(fd));
+    return _Socket(_RawSocket._readPipe(fd));
   }
 
   // Note: this code seems a bit suspicious because _raw can be _RawSocket and
@@ -2783,7 +2781,7 @@ class _Socket extends Stream<Uint8List> implements Socket {
   /// Throws an [UnsupportedError] because errors cannot be transmitted over a
   /// [Socket].
   void addError(Object error, [StackTrace? stackTrace]) {
-    throw new UnsupportedError("Cannot send errors on sockets");
+    throw UnsupportedError("Cannot send errors on sockets");
   }
 
   Future addStream(Stream<List<int>> stream) {
@@ -2992,7 +2990,7 @@ class _RawDatagramSocket extends Stream<RawSocketEvent>
 
   _RawDatagramSocket(this._socket) {
     var zone = Zone.current;
-    _controller = new StreamController<RawSocketEvent>(
+    _controller = StreamController<RawSocketEvent>(
       sync: true,
       onListen: _onSubscriptionStateChange,
       onCancel: _onSubscriptionStateChange,
@@ -3160,7 +3158,7 @@ Datagram _makeDatagram(
   int port,
   int type,
 ) {
-  return new Datagram(
+  return Datagram(
     data,
     _InternetAddress(InternetAddressType._from(type), address, null, in_addr),
     port,

sdk/lib/_internal/vm/bin/stdio_patch.dart

@@ -21,11 +21,11 @@ class _StdIOUtils {
       case _stdioHandleTypePipe:
       case _stdioHandleTypeSocket:
       case _stdioHandleTypeOther:
-        return new Stdin._(new _Socket._readPipe(fd), fd);
+        return Stdin._(_Socket._readPipe(fd), fd);
       case _stdioHandleTypeFile:
-        return new Stdin._(new _FileStream.forStdin(), fd);
+        return Stdin._(_FileStream.forStdin(), fd);
     }
-    throw new UnsupportedError("Unexpected handle type $type");
+    throw UnsupportedError("Unexpected handle type $type");
   }
 
   @patch
@@ -38,7 +38,7 @@ class _StdIOUtils {
         type,
       );
     }
-    return new Stdout._(new IOSink(new _StdConsumer(fd)), fd);
+    return Stdout._(IOSink(_StdConsumer(fd)), fd);
   }
 
   @patch
@@ -50,7 +50,7 @@ class _StdIOUtils {
   static int _nativeSocketType(_NativeSocket nativeSocket) {
     var result = _getSocketType(nativeSocket);
     if (result is OSError) {
-      throw new FileSystemException("Error retrieving socket type", "", result);
+      throw FileSystemException("Error retrieving socket type", "", result);
     }
     return result;
   }
@@ -66,7 +66,7 @@ class Stdin {
   int readByteSync() {
     var result = _readByte(_fd);
     if (result is OSError) {
-      throw new StdinException("Error reading byte from stdin", result);
+      throw StdinException("Error reading byte from stdin", result);
     }
     return result;
   }
@@ -75,7 +75,7 @@ class Stdin {
   bool get echoMode {
     var result = _echoMode(_fd);
     if (result is OSError) {
-      throw new StdinException("Error getting terminal echo mode", result);
+      throw StdinException("Error getting terminal echo mode", result);
     }
     return result;
   }
@@ -83,13 +83,11 @@ class Stdin {
   @patch
   void set echoMode(bool enabled) {
     if (!_EmbedderConfig._maySetEchoMode) {
-      throw new UnsupportedError(
-        "This embedder disallows setting Stdin.echoMode",
-      );
+      throw UnsupportedError("This embedder disallows setting Stdin.echoMode");
     }
     var result = _setEchoMode(_fd, enabled);
     if (result is OSError) {
-      throw new StdinException("Error setting terminal echo mode", result);
+      throw StdinException("Error setting terminal echo mode", result);
     }
   }
 
@@ -97,10 +95,7 @@ class Stdin {
   bool get echoNewlineMode {
     var result = _echoNewlineMode(_fd);
     if (result is OSError) {
-      throw new StdinException(
-        "Error getting terminal echo newline mode",
-        result,
-      );
+      throw StdinException("Error getting terminal echo newline mode", result);
     }
     return result;
   }
@@ -108,16 +103,13 @@ class Stdin {
   @patch
   void set echoNewlineMode(bool enabled) {
     if (!_EmbedderConfig._maySetEchoNewlineMode) {
-      throw new UnsupportedError(
+      throw UnsupportedError(
         "This embedder disallows setting Stdin.echoNewlineMode",
       );
     }
     var result = _setEchoNewlineMode(_fd, enabled);
     if (result is OSError) {
-      throw new StdinException(
-        "Error setting terminal echo newline mode",
-        result,
-      );
+      throw StdinException("Error setting terminal echo newline mode", result);
     }
   }
 
@@ -125,7 +117,7 @@ class Stdin {
   bool get lineMode {
     var result = _lineMode(_fd);
     if (result is OSError) {
-      throw new StdinException("Error getting terminal line mode", result);
+      throw StdinException("Error getting terminal line mode", result);
     }
     return result;
   }
@@ -133,13 +125,11 @@ class Stdin {
   @patch
   void set lineMode(bool enabled) {
     if (!_EmbedderConfig._maySetLineMode) {
-      throw new UnsupportedError(
-        "This embedder disallows setting Stdin.lineMode",
-      );
+      throw UnsupportedError("This embedder disallows setting Stdin.lineMode");
     }
     var result = _setLineMode(_fd, enabled);
     if (result is OSError) {
-      throw new StdinException("Error setting terminal line mode", result);
+      throw StdinException("Error setting terminal line mode", result);
     }
   }
 
@@ -147,7 +137,7 @@ class Stdin {
   bool get supportsAnsiEscapes {
     var result = _supportsAnsiEscapes(_fd);
     if (result is OSError) {
-      throw new StdinException("Error determining ANSI support", result);
+      throw StdinException("Error determining ANSI support", result);
     }
     return result;
   }
@@ -182,7 +172,7 @@ class Stdout {
   static List _terminalSize(int fd) {
     var size = _getTerminalSize(fd);
     if (size is! List) {
-      throw new StdoutException("Could not get terminal size", size);
+      throw StdoutException("Could not get terminal size", size);
     }
     return size;
   }
@@ -194,7 +184,7 @@ class Stdout {
   static bool _supportsAnsiEscapes(int fd) {
     var result = _getAnsiSupported(fd);
     if (result is! bool) {
-      throw new StdoutException("Error determining ANSI support", result);
+      throw StdoutException("Error determining ANSI support", result);
     }
     return result;
   }

sdk/lib/_internal/vm/bin/sync_socket_patch.dart

@@ -19,7 +19,7 @@ class _RawSynchronousSocket implements RawSynchronousSocket {
 
   static RawSynchronousSocket connectSync(host, int port) {
     _throwOnBadPort(port);
-    return new _RawSynchronousSocket(
+    return _RawSynchronousSocket(
       _NativeSynchronousSocket.connectSync(host, port),
     );
   }
@@ -65,7 +65,7 @@ base class _NativeSynchronousSocket
 
   static _NativeSynchronousSocket connectSync(host, int port) {
     if (host == null) {
-      throw new ArgumentError("Parameter host cannot be null");
+      throw ArgumentError("Parameter host cannot be null");
     }
     late List<_InternetAddress> addresses;
     var error = null;
@@ -89,7 +89,7 @@ base class _NativeSynchronousSocket
         throw error;
       }
       var address = it.current;
-      var socket = new _NativeSynchronousSocket();
+      var socket = _NativeSynchronousSocket();
       socket.localAddress = address;
       var result = socket._nativeCreateConnectSync(address._in_addr, port);
       if (result is OSError) {
@@ -178,14 +178,14 @@ base class _NativeSynchronousSocket
     int? port,
   ]) {
     if (error is OSError) {
-      return new SocketException(
+      return SocketException(
         message,
         osError: error,
         address: address,
         port: port,
       );
     } else {
-      return new SocketException(message, address: address, port: port);
+      return SocketException(message, address: address, port: port);
     }
   }
 
@@ -199,7 +199,7 @@ base class _NativeSynchronousSocket
     }
     return <_InternetAddress>[
       for (int i = 0; i < response.length; ++i)
-        new _InternetAddress(
+        _InternetAddress(
           InternetAddressType._from(response[i][0]),
           response[i][1],
           host,
@@ -214,7 +214,7 @@ base class _NativeSynchronousSocket
     ArgumentError.checkNotNull(start, "start");
     _checkAvailable();
     if (isClosedRead) {
-      throw new SocketException("Socket is closed for reading");
+      throw SocketException("Socket is closed for reading");
     }
     end = RangeError.checkValidRange(start, end, buffer.length);
     if (end == start) {
@@ -222,7 +222,7 @@ base class _NativeSynchronousSocket
     }
     var result = _nativeReadInto(buffer, start, end - start);
     if (result is OSError) {
-      throw new SocketException("readIntoSync failed", osError: result);
+      throw SocketException("readIntoSync failed", osError: result);
     }
     return result;
   }
@@ -230,11 +230,11 @@ base class _NativeSynchronousSocket
   List<int>? readSync(int len) {
     _checkAvailable();
     if (isClosedRead) {
-      throw new SocketException("Socket is closed for reading");
+      throw SocketException("Socket is closed for reading");
     }
 
     if ((len != null) && (len < 0)) {
-      throw new ArgumentError("Illegal length $len");
+      throw ArgumentError("Illegal length $len");
     }
     if (len == 0) {
       return null;
@@ -261,7 +261,7 @@ base class _NativeSynchronousSocket
         closeSync();
         break;
       default:
-        throw new ArgumentError(direction);
+        throw ArgumentError(direction);
     }
   }
 
@@ -295,7 +295,7 @@ base class _NativeSynchronousSocket
     ArgumentError.checkNotNull(start, "start");
     _checkAvailable();
     if (isClosedWrite) {
-      throw new SocketException("Socket is closed for writing");
+      throw SocketException("Socket is closed for writing");
     }
     end = RangeError.checkValidRange(start, end, buffer.length);
     if (end == start) {
@@ -312,7 +312,7 @@ base class _NativeSynchronousSocket
       end - (start - bufferAndStart.start),
     );
     if (result is OSError) {
-      throw new SocketException("writeFromSync failed", osError: result);
+      throw SocketException("writeFromSync failed", osError: result);
     }
   }
 

sdk/lib/_internal/vm/bin/vmservice_io.dart

@@ -13,65 +13,65 @@ part 'resident_compiler_utils.dart';
 part 'vmservice_server.dart';
 
 // The TCP ip/port that dds listens on.
-@pragma('vm:entry-point', !const bool.fromEnvironment('dart.vm.product'))
+@pragma('vm:entry-point', !bool.fromEnvironment('dart.vm.product'))
 int _ddsPort = 0;
 
-@pragma('vm:entry-point', !const bool.fromEnvironment('dart.vm.product'))
+@pragma('vm:entry-point', !bool.fromEnvironment('dart.vm.product'))
 String _ddsIP = '';
 
 // The TCP ip/port that the HTTP server listens on.
-@pragma('vm:entry-point', !const bool.fromEnvironment('dart.vm.product'))
+@pragma('vm:entry-point', !bool.fromEnvironment('dart.vm.product'))
 int _port = 0;
 
-@pragma('vm:entry-point', !const bool.fromEnvironment('dart.vm.product'))
+@pragma('vm:entry-point', !bool.fromEnvironment('dart.vm.product'))
 String _ip = '';
 
 // Should the HTTP server auto start?
-@pragma('vm:entry-point', !const bool.fromEnvironment('dart.vm.product'))
+@pragma('vm:entry-point', !bool.fromEnvironment('dart.vm.product'))
 bool _autoStart = false;
 
 // Should the HTTP server require an auth code?
-@pragma('vm:entry-point', !const bool.fromEnvironment('dart.vm.product'))
+@pragma('vm:entry-point', !bool.fromEnvironment('dart.vm.product'))
 bool _authCodesDisabled = false;
 
 // Should the HTTP server run in devmode?
-@pragma('vm:entry-point', !const bool.fromEnvironment('dart.vm.product'))
+@pragma('vm:entry-point', !bool.fromEnvironment('dart.vm.product'))
 bool _originCheckDisabled = false;
 
 // Location of file to output VM service connection info.
-@pragma('vm:entry-point', !const bool.fromEnvironment('dart.vm.product'))
+@pragma('vm:entry-point', !bool.fromEnvironment('dart.vm.product'))
 String? _serviceInfoFilename;
 
-@pragma('vm:entry-point', !const bool.fromEnvironment('dart.vm.product'))
+@pragma('vm:entry-point', !bool.fromEnvironment('dart.vm.product'))
 bool _isWindows = false;
 
-@pragma('vm:entry-point', !const bool.fromEnvironment('dart.vm.product'))
+@pragma('vm:entry-point', !bool.fromEnvironment('dart.vm.product'))
 bool _isFuchsia = false;
 
-@pragma('vm:entry-point', !const bool.fromEnvironment('dart.vm.product'))
+@pragma('vm:entry-point', !bool.fromEnvironment('dart.vm.product'))
 Stream<ProcessSignal> Function(ProcessSignal signal)? _signalWatch;
 
-@pragma('vm:entry-point', !const bool.fromEnvironment('dart.vm.product'))
+@pragma('vm:entry-point', !bool.fromEnvironment('dart.vm.product'))
 StreamSubscription<ProcessSignal>? _signalSubscription;
 
-@pragma('vm:entry-point', !const bool.fromEnvironment('dart.vm.product'))
+@pragma('vm:entry-point', !bool.fromEnvironment('dart.vm.product'))
 bool _serveDevtools = true;
 
-@pragma('vm:entry-point', !const bool.fromEnvironment('dart.vm.product'))
+@pragma('vm:entry-point', !bool.fromEnvironment('dart.vm.product'))
 bool _enableServicePortFallback = false;
 
-@pragma('vm:entry-point', !const bool.fromEnvironment('dart.vm.product'))
+@pragma('vm:entry-point', !bool.fromEnvironment('dart.vm.product'))
 bool _waitForDdsToAdvertiseService = false;
 
-@pragma('vm:entry-point', !const bool.fromEnvironment('dart.vm.product'))
+@pragma('vm:entry-point', !bool.fromEnvironment('dart.vm.product'))
 bool _serveObservatory = false;
 
-@pragma('vm:entry-point', !const bool.fromEnvironment('dart.vm.product'))
+@pragma('vm:entry-point', !bool.fromEnvironment('dart.vm.product'))
 bool _printDtd = false;
 
 File? _residentCompilerInfoFile = null;
 
-@pragma('vm:entry-point', !const bool.fromEnvironment('dart.vm.product'))
+@pragma('vm:entry-point', !bool.fromEnvironment('dart.vm.product'))
 void _populateResidentCompilerInfoFile(
   /// If either `--resident-compiler-info-file` or `--resident-server-info-file`
   /// was supplied on the command line, the CLI argument should be forwarded as
@@ -270,7 +270,7 @@ void _registerSignalHandler() {
   ).listen((_) => _toggleWebServer());
 }
 
-@pragma('vm:entry-point', !const bool.fromEnvironment('dart.vm.product'))
+@pragma('vm:entry-point', !bool.fromEnvironment('dart.vm.product'))
 void main() {
   // Set embedder hooks.
   VMServiceEmbedderHooks.cleanup = cleanupCallback;

sdk/lib/_internal/vm/lib/array.dart

@@ -19,7 +19,7 @@ abstract class _Array<E> extends FixedLengthListBase<E> {
   @pragma("vm:prefer-inline")
   _List _slice(int start, int count, bool needsTypeArgument) {
     if (count <= 64) {
-      final result = needsTypeArgument ? new _List<E>(count) : new _List(count);
+      final result = needsTypeArgument ? _List<E>(count) : _List(count);
       for (int i = 0; i < result.length; i++) {
         result[i] = this[start + i];
       }
@@ -44,7 +44,7 @@ abstract class _Array<E> extends FixedLengthListBase<E> {
 
   @pragma("vm:prefer-inline")
   Iterator<E> get iterator {
-    return new _ArrayIterator<E>(this);
+    return _ArrayIterator<E>(this);
   }
 
   E get first {
@@ -68,12 +68,12 @@ abstract class _Array<E> extends FixedLengthListBase<E> {
     if (length > 0) {
       _List result = _slice(0, length, !growable);
       if (growable) {
-        return new _GrowableList<E>._withData(result).._setLength(length);
+        return _GrowableList<E>._withData(result).._setLength(length);
       }
       return unsafeCast<_List<E>>(result);
     }
     // _GrowableList._withData must not be called with empty list.
-    return growable ? <E>[] : new _List<E>(0);
+    return growable ? <E>[] : _List<E>(0);
   }
 }
 
@@ -195,10 +195,10 @@ class _List<E> extends _Array<E> {
   // List interface.
   void setRange(int start, int end, Iterable<E> iterable, [int skipCount = 0]) {
     if (start < 0 || start > this.length) {
-      throw new RangeError.range(start, 0, this.length);
+      throw RangeError.range(start, 0, this.length);
     }
     if (end < start || end > this.length) {
-      throw new RangeError.range(end, start, this.length);
+      throw RangeError.range(end, start, this.length);
     }
     int length = end - start;
     if (length == 0) return;
@@ -224,7 +224,7 @@ class _List<E> extends _Array<E> {
 
   void setAll(int index, Iterable<E> iterable) {
     if (index < 0 || index > this.length) {
-      throw new RangeError.range(index, 0, this.length, "index");
+      throw RangeError.range(index, 0, this.length, "index");
     }
     List<E> iterableAsList;
     if (identical(this, iterable)) {
@@ -241,7 +241,7 @@ class _List<E> extends _Array<E> {
     }
     int length = iterableAsList.length;
     if (index + length > this.length) {
-      throw new RangeError.range(index + length, 0, this.length);
+      throw RangeError.range(index + length, 0, this.length);
     }
     Lists.copy(iterableAsList, 0, this, index, length);
   }
@@ -251,7 +251,7 @@ class _List<E> extends _Array<E> {
     final int actualEnd = RangeError.checkValidRange(start, end, listLength);
     int length = actualEnd - start;
     if (length == 0) return <E>[];
-    var result = new _GrowableList<E>._withData(_slice(start, length, false));
+    var result = _GrowableList<E>._withData(_slice(start, length, false));
     result._setLength(length);
     return result;
   }
@@ -261,9 +261,7 @@ class _List<E> extends _Array<E> {
 @pragma("vm:entry-point")
 class _ImmutableList<E> extends _Array<E> with UnmodifiableListMixin<E> {
   factory _ImmutableList._uninstantiable() {
-    throw new UnsupportedError(
-      "ImmutableArray can only be allocated by the VM",
-    );
+    throw UnsupportedError("ImmutableArray can only be allocated by the VM");
   }
 
   @pragma("vm:external-name", "ImmutableList_from")

sdk/lib/_internal/vm/lib/async_patch.dart

@@ -141,7 +141,7 @@ class _AsyncStarStreamController<T> {
     controller.close();
   }
 
-  _AsyncStarStreamController() : controller = new StreamController(sync: true) {
+  _AsyncStarStreamController() : controller = StreamController(sync: true) {
     controller.onListen = this.onListen;
     controller.onResume = this.onResume;
     controller.onCancel = this.onCancel;
@@ -164,7 +164,7 @@ class _AsyncStarStreamController<T> {
       return null;
     }
     if (cancellationFuture == null) {
-      cancellationFuture = new _Future();
+      cancellationFuture = _Future();
       // Only resume the generator if it is suspended at a yield.
       // Cancellation does not affect an async generator that is
       // suspended at an await.

sdk/lib/_internal/vm/lib/convert_patch.dart

@@ -28,8 +28,8 @@ dynamic _parseJson(
   String source,
   Object? Function(Object? key, Object? value)? reviver,
 ) {
-  _JsonListener listener = new _JsonListener(reviver);
-  var parser = new _JsonStringParser(listener);
+  _JsonListener listener = _JsonListener(reviver);
+  var parser = _JsonStringParser(listener);
   parser.chunk = source;
   parser.chunkEnd = source.length;
   parser.parse(0);
@@ -42,7 +42,7 @@ class Utf8Decoder {
   @patch
   Converter<List<int>, T> fuse<T>(Converter<String, T> next) {
     if (next is JsonDecoder) {
-      return new _JsonUtf8Decoder(
+      return _JsonUtf8Decoder(
             (next as JsonDecoder)._reviver,
             this._allowMalformed,
           )
@@ -66,7 +66,7 @@ class _JsonUtf8Decoder extends Converter<List<int>, Object?> {
   }
 
   ByteConversionSink startChunkedConversion(Sink<Object?> sink) {
-    return new _JsonUtf8DecoderSink(_reviver, sink, _allowMalformed);
+    return _JsonUtf8DecoderSink(_reviver, sink, _allowMalformed);
   }
 }
 
@@ -206,7 +206,7 @@ class _NumberBuffer {
   Uint8List list;
   int length = 0;
   _NumberBuffer(int initialCapacity)
-    : list = new Uint8List(_initialCapacity(initialCapacity));
+    : list = Uint8List(_initialCapacity(initialCapacity));
 
   int get capacity => list.length;
 
@@ -229,13 +229,13 @@ class _NumberBuffer {
   void ensureCapacity(int newCapacity) {
     Uint8List list = this.list;
     if (newCapacity <= list.length) return;
-    Uint8List newList = new Uint8List(newCapacity);
+    Uint8List newList = Uint8List(newCapacity);
     newList.setRange(0, list.length, list, 0);
     this.list = newList;
   }
 
   String getString() {
-    String result = new String.fromCharCodes(list, 0, length);
+    String result = String.fromCharCodes(list, 0, length);
     return result;
   }
 
@@ -1251,7 +1251,7 @@ mixin _ChunkedJsonParser<T> on _JsonParserWithListener {
   int beginChunkNumber(int state, int start) {
     int end = chunkEnd;
     int length = end - start;
-    var buffer = new _NumberBuffer(length);
+    var buffer = _NumberBuffer(length);
     copyCharsToList(start, end, buffer.list, 0);
     buffer.length = length;
     this.buffer = buffer;
@@ -1460,7 +1460,7 @@ mixin _ChunkedJsonParser<T> on _JsonParserWithListener {
       message = "Unexpected character";
       if (position == chunkEnd) message = "Unexpected end of input";
     }
-    throw new FormatException(message, chunk, position);
+    throw FormatException(message, chunk, position);
   }
 }
 
@@ -1486,7 +1486,7 @@ class _JsonStringParser extends _JsonParserWithListener
   }
 
   void beginString() {
-    this.buffer = new StringBuffer();
+    this.buffer = StringBuffer();
   }
 
   void addSliceToString(int start, int end) {
@@ -1521,7 +1521,7 @@ class _JsonStringParser extends _JsonParserWithListener
 class JsonDecoder {
   @patch
   StringConversionSink startChunkedConversion(Sink<Object?> sink) {
-    return new _JsonStringDecoderSink(this._reviver, sink);
+    return _JsonStringDecoderSink(this._reviver, sink);
   }
 }
 
@@ -1542,7 +1542,7 @@ class _JsonStringDecoderSink extends StringConversionSinkBase {
   static _JsonStringParser _createParser(
     Object? Function(Object? key, Object? value)? reviver,
   ) {
-    return new _JsonStringParser(new _JsonListener(reviver));
+    return _JsonStringParser(_JsonListener(reviver));
   }
 
   void addSlice(String chunk, int start, int end, bool isLast) {
@@ -1564,7 +1564,7 @@ class _JsonStringDecoderSink extends StringConversionSinkBase {
   }
 
   ByteConversionSink asUtf8Sink(bool allowMalformed) {
-    return new _JsonUtf8DecoderSink(_reviver, _sink, allowMalformed);
+    return _JsonUtf8DecoderSink(_reviver, _sink, allowMalformed);
   }
 }
 
@@ -1580,7 +1580,7 @@ class _JsonUtf8Parser extends _JsonParserWithListener
   int chunkEnd = 0;
 
   _JsonUtf8Parser(_JsonListener listener, bool allowMalformed)
-    : decoder = new _Utf8Decoder(allowMalformed),
+    : decoder = _Utf8Decoder(allowMalformed),
       super(listener) {
     // Starts out checking for an optional BOM (KWD_BOM, count = 0).
     partialState =
@@ -1621,7 +1621,7 @@ class _JsonUtf8Parser extends _JsonParserWithListener
 
   void beginString() {
     decoder.reset();
-    this.buffer = new StringBuffer();
+    this.buffer = StringBuffer();
   }
 
   void addSliceToString(int start, int end) {
@@ -1671,7 +1671,7 @@ class _JsonUtf8DecoderSink extends ByteConversionSink {
     Object? Function(Object? key, Object? value)? reviver,
     bool allowMalformed,
   ) {
-    return new _JsonUtf8Parser(new _JsonListener(reviver), allowMalformed);
+    return _JsonUtf8Parser(_JsonListener(reviver), allowMalformed);
   }
 
   void addSlice(List<int> chunk, int start, int end, bool isLast) {

sdk/lib/_internal/vm/lib/developer.dart

@@ -38,11 +38,11 @@ void log(
   StackTrace? stackTrace,
 }) {
   if (message is! String) {
-    throw new ArgumentError.value(message, "message", "Must be a String");
+    throw ArgumentError.value(message, "message", "Must be a String");
   }
-  time ??= new DateTime.now();
+  time ??= DateTime.now();
   if (time is! DateTime) {
-    throw new ArgumentError.value(time, "time", "Must be a DateTime");
+    throw ArgumentError.value(time, "time", "Must be a DateTime");
   }
   if (sequenceNumber == null) {
     sequenceNumber = _nextSequenceNumber++;
@@ -92,7 +92,7 @@ external ServiceExtensionHandler? _lookupExtension(String method);
 external _registerExtension(String method, ServiceExtensionHandler handler);
 
 // This code is only invoked when there is no other Dart code on the stack.
-@pragma("vm:entry-point", !const bool.fromEnvironment("dart.vm.product"))
+@pragma("vm:entry-point", !bool.fromEnvironment("dart.vm.product"))
 _runExtension(
   ServiceExtensionHandler handler,
   String method,
@@ -111,7 +111,7 @@ _runExtension(
     response = handler(method, parameters);
   } catch (e, st) {
     var errorDetails = (st == null) ? '$e' : '$e\n$st';
-    response = new ServiceExtensionResponse.error(
+    response = ServiceExtensionResponse.error(
       ServiceExtensionResponse.extensionError,
       errorDetails,
     );
@@ -119,7 +119,7 @@ _runExtension(
     return;
   }
   if (response is! Future) {
-    response = new ServiceExtensionResponse.error(
+    response = ServiceExtensionResponse.error(
       ServiceExtensionResponse.extensionError,
       "Extension handler must return a Future",
     );
@@ -130,7 +130,7 @@ _runExtension(
       .catchError((e, st) {
         // Catch any errors eagerly and wrap them in a ServiceExtensionResponse.
         var errorDetails = (st == null) ? '$e' : '$e\n$st';
-        return new ServiceExtensionResponse.error(
+        return ServiceExtensionResponse.error(
           ServiceExtensionResponse.extensionError,
           errorDetails,
         );
@@ -139,7 +139,7 @@ _runExtension(
         // Post the valid response or the wrapped error after verifying that
         // the response is a ServiceExtensionResponse.
         if (response is! ServiceExtensionResponse) {
-          response = new ServiceExtensionResponse.error(
+          response = ServiceExtensionResponse.error(
             ServiceExtensionResponse.extensionError,
             "Extension handler must complete to a ServiceExtensionResponse",
           );
@@ -169,7 +169,7 @@ _postResponse(
     return;
   }
   assert(id != null);
-  StringBuffer sb = new StringBuffer();
+  StringBuffer sb = StringBuffer();
   sb.write('{"jsonrpc":"2.0",');
   if (response.isError()) {
     if (trace_service) {

sdk/lib/_internal/vm/lib/double.dart

@@ -139,29 +139,29 @@ final class _Double implements double {
   }
 
   double _addFromInteger(int other) {
-    return new _Double.fromInteger(other)._add(this);
+    return _Double.fromInteger(other)._add(this);
   }
 
   double _subFromInteger(int other) {
-    return new _Double.fromInteger(other)._sub(this);
+    return _Double.fromInteger(other)._sub(this);
   }
 
   @pragma("vm:recognized", "asm-intrinsic")
   @pragma("vm:exact-result-type", "dart:core#_Double")
   double _mulFromInteger(int other) {
-    return new _Double.fromInteger(other)._mul(this);
+    return _Double.fromInteger(other)._mul(this);
   }
 
   int _truncDivFromInteger(int other) {
-    return (new _Double.fromInteger(other) / this).truncate();
+    return (_Double.fromInteger(other) / this).truncate();
   }
 
   double _moduloFromInteger(int other) {
-    return new _Double.fromInteger(other)._modulo(this);
+    return _Double.fromInteger(other)._modulo(this);
   }
 
   double _remainderFromInteger(int other) {
-    return new _Double.fromInteger(other)._remainder(this);
+    return _Double.fromInteger(other)._remainder(this);
   }
 
   @pragma("vm:external-name", "Double_greaterThanFromInteger")
@@ -223,13 +223,13 @@ final class _Double implements double {
   num clamp(num lowerLimit, num upperLimit) {
     // TODO: Remove these null checks once all code is opted into strong nonnullable mode.
     if (lowerLimit == null) {
-      throw new ArgumentError.notNull("lowerLimit");
+      throw ArgumentError.notNull("lowerLimit");
     }
     if (upperLimit == null) {
-      throw new ArgumentError.notNull("upperLimit");
+      throw ArgumentError.notNull("upperLimit");
     }
     if (lowerLimit.compareTo(upperLimit) > 0) {
-      throw new ArgumentError(lowerLimit);
+      throw ArgumentError(lowerLimit);
     }
     if (lowerLimit.isNaN) return lowerLimit;
     if (this.compareTo(lowerLimit) < 0) return lowerLimit;
@@ -249,7 +249,7 @@ final class _Double implements double {
   static const int CACHE_LENGTH = 1 << (CACHE_SIZE_LOG2 + 1);
   static const int CACHE_MASK = CACHE_LENGTH - 1;
   // Each key (double) followed by its toString result.
-  static final List _cache = new List.filled(CACHE_LENGTH, null);
+  static final List _cache = List.filled(CACHE_LENGTH, null);
   static int _cacheEvictIndex = 0;
 
   @pragma("vm:external-name", "Double_toString")
@@ -280,12 +280,12 @@ final class _Double implements double {
 
     // TODO: Remove these null checks once all code is opted into strong nonnullable mode.
     if (fractionDigits == null) {
-      throw new ArgumentError.notNull("fractionDigits");
+      throw ArgumentError.notNull("fractionDigits");
     }
 
     // Step 2.
     if (fractionDigits < 0 || fractionDigits > 20) {
-      throw new RangeError.range(fractionDigits, 0, 20, "fractionDigits");
+      throw RangeError.range(fractionDigits, 0, 20, "fractionDigits");
     }
 
     // Step 3.
@@ -317,7 +317,7 @@ final class _Double implements double {
     // Step 7.
     if (fractionDigits != null) {
       if (fractionDigits < 0 || fractionDigits > 20) {
-        throw new RangeError.range(fractionDigits, 0, 20, "fractionDigits");
+        throw RangeError.range(fractionDigits, 0, 20, "fractionDigits");
       }
     }
 
@@ -339,7 +339,7 @@ final class _Double implements double {
     // See ECMAScript-262, 15.7.4.7 for details.
 
     if (precision == null) {
-      throw new ArgumentError.notNull("precision");
+      throw ArgumentError.notNull("precision");
     }
     // The EcmaScript specification checks for NaN and Infinity before looking
     // at the fractionDigits. In Dart we are consistent with toStringAsFixed and
@@ -347,7 +347,7 @@ final class _Double implements double {
 
     // Step 8.
     if (precision < 1 || precision > 21) {
-      throw new RangeError.range(precision, 1, 21, "precision");
+      throw RangeError.range(precision, 1, 21, "precision");
     }
 
     if (isNaN) return "NaN";

sdk/lib/_internal/vm/lib/double_patch.dart

@@ -109,7 +109,7 @@ class double {
   static double parse(String source) {
     var result = _parse(source);
     if (result == null) {
-      throw new FormatException("Invalid double", source);
+      throw FormatException("Invalid double", source);
     }
     return result;
   }

sdk/lib/_internal/vm/lib/errors_patch.dart

@@ -141,7 +141,7 @@ class _InternalError {
 @pragma("vm:entry-point")
 class UnsupportedError {
   static Never _throwNew(String msg) {
-    throw new UnsupportedError(msg);
+    throw UnsupportedError(msg);
   }
 }
 
@@ -150,7 +150,7 @@ class UnsupportedError {
 class StateError {
   @pragma("vm:entry-point")
   static Never _throwNew(String msg) {
-    throw new StateError(msg);
+    throw StateError(msg);
   }
 }
 
@@ -168,7 +168,7 @@ class NoSuchMethodError {
   NoSuchMethodError._withInvocation(this._receiver, this._invocation);
 
   static Never _throwNewInvocation(Object? receiver, Invocation invocation) {
-    throw new NoSuchMethodError.withInvocation(receiver, invocation);
+    throw NoSuchMethodError.withInvocation(receiver, invocation);
   }
 
   // The compiler emits a call to _throwNew when it cannot resolve a static
@@ -184,7 +184,7 @@ class NoSuchMethodError {
     List? arguments,
     List? argumentNames,
   ) {
-    throw new NoSuchMethodError._withType(
+    throw NoSuchMethodError._withType(
       receiver,
       memberName,
       invocationType,
@@ -200,11 +200,11 @@ class NoSuchMethodError {
     List arguments,
     List argumentNames,
   ) {
-    Map<Symbol, dynamic> namedArguments = new Map<Symbol, dynamic>();
+    Map<Symbol, dynamic> namedArguments = Map<Symbol, dynamic>();
     int numPositionalArguments = arguments.length - argumentNames.length;
     for (int i = 0; i < argumentNames.length; i++) {
       final argValue = arguments[numPositionalArguments + i];
-      namedArguments[new Symbol(argumentNames[i])] = argValue;
+      namedArguments[Symbol(argumentNames[i])] = argValue;
     }
     return namedArguments;
   }
@@ -222,8 +222,8 @@ class NoSuchMethodError {
     Object? typeArguments,
     List? arguments,
     List? argumentNames,
-  ) : this._invocation = new _InvocationMirror._withType(
-        new Symbol(memberName),
+  ) : this._invocation = _InvocationMirror._withType(
+        Symbol(memberName),
         invocationType,
         _InvocationMirror._unpackTypeArguments(
           typeArguments,
@@ -262,7 +262,7 @@ class NoSuchMethodError {
       StringBuffer? typeArgumentsBuf = null;
       final typeArguments = localInvocation.typeArguments;
       if ((typeArguments != null) && (typeArguments.length > 0)) {
-        final argsBuf = new StringBuffer();
+        final argsBuf = StringBuffer();
         argsBuf.write("<");
         for (int i = 0; i < typeArguments.length; i++) {
           if (i > 0) {
@@ -273,7 +273,7 @@ class NoSuchMethodError {
         argsBuf.write(">");
         typeArgumentsBuf = argsBuf;
       }
-      StringBuffer argumentsBuf = new StringBuffer();
+      StringBuffer argumentsBuf = StringBuffer();
       var positionalArguments = localInvocation.positionalArguments;
       int argumentCount = 0;
       if (positionalArguments != null) {
@@ -320,7 +320,7 @@ class NoSuchMethodError {
             ])[kind];
       }
 
-      StringBuffer msgBuf = new StringBuffer("NoSuchMethodError: ");
+      StringBuffer msgBuf = StringBuffer("NoSuchMethodError: ");
       bool isTypeCall = false;
       switch (level) {
         case _InvocationMirror._DYNAMIC:

sdk/lib/_internal/vm/lib/expando_patch.dart

@@ -20,11 +20,11 @@ class Expando<T extends Object> {
   @patch
   Expando([String? name])
     : name = name,
-      _data = new List<_WeakProperty?>.filled(_minSize, null),
+      _data = List<_WeakProperty?>.filled(_minSize, null),
       _used = 0;
 
   static const _minSize = 8;
-  static final _deletedEntry = new _WeakProperty();
+  static final _deletedEntry = _WeakProperty();
 
   @patch
   T? operator [](Object object) {
@@ -93,7 +93,7 @@ class Expando<T extends Object> {
     }
 
     if (_used < _limit) {
-      var ephemeron = new _WeakProperty();
+      var ephemeron = _WeakProperty();
       ephemeron.key = object;
       ephemeron.value = value;
       _data[idx] = ephemeron;
@@ -130,7 +130,7 @@ class Expando<T extends Object> {
 
     // Reset the mappings to empty so that we can just add the existing
     // valid entries.
-    _data = new List<_WeakProperty?>.filled(new_size, null);
+    _data = List<_WeakProperty?>.filled(new_size, null);
     _used = 0;
 
     for (var i = 0; i < old_data.length; i++) {

sdk/lib/_internal/vm/lib/growable_array.dart

@@ -8,7 +8,7 @@ part of "core_patch.dart";
 class _GrowableList<T> extends ListBase<T> {
   void insert(int index, T element) {
     if ((index < 0) || (index > length)) {
-      throw new RangeError.range(index, 0, length);
+      throw RangeError.range(index, 0, length);
     }
     int oldLength = this.length;
     add(element);
@@ -41,7 +41,7 @@ class _GrowableList<T> extends ListBase<T> {
 
   void insertAll(int index, Iterable<T> iterable) {
     if (index < 0 || index > length) {
-      throw new RangeError.range(index, 0, length);
+      throw RangeError.range(index, 0, length);
     }
     // TODO(floitsch): we can probably detect more cases.
     if (iterable is! List && iterable is! Set && iterable is! SubListIterable) {
@@ -84,11 +84,11 @@ class _GrowableList<T> extends ListBase<T> {
     final int actualEnd = RangeError.checkValidRange(start, end, this.length);
     int length = actualEnd - start;
     if (length == 0) return <T>[];
-    final list = new _List(length);
+    final list = _List(length);
     for (int i = 0; i < length; i++) {
       list[i] = this[start + i];
     }
-    final result = new _GrowableList<T>._withData(list);
+    final result = _GrowableList<T>._withData(list);
     result._setLength(length);
     return result;
   }
@@ -96,7 +96,7 @@ class _GrowableList<T> extends ListBase<T> {
   @pragma('dyn-module:language-impl:callable')
   factory _GrowableList(int length) {
     var data = _allocateData(length);
-    var result = new _GrowableList<T>._withData(data);
+    var result = _GrowableList<T>._withData(data);
     if (length > 0) {
       result._setLength(length);
     }
@@ -105,7 +105,7 @@ class _GrowableList<T> extends ListBase<T> {
 
   factory _GrowableList.withCapacity(int capacity) {
     var data = _allocateData(capacity);
-    return new _GrowableList<T>._withData(data);
+    return _GrowableList<T>._withData(data);
   }
 
   // Specialization of List.empty constructor for growable == true.
@@ -314,7 +314,7 @@ class _GrowableList<T> extends ListBase<T> {
       }
       if (isVMList) {
         if (identical(iterable, this)) {
-          throw new ConcurrentModificationError(this);
+          throw ConcurrentModificationError(this);
         }
         this._setLength(newLen);
         final ListBase<T> iterableAsList = iterable as ListBase<T>;
@@ -332,7 +332,7 @@ class _GrowableList<T> extends ListBase<T> {
         this._setLength(newLen);
         this[len] = it.current;
         if (!it.moveNext()) return;
-        if (this.length != newLen) throw new ConcurrentModificationError(this);
+        if (this.length != newLen) throw ConcurrentModificationError(this);
         len = newLen;
       }
       _growToNextCapacity();
@@ -364,7 +364,7 @@ class _GrowableList<T> extends ListBase<T> {
   }
 
   // Shared array used as backing for new empty growable arrays.
-  static final _List _emptyList = new _List(0);
+  static final _List _emptyList = _List(0);
 
   static _List _allocateData(int capacity) {
     if (capacity == 0) {
@@ -423,7 +423,7 @@ class _GrowableList<T> extends ListBase<T> {
     int initialLength = length;
     for (int i = 0; i < length; i++) {
       f(this[i]);
-      if (length != initialLength) throw new ConcurrentModificationError(this);
+      if (length != initialLength) throw ConcurrentModificationError(this);
     }
   }
 
@@ -458,7 +458,7 @@ class _GrowableList<T> extends ListBase<T> {
       }
 
       // Not all elements are strings, so allocate a new backing array.
-      final list = new _List(length);
+      final list = _List(length);
       for (int copyIndex = 0; copyIndex < i; copyIndex++) {
         list[copyIndex] = this[copyIndex];
       }
@@ -485,7 +485,7 @@ class _GrowableList<T> extends ListBase<T> {
   }
 
   String _joinWithSeparator(String separator) {
-    StringBuffer buffer = new StringBuffer();
+    StringBuffer buffer = StringBuffer();
     buffer.write(this[0]);
     for (int i = 1; i < this.length; i++) {
       buffer.write(separator);
@@ -512,7 +512,7 @@ class _GrowableList<T> extends ListBase<T> {
 
   @pragma("vm:prefer-inline")
   Iterator<T> get iterator {
-    return new ListIterator<T>(this);
+    return ListIterator<T>(this);
   }
 
   List<T> toList({bool growable = true}) {
@@ -527,18 +527,18 @@ class _GrowableList<T> extends ListBase<T> {
     final length = this.length;
     if (growable) {
       if (length > 0) {
-        final data = new _List(_adjustedCapacity(length));
+        final data = _List(_adjustedCapacity(length));
         for (int i = 0; i < length; i++) {
           data[i] = this[i];
         }
-        final result = new _GrowableList<T>._withData(data);
+        final result = _GrowableList<T>._withData(data);
         result._setLength(length);
         return result;
       }
       return <T>[];
     } else {
       if (length > 0) {
-        final list = new _List<T>(length);
+        final list = _List<T>(length);
         for (int i = 0; i < length; i++) {
           list[i] = this[i];
         }
@@ -549,14 +549,14 @@ class _GrowableList<T> extends ListBase<T> {
   }
 
   Set<T> toSet() {
-    return new Set<T>.of(this);
+    return Set<T>.of(this);
   }
 
   // Factory constructing a mutable List from a parser generated List literal.
   // [elements] contains elements that are already type checked.
   @pragma("vm:entry-point", "call")
   factory _GrowableList._literal(_List elements) {
-    final result = new _GrowableList<T>._withData(elements);
+    final result = _GrowableList<T>._withData(elements);
     result._setLength(elements.length);
     return result;
   }
@@ -567,7 +567,7 @@ class _GrowableList<T> extends ListBase<T> {
   factory _GrowableList._literal1(T e0) {
     _List elements = _List(1);
     elements[0] = e0;
-    final result = new _GrowableList<T>._withData(elements);
+    final result = _GrowableList<T>._withData(elements);
     result._setLength(1);
     return result;
   }
@@ -577,7 +577,7 @@ class _GrowableList<T> extends ListBase<T> {
     _List elements = _List(2);
     elements[0] = e0;
     elements[1] = e1;
-    final result = new _GrowableList<T>._withData(elements);
+    final result = _GrowableList<T>._withData(elements);
     result._setLength(2);
     return result;
   }
@@ -588,7 +588,7 @@ class _GrowableList<T> extends ListBase<T> {
     elements[0] = e0;
     elements[1] = e1;
     elements[2] = e2;
-    final result = new _GrowableList<T>._withData(elements);
+    final result = _GrowableList<T>._withData(elements);
     result._setLength(3);
     return result;
   }
@@ -600,7 +600,7 @@ class _GrowableList<T> extends ListBase<T> {
     elements[1] = e1;
     elements[2] = e2;
     elements[3] = e3;
-    final result = new _GrowableList<T>._withData(elements);
+    final result = _GrowableList<T>._withData(elements);
     result._setLength(4);
     return result;
   }
@@ -613,7 +613,7 @@ class _GrowableList<T> extends ListBase<T> {
     elements[2] = e2;
     elements[3] = e3;
     elements[4] = e4;
-    final result = new _GrowableList<T>._withData(elements);
+    final result = _GrowableList<T>._withData(elements);
     result._setLength(5);
     return result;
   }
@@ -627,7 +627,7 @@ class _GrowableList<T> extends ListBase<T> {
     elements[3] = e3;
     elements[4] = e4;
     elements[5] = e5;
-    final result = new _GrowableList<T>._withData(elements);
+    final result = _GrowableList<T>._withData(elements);
     result._setLength(6);
     return result;
   }
@@ -642,7 +642,7 @@ class _GrowableList<T> extends ListBase<T> {
     elements[4] = e4;
     elements[5] = e5;
     elements[6] = e6;
-    final result = new _GrowableList<T>._withData(elements);
+    final result = _GrowableList<T>._withData(elements);
     result._setLength(7);
     return result;
   }
@@ -667,7 +667,7 @@ class _GrowableList<T> extends ListBase<T> {
     elements[5] = e5;
     elements[6] = e6;
     elements[7] = e7;
-    final result = new _GrowableList<T>._withData(elements);
+    final result = _GrowableList<T>._withData(elements);
     result._setLength(8);
     return result;
   }

sdk/lib/_internal/vm/lib/integers.dart

@@ -264,10 +264,10 @@ abstract final class _IntegerImplementation implements int {
   num clamp(num lowerLimit, num upperLimit) {
     // TODO: Remove these null checks once all code is opted into strong nonnullable mode.
     if (lowerLimit == null) {
-      throw new ArgumentError.notNull("lowerLimit");
+      throw ArgumentError.notNull("lowerLimit");
     }
     if (upperLimit == null) {
-      throw new ArgumentError.notNull("upperLimit");
+      throw ArgumentError.notNull("upperLimit");
     }
     // Special case for integers.
     if (lowerLimit is int && upperLimit is int && lowerLimit <= upperLimit) {
@@ -277,7 +277,7 @@ abstract final class _IntegerImplementation implements int {
     }
     // Generic case involving doubles, and invalid integer ranges.
     if (lowerLimit.compareTo(upperLimit) > 0) {
-      throw new ArgumentError(lowerLimit);
+      throw ArgumentError(lowerLimit);
     }
     if (lowerLimit.isNaN) return lowerLimit;
     // Note that we don't need to care for -0.0 for the lower limit.
@@ -293,7 +293,7 @@ abstract final class _IntegerImplementation implements int {
   @pragma("vm:recognized", "other")
   @pragma("vm:exact-result-type", _Double)
   double toDouble() {
-    return new _Double.fromInteger(this);
+    return _Double.fromInteger(this);
   }
 
   String toStringAsFixed(int fractionDigits) {
@@ -312,7 +312,7 @@ abstract final class _IntegerImplementation implements int {
 
   String toRadixString(int radix) {
     if (radix < 2 || 36 < radix) {
-      throw new RangeError.range(radix, 2, 36, "radix");
+      throw RangeError.range(radix, 2, 36, "radix");
     }
     if (radix & (radix - 1) == 0) {
       return _toPow2String(radix);
@@ -395,13 +395,13 @@ abstract final class _IntegerImplementation implements int {
   int modPow(int e, int m) {
     // TODO: Remove these null checks once all code is opted into strong nonnullable mode.
     if (e == null) {
-      throw new ArgumentError.notNull("exponent");
+      throw ArgumentError.notNull("exponent");
     }
     if (m == null) {
-      throw new ArgumentError.notNull("modulus");
+      throw ArgumentError.notNull("modulus");
     }
-    if (e < 0) throw new RangeError.range(e, 0, null, "exponent");
-    if (m <= 0) throw new RangeError.range(m, 1, null, "modulus");
+    if (e < 0) throw RangeError.range(e, 0, null, "exponent");
+    if (m <= 0) throw RangeError.range(m, 1, null, "modulus");
     if (e == 0) return 1;
 
     // This is floor(sqrt(2^63)).
@@ -486,7 +486,7 @@ abstract final class _IntegerImplementation implements int {
     } while (u != 0);
     if (!inv) return v << s;
     if (v != 1) {
-      throw new Exception("Not coprime");
+      throw Exception("Not coprime");
     }
     if (d < 0) {
       d += x;
@@ -502,15 +502,15 @@ abstract final class _IntegerImplementation implements int {
   int modInverse(int m) {
     // TODO: Remove these null checks once all code is opted into strong nonnullable mode.
     if (m == null) {
-      throw new ArgumentError.notNull("modulus");
+      throw ArgumentError.notNull("modulus");
     }
-    if (m <= 0) throw new RangeError.range(m, 1, null, "modulus");
+    if (m <= 0) throw RangeError.range(m, 1, null, "modulus");
     if (m == 1) return 0;
     int t = this;
     if ((t < 0) || (t >= m)) t %= m;
     if (t == 1) return 1;
     if ((t == 0) || (t.isEven && m.isEven)) {
-      throw new Exception("Not coprime");
+      throw Exception("Not coprime");
     }
     return _binaryGcd(m, t, true);
   }
@@ -519,7 +519,7 @@ abstract final class _IntegerImplementation implements int {
   int gcd(int other) {
     // TODO: Remove these null checks once all code is opted into strong nonnullable mode.
     if (other == null) {
-      throw new ArgumentError.notNull("other");
+      throw ArgumentError.notNull("other");
     }
     int x = this.abs();
     int y = other.abs();
@@ -558,7 +558,7 @@ final class _Smi extends _IntegerImplementation {
    * Get the digits of `n`, with `0 <= n < 100`, as
    * `_digitTable[n * 2]` and `_digitTable[n * 2 + 1]`.
    */
-  static const _digitTable = const [
+  static const _digitTable = [
     0x30, 0x30, 0x30, 0x31, 0x30, 0x32, 0x30, 0x33, //
     0x30, 0x34, 0x30, 0x35, 0x30, 0x36, 0x30, 0x37, //
     0x30, 0x38, 0x30, 0x39, 0x31, 0x30, 0x31, 0x31, //
@@ -589,7 +589,7 @@ final class _Smi extends _IntegerImplementation {
   /**
    * Result of int.toString for -99, -98, ..., 98, 99.
    */
-  static const _smallLookupTable = const [
+  static const _smallLookupTable = [
     "-99", "-98", "-97", "-96", "-95", "-94", "-93", "-92", "-91", "-90", //
     "-89", "-88", "-87", "-86", "-85", "-84", "-83", "-82", "-81", "-80", //
     "-79", "-78", "-77", "-76", "-75", "-74", "-73", "-72", "-71", "-70", //

sdk/lib/_internal/vm/lib/internal_patch.dart

@@ -206,22 +206,22 @@ bool isSentinel(dynamic value) => throw UnsupportedError('isSentinel');
 class LateError {
   @pragma("vm:entry-point")
   static Never _throwFieldAlreadyInitialized(String fieldName) {
-    throw new LateError.fieldAI(fieldName);
+    throw LateError.fieldAI(fieldName);
   }
 
   @pragma("vm:entry-point")
   static Never _throwLocalNotInitialized(String localName) {
-    throw new LateError.localNI(localName);
+    throw LateError.localNI(localName);
   }
 
   @pragma("vm:entry-point")
   static Never _throwLocalAlreadyInitialized(String localName) {
-    throw new LateError.localAI(localName);
+    throw LateError.localAI(localName);
   }
 
   @pragma("vm:entry-point")
   static Never _throwLocalAssignedDuringInitialization(String localName) {
-    throw new LateError.localADI(localName);
+    throw LateError.localADI(localName);
   }
 }
 
@@ -234,7 +234,7 @@ void checkValidWeakTarget(object, name) {
       (object is Pointer) ||
       (object is Struct) ||
       (object is Union)) {
-    throw new ArgumentError.value(
+    throw ArgumentError.value(
       object,
       name,
       "Cannot be a string, number, boolean, record, null, Pointer, Struct or Union",

sdk/lib/_internal/vm/lib/invocation_mirror_patch.dart

@@ -73,16 +73,14 @@ class _InvocationMirror implements Invocation {
     }
     if (funcName.startsWith("get:")) {
       _type |= _GETTER;
-      _memberName = new internal.Symbol.unvalidated(funcName.substring(4));
+      _memberName = internal.Symbol.unvalidated(funcName.substring(4));
     } else if (funcName.startsWith("set:")) {
       _type |= _SETTER;
-      _memberName = new internal.Symbol.unvalidated(
-        funcName.substring(4) + "=",
-      );
+      _memberName = internal.Symbol.unvalidated(funcName.substring(4) + "=");
     } else {
       _type |=
           _isSuperInvocation ? (_SUPER << _LEVEL_SHIFT) | _METHOD : _METHOD;
-      _memberName = new internal.Symbol.unvalidated(funcName);
+      _memberName = internal.Symbol.unvalidated(funcName);
     }
   }
 
@@ -130,7 +128,7 @@ class _InvocationMirror implements Invocation {
       // Exclude receiver and type args in the returned list.
       var receiverIndex = _typeArgsLen > 0 ? 1 : 0;
       var args = _arguments!;
-      _positionalArguments = new _ImmutableList._from(
+      _positionalArguments = _ImmutableList._from(
         args,
         receiverIndex + 1,
         numPositionalArguments,
@@ -151,15 +149,15 @@ class _InvocationMirror implements Invocation {
         return _namedArguments = const {};
       }
       var receiverIndex = _typeArgsLen > 0 ? 1 : 0;
-      final namedArguments = new Map<Symbol, Object?>();
+      final namedArguments = Map<Symbol, Object?>();
       for (var i = 0; i < numNamedArguments; i++) {
         var namedEntryIndex = _FIRST_NAMED_ENTRY + 2 * i;
         var pos = argsDescriptor[namedEntryIndex + 1] as int;
         var arg_name = argsDescriptor[namedEntryIndex] as String;
         var arg_value = _arguments![receiverIndex + pos];
-        namedArguments[new internal.Symbol.unvalidated(arg_name)] = arg_value;
+        namedArguments[internal.Symbol.unvalidated(arg_name)] = arg_value;
       }
-      _namedArguments = new Map.unmodifiable(namedArguments);
+      _namedArguments = Map.unmodifiable(namedArguments);
     }
     return _namedArguments!;
   }
@@ -218,7 +216,7 @@ class _InvocationMirror implements Invocation {
     bool isSuperInvocation, [
     int type = _UNINITIALIZED,
   ]) {
-    return new _InvocationMirror(
+    return _InvocationMirror(
       functionName,
       argumentsDescriptor,
       arguments,
@@ -240,7 +238,7 @@ class _InvocationMirror implements Invocation {
     int? type,
     int delayedTypeArgumentsLen,
   ) {
-    return new _InvocationMirror(
+    return _InvocationMirror(
       functionName,
       argumentsDescriptor,
       arguments,

sdk/lib/_internal/vm/lib/isolate_patch.dart

@@ -16,12 +16,11 @@ part "timer_impl.dart";
 @patch
 class ReceivePort {
   @patch
-  factory ReceivePort([String debugName = '']) =>
-      new _ReceivePortImpl(debugName);
+  factory ReceivePort([String debugName = '']) => _ReceivePortImpl(debugName);
 
   @patch
   factory ReceivePort.fromRawReceivePort(RawReceivePort rawPort) {
-    return new _ReceivePortImpl.fromRawReceivePort(rawPort);
+    return _ReceivePortImpl.fromRawReceivePort(rawPort);
   }
 }
 
@@ -29,7 +28,7 @@ class ReceivePort {
 @pragma("vm:entry-point")
 class Capability {
   @patch
-  factory Capability() => new _Capability();
+  factory Capability() => _Capability();
 }
 
 @pragma("vm:entry-point")
@@ -62,7 +61,7 @@ class RawReceivePort {
    */
   @patch
   factory RawReceivePort([Function? handler, String debugName = '']) {
-    _RawReceivePort result = new _RawReceivePort(debugName);
+    _RawReceivePort result = _RawReceivePort(debugName);
     result.handler = handler;
     return result;
   }
@@ -70,10 +69,10 @@ class RawReceivePort {
 
 final class _ReceivePortImpl extends Stream implements ReceivePort {
   _ReceivePortImpl([String debugName = ''])
-    : this.fromRawReceivePort(new RawReceivePort(null, debugName));
+    : this.fromRawReceivePort(RawReceivePort(null, debugName));
 
   _ReceivePortImpl.fromRawReceivePort(this._rawPort)
-    : _controller = new StreamController(sync: true) {
+    : _controller = StreamController(sync: true) {
     _controller.onCancel = close;
     _rawPort.handler = _controller.add;
   }
@@ -341,7 +340,7 @@ final class Isolate {
   static Uri? get packageConfigSync {
     var hook = VMLibraryHooks.packageConfigUriSync;
     if (hook == null) {
-      throw new UnsupportedError("Isolate.packageConfig");
+      throw UnsupportedError("Isolate.packageConfig");
     }
     return hook();
   }
@@ -355,7 +354,7 @@ final class Isolate {
   static Uri? resolvePackageUriSync(Uri packageUri) {
     var hook = VMLibraryHooks.resolvePackageUriSync;
     if (hook == null) {
-      throw new UnsupportedError("Isolate.resolvePackageUriSync");
+      throw UnsupportedError("Isolate.resolvePackageUriSync");
     }
     return hook(packageUri);
   }
@@ -383,7 +382,7 @@ final class Isolate {
     if (script == null) {
       // We do not have enough information to support spawning the new
       // isolate.
-      throw new UnsupportedError("Isolate.spawn");
+      throw UnsupportedError("Isolate.spawn");
     }
     if (script.isScheme("package")) {
       if (Isolate._packageSupported()) {
@@ -393,7 +392,7 @@ final class Isolate {
       }
     }
 
-    final RawReceivePort readyPort = new RawReceivePort(
+    final RawReceivePort readyPort = RawReceivePort(
       null,
       'Isolate.spawn ready',
     );
@@ -413,7 +412,7 @@ final class Isolate {
       return await _spawnCommon(readyPort);
     } catch (e, st) {
       readyPort.close();
-      return await new Future<Isolate>.error(e, st);
+      return await Future<Isolate>.error(e, st);
     }
   }
 
@@ -448,20 +447,20 @@ final class Isolate {
     String? debugName,
   }) async {
     if (environment != null) {
-      throw new UnimplementedError("environment");
+      throw UnimplementedError("environment");
     }
 
     // Verify that no mutually exclusive arguments have been passed.
     if (automaticPackageResolution) {
       if (packageRoot != null) {
-        throw new ArgumentError(
+        throw ArgumentError(
           "Cannot simultaneously request "
           "automaticPackageResolution and specify a "
           "packageRoot.",
         );
       }
       if (packageConfig != null) {
-        throw new ArgumentError(
+        throw ArgumentError(
           "Cannot simultaneously request "
           "automaticPackageResolution and specify a "
           "packageConfig.",
@@ -469,7 +468,7 @@ final class Isolate {
       }
     } else {
       if ((packageRoot != null) && (packageConfig != null)) {
-        throw new ArgumentError(
+        throw ArgumentError(
           "Cannot simultaneously specify a "
           "packageRoot and a packageConfig.",
         );
@@ -497,7 +496,7 @@ final class Isolate {
     // The VM will invoke [_startIsolate] and not `main`.
     final packageConfigString = packageConfig?.toString();
 
-    final RawReceivePort readyPort = new RawReceivePort(
+    final RawReceivePort readyPort = RawReceivePort(
       null,
       'Isolate.spawnUri ready',
     );
@@ -526,14 +525,14 @@ final class Isolate {
   }
 
   static Future<Isolate> _spawnCommon(RawReceivePort readyPort) {
-    final completer = new Completer<Isolate>.sync();
+    final completer = Completer<Isolate>.sync();
     readyPort.handler = (readyMessage) {
       readyPort.close();
       if (readyMessage is List && readyMessage.length == 2) {
         SendPort controlPort = readyMessage[0];
         List capabilities = readyMessage[1];
         completer.complete(
-          new Isolate(
+          Isolate(
             controlPort,
             pauseCapability: capabilities[0],
             terminateCapability: capabilities[1],
@@ -542,12 +541,12 @@ final class Isolate {
       } else if (readyMessage is String) {
         // We encountered an error while starting the new isolate.
         completer.completeError(
-          new IsolateSpawnException('Unable to spawn isolate: ${readyMessage}'),
+          IsolateSpawnException('Unable to spawn isolate: ${readyMessage}'),
         );
       } else {
         // This shouldn't happen.
         completer.completeError(
-          new IsolateSpawnException(
+          IsolateSpawnException(
             "Internal error: unexpected format for ready message: "
             "'${readyMessage}'",
           ),
@@ -599,7 +598,7 @@ final class Isolate {
     // _sendOOB expects a fixed length array and hence we create a fixed
     // length array and assign values to it instead of using [ ... ].
     var msg =
-        new List<Object?>.filled(4, null)
+        List<Object?>.filled(4, null)
           ..[0] =
               0 // Make room for OOB message type.
           ..[1] = _PAUSE
@@ -611,7 +610,7 @@ final class Isolate {
   @patch
   void resume(Capability resumeCapability) {
     var msg =
-        new List<Object?>.filled(4, null)
+        List<Object?>.filled(4, null)
           ..[0] =
               0 // Make room for OOB message type.
           ..[1] = _RESUME
@@ -623,7 +622,7 @@ final class Isolate {
   @patch
   void addOnExitListener(SendPort responsePort, {Object? response}) {
     var msg =
-        new List<Object?>.filled(4, null)
+        List<Object?>.filled(4, null)
           ..[0] =
               0 // Make room for OOB message type.
           ..[1] = _ADD_EXIT
@@ -635,7 +634,7 @@ final class Isolate {
   @patch
   void removeOnExitListener(SendPort responsePort) {
     var msg =
-        new List<Object?>.filled(3, null)
+        List<Object?>.filled(3, null)
           ..[0] =
               0 // Make room for OOB message type.
           ..[1] = _DEL_EXIT
@@ -646,7 +645,7 @@ final class Isolate {
   @patch
   void setErrorsFatal(bool errorsAreFatal) {
     var msg =
-        new List<Object?>.filled(4, null)
+        List<Object?>.filled(4, null)
           ..[0] =
               0 // Make room for OOB message type.
           ..[1] = _ERROR_FATAL
@@ -658,7 +657,7 @@ final class Isolate {
   @patch
   void kill({int priority = beforeNextEvent}) {
     var msg =
-        new List<Object?>.filled(4, null)
+        List<Object?>.filled(4, null)
           ..[0] =
               0 // Make room for OOB message type.
           ..[1] = _KILL
@@ -674,7 +673,7 @@ final class Isolate {
     int priority = immediate,
   }) {
     var msg =
-        new List<Object?>.filled(5, null)
+        List<Object?>.filled(5, null)
           ..[0] =
               0 // Make room for OOM message type.
           ..[1] = _PING
@@ -687,7 +686,7 @@ final class Isolate {
   @patch
   void addErrorListener(SendPort port) {
     var msg =
-        new List<Object?>.filled(3, null)
+        List<Object?>.filled(3, null)
           ..[0] =
               0 // Make room for OOB message type.
           ..[1] = _ADD_ERROR
@@ -698,7 +697,7 @@ final class Isolate {
   @patch
   void removeErrorListener(SendPort port) {
     var msg =
-        new List<Object?>.filled(3, null)
+        List<Object?>.filled(3, null)
           ..[0] =
               0 // Make room for OOB message type.
           ..[1] = _DEL_ERROR
@@ -708,7 +707,7 @@ final class Isolate {
 
   static Isolate _getCurrentIsolate() {
     List portAndCapabilities = _getPortAndCapabilitiesOfCurrentIsolate();
-    return new Isolate(
+    return Isolate(
       portAndCapabilities[0],
       pauseCapability: portAndCapabilities[1],
       terminateCapability: portAndCapabilities[2],

sdk/lib/_internal/vm/lib/lib_prefix.dart

@@ -20,7 +20,7 @@ class _LibraryPrefix {
   @pragma("vm:external-name", "LibraryPrefix_issueLoad")
   external static void _issueLoad(Object unit);
 
-  static final _loads = new Map<Object, Completer<void>>();
+  static final _loads = Map<Object, Completer<void>>();
 }
 
 class _DeferredNotLoadedError extends Error implements NoSuchMethodError {
@@ -46,7 +46,7 @@ void _completeLoads(Object unit, String? errorMessage, bool transientError) {
   Completer<void>? load = _LibraryPrefix._loads[unit];
   if (load == null) {
     // Embedder loaded even though prefix.loadLibrary() wasn't called.
-    _LibraryPrefix._loads[unit] = load = new Completer<void>();
+    _LibraryPrefix._loads[unit] = load = Completer<void>();
   }
   if (errorMessage == null) {
     load.complete(null);
@@ -54,7 +54,7 @@ void _completeLoads(Object unit, String? errorMessage, bool transientError) {
     if (transientError) {
       _LibraryPrefix._loads.remove(unit);
     }
-    load.completeError(new DeferredLoadException(errorMessage));
+    load.completeError(DeferredLoadException(errorMessage));
   }
 }
 
@@ -69,7 +69,7 @@ Future<void> _loadLibrary(_LibraryPrefix prefix) async {
     if (unit != 1) {
       Completer<void>? load = _LibraryPrefix._loads[unit];
       if (load == null) {
-        _LibraryPrefix._loads[unit] = load = new Completer<void>();
+        _LibraryPrefix._loads[unit] = load = Completer<void>();
         _LibraryPrefix._issueLoad(unit);
       }
       await load.future;
@@ -78,7 +78,7 @@ Future<void> _loadLibrary(_LibraryPrefix prefix) async {
   // Ensure the prefix's future does not complete until the next Turn even
   // when loading is a no-op or synchronous. Helps applications avoid writing
   // code that only works when loading isn't really deferred.
-  await new Future<void>(() {
+  await Future<void>(() {
     prefix._setLoaded();
   });
 }
@@ -87,6 +87,6 @@ Future<void> _loadLibrary(_LibraryPrefix prefix) async {
 @pragma("vm:never-inline") // Don't duplicate prefix checking code.
 void _checkLoaded(_LibraryPrefix prefix) {
   if (!prefix._isLoaded()) {
-    throw new _DeferredNotLoadedError(prefix);
+    throw _DeferredNotLoadedError(prefix);
   }
 }

sdk/lib/_internal/vm/lib/math_patch.dart

@@ -178,7 +178,7 @@ class Random {
   factory Random([int? seed]) {
     var state = _Random._setupSeed((seed == null) ? _Random._nextSeed() : seed);
     // Crank a couple of times to distribute the seed bits a bit further.
-    return new _Random._withState(state)
+    return _Random._withState(state)
       .._nextState()
       .._nextState()
       .._nextState()
@@ -207,7 +207,7 @@ class _Random implements Random {
   int nextInt(int max) {
     const limit = 0x3FFFFFFF;
     if ((max <= 0) || ((max > limit) && (max > _POW2_32))) {
-      throw new RangeError.range(
+      throw RangeError.range(
         max,
         1,
         _POW2_32,
@@ -245,7 +245,7 @@ class _Random implements Random {
   static const _POW2_27_D = 1.0 * (1 << 27);
 
   // Use a singleton Random object to get a new seed if no seed was passed.
-  static final _prng = new _Random._withState(_initialSeed());
+  static final _prng = _Random._withState(_initialSeed());
 
   // Thomas Wang 64-bit mix.
   // http://www.concentric.net/~Ttwang/tech/inthash.htm

sdk/lib/_internal/vm/lib/mirrors_impl.dart

@@ -15,12 +15,12 @@ class _InternalMirrorError extends Error {
 String _n(Symbol symbol) => internal.Symbol.getName(symbol as internal.Symbol);
 
 Symbol _s(String name) {
-  return new internal.Symbol.unvalidated(name);
+  return internal.Symbol.unvalidated(name);
 }
 
 Symbol? _sOpt(String? name) {
   if (name == null) return null;
-  return new internal.Symbol.unvalidated(name);
+  return internal.Symbol.unvalidated(name);
 }
 
 Symbol _computeQualifiedName(DeclarationMirror? owner, Symbol simpleName) {
@@ -32,7 +32,7 @@ String _makeSignatureString(
   TypeMirror returnType,
   List<ParameterMirror> parameters,
 ) {
-  StringBuffer buf = new StringBuffer();
+  StringBuffer buf = StringBuffer();
   buf.write('(');
   bool found_optional_positional = false;
   bool found_optional_named = false;
@@ -78,25 +78,25 @@ List<InstanceMirror> _wrapMetadata(List reflectees) {
   for (var reflectee in reflectees) {
     mirrors.add(reflect(reflectee));
   }
-  return new UnmodifiableListView<InstanceMirror>(mirrors);
+  return UnmodifiableListView<InstanceMirror>(mirrors);
 }
 
 @pragma("vm:external-name", "TypeMirror_subtypeTest")
 external bool _subtypeTest(Type a, Type b);
 
 class _MirrorSystem extends MirrorSystem {
-  final TypeMirror dynamicType = new _SpecialTypeMirror._('dynamic');
-  final TypeMirror voidType = new _SpecialTypeMirror._('void');
-  final TypeMirror neverType = new _SpecialTypeMirror._('Never');
+  final TypeMirror dynamicType = _SpecialTypeMirror._('dynamic');
+  final TypeMirror voidType = _SpecialTypeMirror._('void');
+  final TypeMirror neverType = _SpecialTypeMirror._('Never');
 
   var _libraries;
   Map<Uri, LibraryMirror> get libraries {
     if ((_libraries == null) || _dirty) {
-      _libraries = new Map<Uri, LibraryMirror>();
+      _libraries = Map<Uri, LibraryMirror>();
       for (LibraryMirror lib in _computeLibraries()) {
         _libraries[lib.uri] = lib;
       }
-      _libraries = new UnmodifiableMapView<Uri, LibraryMirror>(_libraries);
+      _libraries = UnmodifiableMapView<Uri, LibraryMirror>(_libraries);
       _dirty = false;
     }
     return _libraries;
@@ -147,7 +147,7 @@ class _IsolateMirror extends Mirror implements IsolateMirror {
     var result = _loadUri(uri.toString());
     if (result == null) {
       // Censored library.
-      throw new Exception("Cannot load $uri");
+      throw Exception("Cannot load $uri");
     }
     return result;
   }
@@ -195,8 +195,8 @@ class _SyntheticAccessor implements MethodMirror {
   TypeMirror get returnType => _target.type;
   List<ParameterMirror> get parameters {
     if (isGetter) return const <ParameterMirror>[];
-    return new UnmodifiableListView<ParameterMirror>(<ParameterMirror>[
-      new _SyntheticSetterParameter(this, this._target),
+    return UnmodifiableListView<ParameterMirror>(<ParameterMirror>[
+      _SyntheticSetterParameter(this, this._target),
     ]);
   }
 
@@ -247,9 +247,9 @@ abstract class _ObjectMirror extends Mirror implements ObjectMirror {
     int numPositionalArguments = positionalArguments.length;
     int numNamedArguments = namedArguments.length;
     int numArguments = numPositionalArguments + numNamedArguments;
-    List arguments = new List<dynamic>.filled(numArguments, null);
+    List arguments = List<dynamic>.filled(numArguments, null);
     arguments.setRange(0, numPositionalArguments, positionalArguments);
-    List names = new List<dynamic>.filled(numNamedArguments, null);
+    List names = List<dynamic>.filled(numNamedArguments, null);
     int argumentIndex = numPositionalArguments;
     int nameIndex = 0;
     if (numNamedArguments > 0) {
@@ -343,10 +343,10 @@ class _InstanceMirror extends _ObjectMirror implements InstanceMirror {
     int numPositionalArguments = positionalArguments.length + 1; // Receiver.
     int numNamedArguments = namedArguments.length;
     int numArguments = numPositionalArguments + numNamedArguments;
-    List arguments = new List<dynamic>.filled(numArguments, null);
+    List arguments = List<dynamic>.filled(numArguments, null);
     arguments[0] = _reflectee; // Receiver.
     arguments.setRange(1, numPositionalArguments, positionalArguments);
-    List names = new List<dynamic>.filled(numNamedArguments, null);
+    List names = List<dynamic>.filled(numNamedArguments, null);
     int argumentIndex = numPositionalArguments;
     int nameIndex = 0;
     if (numNamedArguments > 0) {
@@ -433,9 +433,7 @@ class _ClassMirror extends _ObjectMirror implements ClassMirror, _TypeMirror {
   bool get hasReflectedType => !_isGenericDeclaration;
   Type get reflectedType {
     if (!hasReflectedType) {
-      throw new UnsupportedError(
-        "Declarations of generics have no reflected type",
-      );
+      throw UnsupportedError("Declarations of generics have no reflected type");
     }
     return _reflectedType;
   }
@@ -510,7 +508,7 @@ class _ClassMirror extends _ObjectMirror implements ClassMirror, _TypeMirror {
     for (var interfaceType in interfaceTypes) {
       interfaceMirrors.add(reflectType(interfaceType) as ClassMirror);
     }
-    return _superinterfaces = new UnmodifiableListView<ClassMirror>(
+    return _superinterfaces = UnmodifiableListView<ClassMirror>(
       interfaceMirrors,
     );
   }
@@ -550,7 +548,7 @@ class _ClassMirror extends _ObjectMirror implements ClassMirror, _TypeMirror {
     var m = _cachedStaticMembers;
     if (m != null) m;
 
-    var result = new Map<Symbol, MethodMirror>();
+    var result = Map<Symbol, MethodMirror>();
     var library = this.owner as LibraryMirror;
     declarations.values.forEach((decl) {
       if (decl is MethodMirror && decl.isStatic && !decl.isConstructor) {
@@ -558,7 +556,7 @@ class _ClassMirror extends _ObjectMirror implements ClassMirror, _TypeMirror {
       }
       if (decl is VariableMirror && decl.isStatic) {
         var getterName = decl.simpleName;
-        result[getterName] = new _SyntheticAccessor(
+        result[getterName] = _SyntheticAccessor(
           this,
           getterName,
           true,
@@ -568,7 +566,7 @@ class _ClassMirror extends _ObjectMirror implements ClassMirror, _TypeMirror {
         );
         if (!decl.isFinal) {
           var setterName = _asSetter(decl.simpleName, library);
-          result[setterName] = new _SyntheticAccessor(
+          result[setterName] = _SyntheticAccessor(
             this,
             setterName,
             false,
@@ -579,7 +577,7 @@ class _ClassMirror extends _ObjectMirror implements ClassMirror, _TypeMirror {
         }
       }
     });
-    return _cachedStaticMembers = new UnmodifiableMapView<Symbol, MethodMirror>(
+    return _cachedStaticMembers = UnmodifiableMapView<Symbol, MethodMirror>(
       result,
     );
   }
@@ -589,7 +587,7 @@ class _ClassMirror extends _ObjectMirror implements ClassMirror, _TypeMirror {
     var m = _cachedInstanceMembers;
     if (m != null) return m;
 
-    var result = new Map<Symbol, MethodMirror>();
+    var result = Map<Symbol, MethodMirror>();
     var library = this.owner as LibraryMirror;
     var sup = superclass;
     if (sup != null) {
@@ -604,7 +602,7 @@ class _ClassMirror extends _ObjectMirror implements ClassMirror, _TypeMirror {
       }
       if (decl is VariableMirror && !decl.isStatic) {
         var getterName = decl.simpleName;
-        result[getterName] = new _SyntheticAccessor(
+        result[getterName] = _SyntheticAccessor(
           this,
           getterName,
           true,
@@ -614,7 +612,7 @@ class _ClassMirror extends _ObjectMirror implements ClassMirror, _TypeMirror {
         );
         if (!decl.isFinal) {
           var setterName = _asSetter(decl.simpleName, library);
-          result[setterName] = new _SyntheticAccessor(
+          result[setterName] = _SyntheticAccessor(
             this,
             setterName,
             false,
@@ -625,8 +623,9 @@ class _ClassMirror extends _ObjectMirror implements ClassMirror, _TypeMirror {
         }
       }
     });
-    return _cachedInstanceMembers =
-        new UnmodifiableMapView<Symbol, MethodMirror>(result);
+    return _cachedInstanceMembers = UnmodifiableMapView<Symbol, MethodMirror>(
+      result,
+    );
   }
 
   Map<Symbol, DeclarationMirror>? _declarations;
@@ -634,7 +633,7 @@ class _ClassMirror extends _ObjectMirror implements ClassMirror, _TypeMirror {
     var d = _declarations;
     if (d != null) return d;
 
-    var decls = new Map<Symbol, DeclarationMirror>();
+    var decls = Map<Symbol, DeclarationMirror>();
 
     var members = _computeMembers(mixin, _instantiator, _reflectee);
     for (var member in members) {
@@ -652,7 +651,7 @@ class _ClassMirror extends _ObjectMirror implements ClassMirror, _TypeMirror {
       decls[typeVariable.simpleName] = typeVariable;
     }
 
-    return _declarations = new UnmodifiableMapView<Symbol, DeclarationMirror>(
+    return _declarations = UnmodifiableMapView<Symbol, DeclarationMirror>(
       decls,
     );
   }
@@ -677,12 +676,10 @@ class _ClassMirror extends _ObjectMirror implements ClassMirror, _TypeMirror {
     ClassMirror owner = originalDeclaration;
     var mirror;
     for (var i = 0; i < params.length; i += 2) {
-      mirror = new _TypeVariableMirror._(params[i + 1], params[i], owner);
+      mirror = _TypeVariableMirror._(params[i + 1], params[i], owner);
       result.add(mirror);
     }
-    return _typeVariables = new UnmodifiableListView<TypeVariableMirror>(
-      result,
-    );
+    return _typeVariables = UnmodifiableListView<TypeVariableMirror>(result);
   }
 
   List<TypeMirror>? _typeArguments;
@@ -694,7 +691,7 @@ class _ClassMirror extends _ObjectMirror implements ClassMirror, _TypeMirror {
         (!_isTransformedMixinApplication && _isAnonymousMixinApplication)) {
       return _typeArguments = const <TypeMirror>[];
     } else {
-      return _typeArguments = new UnmodifiableListView<TypeMirror>(
+      return _typeArguments = UnmodifiableListView<TypeMirror>(
         _computeTypeArguments(_reflectedType).cast<TypeMirror>(),
       );
     }
@@ -722,9 +719,9 @@ class _ClassMirror extends _ObjectMirror implements ClassMirror, _TypeMirror {
     int numPositionalArguments = positionalArguments.length;
     int numNamedArguments = namedArguments.length;
     int numArguments = numPositionalArguments + numNamedArguments;
-    List arguments = new List<dynamic>.filled(numArguments, null);
+    List arguments = List<dynamic>.filled(numArguments, null);
     arguments.setRange(0, numPositionalArguments, positionalArguments);
-    List names = new List<dynamic>.filled(numNamedArguments, null);
+    List names = List<dynamic>.filled(numNamedArguments, null);
     int argumentIndex = numPositionalArguments;
     int nameIndex = 0;
     if (numNamedArguments > 0) {
@@ -777,7 +774,7 @@ class _ClassMirror extends _ObjectMirror implements ClassMirror, _TypeMirror {
   bool isSubclassOf(ClassMirror other) {
     // TODO: Remove these null checks once all code is opted into strong nonnullable mode.
     if (other == null) {
-      throw new ArgumentError.notNull('other');
+      throw ArgumentError.notNull('other');
     }
     ClassMirror otherDeclaration = other.originalDeclaration as ClassMirror;
     ClassMirror? c = this;
@@ -886,7 +883,7 @@ class _FunctionTypeMirror extends _ClassMirror implements FunctionTypeMirror {
   List<ParameterMirror> get parameters {
     var p = _parameters;
     if (p != null) return p;
-    return _parameters = new UnmodifiableListView<ParameterMirror>(
+    return _parameters = UnmodifiableListView<ParameterMirror>(
       _FunctionTypeMirror_parameters(
         _signatureReflectee,
       ).cast<ParameterMirror>(),
@@ -972,7 +969,7 @@ class _TypeVariableMirror extends _DeclarationMirror
 
   bool get hasReflectedType => false;
   Type get reflectedType {
-    throw new UnsupportedError('Type variables have no reflected type');
+    throw UnsupportedError('Type variables have no reflected type');
   }
 
   Type get _reflectedType => _reflectee;
@@ -1044,13 +1041,13 @@ class _LibraryMirror extends _ObjectMirror implements LibraryMirror {
     var d = _declarations;
     if (d != null) return d;
 
-    var decls = new Map<Symbol, DeclarationMirror>();
+    var decls = Map<Symbol, DeclarationMirror>();
     var members = _computeMembers(_reflectee);
     for (var member in members) {
       decls[member.simpleName] = member;
     }
 
-    return _declarations = new UnmodifiableMapView<Symbol, DeclarationMirror>(
+    return _declarations = UnmodifiableMapView<Symbol, DeclarationMirror>(
       decls,
     );
   }
@@ -1076,7 +1073,7 @@ class _LibraryMirror extends _ObjectMirror implements LibraryMirror {
     var d = _cachedLibraryDependencies;
     if (d != null) return d;
     return _cachedLibraryDependencies =
-        new UnmodifiableListView<LibraryDependencyMirror>(
+        UnmodifiableListView<LibraryDependencyMirror>(
           _libraryDependencies(_reflectee).cast<LibraryDependencyMirror>(),
         );
   }
@@ -1116,7 +1113,7 @@ class _LibraryDependencyMirror extends Mirror
     this.isDeferred,
     List<dynamic> unwrappedMetadata,
   ) : prefix = _sOpt(prefixString),
-      combinators = new UnmodifiableListView<CombinatorMirror>(
+      combinators = UnmodifiableListView<CombinatorMirror>(
         mutableCombinators.cast<CombinatorMirror>(),
       ),
       metadata = _wrapMetadata(unwrappedMetadata);
@@ -1136,7 +1133,7 @@ class _LibraryDependencyMirror extends Mirror
 
   Future<LibraryMirror> loadLibrary() {
     if (_targetMirrorOrPrefix is _LibraryMirror) {
-      return new Future.value(_targetMirrorOrPrefix);
+      return Future.value(_targetMirrorOrPrefix);
     }
     var savedPrefix = _targetMirrorOrPrefix;
     return savedPrefix.loadLibrary().then((_) {
@@ -1155,7 +1152,7 @@ class _CombinatorMirror extends Mirror implements CombinatorMirror {
   final bool isShow;
 
   _CombinatorMirror._(identifierString, this.isShow)
-    : this.identifiers = new UnmodifiableListView<Symbol>(<Symbol>[
+    : this.identifiers = UnmodifiableListView<Symbol>(<Symbol>[
         _s(identifierString),
       ]);
 
@@ -1206,7 +1203,7 @@ class _MethodMirror extends _DeclarationMirror implements MethodMirror {
   bool get isExtensionTypeMember =>
       0 != (_kindFlags & (1 << kExtensionTypeMember));
 
-  static const _operators = const [
+  static const _operators = [
     "%", "&", "*", "+", "-", "/", "<", "<<", //
     "<=", "==", ">", ">=", ">>", "[]", "[]=",
     "^", "|", "~", "unary-", "~/",
@@ -1244,7 +1241,7 @@ class _MethodMirror extends _DeclarationMirror implements MethodMirror {
   List<ParameterMirror> get parameters {
     var p = _parameters;
     if (p != null) return p;
-    return _parameters = new UnmodifiableListView<ParameterMirror>(
+    return _parameters = UnmodifiableListView<ParameterMirror>(
       _MethodMirror_parameters(_reflectee).cast<ParameterMirror>(),
     );
   }
@@ -1261,7 +1258,7 @@ class _MethodMirror extends _DeclarationMirror implements MethodMirror {
     } else {
       var parts = MirrorSystem.getName(simpleName).split('.');
       if (parts.length > 2) {
-        throw new _InternalMirrorError(
+        throw _InternalMirrorError(
           'Internal error in MethodMirror.constructorName: '
           'malformed name <$simpleName>',
         );
@@ -1334,7 +1331,7 @@ class _VariableMirror extends _DeclarationMirror implements VariableMirror {
     } else if (o is _LibraryMirror) {
       return o._instantiator;
     } else {
-      throw new UnsupportedError("unexpected owner ${owner}");
+      throw UnsupportedError("unexpected owner ${owner}");
     }
   }
 
@@ -1395,7 +1392,7 @@ class _ParameterMirror extends _VariableMirror implements ParameterMirror {
   bool get hasDefaultValue => _defaultValueReflectee != null;
 
   SourceLocation? get location {
-    throw new UnsupportedError("ParameterMirror.location unimplemented");
+    throw UnsupportedError("ParameterMirror.location unimplemented");
   }
 
   List<InstanceMirror> get metadata {
@@ -1440,7 +1437,7 @@ class _SpecialTypeMirror extends Mirror
   bool get hasReflectedType => simpleName == #dynamic;
   Type get reflectedType {
     if (simpleName == #dynamic) return dynamic;
-    throw new UnsupportedError("void has no reflected type");
+    throw UnsupportedError("void has no reflected type");
   }
 
   List<TypeVariableMirror> get typeVariables => const <TypeVariableMirror>[];
@@ -1472,7 +1469,7 @@ class _SpecialTypeMirror extends Mirror
 }
 
 class _Mirrors {
-  static MirrorSystem _currentMirrorSystem = new _MirrorSystem();
+  static MirrorSystem _currentMirrorSystem = _MirrorSystem();
   static MirrorSystem currentMirrorSystem() {
     return _currentMirrorSystem;
   }
@@ -1480,8 +1477,8 @@ class _Mirrors {
   // Creates a new local mirror for some Object.
   static InstanceMirror reflect(dynamic reflectee) {
     return reflectee is Function
-        ? new _ClosureMirror._(reflectee)
-        : new _InstanceMirror._(reflectee);
+        ? _ClosureMirror._(reflectee)
+        : _InstanceMirror._(reflectee);
   }
 
   @pragma("vm:external-name", "Mirrors_makeLocalClassMirror")
@@ -1491,8 +1488,8 @@ class _Mirrors {
   @pragma("vm:external-name", "Mirrors_instantiateGenericType")
   external static Type _instantiateGenericType(Type key, typeArguments);
 
-  static Expando<_ClassMirror> _declarationCache = new Expando("ClassMirror");
-  static Expando<TypeMirror> _instantiationCache = new Expando("TypeMirror");
+  static Expando<_ClassMirror> _declarationCache = Expando("ClassMirror");
+  static Expando<TypeMirror> _instantiationCache = Expando("TypeMirror");
 
   static ClassMirror reflectClass(Type key) {
     var classMirror = _declarationCache[key];
@@ -1523,7 +1520,7 @@ class _Mirrors {
 
   static Type _instantiateType(Type key, List<Type> typeArguments) {
     if (typeArguments.isEmpty) {
-      throw new ArgumentError.value(
+      throw ArgumentError.value(
         typeArguments,
         'typeArguments',
         'Type arguments list cannot be empty.',

sdk/lib/_internal/vm/lib/mirrors_patch.dart

@@ -66,12 +66,12 @@ class MirrorSystem {
     }
     if (candidates.length > 1) {
       var uris = candidates.map((lib) => lib.uri.toString()).toList();
-      throw new Exception(
+      throw Exception(
         "There are multiple libraries named "
         "'${getName(libraryName)}': $uris",
       );
     }
-    throw new Exception("There is no library named '${getName(libraryName)}'");
+    throw Exception("There is no library named '${getName(libraryName)}'");
   }
 
   @patch
@@ -83,12 +83,12 @@ class MirrorSystem {
   static Symbol getSymbol(String name, [LibraryMirror? library]) {
     if ((library != null && library is! _LibraryMirror) ||
         ((name.length > 0) && (name[0] == '_') && (library == null))) {
-      throw new ArgumentError(library);
+      throw ArgumentError(library);
     }
     if (library != null) {
       name = _mangleName(name, (library as _LibraryMirror)._reflectee);
     }
-    return new internal.Symbol.unvalidated(name);
+    return internal.Symbol.unvalidated(name);
   }
 
   @pragma("vm:external-name", "Mirrors_mangleName")

sdk/lib/_internal/vm/lib/object_patch.dart

@@ -35,7 +35,7 @@ class Object {
   @pragma("vm:entry-point", "call")
   dynamic noSuchMethod(Invocation invocation) {
     // TODO(regis): Remove temp constructor identifier 'withInvocation'.
-    throw new NoSuchMethodError.withInvocation(this, invocation);
+    throw NoSuchMethodError.withInvocation(this, invocation);
   }
 
   @patch

sdk/lib/_internal/vm/lib/print_patch.dart

@@ -14,7 +14,7 @@ void printToConsole(String line) {
 }
 
 void _unsupportedPrint(String line) {
-  throw new UnsupportedError("'print' is not supported");
+  throw UnsupportedError("'print' is not supported");
 }
 
 // _printClosure can be overwritten by the embedder to supply a different

sdk/lib/_internal/vm/lib/profiler.dart

@@ -8,7 +8,7 @@ part of "developer.dart";
 class UserTag {
   @patch
   factory UserTag(String label) {
-    return new _UserTag(label);
+    return _UserTag(label);
   }
   @patch
   static UserTag get defaultTag => _getDefaultTag();

sdk/lib/_internal/vm/lib/regexp_patch.dart

@@ -14,7 +14,7 @@ class RegExp {
     bool unicode = false,
     bool dotAll = false,
   }) {
-    return new _RegExp(
+    return _RegExp(
       source,
       multiLine: multiLine,
       caseSensitive: caseSensitive,
@@ -59,7 +59,7 @@ class RegExp {
     // If the text contains no characters needing escape, return it directly.
     if (escapeCharIndex == text.length) return text;
 
-    var buffer = new StringBuffer();
+    var buffer = StringBuffer();
     int previousSliceEndIndex = 0;
     do {
       // Copy characters from previous escape to current escape into result.
@@ -96,7 +96,7 @@ class _RegExpMatch implements RegExpMatch {
 
   String? group(int groupIdx) {
     if (groupIdx < 0 || groupIdx > _regexp._groupCount) {
-      throw new RangeError.value(groupIdx);
+      throw RangeError.value(groupIdx);
     }
     int startIndex = _start(groupIdx);
     int endIndex = _end(groupIdx);
@@ -112,7 +112,7 @@ class _RegExpMatch implements RegExpMatch {
   }
 
   List<String?> groups(List<int> groupsSpec) {
-    var groupsList = new List<String?>.filled(groupsSpec.length, null);
+    var groupsList = List<String?>.filled(groupsSpec.length, null);
     for (int i = 0; i < groupsSpec.length; i++) {
       groupsList[i] = group(groupsSpec[i]);
     }
@@ -156,46 +156,46 @@ class _RegExp implements RegExp {
 
   RegExpMatch? firstMatch(String input) {
     // TODO: Remove these null checks once all code is opted into strong nonnullable mode.
-    if (input == null) throw new ArgumentError.notNull('input');
+    if (input == null) throw ArgumentError.notNull('input');
     final match = _ExecuteMatch(input, 0);
     if (match == null) {
       return null;
     }
-    return new _RegExpMatch._(this, input, match);
+    return _RegExpMatch._(this, input, match);
   }
 
   Iterable<RegExpMatch> allMatches(String string, [int start = 0]) {
     // TODO: Remove these null checks once all code is opted into strong nonnullable mode.
-    if (string == null) throw new ArgumentError.notNull('string');
-    if (start == null) throw new ArgumentError.notNull('start');
+    if (string == null) throw ArgumentError.notNull('string');
+    if (start == null) throw ArgumentError.notNull('start');
     if (0 > start || start > string.length) {
-      throw new RangeError.range(start, 0, string.length);
+      throw RangeError.range(start, 0, string.length);
     }
-    return new _AllMatchesIterable(this, string, start);
+    return _AllMatchesIterable(this, string, start);
   }
 
   RegExpMatch? matchAsPrefix(String string, [int start = 0]) {
     // TODO: Remove these null checks once all code is opted into strong nonnullable mode.
-    if (string == null) throw new ArgumentError.notNull('string');
-    if (start == null) throw new ArgumentError.notNull('start');
+    if (string == null) throw ArgumentError.notNull('string');
+    if (start == null) throw ArgumentError.notNull('start');
     if (start < 0 || start > string.length) {
-      throw new RangeError.range(start, 0, string.length);
+      throw RangeError.range(start, 0, string.length);
     }
     final list = _ExecuteMatchSticky(string, start);
     if (list == null) return null;
-    return new _RegExpMatch._(this, string, list);
+    return _RegExpMatch._(this, string, list);
   }
 
   bool hasMatch(String input) {
     // TODO: Remove these null checks once all code is opted into strong nonnullable mode.
-    if (input == null) throw new ArgumentError.notNull('input');
+    if (input == null) throw ArgumentError.notNull('input');
     List? match = _ExecuteMatch(input, 0);
     return (match == null) ? false : true;
   }
 
   String? stringMatch(String input) {
     // TODO: Remove these null checks once all code is opted into strong nonnullable mode.
-    if (input == null) throw new ArgumentError.notNull('input');
+    if (input == null) throw ArgumentError.notNull('input');
     List? match = _ExecuteMatch(input, 0);
     if (match == null) {
       return null;
@@ -253,7 +253,7 @@ class _RegExp implements RegExp {
   // Byte map of one byte characters with a 0xff if the character is a word
   // character (digit, letter or underscore) and 0x00 otherwise.
   // Used by generated RegExp code.
-  static const List<int> _wordCharacterMap = const <int>[
+  static const List<int> _wordCharacterMap = <int>[
     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
@@ -337,8 +337,7 @@ class _AllMatchesIterable extends Iterable<RegExpMatch> {
 
   _AllMatchesIterable(this._re, this._str, this._start);
 
-  Iterator<RegExpMatch> get iterator =>
-      new _AllMatchesIterator(_re, _str, _start);
+  Iterator<RegExpMatch> get iterator => _AllMatchesIterator(_re, _str, _start);
 }
 
 class _AllMatchesIterator implements Iterator<RegExpMatch> {
@@ -365,7 +364,7 @@ class _AllMatchesIterator implements Iterator<RegExpMatch> {
     if (_nextIndex <= _str.length) {
       final match = re._ExecuteMatch(_str, _nextIndex);
       if (match != null) {
-        var current = new _RegExpMatch._(re, _str, match);
+        var current = _RegExpMatch._(re, _str, match);
         _current = current;
         _nextIndex = current.end;
         if (_nextIndex == current.start) {

sdk/lib/_internal/vm/lib/schedule_microtask_patch.dart

@@ -10,7 +10,7 @@ class _AsyncRun {
   static void _scheduleImmediate(void callback()) {
     final closure = _ScheduleImmediate._closure;
     if (closure == null) {
-      throw new UnsupportedError("Microtasks are not supported");
+      throw UnsupportedError("Microtasks are not supported");
     }
     closure(callback);
   }

sdk/lib/_internal/vm/lib/string_patch.dart

@@ -20,8 +20,8 @@ class String {
     int? end,
   ]) {
     // TODO: Remove these null checks once all code is opted into strong nonnullable mode.
-    if (charCodes == null) throw new ArgumentError.notNull("charCodes");
-    if (start == null) throw new ArgumentError.notNull("start");
+    if (charCodes == null) throw ArgumentError.notNull("charCodes");
+    if (start == null) throw ArgumentError.notNull("start");
     return _StringBase.createFromCharCodes(charCodes, start, end, null);
   }
 
@@ -43,7 +43,7 @@ class String {
           .._setAt(1, low);
       }
     }
-    throw new RangeError.range(charCode, 0, 0x10ffff);
+    throw RangeError.range(charCode, 0, 0x10ffff);
   }
 
   @patch
@@ -96,7 +96,7 @@ abstract final class _StringBase implements String {
   static const int _maxJoinReplaceOneByteStringLength = 500;
 
   factory _StringBase._uninstantiable() {
-    throw new UnsupportedError("_StringBase can't be instantiated");
+    throw UnsupportedError("_StringBase can't be instantiated");
   }
 
   @pragma("vm:recognized", "asm-intrinsic")
@@ -170,7 +170,7 @@ abstract final class _StringBase implements String {
 
     final int actualLimit = limit ?? _scanCodeUnits(typedCharCodes, start, end);
     if (actualLimit < 0) {
-      throw new ArgumentError(typedCharCodes);
+      throw ArgumentError(typedCharCodes);
     }
     if (actualLimit <= _maxLatin1) {
       return _createOneByteString(typedCharCodes, start, len);
@@ -192,7 +192,7 @@ abstract final class _StringBase implements String {
     int bits = 0;
     for (int i = start; i < end; i++) {
       int code = charCodes[i];
-      if (code is! _Smi) throw new ArgumentError(charCodes);
+      if (code is! _Smi) throw ArgumentError(charCodes);
       bits |= code;
     }
     return bits;
@@ -375,7 +375,7 @@ abstract final class _StringBase implements String {
 
   bool startsWith(Pattern pattern, [int index = 0]) {
     if ((index < 0) || (index > this.length)) {
-      throw new RangeError.range(index, 0, this.length);
+      throw RangeError.range(index, 0, this.length);
     }
     if (pattern is String) {
       return _substringMatches(index, pattern);
@@ -417,7 +417,7 @@ abstract final class _StringBase implements String {
     if (start == null) {
       start = this.length;
     } else if (start < 0 || start > this.length) {
-      throw new RangeError.range(start, 0, this.length);
+      throw RangeError.range(start, 0, this.length);
     }
     if (pattern is String) {
       String other = pattern;
@@ -580,7 +580,7 @@ abstract final class _StringBase implements String {
   String operator *(int times) {
     if (times <= 0) return "";
     if (times == 1) return this;
-    StringBuffer buffer = new StringBuffer(this);
+    StringBuffer buffer = StringBuffer(this);
     for (int i = 1; i < times; i++) {
       buffer.write(this);
     }
@@ -590,7 +590,7 @@ abstract final class _StringBase implements String {
   String padLeft(int width, [String padding = ' ']) {
     int delta = width - this.length;
     if (delta <= 0) return this;
-    StringBuffer buffer = new StringBuffer();
+    StringBuffer buffer = StringBuffer();
     for (int i = 0; i < delta; i++) {
       buffer.write(padding);
     }
@@ -601,7 +601,7 @@ abstract final class _StringBase implements String {
   String padRight(int width, [String padding = ' ']) {
     int delta = width - this.length;
     if (delta <= 0) return this;
-    StringBuffer buffer = new StringBuffer(this);
+    StringBuffer buffer = StringBuffer(this);
     for (int i = 0; i < delta; i++) {
       buffer.write(padding);
     }
@@ -671,8 +671,8 @@ abstract final class _StringBase implements String {
   }
 
   String replaceAll(Pattern pattern, String replacement) {
-    if (pattern == null) throw new ArgumentError.notNull("pattern");
-    if (replacement == null) throw new ArgumentError.notNull("replacement");
+    if (pattern == null) throw ArgumentError.notNull("pattern");
+    if (replacement == null) throw ArgumentError.notNull("replacement");
 
     int startIndex = 0;
     // String fragments that replace the prefix [this] up to [startIndex].
@@ -770,8 +770,8 @@ abstract final class _StringBase implements String {
   );
 
   String replaceAllMapped(Pattern pattern, String replace(Match match)) {
-    if (pattern == null) throw new ArgumentError.notNull("pattern");
-    if (replace == null) throw new ArgumentError.notNull("replace");
+    if (pattern == null) throw ArgumentError.notNull("pattern");
+    if (replace == null) throw ArgumentError.notNull("replace");
     List matches = [];
     int length = 0;
     int startIndex = 0;
@@ -805,9 +805,9 @@ abstract final class _StringBase implements String {
     String replace(Match match), [
     int startIndex = 0,
   ]) {
-    if (pattern == null) throw new ArgumentError.notNull("pattern");
-    if (replace == null) throw new ArgumentError.notNull("replace");
-    if (startIndex == null) throw new ArgumentError.notNull("startIndex");
+    if (pattern == null) throw ArgumentError.notNull("pattern");
+    if (replace == null) throw ArgumentError.notNull("replace");
+    if (startIndex == null) throw ArgumentError.notNull("startIndex");
     RangeError.checkValueInInterval(startIndex, 0, this.length, "startIndex");
 
     var matches = pattern.allMatches(this, startIndex).iterator;
@@ -825,12 +825,12 @@ abstract final class _StringBase implements String {
     String onNonMatch(String nonMatch),
   ) {
     // Pattern is the empty string.
-    StringBuffer buffer = new StringBuffer();
+    StringBuffer buffer = StringBuffer();
     int length = this.length;
     int i = 0;
     buffer.write(onNonMatch(""));
     while (i < length) {
-      buffer.write(onMatch(new _StringMatch(i, this, "")));
+      buffer.write(onMatch(_StringMatch(i, this, "")));
       // Special case to avoid splitting a surrogate pair.
       int code = this.codeUnitAt(i);
       if ((code & ~0x3FF) == 0xD800 && length > i + 1) {
@@ -846,7 +846,7 @@ abstract final class _StringBase implements String {
       buffer.write(onNonMatch(this[i]));
       i++;
     }
-    buffer.write(onMatch(new _StringMatch(i, this, "")));
+    buffer.write(onMatch(_StringMatch(i, this, "")));
     buffer.write(onNonMatch(""));
     return buffer.toString();
   }
@@ -857,7 +857,7 @@ abstract final class _StringBase implements String {
     String onNonMatch(String nonMatch)?,
   }) {
     if (pattern == null) {
-      throw new ArgumentError.notNull("pattern");
+      throw ArgumentError.notNull("pattern");
     }
     onMatch ??= _matchString;
     onNonMatch ??= _stringIdentity;
@@ -867,7 +867,7 @@ abstract final class _StringBase implements String {
         return _splitMapJoinEmptyString(onMatch, onNonMatch);
       }
     }
-    StringBuffer buffer = new StringBuffer();
+    StringBuffer buffer = StringBuffer();
     int startIndex = 0;
     for (Match match in pattern.allMatches(this)) {
       buffer.write(onNonMatch(this.substring(startIndex, match.start)));
@@ -932,23 +932,19 @@ abstract final class _StringBase implements String {
 
   static ArgumentError _interpolationError(Object? o, Object? result) {
     // Since Dart 2.0, [result] can only be null.
-    return new ArgumentError.value(
-      o,
-      "object",
-      "toString method returned 'null'",
-    );
+    return ArgumentError.value(o, "object", "toString method returned 'null'");
   }
 
   Iterable<Match> allMatches(String string, [int start = 0]) {
     if (start < 0 || start > string.length) {
-      throw new RangeError.range(start, 0, string.length, "start");
+      throw RangeError.range(start, 0, string.length, "start");
     }
-    return new _StringAllMatchesIterable(string, this, start);
+    return _StringAllMatchesIterable(string, this, start);
   }
 
   Match? matchAsPrefix(String string, [int start = 0]) {
     if (start < 0 || start > string.length) {
-      throw new RangeError.range(start, 0, string.length);
+      throw RangeError.range(start, 0, string.length);
     }
     if (start + this.length > string.length) return null;
     for (int i = 0; i < this.length; i++) {
@@ -956,12 +952,12 @@ abstract final class _StringBase implements String {
         return null;
       }
     }
-    return new _StringMatch(start, string, this);
+    return _StringMatch(start, string, this);
   }
 
   List<String> split(Pattern pattern) {
     if ((pattern is String) && pattern.isEmpty) {
-      List<String> result = new List<String>.generate(
+      List<String> result = List<String>.generate(
         this.length,
         (int i) => this[i],
       );
@@ -999,9 +995,9 @@ abstract final class _StringBase implements String {
     return result;
   }
 
-  List<int> get codeUnits => new CodeUnits(this);
+  List<int> get codeUnits => CodeUnits(this);
 
-  Runes get runes => new Runes(this);
+  Runes get runes => Runes(this);
 
   @pragma("vm:external-name", "String_toUpperCase")
   external String toUpperCase();
@@ -1446,7 +1442,7 @@ final class _StringMatch implements Match {
 
   String group(int group) {
     if (group != 0) {
-      throw new RangeError.value(group);
+      throw RangeError.value(group);
     }
     return pattern;
   }
@@ -1472,12 +1468,12 @@ final class _StringAllMatchesIterable extends Iterable<Match> {
   _StringAllMatchesIterable(this._input, this._pattern, this._index);
 
   Iterator<Match> get iterator =>
-      new _StringAllMatchesIterator(_input, _pattern, _index);
+      _StringAllMatchesIterator(_input, _pattern, _index);
 
   Match get first {
     int index = _input.indexOf(_pattern, _index);
     if (index >= 0) {
-      return new _StringMatch(index, _input, _pattern);
+      return _StringMatch(index, _input, _pattern);
     }
     throw IterableElementError.noElement();
   }
@@ -1503,7 +1499,7 @@ final class _StringAllMatchesIterator implements Iterator<Match> {
       return false;
     }
     int end = index + _pattern.length;
-    _current = new _StringMatch(index, _input, _pattern);
+    _current = _StringMatch(index, _input, _pattern);
     // Empty match, don't start at same location again.
     if (end == _index) end++;
     _index = end;

sdk/lib/_internal/vm/lib/symbol_patch.dart

@@ -24,7 +24,7 @@ class Symbol {
     // Class._constructor@xxx -> Class._constructor
     // _Class@xxx._constructor@xxx -> _Class._constructor
     // lib._S@xxx with lib._M1@xxx, lib._M2@xxx -> lib._S with lib._M1, lib._M2
-    StringBuffer result = new StringBuffer();
+    StringBuffer result = StringBuffer();
     bool add_setter_suffix = false;
     var pos = 0;
     if (string.length >= 4 && string[3] == ':') {

sdk/lib/_internal/vm/lib/timer_impl.dart

@@ -133,7 +133,7 @@ class _Timer implements Timer {
 
   // Timers are ordered by wakeup time. Timers with a timeout value of > 0 do
   // end up on the TimerHeap. Timers with a timeout of 0 are queued in a list.
-  static final _heap = new _TimerHeap();
+  static final _heap = _TimerHeap();
   static _Timer? _firstZeroTimer;
   static _Timer _lastZeroTimer = _sentinelTimer;
 
@@ -198,7 +198,7 @@ class _Timer implements Timer {
     int now = VMLibraryHooks.timerMillisecondClock();
     int wakeupTime = (milliSeconds == 0) ? now : (now + 1 + milliSeconds);
 
-    _Timer timer = new _Timer._internal(
+    _Timer timer = _Timer._internal(
       callback,
       wakeupTime,
       milliSeconds,
@@ -491,9 +491,9 @@ class _Timer implements Timer {
     bool repeating,
   ) {
     if (repeating) {
-      return new _Timer.periodic(milliSeconds, callback);
+      return _Timer.periodic(milliSeconds, callback);
     }
-    return new _Timer(milliSeconds, callback);
+    return _Timer(milliSeconds, callback);
   }
 }
 

sdk/lib/_internal/vm/lib/timer_patch.dart

@@ -10,7 +10,7 @@ class Timer {
   static Timer _createTimer(Duration duration, void callback()) {
     final factory = VMLibraryHooks.timerFactory;
     if (factory == null) {
-      throw new UnsupportedError("Timer interface not supported.");
+      throw UnsupportedError("Timer interface not supported.");
     }
     int milliseconds = duration.inMilliseconds;
     if (milliseconds < 0) milliseconds = 0;
@@ -26,7 +26,7 @@ class Timer {
   ) {
     final factory = VMLibraryHooks.timerFactory;
     if (factory == null) {
-      throw new UnsupportedError("Timer interface not supported.");
+      throw UnsupportedError("Timer interface not supported.");
     }
     int milliseconds = duration.inMilliseconds;
     if (milliseconds < 0) milliseconds = 0;

sdk/lib/_internal/vm/lib/uri_patch.dart

@@ -7,7 +7,7 @@ part of "core_patch.dart";
 typedef Uri _UriBaseClosure();
 
 Uri _unsupportedUriBase() {
-  throw new UnsupportedError("'Uri.base' is not supported");
+  throw UnsupportedError("'Uri.base' is not supported");
 }
 
 // _uriBaseClosure can be overwritten by the embedder to supply a different
@@ -57,7 +57,7 @@ class _Uri {
 
     // Encode the string into bytes then generate an ASCII only string
     // by percent encoding selected bytes.
-    StringBuffer result = new StringBuffer();
+    StringBuffer result = StringBuffer();
     for (int j = 0; j < i; j++) {
       result.writeCharCode(text.codeUnitAt(j));
     }

sdk/lib/_internal/vm_shared/lib/bigint_patch.dart

@@ -56,14 +56,14 @@ class BigInt implements Comparable<BigInt> {
       _BigIntImpl._tryParse(source, radix: radix);
 
   @patch
-  factory BigInt.from(num value) => new _BigIntImpl.from(value);
+  factory BigInt.from(num value) => _BigIntImpl.from(value);
 }
 
 int _max(int a, int b) => a > b ? a : b;
 int _min(int a, int b) => a < b ? a : b;
 
 /// Allocate a new digits list of even length.
-Uint32List _newDigits(int length) => new Uint32List(length + (length & 1));
+Uint32List _newDigits(int length) => Uint32List(length + (length & 1));
 
 /**
  * An implementation for the arbitrarily large integer.
@@ -81,14 +81,14 @@ class _BigIntImpl implements BigInt {
   static const int _halfDigitBits = _digitBits >> 1;
   static const int _halfDigitMask = (1 << _halfDigitBits) - 1;
 
-  static final _BigIntImpl zero = new _BigIntImpl._fromInt(0);
-  static final _BigIntImpl one = new _BigIntImpl._fromInt(1);
-  static final _BigIntImpl two = new _BigIntImpl._fromInt(2);
+  static final _BigIntImpl zero = _BigIntImpl._fromInt(0);
+  static final _BigIntImpl one = _BigIntImpl._fromInt(1);
+  static final _BigIntImpl two = _BigIntImpl._fromInt(2);
 
   static final _BigIntImpl _minusOne = -one;
-  static final _BigIntImpl _oneDigitMask = new _BigIntImpl._fromInt(_digitMask);
+  static final _BigIntImpl _oneDigitMask = _BigIntImpl._fromInt(_digitMask);
   static final _BigIntImpl _twoDigitMask = (one << (2 * _digitBits)) - one;
-  static final _BigIntImpl _oneBillion = new _BigIntImpl._fromInt(1000000000);
+  static final _BigIntImpl _oneBillion = _BigIntImpl._fromInt(1000000000);
   static const int _minInt = -0x8000000000000000;
   static const int _maxInt = 0x7fffffffffffffff;
 
@@ -101,7 +101,7 @@ class _BigIntImpl implements BigInt {
   /// Note that [_isIntrinsified] is still false if intrinsification occurs,
   /// so it should be used only inside methods which are replaced by
   /// intrinsification.
-  static final bool _isIntrinsified = new bool.fromEnvironment(
+  static final bool _isIntrinsified = bool.fromEnvironment(
     'dart.vm.not.a.compile.time.constant',
   );
 
@@ -167,7 +167,7 @@ class _BigIntImpl implements BigInt {
   static _BigIntImpl parse(String source, {int? radix}) {
     var result = _tryParse(source, radix: radix);
     if (result == null) {
-      throw new FormatException("Could not parse BigInt", source);
+      throw FormatException("Could not parse BigInt", source);
     }
     return result;
   }
@@ -188,7 +188,7 @@ class _BigIntImpl implements BigInt {
     for (int i = 0; i < source.length; i++) {
       part = part * 10 + source.codeUnitAt(i) - _0;
       if (++digitInPartCount == 9) {
-        result = result * _oneBillion + new _BigIntImpl._fromInt(part);
+        result = result * _oneBillion + _BigIntImpl._fromInt(part);
         part = 0;
         digitInPartCount = 0;
       }
@@ -252,7 +252,7 @@ class _BigIntImpl implements BigInt {
       digits[digitIndex--] = digit;
     }
     if (used == 1 && digits[0] == 0) return zero;
-    return new _BigIntImpl._(isNegative, used, digits);
+    return _BigIntImpl._(isNegative, used, digits);
   }
 
   /// Parses the given [source] as a [radix] literal.
@@ -261,11 +261,11 @@ class _BigIntImpl implements BigInt {
   /// this function returns `null`.
   static _BigIntImpl? _parseRadix(String source, int radix, bool isNegative) {
     var result = zero;
-    var base = new _BigIntImpl._fromInt(radix);
+    var base = _BigIntImpl._fromInt(radix);
     for (int i = 0; i < source.length; i++) {
       var value = _codeUnitToRadixValue(source.codeUnitAt(i));
       if (value >= radix) return null;
-      result = result * base + new _BigIntImpl._fromInt(value);
+      result = result * base + _BigIntImpl._fromInt(value);
     }
     if (isNegative) return -result;
     return result;
@@ -305,7 +305,7 @@ class _BigIntImpl implements BigInt {
     }
 
     if (radix < 2 || radix > 36) {
-      throw new RangeError.range(radix, 2, 36, 'radix');
+      throw RangeError.range(radix, 2, 36, 'radix');
     }
     if (radix == 10 && decimalMatch != null) {
       return _parseDecimal(decimalMatch, isNegative);
@@ -372,12 +372,12 @@ class _BigIntImpl implements BigInt {
     if (value == 2) return two;
 
     if (value.abs() < 0x100000000) {
-      return new _BigIntImpl._fromInt(value.toInt());
+      return _BigIntImpl._fromInt(value.toInt());
     }
     if (value is double) {
-      return new _BigIntImpl._fromDouble(value);
+      return _BigIntImpl._fromDouble(value);
     }
-    return new _BigIntImpl._fromInt(value as int);
+    return _BigIntImpl._fromInt(value as int);
   }
 
   factory _BigIntImpl._fromInt(int value) {
@@ -389,28 +389,28 @@ class _BigIntImpl implements BigInt {
       // positive.
       if (value == _minInt) {
         digits[1] = 0x80000000;
-        return new _BigIntImpl._(true, 2, digits);
+        return _BigIntImpl._(true, 2, digits);
       }
       value = -value;
     }
     if (value < _digitBase) {
       digits[0] = value;
-      return new _BigIntImpl._(isNegative, 1, digits);
+      return _BigIntImpl._(isNegative, 1, digits);
     }
     digits[0] = value & _digitMask;
     digits[1] = value >> _digitBits;
-    return new _BigIntImpl._(isNegative, 2, digits);
+    return _BigIntImpl._(isNegative, 2, digits);
   }
 
   /// An 8-byte Uint8List we can reuse for [_fromDouble] to avoid generating
   /// garbage.
-  static final Uint8List _bitsForFromDouble = new Uint8List(8);
+  static final Uint8List _bitsForFromDouble = Uint8List(8);
 
   factory _BigIntImpl._fromDouble(double value) {
     const int exponentBias = 1075;
 
     if (value.isNaN || value.isInfinite) {
-      throw new ArgumentError("Value must be finite: $value");
+      throw ArgumentError("Value must be finite: $value");
     }
     bool isNegative = value < 0;
     if (isNegative) value = -value;
@@ -436,7 +436,7 @@ class _BigIntImpl implements BigInt {
     unshiftedDigits[1] =
         ((0x10 | (bits[6] & 0xF)) << 16) + (bits[5] << 8) + bits[4];
 
-    var unshiftedBig = new _BigIntImpl._normalized(false, 2, unshiftedDigits);
+    var unshiftedBig = _BigIntImpl._normalized(false, 2, unshiftedDigits);
     _BigIntImpl absResult = unshiftedBig;
     if (exponent < 0) {
       absResult = unshiftedBig >> -exponent;
@@ -455,7 +455,7 @@ class _BigIntImpl implements BigInt {
    */
   _BigIntImpl operator -() {
     if (_used == 0) return this;
-    return new _BigIntImpl._(!_isNegative, _used, _digits);
+    return _BigIntImpl._(!_isNegative, _used, _digits);
   }
 
   /**
@@ -477,7 +477,7 @@ class _BigIntImpl implements BigInt {
     for (int i = used - 1; i >= 0; i--) {
       resultDigits[i + n] = digits[i];
     }
-    return new _BigIntImpl._(_isNegative, resultUsed, resultDigits);
+    return _BigIntImpl._(_isNegative, resultUsed, resultDigits);
   }
 
   /// Same as [_dlShift] but works on the decomposed big integers.
@@ -526,7 +526,7 @@ class _BigIntImpl implements BigInt {
     for (var i = n; i < used; i++) {
       resultDigits[i - n] = digits[i];
     }
-    final result = new _BigIntImpl._(_isNegative, resultUsed, resultDigits);
+    final result = _BigIntImpl._(_isNegative, resultUsed, resultDigits);
     if (_isNegative) {
       // Round down if any bit was shifted out.
       for (var i = 0; i < n; i++) {
@@ -607,7 +607,7 @@ class _BigIntImpl implements BigInt {
    */
   _BigIntImpl operator <<(int shiftAmount) {
     if (shiftAmount < 0) {
-      throw new ArgumentError("shift-amount must be positive $shiftAmount");
+      throw ArgumentError("shift-amount must be positive $shiftAmount");
     }
     if (_isZero) return this;
     final digitShift = shiftAmount ~/ _digitBits;
@@ -620,7 +620,7 @@ class _BigIntImpl implements BigInt {
     // The 64-bit intrinsic requires one extra pair to work with.
     var resultDigits = _newDigits(resultUsed + 1);
     _lsh(_digits, _used, shiftAmount, resultDigits);
-    return new _BigIntImpl._(_isNegative, resultUsed, resultDigits);
+    return _BigIntImpl._(_isNegative, resultUsed, resultDigits);
   }
 
   /// resultDigits[0..resultUsed-1] = xDigits[0..xUsed-1] << n.
@@ -690,7 +690,7 @@ class _BigIntImpl implements BigInt {
    */
   _BigIntImpl operator >>(int shiftAmount) {
     if (shiftAmount < 0) {
-      throw new ArgumentError("shift-amount must be positive $shiftAmount");
+      throw ArgumentError("shift-amount must be positive $shiftAmount");
     }
     if (_isZero) return this;
     final digitShift = shiftAmount ~/ _digitBits;
@@ -707,7 +707,7 @@ class _BigIntImpl implements BigInt {
     // The 64-bit intrinsic requires one extra pair to work with.
     final resultDigits = _newDigits(resultUsed + 1);
     _rsh(digits, used, shiftAmount, resultDigits);
-    final result = new _BigIntImpl._(_isNegative, resultUsed, resultDigits);
+    final result = _BigIntImpl._(_isNegative, resultUsed, resultDigits);
     if (_isNegative) {
       // Round down if any bit was shifted out.
       if ((digits[digitShift] & ((1 << bitShift) - 1)) != 0) {
@@ -867,7 +867,7 @@ class _BigIntImpl implements BigInt {
     var resultUsed = used + 1;
     var resultDigits = _newDigits(resultUsed);
     _absAdd(_digits, used, other._digits, otherUsed, resultDigits);
-    return new _BigIntImpl._(isNegative, resultUsed, resultDigits);
+    return _BigIntImpl._(isNegative, resultUsed, resultDigits);
   }
 
   /// Returns `abs(this) - abs(other)` with sign set according to [isNegative].
@@ -886,7 +886,7 @@ class _BigIntImpl implements BigInt {
     }
     var resultDigits = _newDigits(used);
     _absSub(_digits, used, other._digits, otherUsed, resultDigits);
-    return new _BigIntImpl._(isNegative, used, resultDigits);
+    return _BigIntImpl._(isNegative, used, resultDigits);
   }
 
   /// Returns `abs(this) & abs(other)` with sign set according to [isNegative].
@@ -898,7 +898,7 @@ class _BigIntImpl implements BigInt {
     for (var i = 0; i < resultUsed; i++) {
       resultDigits[i] = digits[i] & otherDigits[i];
     }
-    return new _BigIntImpl._(isNegative, resultUsed, resultDigits);
+    return _BigIntImpl._(isNegative, resultUsed, resultDigits);
   }
 
   /// Returns `abs(this) &~ abs(other)` with sign set according to [isNegative].
@@ -914,7 +914,7 @@ class _BigIntImpl implements BigInt {
     for (var i = m; i < resultUsed; i++) {
       resultDigits[i] = digits[i];
     }
-    return new _BigIntImpl._(isNegative, resultUsed, resultDigits);
+    return _BigIntImpl._(isNegative, resultUsed, resultDigits);
   }
 
   /// Returns `abs(this) | abs(other)` with sign set according to [isNegative].
@@ -940,7 +940,7 @@ class _BigIntImpl implements BigInt {
     for (var i = m; i < resultUsed; i++) {
       resultDigits[i] = lDigits[i];
     }
-    return new _BigIntImpl._(isNegative, resultUsed, resultDigits);
+    return _BigIntImpl._(isNegative, resultUsed, resultDigits);
   }
 
   /// Returns `abs(this) ^ abs(other)` with sign set according to [isNegative].
@@ -966,7 +966,7 @@ class _BigIntImpl implements BigInt {
     for (var i = m; i < resultUsed; i++) {
       resultDigits[i] = lDigits[i];
     }
-    return new _BigIntImpl._(isNegative, resultUsed, resultDigits);
+    return _BigIntImpl._(isNegative, resultUsed, resultDigits);
   }
 
   /**
@@ -1283,7 +1283,7 @@ class _BigIntImpl implements BigInt {
     while (i < otherUsed) {
       i += _mulAdd(otherDigits, i, digits, 0, resultDigits, i, used);
     }
-    return new _BigIntImpl._(
+    return _BigIntImpl._(
       _isNegative != other._isNegative,
       resultUsed,
       resultDigits,
@@ -1396,7 +1396,7 @@ class _BigIntImpl implements BigInt {
       _lastQuoRemUsed,
       lastQuo_used,
     );
-    var quo = new _BigIntImpl._(false, lastQuo_used, quo_digits);
+    var quo = _BigIntImpl._(false, lastQuo_used, quo_digits);
     if ((_isNegative != other._isNegative) && (quo._used > 0)) {
       quo = -quo;
     }
@@ -1419,7 +1419,7 @@ class _BigIntImpl implements BigInt {
       _lastRemUsed,
       _lastRemUsed,
     );
-    var rem = new _BigIntImpl._(false, _lastRemUsed, remDigits);
+    var rem = _BigIntImpl._(false, _lastRemUsed, remDigits);
     if (_lastRem_nsh > 0) {
       rem = rem >> _lastRem_nsh; // Denormalize remainder.
     }
@@ -1869,7 +1869,7 @@ class _BigIntImpl implements BigInt {
 
   _BigIntImpl pow(int exponent) {
     if (exponent < 0) {
-      throw new ArgumentError("Exponent must not be negative: $exponent");
+      throw ArgumentError("Exponent must not be negative: $exponent");
     }
     if (exponent == 0) return one;
 
@@ -1899,10 +1899,10 @@ class _BigIntImpl implements BigInt {
     final exponent = _ensureSystemBigInt(bigExponent, 'bigExponent');
     final modulus = _ensureSystemBigInt(bigModulus, 'bigModulus');
     if (exponent._isNegative) {
-      throw new ArgumentError("exponent must be positive: $exponent");
+      throw ArgumentError("exponent must be positive: $exponent");
     }
     if (modulus <= zero) {
-      throw new ArgumentError("modulus must be strictly positive: $modulus");
+      throw ArgumentError("modulus must be strictly positive: $modulus");
     }
     if (exponent._isZero) return one;
 
@@ -1912,8 +1912,8 @@ class _BigIntImpl implements BigInt {
     if (cannotUseMontgomery || exponentBitlen < 64) {
       _BigIntReduction z =
           (cannotUseMontgomery || exponentBitlen < 8)
-              ? new _BigIntClassicReduction(modulus)
-              : new _BigIntMontgomeryReduction(modulus);
+              ? _BigIntClassicReduction(modulus)
+              : _BigIntMontgomeryReduction(modulus);
       var resultDigits = _newDigits(2 * z._normModulusUsed + 2);
       var result2Digits = _newDigits(2 * z._normModulusUsed + 2);
       var gDigits = _newDigits(z._normModulusUsed);
@@ -1958,12 +1958,12 @@ class _BigIntImpl implements BigInt {
       k = 5;
     else
       k = 6;
-    _BigIntReduction z = new _BigIntMontgomeryReduction(modulus);
+    _BigIntReduction z = _BigIntMontgomeryReduction(modulus);
     var n = 3;
     final int k1 = k - 1;
     final km = (1 << k) - 1;
-    List gDigits = new List.filled(km + 1, null);
-    List gUsed = new List.filled(km + 1, null);
+    List gDigits = List.filled(km + 1, null);
+    List gUsed = List.filled(km + 1, null);
     gDigits[1] = _newDigits(z._normModulusUsed);
     gUsed[1] = z._convert(this, gDigits[1]);
     if (k > 1) {
@@ -2076,14 +2076,14 @@ class _BigIntImpl implements BigInt {
     if (inv) {
       if ((yUsed == 1) && (yDigits[0] == 1)) return one;
       if ((yUsed == 0) || (yDigits[0].isEven && xDigits[0].isEven)) {
-        throw new Exception("Not coprime");
+        throw Exception("Not coprime");
       }
     } else {
       if (x._isZero) {
-        throw new ArgumentError.value(0, "this", "must not be zero");
+        throw ArgumentError.value(0, "this", "must not be zero");
       }
       if (y._isZero) {
-        throw new ArgumentError.value(0, "other", "must not be zero");
+        throw ArgumentError.value(0, "other", "must not be zero");
       }
       if (((xUsed == 1) && (xDigits[0] == 1)) ||
           ((yUsed == 1) && (yDigits[0] == 1)))
@@ -2284,13 +2284,13 @@ class _BigIntImpl implements BigInt {
       if (shiftAmount > 0) {
         maxUsed = _lShiftDigits(vDigits, maxUsed, shiftAmount, vDigits);
       }
-      return new _BigIntImpl._(false, maxUsed, vDigits);
+      return _BigIntImpl._(false, maxUsed, vDigits);
     }
     // No inverse if v != 1.
     var i = maxUsed - 1;
     while ((i > 0) && (vDigits[i] == 0)) --i;
     if ((i != 0) || (vDigits[0] != 1)) {
-      throw new Exception("Not coprime");
+      throw Exception("Not coprime");
     }
 
     if (dIsNegative) {
@@ -2309,7 +2309,7 @@ class _BigIntImpl implements BigInt {
         _absSub(dDigits, abcdUsed, xDigits, maxUsed, dDigits);
       }
     }
-    return new _BigIntImpl._(false, maxUsed, dDigits);
+    return _BigIntImpl._(false, maxUsed, dDigits);
   }
 
   /**
@@ -2324,7 +2324,7 @@ class _BigIntImpl implements BigInt {
   _BigIntImpl modInverse(BigInt bigInt) {
     final modulus = _ensureSystemBigInt(bigInt, 'bigInt');
     if (modulus <= zero) {
-      throw new ArgumentError("Modulus must be strictly positive: $modulus");
+      throw ArgumentError("Modulus must be strictly positive: $modulus");
     }
     if (modulus == one) return zero;
     var tmp = this;
@@ -2464,7 +2464,7 @@ class _BigIntImpl implements BigInt {
     if (_isZero) return 0.0;
 
     // We fill the 53 bits little-endian.
-    var resultBits = new Uint8List(8);
+    var resultBits = Uint8List(8);
 
     var length = _digitBits * (_used - 1) + _digits[_used - 1].bitLength;
     if (length > maxDoubleExponent + 53) {
@@ -2611,7 +2611,7 @@ class _BigIntImpl implements BigInt {
    * The [radix] argument must be an integer in the range 2 to 36.
    */
   String toRadixString(int radix) {
-    if (radix < 2 || radix > 36) throw new RangeError.range(radix, 2, 36);
+    if (radix < 2 || radix > 36) throw RangeError.range(radix, 2, 36);
 
     if (_used == 0) return "0";
 
@@ -2623,7 +2623,7 @@ class _BigIntImpl implements BigInt {
 
     if (radix == 16) return _toHexString();
 
-    var base = new _BigIntImpl._fromInt(radix);
+    var base = _BigIntImpl._fromInt(radix);
     var reversedDigitCodeUnits = <int>[];
     var rest = this.abs();
     while (!rest._isZero) {
@@ -2631,7 +2631,7 @@ class _BigIntImpl implements BigInt {
       rest = rest ~/ base;
       reversedDigitCodeUnits.add(_toRadixCodeUnit(digit));
     }
-    var digitString = new String.fromCharCodes(reversedDigitCodeUnits.reversed);
+    var digitString = String.fromCharCodes(reversedDigitCodeUnits.reversed);
     if (_isNegative) return "-" + digitString;
     return digitString;
   }
@@ -2654,7 +2654,7 @@ class _BigIntImpl implements BigInt {
       const _dash = 45;
       chars.add(_dash);
     }
-    return new String.fromCharCodes(chars.reversed);
+    return String.fromCharCodes(chars.reversed);
   }
 
   static _BigIntImpl _ensureSystemBigInt(BigInt bigInt, String parameterName) {
@@ -2829,7 +2829,7 @@ class _BigIntMontgomeryReduction implements _BigIntReduction {
       resultDigits[i] = xDigits[i];
     }
     var resultUsed = _reduce(resultDigits, xUsed);
-    return new _BigIntImpl._(false, resultUsed, resultDigits);
+    return _BigIntImpl._(false, resultUsed, resultDigits);
   }
 
   // x = x/R mod _modulus.
@@ -3002,7 +3002,7 @@ class _BigIntClassicReduction implements _BigIntReduction {
   }
 
   _BigIntImpl _revert(Uint32List xDigits, int xUsed) {
-    return new _BigIntImpl._(false, xUsed, xDigits);
+    return _BigIntImpl._(false, xUsed, xDigits);
   }
 
   int _reduce(Uint32List xDigits, int xUsed) {

sdk/lib/_internal/vm_shared/lib/collection_patch.dart

@@ -18,13 +18,13 @@ class HashMap<K, V> {
     if (isValidKey == null) {
       if (hashCode == null) {
         if (equals == null) {
-          return new _HashMap<K, V>();
+          return _HashMap<K, V>();
         }
         hashCode = _defaultHashCode;
       } else {
         if (identical(identityHashCode, hashCode) &&
             identical(identical, equals)) {
-          return new _IdentityHashMap<K, V>();
+          return _IdentityHashMap<K, V>();
         }
         equals ??= _defaultEquals;
       }
@@ -32,11 +32,11 @@ class HashMap<K, V> {
       hashCode ??= _defaultHashCode;
       equals ??= _defaultEquals;
     }
-    return new _CustomHashMap<K, V>(equals, hashCode, isValidKey);
+    return _CustomHashMap<K, V>(equals, hashCode, isValidKey);
   }
 
   @patch
-  factory HashMap.identity() => new _IdentityHashMap<K, V>();
+  factory HashMap.identity() => _IdentityHashMap<K, V>();
 
   Set<K> _newKeySet();
 }
@@ -54,8 +54,8 @@ base class _HashMap<K, V> extends MapBase<K, V> implements HashMap<K, V> {
   bool get isEmpty => _elementCount == 0;
   bool get isNotEmpty => _elementCount != 0;
 
-  Iterable<K> get keys => new _HashMapKeyIterable<K, V>(this);
-  Iterable<V> get values => new _HashMapValueIterable<K, V>(this);
+  Iterable<K> get keys => _HashMapKeyIterable<K, V>(this);
+  Iterable<V> get values => _HashMapValueIterable<K, V>(this);
 
   bool containsKey(Object? key) {
     final hashCode = key.hashCode;
@@ -149,7 +149,7 @@ base class _HashMap<K, V> extends MapBase<K, V> implements HashMap<K, V> {
       while (entry != null) {
         action(unsafeCast<K>(entry.key), unsafeCast<V>(entry.value));
         if (stamp != _modificationCount) {
-          throw new ConcurrentModificationError(this);
+          throw ConcurrentModificationError(this);
         }
         entry = entry.next;
       }
@@ -178,7 +178,7 @@ base class _HashMap<K, V> extends MapBase<K, V> implements HashMap<K, V> {
   }
 
   void clear() {
-    _buckets = new List.filled(_INITIAL_CAPACITY, null);
+    _buckets = List.filled(_INITIAL_CAPACITY, null);
     if (_elementCount > 0) {
       _elementCount = 0;
       _modificationCount = (_modificationCount + 1) & _MODIFICATION_COUNT_MASK;
@@ -205,7 +205,7 @@ base class _HashMap<K, V> extends MapBase<K, V> implements HashMap<K, V> {
     V value,
     int hashCode,
   ) {
-    final entry = new _HashMapEntry(key, value, hashCode, buckets[index]);
+    final entry = _HashMapEntry(key, value, hashCode, buckets[index]);
     buckets[index] = entry;
     final newElements = _elementCount + 1;
     _elementCount = newElements;
@@ -219,7 +219,7 @@ base class _HashMap<K, V> extends MapBase<K, V> implements HashMap<K, V> {
     final oldBuckets = _buckets;
     final oldLength = oldBuckets.length;
     final newLength = oldLength << 1;
-    final newBuckets = new List<_HashMapEntry?>.filled(newLength, null);
+    final newBuckets = List<_HashMapEntry?>.filled(newLength, null);
     for (int i = 0; i < oldLength; i++) {
       var entry = oldBuckets[i];
       while (entry != null) {
@@ -256,7 +256,7 @@ base class _HashMap<K, V> extends MapBase<K, V> implements HashMap<K, V> {
     }
   }
 
-  Set<K> _newKeySet() => new _HashSet<K>();
+  Set<K> _newKeySet() => _HashSet<K>();
 }
 
 base class _CustomHashMap<K, V> extends _HashMap<K, V> {
@@ -364,7 +364,7 @@ base class _CustomHashMap<K, V> extends _HashMap<K, V> {
     return null;
   }
 
-  Set<K> _newKeySet() => new _CustomHashSet<K>(_equals, _hashCode, _validKey);
+  Set<K> _newKeySet() => _CustomHashSet<K>(_equals, _hashCode, _validKey);
 }
 
 base class _IdentityHashMap<K, V> extends _HashMap<K, V> {
@@ -475,7 +475,7 @@ base class _IdentityHashMap<K, V> extends _HashMap<K, V> {
     }
   }
 
-  Set<K> _newKeySet() => new _IdentityHashSet<K>();
+  Set<K> _newKeySet() => _IdentityHashSet<K>();
 }
 
 class _HashMapEntry {
@@ -497,7 +497,7 @@ abstract class _HashMapIterable<K, V, E>
 
 class _HashMapKeyIterable<K, V> extends _HashMapIterable<K, V, K> {
   _HashMapKeyIterable(_HashMap<K, V> map) : super(map);
-  Iterator<K> get iterator => new _HashMapKeyIterator<K, V>(_map);
+  Iterator<K> get iterator => _HashMapKeyIterator<K, V>(_map);
   bool contains(Object? key) => _map.containsKey(key);
   void forEach(void action(K key)) {
     _map.forEach((K key, _) {
@@ -510,7 +510,7 @@ class _HashMapKeyIterable<K, V> extends _HashMapIterable<K, V, K> {
 
 class _HashMapValueIterable<K, V> extends _HashMapIterable<K, V, V> {
   _HashMapValueIterable(_HashMap<K, V> map) : super(map);
-  Iterator<V> get iterator => new _HashMapValueIterator<K, V>(_map);
+  Iterator<V> get iterator => _HashMapValueIterator<K, V>(_map);
   bool contains(Object? value) => _map.containsValue(value);
   void forEach(void action(V value)) {
     _map.forEach((_, V value) {
@@ -530,7 +530,7 @@ abstract class _HashMapIterator<K, V, E> implements Iterator<E> {
 
   bool moveNext() {
     if (_stamp != _map._modificationCount) {
-      throw new ConcurrentModificationError(_map);
+      throw ConcurrentModificationError(_map);
     }
     var entry = _entry;
     if (entry != null) {
@@ -577,13 +577,13 @@ class HashSet<E> {
     if (isValidKey == null) {
       if (hashCode == null) {
         if (equals == null) {
-          return new _HashSet<E>();
+          return _HashSet<E>();
         }
         hashCode = _defaultHashCode;
       } else {
         if (identical(identityHashCode, hashCode) &&
             identical(identical, equals)) {
-          return new _IdentityHashSet<E>();
+          return _IdentityHashSet<E>();
         }
         equals ??= _defaultEquals;
       }
@@ -591,11 +591,11 @@ class HashSet<E> {
       hashCode ??= _defaultHashCode;
       equals ??= _defaultEquals;
     }
-    return new _CustomHashSet<E>(equals, hashCode, isValidKey);
+    return _CustomHashSet<E>(equals, hashCode, isValidKey);
   }
 
   @patch
-  factory HashSet.identity() => new _IdentityHashSet<E>();
+  factory HashSet.identity() => _IdentityHashSet<E>();
 }
 
 base class _HashSet<E> extends _SetBase<E> implements HashSet<E> {
@@ -608,11 +608,11 @@ base class _HashSet<E> extends _SetBase<E> implements HashSet<E> {
   bool _equals(Object? e1, Object? e2) => e1 == e2;
   int _hashCode(Object? e) => e.hashCode;
 
-  static Set<R> _newEmpty<R>() => new _HashSet<R>();
+  static Set<R> _newEmpty<R>() => _HashSet<R>();
 
   // Iterable.
 
-  Iterator<E> get iterator => new _HashSetIterator<E>(this);
+  Iterator<E> get iterator => _HashSetIterator<E>(this);
 
   int get length => _elementCount;
 
@@ -726,7 +726,7 @@ base class _HashSet<E> extends _SetBase<E> implements HashSet<E> {
         int modificationCount = _modificationCount;
         bool testResult = test(entry.key);
         if (modificationCount != _modificationCount) {
-          throw new ConcurrentModificationError(this);
+          throw ConcurrentModificationError(this);
         }
         if (testResult == removeMatching) {
           final next = entry.remove();
@@ -764,7 +764,7 @@ base class _HashSet<E> extends _SetBase<E> implements HashSet<E> {
   }
 
   void _addEntry(E key, int hashCode, int index) {
-    _buckets[index] = new _HashSetEntry<E>(key, hashCode, _buckets[index]);
+    _buckets[index] = _HashSetEntry<E>(key, hashCode, _buckets[index]);
     int newElements = _elementCount + 1;
     _elementCount = newElements;
     int length = _buckets.length;
@@ -792,16 +792,16 @@ base class _HashSet<E> extends _SetBase<E> implements HashSet<E> {
     _buckets = newBuckets;
   }
 
-  HashSet<E> _newSet() => new _HashSet<E>();
-  HashSet<R> _newSimilarSet<R>() => new _HashSet<R>();
+  HashSet<E> _newSet() => _HashSet<E>();
+  HashSet<R> _newSimilarSet<R>() => _HashSet<R>();
 }
 
 base class _IdentityHashSet<E> extends _HashSet<E> {
   int _hashCode(Object? e) => identityHashCode(e);
   bool _equals(Object? e1, Object? e2) => identical(e1, e2);
 
-  HashSet<E> _newSet() => new _IdentityHashSet<E>();
-  HashSet<R> _newSimilarSet<R>() => new _IdentityHashSet<R>();
+  HashSet<E> _newSet() => _IdentityHashSet<E>();
+  HashSet<R> _newSimilarSet<R>() => _IdentityHashSet<R>();
 }
 
 base class _CustomHashSet<E> extends _HashSet<E> {
@@ -844,8 +844,8 @@ base class _CustomHashSet<E> extends _HashSet<E> {
   bool _equals(Object? e1, Object? e2) => _equality(e1 as E, e2 as E);
   int _hashCode(Object? e) => _hasher(e as E);
 
-  HashSet<E> _newSet() => new _CustomHashSet<E>(_equality, _hasher, _validKey);
-  HashSet<R> _newSimilarSet<R>() => new _HashSet<R>();
+  HashSet<E> _newSet() => _CustomHashSet<E>(_equality, _hasher, _validKey);
+  HashSet<R> _newSimilarSet<R>() => _HashSet<R>();
 }
 
 class _HashSetEntry<E> {
@@ -872,7 +872,7 @@ class _HashSetIterator<E> implements Iterator<E> {
 
   bool moveNext() {
     if (_modificationCount != _set._modificationCount) {
-      throw new ConcurrentModificationError(_set);
+      throw ConcurrentModificationError(_set);
     }
     var localNext = _next;
     if (localNext != null) {

sdk/lib/_internal/vm_shared/lib/compact_hash.dart

@@ -417,7 +417,7 @@ base class _ConstMap<K, V> extends _HashVMImmutableBase
         _ImmutableLinkedHashMapMixin<K, V>
     implements LinkedHashMap<K, V> {
   factory _ConstMap._uninstantiable() {
-    throw new UnsupportedError("_ConstMap can only be allocated by the VM");
+    throw UnsupportedError("_ConstMap can only be allocated by the VM");
   }
 }
 
@@ -441,7 +441,7 @@ mixin _ImmutableLinkedHashMapMixin<K, V>
     final size = _roundUpToPowerOfTwo(
       max(_data.length, _HashBase._INITIAL_INDEX_SIZE),
     );
-    final newIndex = new Uint32List(size);
+    final newIndex = Uint32List(size);
     final hashMask = _HashBase._indexSizeToHashMask(size);
     assert(_hashMask == hashMask);
 
@@ -525,9 +525,9 @@ mixin _LinkedHashMapMixin<K, V> on _HashBase, _EqualsAndHashCode {
     }
     assert(size & (size - 1) == 0);
     assert(_HashBase._UNUSED_PAIR == 0);
-    _index = new Uint32List(size);
+    _index = Uint32List(size);
     _hashMask = hashMask;
-    _data = new List.filled(size, null);
+    _data = List.filled(size, null);
     _usedData = 0;
     _deletedKeys = 0;
     if (oldData != null) {
@@ -556,9 +556,9 @@ mixin _LinkedHashMapMixin<K, V> on _HashBase, _EqualsAndHashCode {
 
     assert(size & (size - 1) == 0);
     assert(_HashBase._UNUSED_PAIR == 0);
-    _index = new Uint32List(size);
+    _index = Uint32List(size);
     _hashMask = hashMask;
-    _data = new List.filled(size, null);
+    _data = List.filled(size, null);
     _usedData = 0;
     _deletedKeys = 0;
     for (int i = 0; i < keyValuePairs.length; i += 2) {
@@ -569,8 +569,7 @@ mixin _LinkedHashMapMixin<K, V> on _HashBase, _EqualsAndHashCode {
   }
 
   void _regenerateIndex() {
-    _index =
-        _data.length == 0 ? _uninitializedIndex : new Uint32List(_data.length);
+    _index = _data.length == 0 ? _uninitializedIndex : Uint32List(_data.length);
     assert(_hashMask == _HashBase._UNINITIALIZED_HASH_MASK);
     _hashMask = _HashBase._indexSizeToHashMask(_index.length);
     final int tmpUsed = _usedData;
@@ -1038,9 +1037,9 @@ mixin _LinkedHashSetMixin<E> on _HashBase, _EqualsAndHashCode {
       size = _HashBase._INITIAL_INDEX_SIZE;
       hashMask = _HashBase._indexSizeToHashMask(size);
     }
-    _index = new Uint32List(size);
+    _index = Uint32List(size);
     _hashMask = hashMask;
-    _data = new List.filled(size >> 1, null);
+    _data = List.filled(size >> 1, null);
     _usedData = 0;
     _deletedKeys = 0;
     if (oldData != null) {
@@ -1154,7 +1153,7 @@ mixin _LinkedHashSetMixin<E> on _HashBase, _EqualsAndHashCode {
     final size = _roundUpToPowerOfTwo(
       max(_data.length, _HashBase._INITIAL_INDEX_SIZE),
     );
-    _index = _data.length == 0 ? _uninitializedIndex : new Uint32List(size);
+    _index = _data.length == 0 ? _uninitializedIndex : Uint32List(size);
     assert(_hashMask == _HashBase._UNINITIALIZED_HASH_MASK);
     _hashMask = _HashBase._indexSizeToHashMask(_index.length);
     _rehash();
@@ -1208,7 +1207,7 @@ base class _ConstSet<E> extends _HashVMImmutableBase
         _ImmutableLinkedHashSetMixin<E>
     implements LinkedHashSet<E> {
   factory _ConstSet._uninstantiable() {
-    throw new UnsupportedError("_ConstSet can only be allocated by the VM");
+    throw UnsupportedError("_ConstSet can only be allocated by the VM");
   }
 
   Set<R> cast<R>() => Set.castFrom<E, R>(this, newSet: _newEmpty);
@@ -1239,7 +1238,7 @@ mixin _ImmutableLinkedHashSetMixin<E>
     final size = _roundUpToPowerOfTwo(
       max(_data.length * 2, _HashBase._INITIAL_INDEX_SIZE),
     );
-    final index = new Uint32List(size);
+    final index = Uint32List(size);
     final hashMask = _HashBase._indexSizeToHashMask(size);
     assert(_hashMask == hashMask);
 

sdk/lib/_internal/vm_shared/lib/integers_patch.dart

@@ -48,7 +48,7 @@ class int {
 
   @patch
   static int parse(String source, {int? radix, int onError(String source)?}) {
-    if (source == null) throw new ArgumentError("The source must not be null");
+    if (source == null) throw ArgumentError("The source must not be null");
     if (source.isEmpty) {
       return _handleFormatError(onError, source, 0, radix, null) as int;
     }
@@ -57,7 +57,7 @@ class int {
       int? result = _tryParseSmi(source, 0, source.length - 1);
       if (result != null) return result;
     } else if (radix < 2 || radix > 36) {
-      throw new RangeError("Radix $radix not in range 2..36");
+      throw RangeError("Radix $radix not in range 2..36");
     }
     // Split here so improve odds of parse being inlined and the checks omitted.
     return _parse(unsafeCast<_StringBase>(source), radix, onError) as int;
@@ -106,14 +106,14 @@ class int {
 
   @patch
   static int? tryParse(String source, {int? radix}) {
-    if (source == null) throw new ArgumentError("The source must not be null");
+    if (source == null) throw ArgumentError("The source must not be null");
     if (source.isEmpty) return null;
     if (radix == null || radix == 10) {
       // Try parsing immediately, without trimming whitespace.
       int? result = _tryParseSmi(source, 0, source.length - 1);
       if (result != null) return result;
     } else if (radix < 2 || radix > 36) {
-      throw new RangeError("Radix $radix not in range 2..36");
+      throw RangeError("Radix $radix not in range 2..36");
     }
     return _parse(unsafeCast<_StringBase>(source), radix, _kNull);
   }
@@ -129,12 +129,12 @@ class int {
   ) {
     if (onError != null) return onError(source);
     if (message != null) {
-      throw new FormatException(message, source, index);
+      throw FormatException(message, source, index);
     }
     if (radix == null) {
-      throw new FormatException("Invalid number", source, index);
+      throw FormatException("Invalid number", source, index);
     }
-    throw new FormatException("Invalid radix-$radix number", source, index);
+    throw FormatException("Invalid radix-$radix number", source, index);
   }
 
   static int? _parseRadix(
@@ -254,7 +254,7 @@ class int {
   // For each radix, 2-36, how many digits are guaranteed to fit in a smi,
   // and magnitude of such a block (radix ** digit-count).
   // 32-bit limit/multiplier at (radix - 2)*4, 64-bit limit at (radix-2)*4+2
-  static const _PARSE_LIMITS = const [
+  static const _PARSE_LIMITS = [
     30, 1073741824, 62, 4611686018427387904, // radix: 2
     18, 387420489, 39, 4052555153018976267,
     15, 1073741824, 30, 1152921504606846976,
@@ -295,11 +295,8 @@ class int {
   static const _maxInt64 = 0x7fffffffffffffff;
   static const _minInt64 = -0x8000000000000000;
 
-  static const _int64UnsignedOverflowLimits = const [0xfffffffff, 0xf];
-  static const _int64UnsignedSmiOverflowLimits = const [
-    0xfffffff,
-    0xfffffffffffffff,
-  ];
+  static const _int64UnsignedOverflowLimits = [0xfffffffff, 0xf];
+  static const _int64UnsignedSmiOverflowLimits = [0xfffffff, 0xfffffffffffffff];
 
   /// Calculation of the expression
   ///
@@ -316,7 +313,7 @@ class int {
   /// * `[tableIndex*2 + 1]` = negative limit for result
   /// * `[tableIndex*2 + 2]` = limit for smi if result is exactly at positive limit
   /// * `[tableIndex*2 + 3]` = limit for smi if result is exactly at negative limit
-  static final Int64List _int64OverflowLimits = new Int64List(
+  static final Int64List _int64OverflowLimits = Int64List(
     _PARSE_LIMITS.length * 2,
   );
 

sdk/lib/_internal/vm_shared/lib/map_patch.dart

@@ -15,7 +15,7 @@ class Map<K, V> {
   // The values are at position 2*n+1 and are not yet type checked.
   @pragma("vm:entry-point", "call")
   factory Map._fromLiteral(List elements) {
-    var map = new LinkedHashMap<K, V>();
+    var map = LinkedHashMap<K, V>();
     var len = elements.length;
     for (int i = 1; i < len; i += 2) {
       map[elements[i - 1]] = elements[i];
@@ -25,11 +25,11 @@ class Map<K, V> {
 
   @patch
   factory Map.unmodifiable(Map other) {
-    return new UnmodifiableMapView<K, V>(new Map<K, V>.from(other));
+    return UnmodifiableMapView<K, V>(Map<K, V>.from(other));
   }
 
   @patch
-  factory Map() => new LinkedHashMap<K, V>();
+  factory Map() => LinkedHashMap<K, V>();
 }
 
 // Used by Dart_MapContainsKey.

sdk/lib/_internal/vm_shared/lib/string_buffer_patch.dart

@@ -77,7 +77,7 @@ class StringBuffer {
   void writeCharCode(int charCode) {
     if (charCode <= 0xFFFF) {
       if (charCode < 0) {
-        throw new RangeError.range(charCode, 0, 0x10FFFF);
+        throw RangeError.range(charCode, 0, 0x10FFFF);
       }
       _ensureCapacity(1);
       final localBuffer = _buffer!;
@@ -85,7 +85,7 @@ class StringBuffer {
       _bufferCodeUnitMagnitude |= charCode;
     } else {
       if (charCode > 0x10FFFF) {
-        throw new RangeError.range(charCode, 0, 0x10FFFF);
+        throw RangeError.range(charCode, 0, 0x10FFFF);
       }
       _ensureCapacity(2);
       int bits = charCode - 0x10000;
@@ -140,7 +140,7 @@ class StringBuffer {
   void _ensureCapacity(int n) {
     final localBuffer = _buffer;
     if (localBuffer == null) {
-      _buffer = new Uint16List(_BUFFER_SIZE);
+      _buffer = Uint16List(_BUFFER_SIZE);
     } else if (_bufferPosition + n > localBuffer.length) {
       _consumeBuffer();
     }
@@ -171,7 +171,7 @@ class StringBuffer {
 
     if (localParts == null) {
       // Empirically this is a good capacity to minimize total bytes allocated.
-      _parts = new _GrowableList.withCapacity(10)..add(str);
+      _parts = _GrowableList.withCapacity(10)..add(str);
     } else {
       localParts.add(str);
       int partsSinceCompaction = localParts.length - _partsCompactionIndex;

sdk/lib/_internal/wasm/lib/boxed_double.dart

@@ -294,7 +294,7 @@ final class BoxedDouble implements double {
 
   num clamp(num lowerLimit, num upperLimit) {
     if (lowerLimit.compareTo(upperLimit) > 0) {
-      throw new ArgumentError(lowerLimit);
+      throw ArgumentError(lowerLimit);
     }
     if (lowerLimit.isNaN) return lowerLimit;
     if (this.compareTo(lowerLimit) < 0) return lowerLimit;

sdk/lib/_internal/wasm/lib/boxed_int.dart

@@ -274,7 +274,7 @@ final class BoxedInt implements int {
     }
     // Generic case involving doubles, and invalid integer ranges.
     if (lowerLimit.compareTo(upperLimit) > 0) {
-      throw new ArgumentError(lowerLimit);
+      throw ArgumentError(lowerLimit);
     }
     if (lowerLimit.isNaN) return lowerLimit;
     // Note that we don't need to care for -0.0 for the lower limit.
@@ -394,7 +394,7 @@ final class BoxedInt implements int {
     } while (u != 0);
     if (!inv) return v << s;
     if (v != 1) {
-      throw new Exception("Not coprime");
+      throw Exception("Not coprime");
     }
     if (d < 0) {
       d += x;
@@ -415,7 +415,7 @@ final class BoxedInt implements int {
     if (t.geU(m)) t %= m;
     if (t == 1) return 1;
     if ((t == 0) || (t.isEven && m.isEven)) {
-      throw new Exception("Not coprime");
+      throw Exception("Not coprime");
     }
     return _binaryGcd(m, t, true);
   }

sdk/lib/_internal/wasm/lib/compact_hash.dart

@@ -103,7 +103,7 @@ mixin _UnmodifiableSetMixin<E> implements LinkedHashSet<E> {
 /// field type nullable.
 @pragma("wasm:entry-point")
 final WasmArray<WasmI32> _uninitializedHashBaseIndex =
-    const WasmArray<WasmI32>.literal([const WasmI32(0)]);
+    const WasmArray<WasmI32>.literal([WasmI32(0)]);
 
 /// The object marking uninitialized [_HashFieldBase._data] fields.
 ///
@@ -312,9 +312,7 @@ base class _ConstMap<K, V> extends _HashFieldBase
         _ImmutableLinkedHashMapMixin<K, V>
     implements LinkedHashMap<K, V> {
   factory _ConstMap._uninstantiable() {
-    throw new UnsupportedError(
-      "_ConstMap can only be allocated by the compiler",
-    );
+    throw UnsupportedError("_ConstMap can only be allocated by the compiler");
   }
 }
 
@@ -1125,9 +1123,7 @@ base class _ConstSet<E> extends _HashFieldBase
         _ImmutableLinkedHashSetMixin<E>
     implements LinkedHashSet<E> {
   factory _ConstSet._uninstantiable() {
-    throw new UnsupportedError(
-      "_ConstSet can only be allocated by the compiler",
-    );
+    throw UnsupportedError("_ConstSet can only be allocated by the compiler");
   }
 
   Set<R> cast<R>() => Set.castFrom<E, R>(this, newSet: _newEmpty);

sdk/lib/_internal/wasm/lib/convert_patch.dart

@@ -2607,7 +2607,7 @@ class _Utf8Decoder {
 
   // This table is the Wasm array version of `_Utf8Decoder.transitionTable`,
   // refer to the original type for documentation of the values.
-  static const _transitionTable = const ImmutableWasmArray<WasmI8>.literal([
+  static const _transitionTable = ImmutableWasmArray<WasmI8>.literal([
     32, 0, 48, 58, 88, 69, 67, 67, 67, 67, 67, 78, 58, 108, 68, 98, 32, 0, //
     48, 58, 88, 69, 67, 67, 67, 67, 67, 78, 118, 108, 68, 98, 32, 0, 48, 58, //
     88, 69, 67, 67, 67, 67, 67, 78, 58, 108, 68, 98, 32, 65, 65, 65, 65, 65, //
@@ -2620,7 +2620,7 @@ class _Utf8Decoder {
 
   // This table is the Wasm array version of `_Utf8Decoder.typeTable`,
   // refer to the original type for documentation of the values.
-  static const _typeTable = const ImmutableWasmArray<WasmI8>.literal([
+  static const _typeTable = ImmutableWasmArray<WasmI8>.literal([
     65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, //
     65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, //
     65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, //

sdk/lib/_internal/wasm/lib/errors_patch.dart

@@ -274,7 +274,7 @@ class _DuplicatedFieldInitializerError extends Error {
 @patch
 class StateError {
   static _throwNew(String msg) {
-    throw new StateError(msg);
+    throw StateError(msg);
   }
 }
 

sdk/lib/_internal/wasm/lib/int_patch.dart

@@ -248,7 +248,7 @@ class int {
   }
 
   // For each radix, 2-36, how many digits are guaranteed to fit in an `int`.
-  static const _PARSE_LIMITS = const ImmutableWasmArray<WasmI64>.literal([
+  static const _PARSE_LIMITS = ImmutableWasmArray<WasmI64>.literal([
     0, // unused
     0, // unused
     63, // radix: 2

sdk/lib/_internal/wasm/lib/io_patch.dart

@@ -12,42 +12,42 @@ import 'dart:typed_data';
 class _Directory {
   @patch
   static _current(_Namespace namespace) {
-    throw new UnsupportedError("Directory._current");
+    throw UnsupportedError("Directory._current");
   }
 
   @patch
   static _setCurrent(_Namespace namespace, Uint8List path) {
-    throw new UnsupportedError("Directory_SetCurrent");
+    throw UnsupportedError("Directory_SetCurrent");
   }
 
   @patch
   static _createTemp(_Namespace namespace, Uint8List path) {
-    throw new UnsupportedError("Directory._createTemp");
+    throw UnsupportedError("Directory._createTemp");
   }
 
   @patch
   static String _systemTemp(_Namespace namespace) {
-    throw new UnsupportedError("Directory._systemTemp");
+    throw UnsupportedError("Directory._systemTemp");
   }
 
   @patch
   static _exists(_Namespace namespace, Uint8List path) {
-    throw new UnsupportedError("Directory._exists");
+    throw UnsupportedError("Directory._exists");
   }
 
   @patch
   static _create(_Namespace namespace, Uint8List path) {
-    throw new UnsupportedError("Directory._create");
+    throw UnsupportedError("Directory._create");
   }
 
   @patch
   static _deleteNative(_Namespace namespace, Uint8List path, bool recursive) {
-    throw new UnsupportedError("Directory._deleteNative");
+    throw UnsupportedError("Directory._deleteNative");
   }
 
   @patch
   static _rename(_Namespace namespace, Uint8List path, String newPath) {
-    throw new UnsupportedError("Directory._rename");
+    throw UnsupportedError("Directory._rename");
   }
 
   @patch
@@ -58,7 +58,7 @@ class _Directory {
     bool recursive,
     bool followLinks,
   ) {
-    throw new UnsupportedError("Directory._fillWithDirectoryListing");
+    throw UnsupportedError("Directory._fillWithDirectoryListing");
   }
 }
 
@@ -66,7 +66,7 @@ class _Directory {
 class _AsyncDirectoryListerOps {
   @patch
   factory _AsyncDirectoryListerOps(int pointer) {
-    throw new UnsupportedError("Directory._list");
+    throw UnsupportedError("Directory._list");
   }
 }
 
@@ -74,7 +74,7 @@ class _AsyncDirectoryListerOps {
 class _EventHandler {
   @patch
   static void _sendData(Object? sender, SendPort sendPort, int data) {
-    throw new UnsupportedError("EventHandler._sendData");
+    throw UnsupportedError("EventHandler._sendData");
   }
 }
 
@@ -82,7 +82,7 @@ class _EventHandler {
 class FileStat {
   @patch
   static _statSync(_Namespace namespace, String path) {
-    throw new UnsupportedError("FileStat.stat");
+    throw UnsupportedError("FileStat.stat");
   }
 }
 
@@ -94,17 +94,17 @@ class FileSystemEntity {
     Uint8List path,
     bool followLinks,
   ) {
-    throw new UnsupportedError("FileSystemEntity._getType");
+    throw UnsupportedError("FileSystemEntity._getType");
   }
 
   @patch
   static _identicalNative(_Namespace namespace, String path1, String path2) {
-    throw new UnsupportedError("FileSystemEntity._identical");
+    throw UnsupportedError("FileSystemEntity._identical");
   }
 
   @patch
   static _resolveSymbolicLinks(_Namespace namespace, Uint8List path) {
-    throw new UnsupportedError("FileSystemEntity._resolveSymbolicLinks");
+    throw UnsupportedError("FileSystemEntity._resolveSymbolicLinks");
   }
 }
 
@@ -112,17 +112,17 @@ class FileSystemEntity {
 class _File {
   @patch
   static _exists(_Namespace namespace, Uint8List path) {
-    throw new UnsupportedError("File._exists");
+    throw UnsupportedError("File._exists");
   }
 
   @patch
   static _create(_Namespace namespace, Uint8List path, bool exclusive) {
-    throw new UnsupportedError("File._create");
+    throw UnsupportedError("File._create");
   }
 
   @patch
   static _createLink(_Namespace namespace, Uint8List path, String target) {
-    throw new UnsupportedError("File._createLink");
+    throw UnsupportedError("File._createLink");
   }
 
   @patch
@@ -132,67 +132,67 @@ class _File {
 
   @patch
   static _linkTarget(_Namespace namespace, Uint8List path) {
-    throw new UnsupportedError("File._linkTarget");
+    throw UnsupportedError("File._linkTarget");
   }
 
   @patch
   static _deleteNative(_Namespace namespace, Uint8List path) {
-    throw new UnsupportedError("File._deleteNative");
+    throw UnsupportedError("File._deleteNative");
   }
 
   @patch
   static _deleteLinkNative(_Namespace namespace, Uint8List path) {
-    throw new UnsupportedError("File._deleteLinkNative");
+    throw UnsupportedError("File._deleteLinkNative");
   }
 
   @patch
   static _rename(_Namespace namespace, Uint8List oldPath, String newPath) {
-    throw new UnsupportedError("File._rename");
+    throw UnsupportedError("File._rename");
   }
 
   @patch
   static _renameLink(_Namespace namespace, Uint8List oldPath, String newPath) {
-    throw new UnsupportedError("File._renameLink");
+    throw UnsupportedError("File._renameLink");
   }
 
   @patch
   static _copy(_Namespace namespace, Uint8List oldPath, String newPath) {
-    throw new UnsupportedError("File._copy");
+    throw UnsupportedError("File._copy");
   }
 
   @patch
   static _lengthFromPath(_Namespace namespace, Uint8List path) {
-    throw new UnsupportedError("File._lengthFromPath");
+    throw UnsupportedError("File._lengthFromPath");
   }
 
   @patch
   static _lastModified(_Namespace namespace, Uint8List path) {
-    throw new UnsupportedError("File._lastModified");
+    throw UnsupportedError("File._lastModified");
   }
 
   @patch
   static _lastAccessed(_Namespace namespace, Uint8List path) {
-    throw new UnsupportedError("File._lastAccessed");
+    throw UnsupportedError("File._lastAccessed");
   }
 
   @patch
   static _setLastModified(_Namespace namespace, Uint8List path, int millis) {
-    throw new UnsupportedError("File._setLastModified");
+    throw UnsupportedError("File._setLastModified");
   }
 
   @patch
   static _setLastAccessed(_Namespace namespace, Uint8List path, int millis) {
-    throw new UnsupportedError("File._setLastAccessed");
+    throw UnsupportedError("File._setLastAccessed");
   }
 
   @patch
   static _open(_Namespace namespace, Uint8List path, int mode) {
-    throw new UnsupportedError("File._open");
+    throw UnsupportedError("File._open");
   }
 
   @patch
   static int _openStdio(int fd) {
-    throw new UnsupportedError("File._openStdio");
+    throw UnsupportedError("File._openStdio");
   }
 }
 
@@ -200,17 +200,17 @@ class _File {
 class _Namespace {
   @patch
   static void _setupNamespace(var namespace) {
-    throw new UnsupportedError("_Namespace");
+    throw UnsupportedError("_Namespace");
   }
 
   @patch
   static _Namespace get _namespace {
-    throw new UnsupportedError("_Namespace");
+    throw UnsupportedError("_Namespace");
   }
 
   @patch
   static int get _namespacePointer {
-    throw new UnsupportedError("_Namespace");
+    throw UnsupportedError("_Namespace");
   }
 }
 
@@ -218,7 +218,7 @@ class _Namespace {
 class _RandomAccessFileOps {
   @patch
   factory _RandomAccessFileOps(int pointer) {
-    throw new UnsupportedError("RandomAccessFile");
+    throw UnsupportedError("RandomAccessFile");
   }
 }
 
@@ -226,7 +226,7 @@ class _RandomAccessFileOps {
 class _IOCrypto {
   @patch
   static Uint8List getRandomBytes(int count) {
-    throw new UnsupportedError("_IOCrypto.getRandomBytes");
+    throw UnsupportedError("_IOCrypto.getRandomBytes");
   }
 }
 
@@ -234,67 +234,67 @@ class _IOCrypto {
 class _Platform {
   @patch
   static int _numberOfProcessors() {
-    throw new UnsupportedError("Platform._numberOfProcessors");
+    throw UnsupportedError("Platform._numberOfProcessors");
   }
 
   @patch
   static String _pathSeparator() {
-    throw new UnsupportedError("Platform._pathSeparator");
+    throw UnsupportedError("Platform._pathSeparator");
   }
 
   @patch
   static String _operatingSystem() {
-    throw new UnsupportedError("Platform._operatingSystem");
+    throw UnsupportedError("Platform._operatingSystem");
   }
 
   @patch
   static _operatingSystemVersion() {
-    throw new UnsupportedError("Platform._operatingSystemVersion");
+    throw UnsupportedError("Platform._operatingSystemVersion");
   }
 
   @patch
   static _localHostname() {
-    throw new UnsupportedError("Platform._localHostname");
+    throw UnsupportedError("Platform._localHostname");
   }
 
   @patch
   static _executable() {
-    throw new UnsupportedError("Platform._executable");
+    throw UnsupportedError("Platform._executable");
   }
 
   @patch
   static _resolvedExecutable() {
-    throw new UnsupportedError("Platform._resolvedExecutable");
+    throw UnsupportedError("Platform._resolvedExecutable");
   }
 
   @patch
   static List<String> _executableArguments() {
-    throw new UnsupportedError("Platform._executableArguments");
+    throw UnsupportedError("Platform._executableArguments");
   }
 
   @patch
   static String _packageConfig() {
-    throw new UnsupportedError("Platform._packageConfig");
+    throw UnsupportedError("Platform._packageConfig");
   }
 
   @patch
   static _environment() {
-    throw new UnsupportedError("Platform._environment");
+    throw UnsupportedError("Platform._environment");
   }
 
   @patch
   static String _version() {
-    throw new UnsupportedError("Platform._version");
+    throw UnsupportedError("Platform._version");
   }
 
   @patch
   static String _localeName() {
-    throw new UnsupportedError("Platform._localeName");
+    throw UnsupportedError("Platform._localeName");
   }
 
   @patch
   static Uri _script() {
-    throw new UnsupportedError("Platform._script");
+    throw UnsupportedError("Platform._script");
   }
 }
 
@@ -302,32 +302,32 @@ class _Platform {
 class _ProcessUtils {
   @patch
   static Never _exit(int status) {
-    throw new UnsupportedError("ProcessUtils._exit");
+    throw UnsupportedError("ProcessUtils._exit");
   }
 
   @patch
   static void _setExitCode(int status) {
-    throw new UnsupportedError("ProcessUtils._setExitCode");
+    throw UnsupportedError("ProcessUtils._setExitCode");
   }
 
   @patch
   static int _getExitCode() {
-    throw new UnsupportedError("ProcessUtils._getExitCode");
+    throw UnsupportedError("ProcessUtils._getExitCode");
   }
 
   @patch
   static void _sleep(int millis) {
-    throw new UnsupportedError("ProcessUtils._sleep");
+    throw UnsupportedError("ProcessUtils._sleep");
   }
 
   @patch
   static int _pid(Process? process) {
-    throw new UnsupportedError("ProcessUtils._pid");
+    throw UnsupportedError("ProcessUtils._pid");
   }
 
   @patch
   static Stream<ProcessSignal> _watchSignal(ProcessSignal signal) {
-    throw new UnsupportedError("ProcessUtils._watchSignal");
+    throw UnsupportedError("ProcessUtils._watchSignal");
   }
 }
 
@@ -335,12 +335,12 @@ class _ProcessUtils {
 class ProcessInfo {
   @patch
   static int get currentRss {
-    throw new UnsupportedError("ProcessInfo.currentRss");
+    throw UnsupportedError("ProcessInfo.currentRss");
   }
 
   @patch
   static int get maxRss {
-    throw new UnsupportedError("ProcessInfo.maxRss");
+    throw UnsupportedError("ProcessInfo.maxRss");
   }
 }
 
@@ -356,7 +356,7 @@ class Process {
     bool runInShell = false,
     ProcessStartMode mode = ProcessStartMode.normal,
   }) {
-    throw new UnsupportedError("Process.start");
+    throw UnsupportedError("Process.start");
   }
 
   @patch
@@ -370,7 +370,7 @@ class Process {
     Encoding? stdoutEncoding = systemEncoding,
     Encoding? stderrEncoding = systemEncoding,
   }) {
-    throw new UnsupportedError("Process.run");
+    throw UnsupportedError("Process.run");
   }
 
   @patch
@@ -384,12 +384,12 @@ class Process {
     Encoding? stdoutEncoding = systemEncoding,
     Encoding? stderrEncoding = systemEncoding,
   }) {
-    throw new UnsupportedError("Process.runSync");
+    throw UnsupportedError("Process.runSync");
   }
 
   @patch
   static bool killPid(int pid, [ProcessSignal signal = ProcessSignal.sigterm]) {
-    throw new UnsupportedError("Process.killPid");
+    throw UnsupportedError("Process.killPid");
   }
 }
 
@@ -397,27 +397,27 @@ class Process {
 class InternetAddress {
   @patch
   static InternetAddress get loopbackIPv4 {
-    throw new UnsupportedError("InternetAddress.loopbackIPv4");
+    throw UnsupportedError("InternetAddress.loopbackIPv4");
   }
 
   @patch
   static InternetAddress get loopbackIPv6 {
-    throw new UnsupportedError("InternetAddress.loopbackIPv6");
+    throw UnsupportedError("InternetAddress.loopbackIPv6");
   }
 
   @patch
   static InternetAddress get anyIPv4 {
-    throw new UnsupportedError("InternetAddress.anyIPv4");
+    throw UnsupportedError("InternetAddress.anyIPv4");
   }
 
   @patch
   static InternetAddress get anyIPv6 {
-    throw new UnsupportedError("InternetAddress.anyIPv6");
+    throw UnsupportedError("InternetAddress.anyIPv6");
   }
 
   @patch
   factory InternetAddress(String address, {InternetAddressType? type}) {
-    throw new UnsupportedError("InternetAddress");
+    throw UnsupportedError("InternetAddress");
   }
 
   @patch
@@ -425,7 +425,7 @@ class InternetAddress {
     Uint8List rawAddress, {
     InternetAddressType? type,
   }) {
-    throw new UnsupportedError("InternetAddress.fromRawAddress");
+    throw UnsupportedError("InternetAddress.fromRawAddress");
   }
 
   @patch
@@ -433,7 +433,7 @@ class InternetAddress {
     String host, {
     InternetAddressType type = InternetAddressType.any,
   }) {
-    throw new UnsupportedError("InternetAddress.lookup");
+    throw UnsupportedError("InternetAddress.lookup");
   }
 
   @patch
@@ -441,7 +441,7 @@ class InternetAddress {
     InternetAddress address,
     String host,
   ) {
-    throw new UnsupportedError("InternetAddress._cloneWithNewHost");
+    throw UnsupportedError("InternetAddress._cloneWithNewHost");
   }
 
   @patch
@@ -454,7 +454,7 @@ class InternetAddress {
 class NetworkInterface {
   @patch
   static bool get listSupported {
-    throw new UnsupportedError("NetworkInterface.listSupported");
+    throw UnsupportedError("NetworkInterface.listSupported");
   }
 
   @patch
@@ -463,7 +463,7 @@ class NetworkInterface {
     bool includeLinkLocal = false,
     InternetAddressType type = InternetAddressType.any,
   }) {
-    throw new UnsupportedError("NetworkInterface.list");
+    throw UnsupportedError("NetworkInterface.list");
   }
 }
 
@@ -477,7 +477,7 @@ class RawServerSocket {
     bool v6Only = false,
     bool shared = false,
   }) {
-    throw new UnsupportedError("RawServerSocket.bind");
+    throw UnsupportedError("RawServerSocket.bind");
   }
 }
 
@@ -491,7 +491,7 @@ class ServerSocket {
     bool v6Only = false,
     bool shared = false,
   }) {
-    throw new UnsupportedError("ServerSocket.bind");
+    throw UnsupportedError("ServerSocket.bind");
   }
 }
 
@@ -505,7 +505,7 @@ class RawSocket {
     int sourcePort = 0,
     Duration? timeout,
   }) {
-    throw new UnsupportedError("RawSocket constructor");
+    throw UnsupportedError("RawSocket constructor");
   }
 
   @patch
@@ -515,7 +515,7 @@ class RawSocket {
     dynamic sourceAddress,
     int sourcePort = 0,
   }) {
-    throw new UnsupportedError("RawSocket constructor");
+    throw UnsupportedError("RawSocket constructor");
   }
 }
 
@@ -529,7 +529,7 @@ class Socket {
     int sourcePort = 0,
     Duration? timeout,
   }) {
-    throw new UnsupportedError("Socket constructor");
+    throw UnsupportedError("Socket constructor");
   }
 
   @patch
@@ -539,7 +539,7 @@ class Socket {
     dynamic sourceAddress,
     int sourcePort = 0,
   }) {
-    throw new UnsupportedError("Socket constructor");
+    throw UnsupportedError("Socket constructor");
   }
 }
 
@@ -600,7 +600,7 @@ class ResourceHandle {
 class SecureSocket {
   @patch
   factory SecureSocket._(RawSecureSocket rawSocket) {
-    throw new UnsupportedError("SecureSocket constructor");
+    throw UnsupportedError("SecureSocket constructor");
   }
 }
 
@@ -608,7 +608,7 @@ class SecureSocket {
 class RawSynchronousSocket {
   @patch
   static RawSynchronousSocket connectSync(dynamic host, int port) {
-    throw new UnsupportedError("RawSynchronousSocket.connectSync");
+    throw UnsupportedError("RawSynchronousSocket.connectSync");
   }
 }
 
@@ -624,17 +624,17 @@ class RawSocketOption {
 class SecurityContext {
   @patch
   factory SecurityContext({bool withTrustedRoots = false}) {
-    throw new UnsupportedError("SecurityContext constructor");
+    throw UnsupportedError("SecurityContext constructor");
   }
 
   @patch
   static SecurityContext get defaultContext {
-    throw new UnsupportedError("default SecurityContext getter");
+    throw UnsupportedError("default SecurityContext getter");
   }
 
   @patch
   static bool get alpnSupported {
-    throw new UnsupportedError("SecurityContext alpnSupported getter");
+    throw UnsupportedError("SecurityContext alpnSupported getter");
   }
 }
 
@@ -642,7 +642,7 @@ class SecurityContext {
 class X509Certificate {
   @patch
   factory X509Certificate._() {
-    throw new UnsupportedError("X509Certificate constructor");
+    throw UnsupportedError("X509Certificate constructor");
   }
 }
 
@@ -656,7 +656,7 @@ class RawDatagramSocket {
     bool reusePort = false,
     int ttl = 1,
   }) {
-    throw new UnsupportedError("RawDatagramSocket.bind");
+    throw UnsupportedError("RawDatagramSocket.bind");
   }
 }
 
@@ -664,7 +664,7 @@ class RawDatagramSocket {
 class _SecureFilter {
   @patch
   factory _SecureFilter._() {
-    throw new UnsupportedError("_SecureFilter._SecureFilter");
+    throw UnsupportedError("_SecureFilter._SecureFilter");
   }
 }
 
@@ -672,22 +672,22 @@ class _SecureFilter {
 class _StdIOUtils {
   @patch
   static Stdin _getStdioInputStream(int fd) {
-    throw new UnsupportedError("StdIOUtils._getStdioInputStream");
+    throw UnsupportedError("StdIOUtils._getStdioInputStream");
   }
 
   @patch
   static _getStdioOutputStream(int fd) {
-    throw new UnsupportedError("StdIOUtils._getStdioOutputStream");
+    throw UnsupportedError("StdIOUtils._getStdioOutputStream");
   }
 
   @patch
   static int _socketType(Socket socket) {
-    throw new UnsupportedError("StdIOUtils._socketType");
+    throw UnsupportedError("StdIOUtils._socketType");
   }
 
   @patch
   static _getStdioHandleType(int fd) {
-    throw new UnsupportedError("StdIOUtils._getStdioHandleType");
+    throw UnsupportedError("StdIOUtils._getStdioHandleType");
   }
 }
 
@@ -695,7 +695,7 @@ class _StdIOUtils {
 class _WindowsCodePageDecoder {
   @patch
   static String _decodeBytes(List<int> bytes) {
-    throw new UnsupportedError("_WindowsCodePageDecoder._decodeBytes");
+    throw UnsupportedError("_WindowsCodePageDecoder._decodeBytes");
   }
 }
 
@@ -703,7 +703,7 @@ class _WindowsCodePageDecoder {
 class _WindowsCodePageEncoder {
   @patch
   static List<int> _encodeString(String string) {
-    throw new UnsupportedError("_WindowsCodePageEncoder._encodeString");
+    throw UnsupportedError("_WindowsCodePageEncoder._encodeString");
   }
 }
 
@@ -719,7 +719,7 @@ class RawZLibFilter {
     List<int>? dictionary,
     bool raw,
   ) {
-    throw new UnsupportedError("_newZLibDeflateFilter");
+    throw UnsupportedError("_newZLibDeflateFilter");
   }
 
   @patch
@@ -729,7 +729,7 @@ class RawZLibFilter {
     List<int>? dictionary,
     bool raw,
   ) {
-    throw new UnsupportedError("_newZLibInflateFilter");
+    throw UnsupportedError("_newZLibInflateFilter");
   }
 }
 
@@ -737,17 +737,17 @@ class RawZLibFilter {
 class Stdin {
   @patch
   int readByteSync() {
-    throw new UnsupportedError("Stdin.readByteSync");
+    throw UnsupportedError("Stdin.readByteSync");
   }
 
   @patch
   bool get echoMode {
-    throw new UnsupportedError("Stdin.echoMode");
+    throw UnsupportedError("Stdin.echoMode");
   }
 
   @patch
   void set echoMode(bool enabled) {
-    throw new UnsupportedError("Stdin.echoMode");
+    throw UnsupportedError("Stdin.echoMode");
   }
 
   @patch
@@ -762,17 +762,17 @@ class Stdin {
 
   @patch
   bool get lineMode {
-    throw new UnsupportedError("Stdin.lineMode");
+    throw UnsupportedError("Stdin.lineMode");
   }
 
   @patch
   void set lineMode(bool enabled) {
-    throw new UnsupportedError("Stdin.lineMode");
+    throw UnsupportedError("Stdin.lineMode");
   }
 
   @patch
   bool get supportsAnsiEscapes {
-    throw new UnsupportedError("Stdin.supportsAnsiEscapes");
+    throw UnsupportedError("Stdin.supportsAnsiEscapes");
   }
 }
 
@@ -780,22 +780,22 @@ class Stdin {
 class Stdout {
   @patch
   bool _hasTerminal(int fd) {
-    throw new UnsupportedError("Stdout.hasTerminal");
+    throw UnsupportedError("Stdout.hasTerminal");
   }
 
   @patch
   int _terminalColumns(int fd) {
-    throw new UnsupportedError("Stdout.terminalColumns");
+    throw UnsupportedError("Stdout.terminalColumns");
   }
 
   @patch
   int _terminalLines(int fd) {
-    throw new UnsupportedError("Stdout.terminalLines");
+    throw UnsupportedError("Stdout.terminalLines");
   }
 
   @patch
   static bool _supportsAnsiEscapes(int fd) {
-    throw new UnsupportedError("Stdout.supportsAnsiEscapes");
+    throw UnsupportedError("Stdout.supportsAnsiEscapes");
   }
 }
 
@@ -807,12 +807,12 @@ class _FileSystemWatcher {
     int events,
     bool recursive,
   ) {
-    throw new UnsupportedError("_FileSystemWatcher.watch");
+    throw UnsupportedError("_FileSystemWatcher.watch");
   }
 
   @patch
   static bool get isSupported {
-    throw new UnsupportedError("_FileSystemWatcher.isSupported");
+    throw UnsupportedError("_FileSystemWatcher.isSupported");
   }
 }
 
@@ -820,6 +820,6 @@ class _FileSystemWatcher {
 class _IOService {
   @patch
   static Future<Object?> _dispatch(int request, List data) {
-    throw new UnsupportedError("_IOService._dispatch");
+    throw UnsupportedError("_IOService._dispatch");
   }
 }

sdk/lib/_internal/wasm/lib/math_patch.dart

@@ -149,7 +149,7 @@ class Random {
   factory Random([int? seed]) {
     var state = _Random._setupSeed((seed == null) ? _Random._nextSeed() : seed);
     // Crank a couple of times to distribute the seed bits a bit further.
-    return new _Random._withState(state)
+    return _Random._withState(state)
       .._nextState()
       .._nextState()
       .._nextState()
@@ -225,7 +225,7 @@ class _Random implements Random {
   static const _POW2_27_D = 1.0 * (1 << 27);
 
   // Use a singleton Random object to get a new seed if no seed was passed.
-  static final _prng = new _Random._withState(_initialSeed());
+  static final _prng = _Random._withState(_initialSeed());
 
   static int _setupSeed(int seed) => mix64(seed);
 

sdk/lib/_internal/wasm/lib/object_patch.dart

@@ -11,7 +11,7 @@ class Object {
   external bool operator ==(Object other);
 
   // Random number generator used to generate identity hash codes.
-  static final _hashCodeRnd = new Random();
+  static final _hashCodeRnd = Random();
 
   static int _objectHashCode(Object obj) {
     var result = getIdentityHashField(obj);
@@ -55,7 +55,7 @@ class Object {
   @patch
   @pragma("wasm:entry-point")
   dynamic noSuchMethod(Invocation invocation) {
-    throw new NoSuchMethodError.withInvocation(this, invocation);
+    throw NoSuchMethodError.withInvocation(this, invocation);
   }
 
   // Used for `null.toString` tear-offs.
@@ -65,6 +65,6 @@ class Object {
   // Used for `null.noSuchMethod` tear-offs.
   @pragma("wasm:entry-point")
   static dynamic _nullNoSuchMethod(Invocation invocation) {
-    throw new NoSuchMethodError.withInvocation(null, invocation);
+    throw NoSuchMethodError.withInvocation(null, invocation);
   }
 }

sdk/lib/_internal/wasm/lib/regexp_helper.dart

@@ -138,7 +138,7 @@ class JSSyntaxRegExp implements RegExp {
 
   RegExpMatch? firstMatch(String string) {
     JSNativeMatch? m = _nativeRegExp.exec(string.toJS);
-    return m == null ? null : new _MatchImplementation(this, m);
+    return m == null ? null : _MatchImplementation(this, m);
   }
 
   bool hasMatch(String string) {
@@ -161,7 +161,7 @@ class JSSyntaxRegExp implements RegExp {
     JSNativeRegExp regexp = _nativeGlobalVersion;
     regexp.lastIndex = start.toJS;
     JSNativeMatch? match = regexp.exec(string);
-    return match == null ? null : new _MatchImplementation(this, match);
+    return match == null ? null : _MatchImplementation(this, match);
   }
 
   RegExpMatch? _execAnchored(String string, int start) {
@@ -172,7 +172,7 @@ class JSSyntaxRegExp implements RegExp {
     // If the last capture group participated, the original regexp did not
     // match at the start position.
     if (match.pop() != null) return null;
-    return new _MatchImplementation(this, match);
+    return _MatchImplementation(this, match);
   }
 
   RegExpMatch? matchAsPrefix(String string, [int start = 0]) {
@@ -246,7 +246,7 @@ class _AllMatchesIterable extends Iterable<RegExpMatch> {
   _AllMatchesIterable(this._re, this._string, this._start);
 
   Iterator<RegExpMatch> get iterator =>
-      new _AllMatchesIterator(_re, _string, _start);
+      _AllMatchesIterator(_re, _string, _start);
 }
 
 class _AllMatchesIterator implements Iterator<RegExpMatch> {

sdk/lib/_internal/wasm/lib/simd.dart

@@ -110,7 +110,7 @@ final class NaiveUnmodifiableInt32x4List extends NaiveInt32x4List {
 
   @override
   void operator []=(int index, Int32x4 value) {
-    throw new UnsupportedError("Cannot modify an unmodifiable list");
+    throw UnsupportedError("Cannot modify an unmodifiable list");
   }
 
   @override
@@ -216,7 +216,7 @@ final class NaiveUnmodifiableFloat32x4List extends NaiveFloat32x4List {
 
   @override
   void operator []=(int index, Float32x4 value) {
-    throw new UnsupportedError("Cannot modify an unmodifiable list");
+    throw UnsupportedError("Cannot modify an unmodifiable list");
   }
 
   @override
@@ -316,7 +316,7 @@ final class NaiveUnmodifiableFloat64x2List extends NaiveFloat64x2List {
 
   @override
   void operator []=(int index, Float64x2 value) {
-    throw new UnsupportedError("Cannot modify an unmodifiable list");
+    throw UnsupportedError("Cannot modify an unmodifiable list");
   }
 
   @override

sdk/lib/_internal/wasm/lib/symbol_patch.dart

@@ -30,7 +30,7 @@ class Symbol {
     // Class._constructor@xxx -> Class._constructor
     // _Class@xxx._constructor@xxx -> _Class._constructor
     // lib._S@xxx with lib._M1@xxx, lib._M2@xxx -> lib._S with lib._M1, lib._M2
-    StringBuffer result = new StringBuffer();
+    StringBuffer result = StringBuffer();
     bool add_setter_suffix = false;
     var pos = 0;
     if (string.length >= 4 && string[3] == ':') {

sdk/lib/_internal/wasm/lib/weak_patch.dart

@@ -17,7 +17,7 @@ void _checkValidWeakTarget(Object object) {
       (object is Pointer) ||
       (object is Struct) ||
       (object is Union)) {
-    throw new ArgumentError.value(
+    throw ArgumentError.value(
       object,
       "A string, number, boolean, record, Pointer, Struct or Union "
       "can't be a weak target",

sdk/lib/_internal/wasm_js_compatibility/lib/convert_patch.dart

@@ -16,8 +16,8 @@ dynamic _parseJson(
   String source,
   Object? Function(Object? key, Object? value)? reviver,
 ) {
-  _JsonListener listener = new _JsonListener(reviver);
-  var parser = new _JsonStringParser(listener);
+  _JsonListener listener = _JsonListener(reviver);
+  var parser = _JsonStringParser(listener);
   parser.chunk = source;
   parser.chunkEnd = source.length;
   parser.parse(0);
@@ -171,7 +171,7 @@ class _NumberBuffer {
   Uint8List list;
   int length = 0;
   _NumberBuffer(int initialCapacity)
-    : list = new Uint8List(_initialCapacity(initialCapacity));
+    : list = Uint8List(_initialCapacity(initialCapacity));
 
   int get capacity => list.length;
 
@@ -194,13 +194,13 @@ class _NumberBuffer {
   void ensureCapacity(int newCapacity) {
     Uint8List list = this.list;
     if (newCapacity <= list.length) return;
-    Uint8List newList = new Uint8List(newCapacity);
+    Uint8List newList = Uint8List(newCapacity);
     newList.setRange(0, list.length, list, 0);
     this.list = newList;
   }
 
   String getString() {
-    String result = new String.fromCharCodes(list, 0, length);
+    String result = String.fromCharCodes(list, 0, length);
     return result;
   }
 
@@ -1128,7 +1128,7 @@ abstract class _ChunkedJsonParser<T> {
   int beginChunkNumber(int state, int start) {
     int end = chunkEnd;
     int length = end - start;
-    var buffer = new _NumberBuffer(length);
+    var buffer = _NumberBuffer(length);
     copyCharsToList(start, end, buffer.list, 0);
     buffer.length = length;
     this.buffer = buffer;
@@ -1337,7 +1337,7 @@ abstract class _ChunkedJsonParser<T> {
       message = "Unexpected character";
       if (position == chunkEnd) message = "Unexpected end of input";
     }
-    throw new FormatException(message, chunk, position);
+    throw FormatException(message, chunk, position);
   }
 }
 
@@ -1357,7 +1357,7 @@ class _JsonStringParser extends _ChunkedJsonParser<String> {
   }
 
   void beginString() {
-    this.buffer = new StringBuffer();
+    this.buffer = StringBuffer();
   }
 
   void addSliceToString(int start, int end) {
@@ -1441,7 +1441,7 @@ class _JsonUtf8Parser extends _ChunkedJsonParser<List<int>> {
   String getString(int start, int end, int bits) {
     const int maxAsciiChar = 0x7f;
     if (bits <= maxAsciiChar) {
-      return new String.fromCharCodes(chunk, start, end);
+      return String.fromCharCodes(chunk, start, end);
     }
     beginString();
     if (start < end) addSliceToString(start, end);
@@ -1450,7 +1450,7 @@ class _JsonUtf8Parser extends _ChunkedJsonParser<List<int>> {
   }
 
   void beginString() {
-    this.buffer = new StringBuffer();
+    this.buffer = StringBuffer();
   }
 
   void addSliceToString(int start, int end) {

sdk/lib/async/broadcast_stream_controller.dart

@@ -98,34 +98,34 @@ abstract class _BroadcastStreamController<T>
     : _state = _STATE_INITIAL;
 
   void Function() get onPause {
-    throw new UnsupportedError(
+    throw UnsupportedError(
       "Broadcast stream controllers do not support pause callbacks",
     );
   }
 
   void set onPause(void onPauseHandler()?) {
-    throw new UnsupportedError(
+    throw UnsupportedError(
       "Broadcast stream controllers do not support pause callbacks",
     );
   }
 
   void Function() get onResume {
-    throw new UnsupportedError(
+    throw UnsupportedError(
       "Broadcast stream controllers do not support pause callbacks",
     );
   }
 
   void set onResume(void onResumeHandler()?) {
-    throw new UnsupportedError(
+    throw UnsupportedError(
       "Broadcast stream controllers do not support pause callbacks",
     );
   }
 
   // StreamController interface.
 
-  Stream<T> get stream => new _BroadcastStream<T>(this);
+  Stream<T> get stream => _BroadcastStream<T>(this);
 
-  StreamSink<T> get sink => new _StreamSinkWrapper<T>(this);
+  StreamSink<T> get sink => _StreamSinkWrapper<T>(this);
 
   bool get isClosed => (_state & _STATE_CLOSED) != 0;
 
@@ -205,9 +205,9 @@ abstract class _BroadcastStreamController<T>
     bool cancelOnError,
   ) {
     if (isClosed) {
-      return new _DoneStreamSubscription<T>(onDone);
+      return _DoneStreamSubscription<T>(onDone);
     }
-    var subscription = new _BroadcastSubscription<T>(
+    var subscription = _BroadcastSubscription<T>(
       this,
       onData,
       onError,
@@ -246,10 +246,10 @@ abstract class _BroadcastStreamController<T>
 
   Error _addEventError() {
     if (isClosed) {
-      return new StateError("Cannot add new events after calling close");
+      return StateError("Cannot add new events after calling close");
     }
     assert(_isAddingStream);
-    return new StateError("Cannot add new events while doing an addStream");
+    return StateError("Cannot add new events while doing an addStream");
   }
 
   void add(T data) {
@@ -280,11 +280,7 @@ abstract class _BroadcastStreamController<T>
   Future addStream(Stream<T> stream, {bool? cancelOnError}) {
     if (!_mayAddEvent) throw _addEventError();
     _state |= _STATE_ADDSTREAM;
-    var addStreamState = new _AddStreamState(
-      this,
-      stream,
-      cancelOnError ?? false,
-    );
+    var addStreamState = _AddStreamState(this, stream, cancelOnError ?? false);
     _addStreamState = addStreamState;
     return addStreamState.addStreamFuture;
   }
@@ -311,7 +307,7 @@ abstract class _BroadcastStreamController<T>
     void action(_BufferingStreamSubscription<T> subscription),
   ) {
     if (_isFiring) {
-      throw new StateError(
+      throw StateError(
         "Cannot fire new event. Controller is already firing an event",
       );
     }
@@ -373,7 +369,7 @@ class _SyncBroadcastStreamController<T> extends _BroadcastStreamController<T>
 
   _addEventError() {
     if (_isFiring) {
-      return new StateError(
+      return StateError(
         "Cannot fire new event. Controller is already firing an event",
       );
     }
@@ -429,7 +425,7 @@ class _AsyncBroadcastStreamController<T> extends _BroadcastStreamController<T> {
       subscription != null;
       subscription = subscription._next
     ) {
-      subscription._addPending(new _DelayedData<T>(data));
+      subscription._addPending(_DelayedData<T>(data));
     }
   }
 
@@ -439,7 +435,7 @@ class _AsyncBroadcastStreamController<T> extends _BroadcastStreamController<T> {
       subscription != null;
       subscription = subscription._next
     ) {
-      subscription._addPending(new _DelayedError(error, stackTrace));
+      subscription._addPending(_DelayedError(error, stackTrace));
     }
   }
 
@@ -481,12 +477,12 @@ class _AsBroadcastStreamController<T> extends _SyncBroadcastStreamController<T>
   }
 
   void _addPendingEvent(_DelayedEvent event) {
-    (_pending ??= new _PendingEvents<T>()).add(event);
+    (_pending ??= _PendingEvents<T>()).add(event);
   }
 
   void add(T data) {
     if (!isClosed && _isFiring) {
-      _addPendingEvent(new _DelayedData<T>(data));
+      _addPendingEvent(_DelayedData<T>(data));
       return;
     }
     super.add(data);
@@ -497,7 +493,7 @@ class _AsBroadcastStreamController<T> extends _SyncBroadcastStreamController<T>
     if (!_mayAddEvent) throw _addEventError();
     AsyncError(:error, :stackTrace) = _interceptUserError(error, stackTrace);
     if (!isClosed && _isFiring) {
-      _addPendingEvent(new _DelayedError(error, stackTrace));
+      _addPendingEvent(_DelayedError(error, stackTrace));
       return;
     }
     _addError(error, stackTrace);

sdk/lib/async/future.dart

@@ -41,7 +41,7 @@ abstract class FutureOr<T> {
   // Private generative constructor, so that it is not subclassable, mixable,
   // or instantiable.
   FutureOr._() {
-    throw new UnsupportedError("FutureOr cannot be instantiated");
+    throw UnsupportedError("FutureOr cannot be instantiated");
   }
 }
 
@@ -235,7 +235,7 @@ abstract interface class Future<T> {
   static final _Future<void> _nullFuture = nullFuture as _Future<void>;
 
   /// A `Future<bool>` completed with `false`.
-  static final _Future<bool> _falseFuture = new _Future<bool>.zoneValue(
+  static final _Future<bool> _falseFuture = _Future<bool>.zoneValue(
     false,
     _rootZone,
   );
@@ -253,7 +253,7 @@ abstract interface class Future<T> {
   /// If a non-future value is returned, the returned future is completed
   /// with that value.
   factory Future(FutureOr<T> computation()) {
-    _Future<T> result = new _Future<T>();
+    _Future<T> result = _Future<T>();
     Timer.run(() {
       FutureOr<T> computationResult;
       try {
@@ -280,7 +280,7 @@ abstract interface class Future<T> {
   /// If calling [computation] returns a non-future value,
   /// the returned future is completed with that value.
   factory Future.microtask(FutureOr<T> computation()) {
-    _Future<T> result = new _Future<T>();
+    _Future<T> result = _Future<T>();
     scheduleMicrotask(() {
       FutureOr<T> computationResult;
       try {
@@ -348,7 +348,7 @@ abstract interface class Future<T> {
   @pragma("vm:entry-point")
   @pragma("vm:prefer-inline")
   factory Future.value([FutureOr<T>? value]) {
-    return new _Future<T>.immediate(value == null ? value as T : value);
+    return _Future<T>.immediate(value == null ? value as T : value);
   }
 
   /// Creates a future that completes with an error.
@@ -410,7 +410,7 @@ abstract interface class Future<T> {
       );
     }
     _Future<T> result = _Future<T>();
-    new Timer(duration, () {
+    Timer(duration, () {
       if (computation == null) {
         result._complete(null as T);
       } else {
@@ -612,7 +612,7 @@ abstract interface class Future<T> {
   /// }
   /// ```
   static Future<T> any<T>(Iterable<Future<T>> futures) {
-    var completer = new Completer<T>.sync();
+    var completer = Completer<T>.sync();
     void onValue(T value) {
       if (!completer.isCompleted) completer.complete(value);
     }
@@ -697,7 +697,7 @@ abstract interface class Future<T> {
   /// // Outputs: 'Finished with 3'
   /// ```
   static Future<void> doWhile(FutureOr<bool> action()) {
-    _Future<void> doneSignal = new _Future<void>();
+    _Future<void> doneSignal = _Future<void>();
     late void Function(bool) nextIteration;
     // Bind this callback explicitly so that each iteration isn't bound in the
     // context of all the previous iterations' callbacks.
@@ -1192,7 +1192,7 @@ abstract interface class Completer<T> {
   ///   completer.complete('completion value');
   /// }
   /// ```
-  factory Completer() => new _AsyncCompleter<T>();
+  factory Completer() => _AsyncCompleter<T>();
 
   /// Completes the future synchronously.
   ///
@@ -1243,7 +1243,7 @@ abstract interface class Completer<T> {
   ///   foo();  // In this case, foo() runs after bar().
   /// });
   /// ```
-  factory Completer.sync() => new _SyncCompleter<T>();
+  factory Completer.sync() => _SyncCompleter<T>();
 
   /// The future that is completed by this completer.
   ///

sdk/lib/async/future_impl.dart

@@ -73,14 +73,14 @@ AsyncError _interceptUserError(Object error, StackTrace? stackTrace) {
 abstract class _Completer<T> implements Completer<T> {
   @pragma("wasm:entry-point")
   @pragma("vm:entry-point")
-  final _Future<T> future = new _Future<T>();
+  final _Future<T> future = _Future<T>();
 
   // Overridden by either a synchronous or asynchronous implementation.
   void complete([FutureOr<T>? value]);
 
   @pragma("wasm:entry-point")
   void completeError(Object error, [StackTrace? stackTrace]) {
-    if (!future._mayComplete) throw new StateError("Future already completed");
+    if (!future._mayComplete) throw StateError("Future already completed");
     _completeErrorObject(_interceptUserError(error, stackTrace));
   }
 
@@ -97,7 +97,7 @@ abstract class _Completer<T> implements Completer<T> {
 class _AsyncCompleter<T> extends _Completer<T> {
   @pragma("wasm:entry-point")
   void complete([FutureOr<T>? value]) {
-    if (!future._mayComplete) throw new StateError("Future already completed");
+    if (!future._mayComplete) throw StateError("Future already completed");
     future._asyncComplete(value == null ? value as dynamic : value);
   }
 
@@ -112,7 +112,7 @@ class _AsyncCompleter<T> extends _Completer<T> {
 @pragma("vm:entry-point")
 class _SyncCompleter<T> extends _Completer<T> {
   void complete([FutureOr<T>? value]) {
-    if (!future._mayComplete) throw new StateError("Future already completed");
+    if (!future._mayComplete) throw StateError("Future already completed");
     future._complete(value == null ? value as dynamic : value);
   }
 
@@ -411,8 +411,8 @@ class _Future<T> implements Future<T> {
         onError = _registerErrorHandler(onError, currentZone);
       }
     }
-    _Future<R> result = new _Future<R>();
-    _addListener(new _FutureListener<T, R>.then(result, f, onError));
+    _Future<R> result = _Future<R>();
+    _addListener(_FutureListener<T, R>.then(result, f, onError));
     return result;
   }
 
@@ -421,8 +421,8 @@ class _Future<T> implements Future<T> {
   /// Used by the implementation of `await` to listen to a future.
   /// The system created listeners are not registered in the zone.
   Future<E> _thenAwait<E>(FutureOr<E> f(T value), Function onError) {
-    _Future<E> result = new _Future<E>();
-    _addListener(new _FutureListener<T, E>.thenAwait(result, f, onError));
+    _Future<E> result = _Future<E>();
+    _addListener(_FutureListener<T, E>.thenAwait(result, f, onError));
     return result;
   }
 
@@ -442,12 +442,12 @@ class _Future<T> implements Future<T> {
   }
 
   Future<T> catchError(Function onError, {bool test(Object error)?}) {
-    _Future<T> result = new _Future<T>();
+    _Future<T> result = _Future<T>();
     if (!identical(result._zone, _rootZone)) {
       onError = _registerErrorHandler(onError, result._zone);
       if (test != null) test = result._zone.registerUnaryCallback(test);
     }
-    _addListener(new _FutureListener<T, T>.catchError(result, onError, test));
+    _addListener(_FutureListener<T, T>.catchError(result, onError, test));
     return result;
   }
 
@@ -469,15 +469,15 @@ class _Future<T> implements Future<T> {
   }
 
   Future<T> whenComplete(dynamic action()) {
-    _Future<T> result = new _Future<T>();
+    _Future<T> result = _Future<T>();
     if (!identical(result._zone, _rootZone)) {
       action = result._zone.registerCallback<dynamic>(action);
     }
-    _addListener(new _FutureListener<T, T>.whenComplete(result, action));
+    _addListener(_FutureListener<T, T>.whenComplete(result, action));
     return result;
   }
 
-  Stream<T> asStream() => new Stream<T>.fromFuture(this);
+  Stream<T> asStream() => Stream<T>.fromFuture(this);
 
   void _setPendingComplete() {
     assert(_mayComplete); // Aka. _stateIncomplete
@@ -914,7 +914,7 @@ class _Future<T> implements Future<T> {
             if (hasError && identical(source._error.error, e)) {
               listenerValueOrError = source._error;
             } else {
-              listenerValueOrError = new AsyncError(e, s);
+              listenerValueOrError = AsyncError(e, s);
             }
             listenerHasError = true;
             return;
@@ -950,7 +950,7 @@ class _Future<T> implements Future<T> {
           try {
             listenerValueOrError = listener.handleValue(sourceResult);
           } catch (e, s) {
-            listenerValueOrError = new AsyncError(e, s);
+            listenerValueOrError = AsyncError(e, s);
             listenerHasError = true;
           }
         }
@@ -967,7 +967,7 @@ class _Future<T> implements Future<T> {
             if (identical(source._error.error, e)) {
               listenerValueOrError = source._error;
             } else {
-              listenerValueOrError = new AsyncError(e, s);
+              listenerValueOrError = AsyncError(e, s);
             }
             listenerHasError = true;
           }
@@ -1033,15 +1033,15 @@ class _Future<T> implements Future<T> {
 
   @pragma("vm:entry-point")
   Future<T> timeout(Duration timeLimit, {FutureOr<T> onTimeout()?}) {
-    if (_isComplete) return new _Future.immediate(this);
+    if (_isComplete) return _Future.immediate(this);
     @pragma('vm:awaiter-link')
-    _Future<T> _future = new _Future<T>();
+    _Future<T> _future = _Future<T>();
     Timer timer;
     if (onTimeout == null) {
-      timer = new Timer(timeLimit, () {
+      timer = Timer(timeLimit, () {
         _future._completeErrorObject(
           AsyncError(
-            new TimeoutException("Future not completed", timeLimit),
+            TimeoutException("Future not completed", timeLimit),
             StackTrace.current,
           ),
         );
@@ -1052,7 +1052,7 @@ class _Future<T> implements Future<T> {
         onTimeout,
       );
 
-      timer = new Timer(timeLimit, () {
+      timer = Timer(timeLimit, () {
         try {
           _future._complete(zone.run(onTimeoutHandler));
         } catch (e, s) {

sdk/lib/async/schedule_microtask.dart

@@ -61,7 +61,7 @@ void _startMicrotaskLoop() {
 /// The microtask is called after all other currently scheduled
 /// microtasks, but as part of the current system event.
 void _scheduleAsyncCallback(_AsyncCallback callback) {
-  _AsyncCallbackEntry newEntry = new _AsyncCallbackEntry(callback);
+  _AsyncCallbackEntry newEntry = _AsyncCallbackEntry(callback);
   _AsyncCallbackEntry? lastCallback = _lastCallback;
   if (lastCallback == null) {
     _nextCallback = _lastCallback = newEntry;
@@ -86,7 +86,7 @@ void _schedulePriorityAsyncCallback(_AsyncCallback callback) {
     _lastPriorityCallback = _lastCallback;
     return;
   }
-  _AsyncCallbackEntry entry = new _AsyncCallbackEntry(callback);
+  _AsyncCallbackEntry entry = _AsyncCallbackEntry(callback);
   _AsyncCallbackEntry? lastPriorityCallback = _lastPriorityCallback;
   if (lastPriorityCallback == null) {
     entry.next = _nextCallback;

sdk/lib/async/stream.dart

@@ -241,7 +241,7 @@ abstract mixin class Stream<T> {
     // Use the controller's buffering to fill in the value even before
     // the stream has a listener. For a single value, it's not worth it
     // to wait for a listener before doing the `then` on the future.
-    _StreamController<T> controller = new _SyncStreamController<T>(
+    _StreamController<T> controller = _SyncStreamController<T>(
       null,
       null,
       null,
@@ -295,7 +295,7 @@ abstract mixin class Stream<T> {
   /// // "Done" when stream completed.
   /// ```
   factory Stream.fromFutures(Iterable<Future<T>> futures) {
-    _StreamController<T> controller = new _SyncStreamController<T>(
+    _StreamController<T> controller = _SyncStreamController<T>(
       null,
       null,
       null,
@@ -511,7 +511,7 @@ abstract mixin class Stream<T> {
     }
     var controller = _SyncStreamController<T>(null, null, null, null);
     // Counts the time that the Stream was running (and not paused).
-    Stopwatch watch = new Stopwatch();
+    Stopwatch watch = Stopwatch();
     controller.onListen = () {
       int computationCount = 0;
       void sendEvent(_) {
@@ -544,7 +544,7 @@ abstract mixin class Stream<T> {
         ..onResume = () {
           Duration elapsed = watch.elapsed;
           watch.start();
-          timer = new Timer(period - elapsed, () {
+          timer = Timer(period - elapsed, () {
             timer = Timer.periodic(period, sendEvent);
             sendEvent(null);
           });
@@ -595,7 +595,7 @@ abstract mixin class Stream<T> {
     Stream<dynamic> source,
     EventSink<dynamic> mapSink(EventSink<T> sink),
   ) {
-    return new _BoundSinkStream(source, mapSink);
+    return _BoundSinkStream(source, mapSink);
   }
 
   /// Adapts [source] to be a `Stream<T>`.
@@ -604,8 +604,7 @@ abstract mixin class Stream<T> {
   /// must satisfy the requirements of both the new type and its original type.
   ///
   /// Data events created by the source stream must also be instances of [T].
-  static Stream<T> castFrom<S, T>(Stream<S> source) =>
-      new CastStream<S, T>(source);
+  static Stream<T> castFrom<S, T>(Stream<S> source) => CastStream<S, T>(source);
 
   /// Whether this stream is a broadcast stream.
   bool get isBroadcast => false;
@@ -683,7 +682,7 @@ abstract mixin class Stream<T> {
     void onListen(StreamSubscription<T> subscription)?,
     void onCancel(StreamSubscription<T> subscription)?,
   }) {
-    return new _AsBroadcastStream<T>(this, onListen, onCancel);
+    return _AsBroadcastStream<T>(this, onListen, onCancel);
   }
 
   /// Adds a subscription to this stream.
@@ -750,7 +749,7 @@ abstract mixin class Stream<T> {
   /// customStream.listen(print); // Outputs event values: 4,5,6.
   /// ```
   Stream<T> where(bool test(T event)) {
-    return new _WhereStream<T>(this, test);
+    return _WhereStream<T>(this, test);
   }
 
   /// Transforms each element of this stream into a new stream event.
@@ -794,7 +793,7 @@ abstract mixin class Stream<T> {
   /// // Square: 16
   /// ```
   Stream<S> map<S>(S convert(T event)) {
-    return new _MapStream<T, S>(this, convert);
+    return _MapStream<T, S>(this, convert);
   }
 
   /// Creates a new stream with each data event of this stream asynchronously
@@ -969,7 +968,7 @@ abstract mixin class Stream<T> {
             " as arguments.",
       );
     }
-    return new _HandleErrorStream<T>(this, callback, test);
+    return _HandleErrorStream<T>(this, callback, test);
   }
 
   /// Transforms each element of this stream into a sequence of elements.
@@ -990,7 +989,7 @@ abstract mixin class Stream<T> {
   /// If a broadcast stream is listened to more than once, each subscription
   /// will individually call `convert` and expand the events.
   Stream<S> expand<S>(Iterable<S> convert(T element)) {
-    return new _ExpandStream<T, S>(this, convert);
+    return _ExpandStream<T, S>(this, convert);
   }
 
   /// Pipes the events of this stream into [streamConsumer].
@@ -1065,7 +1064,7 @@ abstract mixin class Stream<T> {
   /// print(result); // 28
   /// ```
   Future<T> reduce(T combine(T previous, T element)) {
-    _Future<T> result = new _Future<T>();
+    _Future<T> result = _Future<T>();
     bool seenFirst = false;
     late T value;
     StreamSubscription<T> subscription = this.listen(
@@ -1119,7 +1118,7 @@ abstract mixin class Stream<T> {
   /// print(result); // 38
   /// ```
   Future<S> fold<S>(S initialValue, S combine(S previous, T element)) {
-    _Future<S> result = new _Future<S>();
+    _Future<S> result = _Future<S>();
     S value = initialValue;
     StreamSubscription<T> subscription = this.listen(
       null,
@@ -1157,8 +1156,8 @@ abstract mixin class Stream<T> {
   /// print(result); // 'Mars--Venus--Earth'
   /// ```
   Future<String> join([String separator = ""]) {
-    _Future<String> result = new _Future<String>();
-    StringBuffer buffer = new StringBuffer();
+    _Future<String> result = _Future<String>();
+    StringBuffer buffer = StringBuffer();
     bool first = true;
     StreamSubscription<T> subscription = this.listen(
       null,
@@ -1210,7 +1209,7 @@ abstract mixin class Stream<T> {
   /// print(result); // true
   /// ```
   Future<bool> contains(Object? needle) {
-    _Future<bool> future = new _Future<bool>();
+    _Future<bool> future = _Future<bool>();
     StreamSubscription<T> subscription = this.listen(
       null,
       onError: future._completeError,
@@ -1238,7 +1237,7 @@ abstract mixin class Stream<T> {
   /// the returned future completes with that error,
   /// and processing stops.
   Future<void> forEach(void action(T element)) {
-    _Future future = new _Future();
+    _Future future = _Future();
     StreamSubscription<T> subscription = this.listen(
       null,
       onError: future._completeError,
@@ -1279,7 +1278,7 @@ abstract mixin class Stream<T> {
   /// print(result); // false
   /// ```
   Future<bool> every(bool test(T element)) {
-    _Future<bool> future = new _Future<bool>();
+    _Future<bool> future = _Future<bool>();
     StreamSubscription<T> subscription = this.listen(
       null,
       onError: future._completeError,
@@ -1321,7 +1320,7 @@ abstract mixin class Stream<T> {
   /// print(result); // true
   /// ```
   Future<bool> any(bool test(T element)) {
-    _Future<bool> future = new _Future<bool>();
+    _Future<bool> future = _Future<bool>();
     StreamSubscription<T> subscription = this.listen(
       null,
       onError: future._completeError,
@@ -1352,7 +1351,7 @@ abstract mixin class Stream<T> {
   /// This operation listens to this stream, and a non-broadcast stream cannot
   /// be reused after finding its length.
   Future<int> get length {
-    _Future<int> future = new _Future<int>();
+    _Future<int> future = _Future<int>();
     int count = 0;
     this.listen(
       (_) {
@@ -1380,7 +1379,7 @@ abstract mixin class Stream<T> {
   /// This operation listens to this stream, and a non-broadcast stream cannot
   /// be reused after checking whether it is empty.
   Future<bool> get isEmpty {
-    _Future<bool> future = new _Future<bool>();
+    _Future<bool> future = _Future<bool>();
     StreamSubscription<T> subscription = this.listen(
       null,
       onError: future._completeError,
@@ -1412,7 +1411,7 @@ abstract mixin class Stream<T> {
   /// and processing stops.
   Future<List<T>> toList() {
     List<T> result = <T>[];
-    _Future<List<T>> future = new _Future<List<T>>();
+    _Future<List<T>> future = _Future<List<T>>();
     this.listen(
       (T data) {
         result.add(data);
@@ -1442,8 +1441,8 @@ abstract mixin class Stream<T> {
   /// the returned future is completed with that error,
   /// and processing stops.
   Future<Set<T>> toSet() {
-    Set<T> result = new Set<T>();
-    _Future<Set<T>> future = new _Future<Set<T>>();
+    Set<T> result = Set<T>();
+    _Future<Set<T>> future = _Future<Set<T>>();
     this.listen(
       (T data) {
         result.add(data);
@@ -1512,7 +1511,7 @@ abstract mixin class Stream<T> {
   /// stream.forEach(print); // Outputs events: 0, ... 59.
   /// ```
   Stream<T> take(int count) {
-    return new _TakeStream<T>(this, count);
+    return _TakeStream<T>(this, count);
   }
 
   /// Forwards data events while [test] is successful.
@@ -1543,7 +1542,7 @@ abstract mixin class Stream<T> {
   /// stream.forEach(print); // Outputs events: 0, ..., 5.
   /// ```
   Stream<T> takeWhile(bool test(T element)) {
-    return new _TakeWhileStream<T>(this, test);
+    return _TakeWhileStream<T>(this, test);
   }
 
   /// Skips the first [count] data events from this stream.
@@ -1567,7 +1566,7 @@ abstract mixin class Stream<T> {
   /// stream.forEach(print); // Skips events 0, ..., 6. Outputs events: 7, ...
   /// ```
   Stream<T> skip(int count) {
-    return new _SkipStream<T>(this, count);
+    return _SkipStream<T>(this, count);
   }
 
   /// Skip data events from this stream while they are matched by [test].
@@ -1595,7 +1594,7 @@ abstract mixin class Stream<T> {
   /// stream.forEach(print); // Outputs events: 5, ..., 9.
   /// ```
   Stream<T> skipWhile(bool test(T element)) {
-    return new _SkipWhileStream<T>(this, test);
+    return _SkipWhileStream<T>(this, test);
   }
 
   /// Skips data events if they are equal to the previous data event.
@@ -1624,7 +1623,7 @@ abstract mixin class Stream<T> {
   /// stream.forEach(print); // Outputs events: 2,6,8,12,8,2.
   /// ```
   Stream<T> distinct([bool equals(T previous, T next)?]) {
-    return new _DistinctStream<T>(this, equals);
+    return _DistinctStream<T>(this, equals);
   }
 
   /// The first element of this stream.
@@ -1644,7 +1643,7 @@ abstract mixin class Stream<T> {
   /// Except for the type of the error, this method is equivalent to
   /// `this.elementAt(0)`.
   Future<T> get first {
-    _Future<T> future = new _Future<T>();
+    _Future<T> future = _Future<T>();
     StreamSubscription<T> subscription = this.listen(
       null,
       onError: future._completeError,
@@ -1671,7 +1670,7 @@ abstract mixin class Stream<T> {
   /// If this stream is empty (the done event is the first event),
   /// the returned future completes with an error.
   Future<T> get last {
-    _Future<T> future = new _Future<T>();
+    _Future<T> future = _Future<T>();
     late T result;
     bool foundResult = false;
     listen(
@@ -1704,7 +1703,7 @@ abstract mixin class Stream<T> {
   /// If this [Stream] is empty or has more than one element,
   /// the returned future completes with an error.
   Future<T> get single {
-    _Future<T> future = new _Future<T>();
+    _Future<T> future = _Future<T>();
     late T result;
     bool foundResult = false;
     StreamSubscription<T> subscription = this.listen(
@@ -1774,7 +1773,7 @@ abstract mixin class Stream<T> {
   /// print(result); // -1
   /// ```
   Future<T> firstWhere(bool test(T element), {T orElse()?}) {
-    _Future<T> future = new _Future();
+    _Future<T> future = _Future();
     StreamSubscription<T> subscription = this.listen(
       null,
       onError: future._completeError,
@@ -1827,7 +1826,7 @@ abstract mixin class Stream<T> {
   /// print(result); // -1
   /// ```
   Future<T> lastWhere(bool test(T element), {T orElse()?}) {
-    _Future<T> future = new _Future();
+    _Future<T> future = _Future();
     late T result;
     bool foundResult = false;
     StreamSubscription<T> subscription = this.listen(
@@ -1894,7 +1893,7 @@ abstract mixin class Stream<T> {
   /// // Throws.
   /// ```
   Future<T> singleWhere(bool test(T element), {T orElse()?}) {
-    _Future<T> future = new _Future<T>();
+    _Future<T> future = _Future<T>();
     late T result;
     bool foundResult = false;
     StreamSubscription<T> subscription = this.listen(
@@ -1951,7 +1950,7 @@ abstract mixin class Stream<T> {
   /// with a [RangeError].
   Future<T> elementAt(int index) {
     RangeError.checkNotNegative(index, "index");
-    _Future<T> result = new _Future<T>();
+    _Future<T> result = _Future<T>();
     int elementIndex = 0;
     StreamSubscription<T> subscription;
     subscription = this.listen(
@@ -1959,7 +1958,7 @@ abstract mixin class Stream<T> {
       onError: result._completeError,
       onDone: () {
         result._completeError(
-          new IndexError.withLength(
+          IndexError.withLength(
             index,
             elementIndex,
             indexable: this,
@@ -2035,9 +2034,9 @@ abstract mixin class Stream<T> {
   Stream<T> timeout(Duration timeLimit, {void onTimeout(EventSink<T> sink)?}) {
     _StreamControllerBase<T> controller;
     if (isBroadcast) {
-      controller = new _SyncBroadcastStreamController<T>(null, null);
+      controller = _SyncBroadcastStreamController<T>(null, null);
     } else {
-      controller = new _SyncStreamController<T>(null, null, null, null);
+      controller = _SyncStreamController<T>(null, null, null, null);
     }
 
     Zone zone = Zone.current;
@@ -2046,7 +2045,7 @@ abstract mixin class Stream<T> {
     if (onTimeout == null) {
       timeoutCallback = () {
         controller.addError(
-          new TimeoutException("No stream event", timeLimit),
+          TimeoutException("No stream event", timeLimit),
           null,
         );
       };
@@ -2054,7 +2053,7 @@ abstract mixin class Stream<T> {
       var registeredOnTimeout = zone.registerUnaryCallback<void, EventSink<T>>(
         onTimeout,
       );
-      var wrapper = new _ControllerEventSinkWrapper<T>(null);
+      var wrapper = _ControllerEventSinkWrapper<T>(null);
       timeoutCallback = () {
         wrapper._sink = controller; // Only valid during call.
         zone.runUnaryGuarded(registeredOnTimeout, wrapper);
@@ -2626,7 +2625,7 @@ abstract interface class StreamTransformer<S, T> {
   static StreamTransformer<TS, TT> castFrom<SS, ST, TS, TT>(
     StreamTransformer<SS, ST> source,
   ) {
-    return new CastStreamTransformer<SS, ST, TS, TT>(source);
+    return CastStreamTransformer<SS, ST, TS, TT>(source);
   }
 
   /// Transforms the provided [stream].
@@ -2692,7 +2691,7 @@ abstract interface class StreamIterator<T> {
   factory StreamIterator(Stream<T> stream) =>
   // TODO(lrn): use redirecting factory constructor when type
   // arguments are supported.
-  new _StreamIterator<T>(stream);
+  _StreamIterator<T>(stream);
 
   /// Wait for the next stream value to be available.
   ///

sdk/lib/async/stream_transformers.dart

@@ -74,7 +74,7 @@ class _SinkTransformerStreamSubscription<S, T>
   /// error.
   void _addError(Object error, StackTrace stackTrace) {
     if (_isClosed) {
-      throw new StateError("Stream is already closed");
+      throw StateError("Stream is already closed");
     }
     super._addError(error, stackTrace);
   }
@@ -86,7 +86,7 @@ class _SinkTransformerStreamSubscription<S, T>
   /// error.
   void _close() {
     if (_isClosed) {
-      throw new StateError("Stream is already closed");
+      throw StateError("Stream is already closed");
     }
     super._close();
   }
@@ -153,7 +153,7 @@ class _StreamSinkTransformer<S, T> extends StreamTransformerBase<S, T> {
   const _StreamSinkTransformer(this._sinkMapper);
 
   Stream<T> bind(Stream<S> stream) =>
-      new _BoundSinkStream<S, T>(stream, _sinkMapper);
+      _BoundSinkStream<S, T>(stream, _sinkMapper);
 }
 
 /// The result of binding a [StreamTransformer] for [Sink]-mappers.
@@ -269,7 +269,7 @@ class _StreamHandlerTransformer<S, T> extends _StreamSinkTransformer<S, T> {
     void handleError(Object error, StackTrace stackTrace, EventSink<T> sink)?,
     void handleDone(EventSink<T> sink)?,
   }) : super((EventSink<T> outputSink) {
-         return new _HandlerEventSink<S, T>(
+         return _HandlerEventSink<S, T>(
            handleData,
            handleError,
            handleDone,
@@ -312,7 +312,7 @@ class _StreamSubscriptionTransformer<S, T> extends StreamTransformerBase<S, T> {
   const _StreamSubscriptionTransformer(this._onListen);
 
   Stream<T> bind(Stream<S> stream) =>
-      new _BoundSubscriptionStream<S, T>(stream, _onListen);
+      _BoundSubscriptionStream<S, T>(stream, _onListen);
 }
 
 /// A stream transformed by a [_StreamSubscriptionTransformer].

sdk/lib/async/timer.dart

@@ -104,7 +104,7 @@ abstract interface class Timer {
   /// Timer.run(() => print('timer run'));
   /// ```
   static void run(void Function() callback) {
-    new Timer(Duration.zero, callback);
+    Timer(Duration.zero, callback);
   }
 
   /// Cancels the timer.

sdk/lib/core/stacktrace.dart

@@ -16,7 +16,7 @@ abstract interface class StackTrace {
   ///
   /// This stack trace is used as the default in situations where
   /// a stack trace is required, but the user has not supplied one.
-  static const empty = const _StringStackTrace("");
+  static const empty = _StringStackTrace("");
 
   StackTrace(); // In case existing classes extend StackTrace.
 

sdk/lib/internal/async_cast.dart

@@ -17,14 +17,14 @@ class CastStream<S, T> extends Stream<T> {
     void Function()? onDone,
     bool? cancelOnError,
   }) {
-    return new CastStreamSubscription<S, T>(
+    return CastStreamSubscription<S, T>(
         _source.listen(null, onDone: onDone, cancelOnError: cancelOnError),
       )
       ..onData(onData)
       ..onError(onError);
   }
 
-  Stream<R> cast<R>() => new CastStream<S, R>(_source);
+  Stream<R> cast<R>() => CastStream<S, R>(_source);
 }
 
 class CastStreamSubscription<S, T> implements StreamSubscription<T> {
@@ -115,7 +115,7 @@ class CastStreamTransformer<SS, ST, TS, TT>
   CastStreamTransformer(this._source);
 
   StreamTransformer<RS, RT> cast<RS, RT>() =>
-      new CastStreamTransformer<SS, ST, RS, RT>(_source);
+      CastStreamTransformer<SS, ST, RS, RT>(_source);
   Stream<TT> bind(Stream<TS> stream) =>
       _source.bind(stream.cast<SS>()).cast<TT>();
 }
@@ -131,6 +131,5 @@ class CastConverter<SS, ST, TS, TT> extends Converter<TS, TT> {
   Stream<TT> bind(Stream<TS> stream) =>
       _source.bind(stream.cast<SS>()).cast<TT>();
 
-  Converter<RS, RT> cast<RS, RT>() =>
-      new CastConverter<SS, ST, RS, RT>(_source);
+  Converter<RS, RT> cast<RS, RT>() => CastConverter<SS, ST, RS, RT>(_source);
 }

sdk/lib/internal/cast.dart

@@ -9,7 +9,7 @@ part of dart._internal;
 abstract class _CastIterableBase<S, T> extends Iterable<T> {
   Iterable<S> get _source;
 
-  Iterator<T> get iterator => new CastIterator<S, T>(_source.iterator);
+  Iterator<T> get iterator => CastIterator<S, T>(_source.iterator);
 
   // The following members use the default implementation on the
   // throwing iterator. These are all operations that have no more efficient
@@ -36,8 +36,8 @@ abstract class _CastIterableBase<S, T> extends Iterable<T> {
   bool get isEmpty => _source.isEmpty;
   bool get isNotEmpty => _source.isNotEmpty;
 
-  Iterable<T> skip(int count) => new CastIterable<S, T>(_source.skip(count));
-  Iterable<T> take(int count) => new CastIterable<S, T>(_source.take(count));
+  Iterable<T> skip(int count) => CastIterable<S, T>(_source.skip(count));
+  Iterable<T> take(int count) => CastIterable<S, T>(_source.take(count));
 
   T elementAt(int index) => _source.elementAt(index) as T;
   T get first => _source.first as T;
@@ -72,12 +72,12 @@ class CastIterable<S, T> extends _CastIterableBase<S, T> {
 
   factory CastIterable(Iterable<S> source) {
     if (source is EfficientLengthIterable<S>) {
-      return new _EfficientLengthCastIterable<S, T>(source);
+      return _EfficientLengthCastIterable<S, T>(source);
     }
-    return new CastIterable<S, T>._(source);
+    return CastIterable<S, T>._(source);
   }
 
-  Iterable<R> cast<R>() => new CastIterable<S, R>(_source);
+  Iterable<R> cast<R>() => CastIterable<S, R>(_source);
 }
 
 class _EfficientLengthCastIterable<S, T> extends CastIterable<S, T>
@@ -114,7 +114,7 @@ abstract class _CastListBase<S, T> extends _CastIterableBase<S, T>
   }
 
   void addAll(Iterable<T> values) {
-    _source.addAll(new CastIterable<T, S>(values));
+    _source.addAll(CastIterable<T, S>(values));
   }
 
   void sort([int Function(T v1, T v2)? compare]) {
@@ -132,11 +132,11 @@ abstract class _CastListBase<S, T> extends _CastIterableBase<S, T>
   }
 
   void insertAll(int index, Iterable<T> elements) {
-    _source.insertAll(index, new CastIterable<T, S>(elements));
+    _source.insertAll(index, CastIterable<T, S>(elements));
   }
 
   void setAll(int index, Iterable<T> elements) {
-    _source.setAll(index, new CastIterable<T, S>(elements));
+    _source.setAll(index, CastIterable<T, S>(elements));
   }
 
   bool remove(Object? value) => _source.remove(value);
@@ -154,10 +154,10 @@ abstract class _CastListBase<S, T> extends _CastIterableBase<S, T>
   }
 
   Iterable<T> getRange(int start, int end) =>
-      new CastIterable<S, T>(_source.getRange(start, end));
+      CastIterable<S, T>(_source.getRange(start, end));
 
   void setRange(int start, int end, Iterable<T> iterable, [int skipCount = 0]) {
-    _source.setRange(start, end, new CastIterable<T, S>(iterable), skipCount);
+    _source.setRange(start, end, CastIterable<T, S>(iterable), skipCount);
   }
 
   void removeRange(int start, int end) {
@@ -169,7 +169,7 @@ abstract class _CastListBase<S, T> extends _CastIterableBase<S, T>
   }
 
   void replaceRange(int start, int end, Iterable<T> replacement) {
-    _source.replaceRange(start, end, new CastIterable<T, S>(replacement));
+    _source.replaceRange(start, end, CastIterable<T, S>(replacement));
   }
 }
 
@@ -177,7 +177,7 @@ class CastList<S, T> extends _CastListBase<S, T> {
   final List<S> _source;
   CastList(this._source);
 
-  List<R> cast<R>() => new CastList<S, R>(_source);
+  List<R> cast<R>() => CastList<S, R>(_source);
 }
 
 class CastSet<S, T> extends _CastIterableBase<S, T> implements Set<T> {
@@ -190,11 +190,11 @@ class CastSet<S, T> extends _CastIterableBase<S, T> implements Set<T> {
 
   CastSet(this._source, this._emptySet);
 
-  Set<R> cast<R>() => new CastSet<S, R>(_source, _emptySet);
+  Set<R> cast<R>() => CastSet<S, R>(_source, _emptySet);
   bool add(T value) => _source.add(value as S);
 
   void addAll(Iterable<T> elements) {
-    _source.addAll(new CastIterable<T, S>(elements));
+    _source.addAll(CastIterable<T, S>(elements));
   }
 
   bool remove(Object? object) => _source.remove(object);
@@ -219,17 +219,17 @@ class CastSet<S, T> extends _CastIterableBase<S, T> implements Set<T> {
 
   Set<T> intersection(Set<Object?> other) {
     if (_emptySet != null) return _conditionalAdd(other, true);
-    return new CastSet<S, T>(_source.intersection(other), null);
+    return CastSet<S, T>(_source.intersection(other), null);
   }
 
   Set<T> difference(Set<Object?> other) {
     if (_emptySet != null) return _conditionalAdd(other, false);
-    return new CastSet<S, T>(_source.difference(other), null);
+    return CastSet<S, T>(_source.difference(other), null);
   }
 
   Set<T> _conditionalAdd(Set<Object?> other, bool otherContains) {
     var emptySet = _emptySet;
-    Set<T> result = (emptySet == null) ? new Set<T>() : emptySet<T>();
+    Set<T> result = (emptySet == null) ? Set<T>() : emptySet<T>();
     for (var element in _source) {
       T castElement = element as T;
       if (otherContains == other.contains(castElement)) result.add(castElement);
@@ -245,7 +245,7 @@ class CastSet<S, T> extends _CastIterableBase<S, T> implements Set<T> {
 
   Set<T> _clone() {
     var emptySet = _emptySet;
-    Set<T> result = (emptySet == null) ? new Set<T>() : emptySet<T>();
+    Set<T> result = (emptySet == null) ? Set<T>() : emptySet<T>();
     result.addAll(this);
     return result;
   }
@@ -260,7 +260,7 @@ class CastMap<SK, SV, K, V> extends MapBase<K, V> {
 
   CastMap(this._source);
 
-  Map<RK, RV> cast<RK, RV>() => new CastMap<SK, SV, RK, RV>(_source);
+  Map<RK, RV> cast<RK, RV>() => CastMap<SK, SV, RK, RV>(_source);
 
   bool containsValue(Object? value) => _source.containsValue(value);
 
@@ -276,7 +276,7 @@ class CastMap<SK, SV, K, V> extends MapBase<K, V> {
       _source.putIfAbsent(key as SK, () => ifAbsent() as SV) as V;
 
   void addAll(Map<K, V> other) {
-    _source.addAll(new CastMap<K, V, SK, SV>(other));
+    _source.addAll(CastMap<K, V, SK, SV>(other));
   }
 
   V? remove(Object? key) => _source.remove(key) as V?;
@@ -291,9 +291,9 @@ class CastMap<SK, SV, K, V> extends MapBase<K, V> {
     });
   }
 
-  Iterable<K> get keys => new CastIterable<SK, K>(_source.keys);
+  Iterable<K> get keys => CastIterable<SK, K>(_source.keys);
 
-  Iterable<V> get values => new CastIterable<SV, V>(_source.values);
+  Iterable<V> get values => CastIterable<SV, V>(_source.values);
 
   int get length => _source.length;
 
@@ -316,7 +316,7 @@ class CastMap<SK, SV, K, V> extends MapBase<K, V> {
 
   Iterable<MapEntry<K, V>> get entries {
     return _source.entries.map<MapEntry<K, V>>(
-      (MapEntry<SK, SV> e) => new MapEntry<K, V>(e.key as K, e.value as V),
+      (MapEntry<SK, SV> e) => MapEntry<K, V>(e.key as K, e.value as V),
     );
   }
 
@@ -334,7 +334,7 @@ class CastMap<SK, SV, K, V> extends MapBase<K, V> {
 class CastQueue<S, T> extends _CastIterableBase<S, T> implements Queue<T> {
   final Queue<S> _source;
   CastQueue(this._source);
-  Queue<R> cast<R>() => new CastQueue<S, R>(_source);
+  Queue<R> cast<R>() => CastQueue<S, R>(_source);
 
   T removeFirst() => _source.removeFirst() as T;
   T removeLast() => _source.removeLast() as T;
@@ -353,7 +353,7 @@ class CastQueue<S, T> extends _CastIterableBase<S, T> implements Queue<T> {
 
   bool remove(Object? other) => _source.remove(other);
   void addAll(Iterable<T> elements) {
-    _source.addAll(new CastIterable<T, S>(elements));
+    _source.addAll(CastIterable<T, S>(elements));
   }
 
   void removeWhere(bool test(T element)) {

sdk/lib/internal/internal.dart

@@ -57,7 +57,7 @@ external T unsafeCast<T>(dynamic value);
 // Powers of 10 up to 10^22 are representable as doubles.
 // Powers of 10 above that are only approximate due to lack of precision.
 // Used by double-parsing.
-const POWERS_OF_TEN = const [
+const POWERS_OF_TEN = [
   1.0, // 0
   10.0,
   100.0,
@@ -742,7 +742,7 @@ class SentinelValue {
 }
 
 /// A default value to use when only one sentinel is needed.
-const Object sentinelValue = const SentinelValue(0);
+const Object sentinelValue = SentinelValue(0);
 
 /// Given an [instance] of some generic type [T], and [extract], a first-class
 /// generic function that takes the same number of type parameters as [T],

sdk/lib/internal/linked_list.dart

@@ -75,7 +75,7 @@ class LinkedList<T extends LinkedListEntry<T>> extends Iterable<T> {
     node._list = null;
   }
 
-  Iterator<T> get iterator => new _LinkedListIterator<T>(this);
+  Iterator<T> get iterator => _LinkedListIterator<T>(this);
 }
 
 class LinkedListEntry<T extends LinkedListEntry<T>> {

sdk/lib/internal/list.dart

@@ -12,69 +12,67 @@ part of dart._internal;
 mixin FixedLengthListMixin<E> {
   /** This operation is not supported by a fixed length list. */
   set length(int newLength) {
-    throw new UnsupportedError(
-      "Cannot change the length of a fixed-length list",
-    );
+    throw UnsupportedError("Cannot change the length of a fixed-length list");
   }
 
   /** This operation is not supported by a fixed length list. */
   void add(E value) {
-    throw new UnsupportedError("Cannot add to a fixed-length list");
+    throw UnsupportedError("Cannot add to a fixed-length list");
   }
 
   /** This operation is not supported by a fixed length list. */
   void insert(int index, E value) {
-    throw new UnsupportedError("Cannot add to a fixed-length list");
+    throw UnsupportedError("Cannot add to a fixed-length list");
   }
 
   /** This operation is not supported by a fixed length list. */
   void insertAll(int at, Iterable<E> iterable) {
-    throw new UnsupportedError("Cannot add to a fixed-length list");
+    throw UnsupportedError("Cannot add to a fixed-length list");
   }
 
   /** This operation is not supported by a fixed length list. */
   void addAll(Iterable<E> iterable) {
-    throw new UnsupportedError("Cannot add to a fixed-length list");
+    throw UnsupportedError("Cannot add to a fixed-length list");
   }
 
   /** This operation is not supported by a fixed length list. */
   bool remove(Object? element) {
-    throw new UnsupportedError("Cannot remove from a fixed-length list");
+    throw UnsupportedError("Cannot remove from a fixed-length list");
   }
 
   /** This operation is not supported by a fixed length list. */
   void removeWhere(bool test(E element)) {
-    throw new UnsupportedError("Cannot remove from a fixed-length list");
+    throw UnsupportedError("Cannot remove from a fixed-length list");
   }
 
   /** This operation is not supported by a fixed length list. */
   void retainWhere(bool test(E element)) {
-    throw new UnsupportedError("Cannot remove from a fixed-length list");
+    throw UnsupportedError("Cannot remove from a fixed-length list");
   }
 
   /** This operation is not supported by a fixed length list. */
   void clear() {
-    throw new UnsupportedError("Cannot clear a fixed-length list");
+    throw UnsupportedError("Cannot clear a fixed-length list");
   }
 
   /** This operation is not supported by a fixed length list. */
   E removeAt(int index) {
-    throw new UnsupportedError("Cannot remove from a fixed-length list");
+    throw UnsupportedError("Cannot remove from a fixed-length list");
   }
 
   /** This operation is not supported by a fixed length list. */
   E removeLast() {
-    throw new UnsupportedError("Cannot remove from a fixed-length list");
+    throw UnsupportedError("Cannot remove from a fixed-length list");
   }
 
   /** This operation is not supported by a fixed length list. */
   void removeRange(int start, int end) {
-    throw new UnsupportedError("Cannot remove from a fixed-length list");
+    throw UnsupportedError("Cannot remove from a fixed-length list");
   }
 
   /** This operation is not supported by a fixed length list. */
   void replaceRange(int start, int end, Iterable<E> iterable) {
-    throw new UnsupportedError("Cannot remove from a fixed-length list");
+    throw UnsupportedError("Cannot remove from a fixed-length list");
   }
 }
 
@@ -88,107 +86,105 @@ mixin FixedLengthListMixin<E> {
 mixin UnmodifiableListMixin<E> implements List<E> {
   /** This operation is not supported by an unmodifiable list. */
   void operator []=(int index, E value) {
-    throw new UnsupportedError("Cannot modify an unmodifiable list");
+    throw UnsupportedError("Cannot modify an unmodifiable list");
   }
 
   /** This operation is not supported by an unmodifiable list. */
   set length(int newLength) {
-    throw new UnsupportedError(
-      "Cannot change the length of an unmodifiable list",
-    );
+    throw UnsupportedError("Cannot change the length of an unmodifiable list");
   }
 
   set first(E element) {
-    throw new UnsupportedError("Cannot modify an unmodifiable list");
+    throw UnsupportedError("Cannot modify an unmodifiable list");
   }
 
   set last(E element) {
-    throw new UnsupportedError("Cannot modify an unmodifiable list");
+    throw UnsupportedError("Cannot modify an unmodifiable list");
   }
 
   /** This operation is not supported by an unmodifiable list. */
   void setAll(int at, Iterable<E> iterable) {
-    throw new UnsupportedError("Cannot modify an unmodifiable list");
+    throw UnsupportedError("Cannot modify an unmodifiable list");
   }
 
   /** This operation is not supported by an unmodifiable list. */
   void add(E value) {
-    throw new UnsupportedError("Cannot add to an unmodifiable list");
+    throw UnsupportedError("Cannot add to an unmodifiable list");
   }
 
   /** This operation is not supported by an unmodifiable list. */
   void insert(int index, E element) {
-    throw new UnsupportedError("Cannot add to an unmodifiable list");
+    throw UnsupportedError("Cannot add to an unmodifiable list");
   }
 
   /** This operation is not supported by an unmodifiable list. */
   void insertAll(int at, Iterable<E> iterable) {
-    throw new UnsupportedError("Cannot add to an unmodifiable list");
+    throw UnsupportedError("Cannot add to an unmodifiable list");
   }
 
   /** This operation is not supported by an unmodifiable list. */
   void addAll(Iterable<E> iterable) {
-    throw new UnsupportedError("Cannot add to an unmodifiable list");
+    throw UnsupportedError("Cannot add to an unmodifiable list");
   }
 
   /** This operation is not supported by an unmodifiable list. */
   bool remove(Object? element) {
-    throw new UnsupportedError("Cannot remove from an unmodifiable list");
+    throw UnsupportedError("Cannot remove from an unmodifiable list");
   }
 
   /** This operation is not supported by an unmodifiable list. */
   void removeWhere(bool test(E element)) {
-    throw new UnsupportedError("Cannot remove from an unmodifiable list");
+    throw UnsupportedError("Cannot remove from an unmodifiable list");
   }
 
   /** This operation is not supported by an unmodifiable list. */
   void retainWhere(bool test(E element)) {
-    throw new UnsupportedError("Cannot remove from an unmodifiable list");
+    throw UnsupportedError("Cannot remove from an unmodifiable list");
   }
 
   /** This operation is not supported by an unmodifiable list. */
   void sort([Comparator<E>? compare]) {
-    throw new UnsupportedError("Cannot modify an unmodifiable list");
+    throw UnsupportedError("Cannot modify an unmodifiable list");
   }
 
   /** This operation is not supported by an unmodifiable list. */
   void shuffle([Random? random]) {
-    throw new UnsupportedError("Cannot modify an unmodifiable list");
+    throw UnsupportedError("Cannot modify an unmodifiable list");
   }
 
   /** This operation is not supported by an unmodifiable list. */
   void clear() {
-    throw new UnsupportedError("Cannot clear an unmodifiable list");
+    throw UnsupportedError("Cannot clear an unmodifiable list");
   }
 
   /** This operation is not supported by an unmodifiable list. */
   E removeAt(int index) {
-    throw new UnsupportedError("Cannot remove from an unmodifiable list");
+    throw UnsupportedError("Cannot remove from an unmodifiable list");
   }
 
   /** This operation is not supported by an unmodifiable list. */
   E removeLast() {
-    throw new UnsupportedError("Cannot remove from an unmodifiable list");
+    throw UnsupportedError("Cannot remove from an unmodifiable list");
   }
 
   /** This operation is not supported by an unmodifiable list. */
   void setRange(int start, int end, Iterable<E> iterable, [int skipCount = 0]) {
-    throw new UnsupportedError("Cannot modify an unmodifiable list");
+    throw UnsupportedError("Cannot modify an unmodifiable list");
   }
 
   /** This operation is not supported by an unmodifiable list. */
   void removeRange(int start, int end) {
-    throw new UnsupportedError("Cannot remove from an unmodifiable list");
+    throw UnsupportedError("Cannot remove from an unmodifiable list");
   }
 
   /** This operation is not supported by an unmodifiable list. */
   void replaceRange(int start, int end, Iterable<E> iterable) {
-    throw new UnsupportedError("Cannot remove from an unmodifiable list");
+    throw UnsupportedError("Cannot remove from an unmodifiable list");
   }
 
   /** This operation is not supported by an unmodifiable list. */
   void fillRange(int start, int end, [E? fillValue]) {
-    throw new UnsupportedError("Cannot modify an unmodifiable list");
+    throw UnsupportedError("Cannot modify an unmodifiable list");
   }
 }
 
@@ -230,8 +226,8 @@ class ListMapView<E> extends UnmodifiableMapBase<int, E> {
   E? operator [](Object? key) => containsKey(key) ? _values[key as int] : null;
   int get length => _values.length;
 
-  Iterable<E> get values => new SubListIterable<E>(_values, 0, null);
-  Iterable<int> get keys => new _ListIndicesIterable(_values);
+  Iterable<E> get values => SubListIterable<E>(_values, 0, null);
+  Iterable<int> get keys => _ListIndicesIterable(_values);
 
   bool get isEmpty => _values.isEmpty;
   bool get isNotEmpty => _values.isNotEmpty;
@@ -243,7 +239,7 @@ class ListMapView<E> extends UnmodifiableMapBase<int, E> {
     for (int i = 0; i < length; i++) {
       f(i, _values[i]);
       if (length != _values.length) {
-        throw new ConcurrentModificationError(_values);
+        throw ConcurrentModificationError(_values);
       }
     }
   }
@@ -266,19 +262,19 @@ final class ReversedListIterable<E> extends ListIterable<E> {
 abstract class UnmodifiableListError {
   /** Error thrown when trying to add elements to an unmodifiable list. */
   static UnsupportedError add() =>
-      new UnsupportedError("Cannot add to unmodifiable List");
+      UnsupportedError("Cannot add to unmodifiable List");
 
   /** Error thrown when trying to add elements to an unmodifiable list. */
   static UnsupportedError change() =>
-      new UnsupportedError("Cannot change the content of an unmodifiable List");
+      UnsupportedError("Cannot change the content of an unmodifiable List");
 
   /** Error thrown when trying to change the length of an unmodifiable list. */
   static UnsupportedError length() =>
-      new UnsupportedError("Cannot change length of unmodifiable List");
+      UnsupportedError("Cannot change length of unmodifiable List");
 
   /** Error thrown when trying to remove elements from an unmodifiable list. */
   static UnsupportedError remove() =>
-      new UnsupportedError("Cannot remove from unmodifiable List");
+      UnsupportedError("Cannot remove from unmodifiable List");
 }
 
 /**
@@ -289,15 +285,15 @@ abstract class UnmodifiableListError {
 abstract class NonGrowableListError {
   /** Error thrown when trying to add elements to an non-growable list. */
   static UnsupportedError add() =>
-      new UnsupportedError("Cannot add to non-growable List");
+      UnsupportedError("Cannot add to non-growable List");
 
   /** Error thrown when trying to change the length of an non-growable list. */
   static UnsupportedError length() =>
-      new UnsupportedError("Cannot change length of non-growable List");
+      UnsupportedError("Cannot change length of non-growable List");
 
   /** Error thrown when trying to remove elements from an non-growable list. */
   static UnsupportedError remove() =>
-      new UnsupportedError("Cannot remove from non-growable List");
+      UnsupportedError("Cannot remove from non-growable List");
 }
 
 /**

sdk/lib/io/common.dart

@@ -92,7 +92,7 @@ class OSError implements Exception {
 
   /// Converts an OSError object to a string representation.
   String toString() {
-    StringBuffer sb = new StringBuffer();
+    StringBuffer sb = StringBuffer();
     sb.write("OS Error");
     if (message.isNotEmpty) {
       sb
@@ -129,12 +129,12 @@ _BufferAndStart _ensureFastAndSerializableByteData(
     // Send typed data directly, unless it is a partial view, in which case we
     // would rather copy than drag in the potentially much large backing store.
     // See issue 50206.
-    return new _BufferAndStart(buffer, start);
+    return _BufferAndStart(buffer, start);
   }
   int length = end - start;
-  var newBuffer = new Uint8List(length);
+  var newBuffer = Uint8List(length);
   newBuffer.setRange(0, length, buffer, start);
-  return new _BufferAndStart(newBuffer, 0);
+  return _BufferAndStart(newBuffer, 0);
 }
 
 class _IOCrypto {

sdk/lib/io/data_transformer.dart

@@ -56,7 +56,7 @@ abstract final class ZLibOption {
 }
 
 /// An instance of the default implementation of the [ZLibCodec].
-const ZLibCodec zlib = const ZLibCodec._default();
+const ZLibCodec zlib = ZLibCodec._default();
 
 /// The [ZLibCodec] encodes raw bytes to ZLib compressed bytes and decodes ZLib
 /// compressed bytes to raw bytes.
@@ -131,7 +131,7 @@ final class ZLibCodec extends Codec<List<int>, List<int>> {
       dictionary = null;
 
   /// Get a [ZLibEncoder] for encoding to `ZLib` compressed data.
-  ZLibEncoder get encoder => new ZLibEncoder(
+  ZLibEncoder get encoder => ZLibEncoder(
     gzip: false,
     level: level,
     windowBits: windowBits,
@@ -143,11 +143,11 @@ final class ZLibCodec extends Codec<List<int>, List<int>> {
 
   /// Get a [ZLibDecoder] for decoding `ZLib` compressed data.
   ZLibDecoder get decoder =>
-      new ZLibDecoder(windowBits: windowBits, dictionary: dictionary, raw: raw);
+      ZLibDecoder(windowBits: windowBits, dictionary: dictionary, raw: raw);
 }
 
 /// An instance of the default implementation of the [GZipCodec].
-const GZipCodec gzip = const GZipCodec._default();
+const GZipCodec gzip = GZipCodec._default();
 
 /// The [GZipCodec] encodes raw bytes to GZip compressed bytes and decodes GZip
 /// compressed bytes to raw bytes.
@@ -224,7 +224,7 @@ final class GZipCodec extends Codec<List<int>, List<int>> {
       dictionary = null;
 
   /// Get a [ZLibEncoder] for encoding to `GZip` compressed data.
-  ZLibEncoder get encoder => new ZLibEncoder(
+  ZLibEncoder get encoder => ZLibEncoder(
     gzip: true,
     level: level,
     windowBits: windowBits,
@@ -235,7 +235,7 @@ final class GZipCodec extends Codec<List<int>, List<int>> {
   );
 
   /// Get a [ZLibDecoder] for decoding `GZip` compressed data.
-  ZLibDecoder get decoder => new ZLibDecoder(
+  ZLibDecoder get decoder => ZLibDecoder(
     gzip: true,
     windowBits: windowBits,
     dictionary: dictionary,
@@ -311,7 +311,7 @@ final class ZLibEncoder extends Converter<List<int>, List<int>> {
   /// Convert a list of bytes using the options given to the ZLibEncoder
   /// constructor.
   List<int> convert(List<int> bytes) {
-    _BufferSink sink = new _BufferSink();
+    _BufferSink sink = _BufferSink();
     startChunkedConversion(sink)
       ..add(bytes)
       ..close();
@@ -326,9 +326,9 @@ final class ZLibEncoder extends Converter<List<int>, List<int>> {
   /// using it.
   ByteConversionSink startChunkedConversion(Sink<List<int>> sink) {
     if (sink is! ByteConversionSink) {
-      sink = new ByteConversionSink.from(sink);
+      sink = ByteConversionSink.from(sink);
     }
-    return new _ZLibEncoderSink._(
+    return _ZLibEncoderSink._(
       sink,
       gzip,
       level,
@@ -378,7 +378,7 @@ final class ZLibDecoder extends Converter<List<int>, List<int>> {
   /// Convert a list of bytes using the options given to the [ZLibDecoder]
   /// constructor.
   List<int> convert(List<int> bytes) {
-    _BufferSink sink = new _BufferSink();
+    _BufferSink sink = _BufferSink();
     startChunkedConversion(sink)
       ..add(bytes)
       ..close();
@@ -392,9 +392,9 @@ final class ZLibDecoder extends Converter<List<int>, List<int>> {
   /// using it.
   ByteConversionSink startChunkedConversion(Sink<List<int>> sink) {
     if (sink is! ByteConversionSink) {
-      sink = new ByteConversionSink.from(sink);
+      sink = ByteConversionSink.from(sink);
     }
-    return new _ZLibDecoderSink._(sink, gzip, windowBits, dictionary, raw);
+    return _ZLibDecoderSink._(sink, gzip, windowBits, dictionary, raw);
   }
 }
 
@@ -468,7 +468,7 @@ abstract interface class RawZLibFilter {
 }
 
 class _BufferSink extends ByteConversionSink {
-  final BytesBuilder builder = new BytesBuilder(copy: false);
+  final BytesBuilder builder = BytesBuilder(copy: false);
 
   void add(List<int> chunk) {
     builder.add(chunk);
@@ -478,11 +478,7 @@ class _BufferSink extends ByteConversionSink {
     if (chunk is Uint8List) {
       Uint8List list = chunk;
       builder.add(
-        new Uint8List.view(
-          list.buffer,
-          list.offsetInBytes + start,
-          end - start,
-        ),
+        Uint8List.view(list.buffer, list.offsetInBytes + start, end - start),
       );
     } else {
       builder.add(chunk.sublist(start, end));
@@ -594,7 +590,7 @@ class _FilterSink extends ByteConversionSink {
 void _validateZLibWindowBits(int windowBits) {
   if (ZLibOption.minWindowBits > windowBits ||
       ZLibOption.maxWindowBits < windowBits) {
-    throw new RangeError.range(
+    throw RangeError.range(
       windowBits,
       ZLibOption.minWindowBits,
       ZLibOption.maxWindowBits,
@@ -604,13 +600,13 @@ void _validateZLibWindowBits(int windowBits) {
 
 void _validateZLibeLevel(int level) {
   if (ZLibOption.minLevel > level || ZLibOption.maxLevel < level) {
-    throw new RangeError.range(level, ZLibOption.minLevel, ZLibOption.maxLevel);
+    throw RangeError.range(level, ZLibOption.minLevel, ZLibOption.maxLevel);
   }
 }
 
 void _validateZLibMemLevel(int memLevel) {
   if (ZLibOption.minMemLevel > memLevel || ZLibOption.maxMemLevel < memLevel) {
-    throw new RangeError.range(
+    throw RangeError.range(
       memLevel,
       ZLibOption.minMemLevel,
       ZLibOption.maxMemLevel,
@@ -619,7 +615,7 @@ void _validateZLibMemLevel(int memLevel) {
 }
 
 void _validateZLibStrategy(int strategy) {
-  const strategies = const <int>[
+  const strategies = <int>[
     ZLibOption.strategyFiltered,
     ZLibOption.strategyHuffmanOnly,
     ZLibOption.strategyRle,
@@ -627,6 +623,6 @@ void _validateZLibStrategy(int strategy) {
     ZLibOption.strategyDefault,
   ];
   if (strategies.indexOf(strategy) == -1) {
-    throw new ArgumentError("Unsupported 'strategy'");
+    throw ArgumentError("Unsupported 'strategy'");
   }
 }

sdk/lib/io/directory.dart

@@ -112,7 +112,7 @@ abstract interface class Directory implements FileSystemEntity {
   factory Directory(String path) {
     final IOOverrides? overrides = IOOverrides.current;
     if (overrides == null) {
-      return new _Directory(path);
+      return _Directory(path);
     }
     return overrides.createDirectory(path);
   }
@@ -120,13 +120,13 @@ abstract interface class Directory implements FileSystemEntity {
   @pragma("vm:entry-point")
   factory Directory.fromRawPath(Uint8List path) {
     // TODO(bkonyi): Handle overrides.
-    return new _Directory.fromRawPath(path);
+    return _Directory.fromRawPath(path);
   }
 
   /// Create a [Directory] from a URI.
   ///
   /// If [uri] cannot reference a directory this throws [UnsupportedError].
-  factory Directory.fromUri(Uri uri) => new Directory(uri.toFilePath());
+  factory Directory.fromUri(Uri uri) => Directory(uri.toFilePath());
 
   /// Creates a directory object pointing to the current working
   /// directory.

sdk/lib/io/directory_impl.dart

@@ -53,7 +53,7 @@ class _Directory extends FileSystemEntity implements Directory {
         "",
       );
     }
-    return new _Directory(result);
+    return _Directory(result);
   }
 
   static void set current(Object? path) {
@@ -72,7 +72,7 @@ class _Directory extends FileSystemEntity implements Directory {
     };
 
     if (!_EmbedderConfig._mayChdir) {
-      throw new UnsupportedError(
+      throw UnsupportedError(
         "This embedder disallows setting Directory.current",
       );
     }
@@ -88,7 +88,7 @@ class _Directory extends FileSystemEntity implements Directory {
   }
 
   Uri get uri {
-    return new Uri.directory(path);
+    return Uri.directory(path);
   }
 
   Future<bool> exists() {
@@ -104,12 +104,12 @@ class _Directory extends FileSystemEntity implements Directory {
   bool existsSync() {
     var result = _exists(_Namespace._namespace, _rawPath);
     if (result is OSError) {
-      throw new FileSystemException("Exists failed", path, result);
+      throw FileSystemException("Exists failed", path, result);
     }
     return (result == 1);
   }
 
-  Directory get absolute => new Directory(_absolutePath);
+  Directory get absolute => Directory(_absolutePath);
 
   Future<Directory> create({bool recursive = false}) {
     if (recursive) {
@@ -148,12 +148,12 @@ class _Directory extends FileSystemEntity implements Directory {
   }
 
   static Directory get systemTemp =>
-      new Directory(_systemTemp(_Namespace._namespace));
+      Directory(_systemTemp(_Namespace._namespace));
 
   Future<Directory> createTemp([String? prefix]) {
     prefix ??= '';
     if (path == '') {
-      throw new ArgumentError(
+      throw ArgumentError(
         "Directory.createTemp called with an empty path. "
         "To use the system temp directory, use Directory.systemTemp",
       );
@@ -182,7 +182,7 @@ class _Directory extends FileSystemEntity implements Directory {
   Directory createTempSync([String? prefix]) {
     prefix ??= '';
     if (path == '') {
-      throw new ArgumentError(
+      throw ArgumentError(
         "Directory.createTemp called with an empty path. "
         "To use the system temp directory, use Directory.systemTemp",
       );
@@ -200,13 +200,13 @@ class _Directory extends FileSystemEntity implements Directory {
       FileSystemEntity._toUtf8Array(fullPrefix),
     );
     if (result is OSError) {
-      throw new FileSystemException._fromOSError(
+      throw FileSystemException._fromOSError(
         result,
         "Creation of temporary directory failed",
         fullPrefix,
       );
     }
-    return new Directory(result);
+    return Directory(result);
   }
 
   Future<Directory> _delete({bool recursive = false}) {
@@ -234,7 +234,7 @@ class _Directory extends FileSystemEntity implements Directory {
       newPath,
     ]).then((response) {
       _checkForErrorResponse(response, "Rename failed", path);
-      return new Directory(newPath);
+      return Directory(newPath);
     });
   }
 
@@ -245,14 +245,14 @@ class _Directory extends FileSystemEntity implements Directory {
     if (result is OSError) {
       throw FileSystemException._fromOSError(result, "Rename failed", path);
     }
-    return new Directory(newPath);
+    return Directory(newPath);
   }
 
   Stream<FileSystemEntity> list({
     bool recursive = false,
     bool followLinks = true,
   }) {
-    return new _AsyncDirectoryLister(
+    return _AsyncDirectoryLister(
       // FIXME(bkonyi): here we're using `path` directly, which might cause issues
       // if it is not UTF-8 encoded.
       FileSystemEntity._toUtf8Array(
@@ -316,12 +316,12 @@ class _AsyncDirectoryLister {
   final bool recursive;
   final bool followLinks;
 
-  final controller = new StreamController<FileSystemEntity>(sync: true);
+  final controller = StreamController<FileSystemEntity>(sync: true);
   bool canceled = false;
   bool nextRunning = false;
   bool closed = false;
   _AsyncDirectoryListerOps? _ops;
-  Completer closeCompleter = new Completer();
+  Completer closeCompleter = Completer();
 
   _AsyncDirectoryLister(this.rawPath, this.recursive, this.followLinks) {
     controller
@@ -349,7 +349,7 @@ class _AsyncDirectoryLister {
       followLinks,
     ]).then((response) {
       if (response is int) {
-        _ops = new _AsyncDirectoryListerOps(response);
+        _ops = _AsyncDirectoryListerOps(response);
         next();
       } else if (response is Error) {
         controller.addError(response, response.stackTrace);
@@ -401,13 +401,13 @@ class _AsyncDirectoryLister {
           assert(i % 2 == 0);
           switch (result[i++]) {
             case listFile:
-              controller.add(new File.fromRawPath(result[i]));
+              controller.add(File.fromRawPath(result[i]));
               break;
             case listDirectory:
-              controller.add(new Directory.fromRawPath(result[i]));
+              controller.add(Directory.fromRawPath(result[i]));
               break;
             case listLink:
-              controller.add(new Link.fromRawPath(result[i]));
+              controller.add(Link.fromRawPath(result[i]));
               break;
             case listError:
               error(result[i]);
@@ -418,7 +418,7 @@ class _AsyncDirectoryLister {
           }
         }
       } else {
-        controller.addError(new FileSystemException("Internal error"));
+        controller.addError(FileSystemException("Internal error"));
       }
     });
   }
@@ -452,9 +452,9 @@ class _AsyncDirectoryLister {
     var errorResponseInfo = message[responseError]! as List<Object?>;
     var errorType = errorResponseInfo[_errorResponseErrorType];
     if (errorType == _illegalArgumentResponse) {
-      controller.addError(new ArgumentError());
+      controller.addError(ArgumentError());
     } else if (errorType == _osErrorResponse) {
-      var err = new OSError(
+      var err = OSError(
         errorResponseInfo[_osErrorResponseMessage] as String,
         errorResponseInfo[_osErrorResponseErrorCode] as int,
       );
@@ -472,7 +472,7 @@ class _AsyncDirectoryLister {
         ),
       );
     } else {
-      controller.addError(new FileSystemException("Internal error"));
+      controller.addError(FileSystemException("Internal error"));
     }
   }
 }

sdk/lib/io/file.dart

@@ -7,25 +7,25 @@ part of dart.io;
 /// The modes in which a [File] can be opened.
 class FileMode {
   /// The mode for opening a file only for reading.
-  static const read = const FileMode._internal(0);
+  static const read = FileMode._internal(0);
 
   /// Mode for opening a file for reading and writing. The file is
   /// overwritten if it already exists. The file is created if it does not
   /// already exist.
-  static const write = const FileMode._internal(1);
+  static const write = FileMode._internal(1);
 
   /// Mode for opening a file for reading and writing to the
   /// end of it. The file is created if it does not already exist.
-  static const append = const FileMode._internal(2);
+  static const append = FileMode._internal(2);
 
   /// Mode for opening a file for writing *only*. The file is
   /// overwritten if it already exists. The file is created if it does not
   /// already exist.
-  static const writeOnly = const FileMode._internal(3);
+  static const writeOnly = FileMode._internal(3);
 
   /// Mode for opening a file for writing *only* to the
   /// end of it. The file is created if it does not already exist.
-  static const writeOnlyAppend = const FileMode._internal(4);
+  static const writeOnlyAppend = FileMode._internal(4);
 
   final int _mode;
 
@@ -35,16 +35,16 @@ class FileMode {
 /// Type of lock when requesting a lock on a file.
 class FileLock {
   /// Shared file lock.
-  static const shared = const FileLock._internal(1);
+  static const shared = FileLock._internal(1);
 
   /// Exclusive file lock.
-  static const exclusive = const FileLock._internal(2);
+  static const exclusive = FileLock._internal(2);
 
   /// Blocking shared file lock.
-  static const blockingShared = const FileLock._internal(3);
+  static const blockingShared = FileLock._internal(3);
 
   /// Blocking exclusive file lock.
-  static const blockingExclusive = const FileLock._internal(4);
+  static const blockingExclusive = FileLock._internal(4);
 
   final int _type;
 
@@ -201,7 +201,7 @@ abstract interface class File implements FileSystemEntity {
   factory File(String path) {
     final IOOverrides? overrides = IOOverrides.current;
     if (overrides == null) {
-      return new _File(path);
+      return _File(path);
     }
     return overrides.createFile(path);
   }
@@ -209,7 +209,7 @@ abstract interface class File implements FileSystemEntity {
   /// Create a [File] object from a URI.
   ///
   /// If [uri] cannot reference a file this throws [UnsupportedError].
-  factory File.fromUri(Uri uri) => new File(uri.toFilePath());
+  factory File.fromUri(Uri uri) => File(uri.toFilePath());
 
   /// Creates a [File] object from a raw path.
   ///
@@ -217,7 +217,7 @@ abstract interface class File implements FileSystemEntity {
   @pragma("vm:entry-point")
   factory File.fromRawPath(Uint8List rawPath) {
     // TODO(bkonyi): Handle overrides.
-    return new _File.fromRawPath(rawPath);
+    return _File.fromRawPath(rawPath);
   }
 
   /// Creates the file.
@@ -1120,7 +1120,7 @@ class FileSystemException implements IOException {
   }
 
   String _toStringHelper(String className) {
-    StringBuffer sb = new StringBuffer();
+    StringBuffer sb = StringBuffer();
     sb.write(className);
     if (message.isNotEmpty) {
       sb.write(": $message");

sdk/lib/io/io_sink.dart

@@ -31,7 +31,7 @@ abstract interface class IOSink implements StreamSink<List<int>>, StringSink {
   factory IOSink(
     StreamConsumer<List<int>> target, {
     Encoding encoding = utf8,
-  }) => new _IOSinkImpl(target, encoding);
+  }) => _IOSinkImpl(target, encoding);
 
   /// The [Encoding] used when writing strings.
   ///
@@ -139,7 +139,7 @@ abstract interface class IOSink implements StreamSink<List<int>>, StringSink {
 
 class _StreamSinkImpl<T> implements StreamSink<T> {
   final StreamConsumer<T> _target;
-  final Completer _doneCompleter = new Completer();
+  final Completer _doneCompleter = Completer();
   StreamController<T>? _controllerInstance;
   Completer? _controllerCompleter;
   bool _isClosed = false;
@@ -164,7 +164,7 @@ class _StreamSinkImpl<T> implements StreamSink<T> {
 
   Future addStream(Stream<T> stream) {
     if (_isBound) {
-      throw new StateError("StreamSink is already bound to a stream");
+      throw StateError("StreamSink is already bound to a stream");
     }
     if (_hasError) return done;
 
@@ -186,9 +186,9 @@ class _StreamSinkImpl<T> implements StreamSink<T> {
 
   Future flush() {
     if (_isBound) {
-      throw new StateError("StreamSink is bound to a stream");
+      throw StateError("StreamSink is bound to a stream");
     }
-    if (_controllerInstance == null) return new Future.value(this);
+    if (_controllerInstance == null) return Future.value(this);
     // Adding an empty stream-controller will return a future that will complete
     // when all data is done.
     _isBound = true;
@@ -201,7 +201,7 @@ class _StreamSinkImpl<T> implements StreamSink<T> {
 
   Future close() {
     if (_isBound) {
-      throw new StateError("StreamSink is bound to a stream");
+      throw StateError("StreamSink is bound to a stream");
     }
     if (!_isClosed) {
       _isClosed = true;
@@ -235,14 +235,14 @@ class _StreamSinkImpl<T> implements StreamSink<T> {
 
   StreamController<T> get _controller {
     if (_isBound) {
-      throw new StateError("StreamSink is bound to a stream");
+      throw StateError("StreamSink is bound to a stream");
     }
     if (_isClosed) {
-      throw new StateError("StreamSink is closed");
+      throw StateError("StreamSink is closed");
     }
     if (_controllerInstance == null) {
-      _controllerInstance = new StreamController<T>(sync: true);
-      _controllerCompleter = new Completer();
+      _controllerInstance = StreamController<T>(sync: true);
+      _controllerCompleter = Completer();
       _target
           .addStream(_controller.stream)
           .then(
@@ -285,7 +285,7 @@ class _IOSinkImpl extends _StreamSinkImpl<List<int>> implements IOSink {
 
   void set encoding(Encoding value) {
     if (!_encodingMutable) {
-      throw new StateError("IOSink encoding is not mutable");
+      throw StateError("IOSink encoding is not mutable");
     }
     _encoding = value;
   }
@@ -317,6 +317,6 @@ class _IOSinkImpl extends _StreamSinkImpl<List<int>> implements IOSink {
   }
 
   void writeCharCode(int charCode) {
-    write(new String.fromCharCode(charCode));
+    write(String.fromCharCode(charCode));
   }
 }

sdk/lib/io/network_profiling.dart

@@ -39,7 +39,7 @@ Map<String, Object?> _createHttpProfileRequestFromProfileMap(
   };
 }
 
-@pragma('vm:entry-point', !const bool.fromEnvironment("dart.vm.product"))
+@pragma('vm:entry-point', !bool.fromEnvironment("dart.vm.product"))
 abstract class _NetworkProfiling {
   // Http relative RPCs
   static const _kHttpEnableTimelineLogging =
@@ -58,7 +58,7 @@ abstract class _NetworkProfiling {
   // if more methods added to dart:io,
   static const _kGetVersionRPC = 'ext.dart.io.getVersion';
 
-  @pragma('vm:entry-point', !const bool.fromEnvironment("dart.vm.product"))
+  @pragma('vm:entry-point', !bool.fromEnvironment("dart.vm.product"))
   static void _registerServiceExtension() {
     registerExtension(_kHttpEnableTimelineLogging, _serviceExtensionHandler);
     registerExtension(_kGetSocketProfileRPC, _serviceExtensionHandler);

sdk/lib/io/overrides.dart

@@ -4,7 +4,7 @@
 
 part of dart.io;
 
-final _ioOverridesToken = new Object();
+final _ioOverridesToken = Object();
 
 /// Facilities for overriding various APIs of `dart:io` with mock
 /// implementations.
@@ -117,7 +117,7 @@ abstract class IOOverrides {
       currentScope = current;
       current = currentScope._previous;
     }
-    IOOverrides overrides = new _IOOverridesScope(
+    IOOverrides overrides = _IOOverridesScope(
       current,
       // Directory
       createDirectory ?? currentScope?._createDirectory,
@@ -180,7 +180,7 @@ abstract class IOOverrides {
   ///
   /// When this override is installed, this function overrides the behavior of
   /// `new Directory()` and `new Directory.fromUri()`.
-  Directory createDirectory(String path) => new _Directory(path);
+  Directory createDirectory(String path) => _Directory(path);
 
   /// Returns the current working directory.
   ///
@@ -208,7 +208,7 @@ abstract class IOOverrides {
   ///
   /// When this override is installed, this function overrides the behavior of
   /// `new File()` and `new File.fromUri()`.
-  File createFile(String path) => new _File(path);
+  File createFile(String path) => _File(path);
 
   // FileStat
 
@@ -286,7 +286,7 @@ abstract class IOOverrides {
   ///
   /// When this override is installed, this function overrides the behavior of
   /// `new Link()` and `new Link.fromUri()`.
-  Link createLink(String path) => new _Link(path);
+  Link createLink(String path) => _Link(path);
 
   // Socket
 

sdk/lib/io/platform_impl.dart

@@ -84,8 +84,8 @@ class _Platform {
       if (env is Iterable<Object?>) {
         var result =
             Platform.isWindows
-                ? new _CaseInsensitiveStringMap<String>()
-                : new Map<String, String>();
+                ? _CaseInsensitiveStringMap<String>()
+                : Map<String, String>();
         for (var environmentEntry in env) {
           if (environmentEntry == null) {
             continue;
@@ -107,7 +107,7 @@ class _Platform {
             );
           }
         }
-        _environmentCache = new UnmodifiableMapView<String, String>(result);
+        _environmentCache = UnmodifiableMapView<String, String>(result);
       } else {
         _environmentCache = env;
       }
@@ -126,7 +126,7 @@ class _Platform {
 // Environment variables are case-insensitive on Windows. In order
 // to reflect that we use a case-insensitive string map on Windows.
 class _CaseInsensitiveStringMap<V> extends MapBase<String, V> {
-  final Map<String, V> _map = new Map<String, V>();
+  final Map<String, V> _map = Map<String, V>();
 
   bool containsKey(Object? key) =>
       key is String && _map.containsKey(key.toUpperCase());

sdk/lib/io/secure_socket.dart

@@ -68,7 +68,7 @@ abstract interface class SecureSocket implements Socket {
       keyLog: keyLog,
       supportedProtocols: supportedProtocols,
       timeout: timeout,
-    ).then((rawSocket) => new SecureSocket._(rawSocket));
+    ).then((rawSocket) => SecureSocket._(rawSocket));
   }
 
   /// Like [connect], but returns a [Future] that completes with a
@@ -91,9 +91,9 @@ abstract interface class SecureSocket implements Socket {
       supportedProtocols: supportedProtocols,
     ).then((rawState) {
       Future<SecureSocket> socket = rawState.socket.then(
-        (rawSocket) => new SecureSocket._(rawSocket),
+        (rawSocket) => SecureSocket._(rawSocket),
       );
-      return new ConnectionTask<SecureSocket>._(socket, rawState._onCancel);
+      return ConnectionTask<SecureSocket>._(socket, rawState._onCancel);
     });
   }
 
@@ -170,7 +170,7 @@ abstract interface class SecureSocket implements Socket {
             supportedProtocols: supportedProtocols,
           );
         })
-        .then<SecureSocket>((raw) => new SecureSocket._(raw));
+        .then<SecureSocket>((raw) => SecureSocket._(raw));
   }
 
   /// Initiates TLS on an existing server connection.
@@ -214,7 +214,7 @@ abstract interface class SecureSocket implements Socket {
             supportedProtocols: supportedProtocols,
           );
         })
-        .then<SecureSocket>((raw) => new SecureSocket._(raw));
+        .then<SecureSocket>((raw) => SecureSocket._(raw));
   }
 
   /// The peer certificate for a connected SecureSocket.
@@ -343,7 +343,7 @@ abstract interface class RawSecureSocket implements RawSocket {
           supportedProtocols: supportedProtocols,
         );
       });
-      return new ConnectionTask<RawSecureSocket>._(socket, rawState._onCancel);
+      return ConnectionTask<RawSecureSocket>._(socket, rawState._onCancel);
     });
   }
 
@@ -559,8 +559,8 @@ class _RawSecureSocket extends Stream<RawSocketEvent>
 
   final RawSocket _socket;
   final Completer<_RawSecureSocket> _handshakeComplete =
-      new Completer<_RawSecureSocket>();
-  final _controller = new StreamController<RawSocketEvent>(sync: true);
+      Completer<_RawSecureSocket>();
+  final _controller = StreamController<RawSocketEvent>(sync: true);
   late final StreamSubscription<RawSocketEvent> _socketSubscription;
   List<int>? _bufferedData;
   int _bufferedDataIndex = 0;
@@ -583,13 +583,13 @@ class _RawSecureSocket extends Stream<RawSocketEvent>
   bool _closedRead = false; // The secure socket has fired an onClosed event.
   bool _closedWrite = false; // The secure socket has been closed for writing.
   // The network socket is gone.
-  Completer<RawSecureSocket> _closeCompleter = new Completer<RawSecureSocket>();
-  _FilterStatus _filterStatus = new _FilterStatus();
+  Completer<RawSecureSocket> _closeCompleter = Completer<RawSecureSocket>();
+  _FilterStatus _filterStatus = _FilterStatus();
   bool _connectPending = true;
   bool _filterPending = false;
   bool _filterActive = false;
 
-  _SecureFilter? _secureFilter = new _SecureFilter._();
+  _SecureFilter? _secureFilter = _SecureFilter._();
   String? _selectedProtocol;
 
   static Future<_RawSecureSocket> connect(
@@ -617,7 +617,7 @@ class _RawSecureSocket extends Stream<RawSocketEvent>
     if (host != null) {
       address = InternetAddress._cloneWithNewHost(address, host);
     }
-    return new _RawSecureSocket(
+    return _RawSecureSocket(
       address,
       requestedPort,
       isServer,
@@ -693,7 +693,7 @@ class _RawSecureSocket extends Stream<RawSocketEvent>
       _socketSubscription = subscription;
       if (_socketSubscription.isPaused) {
         _socket.close();
-        throw new ArgumentError("Subscription passed to TLS upgrade is paused");
+        throw ArgumentError("Subscription passed to TLS upgrade is paused");
       }
       // If we are upgrading a socket that is already closed for read,
       // report an error as if we received readClosed during the handshake.
@@ -745,7 +745,7 @@ class _RawSecureSocket extends Stream<RawSocketEvent>
     bool requireClientCertificate,
   ) {
     if (host is! String && host is! InternetAddress) {
-      throw new ArgumentError("host is not a String or an InternetAddress");
+      throw ArgumentError("host is not a String or an InternetAddress");
     }
     // TODO(40614): Remove once non-nullability is sound.
     ArgumentError.checkNotNull(requestedPort, "requestedPort");
@@ -850,12 +850,12 @@ class _RawSecureSocket extends Stream<RawSocketEvent>
 
   Uint8List? read([int? length]) {
     if (length != null && length < 0) {
-      throw new ArgumentError(
+      throw ArgumentError(
         "Invalid length parameter in SecureSocket.read (length: $length)",
       );
     }
     if (_closedRead) {
-      throw new SocketException("Reading from a closed socket");
+      throw SocketException("Reading from a closed socket");
     }
     if (_status != connectedStatus) {
       return null;
@@ -874,19 +874,19 @@ class _RawSecureSocket extends Stream<RawSocketEvent>
   // Write the data to the socket, and schedule the filter to encrypt it.
   int write(List<int> data, [int offset = 0, int? bytes]) {
     if (bytes != null && bytes < 0) {
-      throw new ArgumentError(
+      throw ArgumentError(
         "Invalid bytes parameter in SecureSocket.read (bytes: $bytes)",
       );
     }
     // TODO(40614): Remove once non-nullability is sound.
     offset = _fixOffset(offset);
     if (offset < 0) {
-      throw new ArgumentError(
+      throw ArgumentError(
         "Invalid offset parameter in SecureSocket.read (offset: $offset)",
       );
     }
     if (_closedWrite) {
-      _controller.addError(new SocketException("Writing to a closed socket"));
+      _controller.addError(SocketException("Writing to a closed socket"));
       return 0;
     }
     if (_status != connectedStatus) return 0;
@@ -997,7 +997,7 @@ class _RawSecureSocket extends Stream<RawSocketEvent>
       // bytes available we can continue handshake.
       if (_filterStatus.readEmpty) {
         _reportError(
-          new HandshakeException('Connection terminated during handshake'),
+          HandshakeException('Connection terminated during handshake'),
           null,
         );
       }
@@ -1028,9 +1028,7 @@ class _RawSecureSocket extends Stream<RawSocketEvent>
     bool requireClientCertificate = false,
   }) {
     if (_status != connectedStatus) {
-      throw new HandshakeException(
-        "Called renegotiate on a non-connected socket",
-      );
+      throw HandshakeException("Called renegotiate on a non-connected socket");
     }
     _status = handshakeStatus;
     _filterStatus.writeEmpty = false;
@@ -1113,7 +1111,7 @@ class _RawSecureSocket extends Stream<RawSocketEvent>
           if (_status == handshakeStatus) {
             _secureFilter!.handshake();
             if (_status == handshakeStatus) {
-              throw new HandshakeException(
+              throw HandshakeException(
                 'Connection terminated during handshake',
               );
             }
@@ -1226,7 +1224,7 @@ class _RawSecureSocket extends Stream<RawSocketEvent>
 
   Future<_FilterStatus> _pushAllFilterStages() async {
     bool wasInHandshake = _status != connectedStatus;
-    List args = new List<dynamic>.filled(2 + bufferCount * 2, null);
+    List args = List<dynamic>.filled(2 + bufferCount * 2, null);
     args[0] = _secureFilter!._pointer();
     args[1] = wasInHandshake;
     var bufs = _secureFilter!.buffers!;
@@ -1242,21 +1240,18 @@ class _RawSecureSocket extends Stream<RawSocketEvent>
       if (wasInHandshake) {
         // If we're in handshake, throw a handshake error.
         _reportError(
-          new HandshakeException('${response[1]} error ${response[0]}'),
+          HandshakeException('${response[1]} error ${response[0]}'),
           null,
         );
       } else {
         // If we're connected, throw a TLS error.
-        _reportError(
-          new TlsException('${response[1]} error ${response[0]}'),
-          null,
-        );
+        _reportError(TlsException('${response[1]} error ${response[0]}'), null);
       }
     }
     int start(int index) => response[2 * index] as int;
     int end(int index) => response[2 * index + 1] as int;
 
-    _FilterStatus status = new _FilterStatus();
+    _FilterStatus status = _FilterStatus();
     // Compute writeEmpty as "write plaintext buffer and write encrypted
     // buffer were empty when we started and are empty now".
     status.writeEmpty =
@@ -1371,7 +1366,7 @@ class _ExternalBuffer {
       bytes = min(bytes, length);
     }
     if (bytes == 0) return null;
-    Uint8List result = new Uint8List(bytes);
+    Uint8List result = Uint8List(bytes);
     int bytesRead = 0;
     // Loop over zero, one, or two linear data ranges.
     while (bytesRead < bytes) {
@@ -1477,7 +1472,7 @@ class TlsException implements IOException {
   const TlsException._(this.type, this.message, this.osError);
 
   String toString() {
-    StringBuffer sb = new StringBuffer();
+    StringBuffer sb = StringBuffer();
     sb.write(type);
     if (message.isNotEmpty) {
       sb.write(": $message");

sdk/lib/io/security_context.dart

@@ -231,7 +231,7 @@ abstract final class SecurityContext {
   /// We will be conservative and support only messages up to (1<<13)-1 bytes.
   static Uint8List _protocolsToLengthEncoding(List<String>? protocols) {
     if (protocols == null || protocols.length == 0) {
-      return new Uint8List(0);
+      return Uint8List(0);
     }
     int protocolsLength = protocols.length;
 
@@ -242,20 +242,18 @@ abstract final class SecurityContext {
       if (length > 0 && length <= 255) {
         expectedLength += length;
       } else {
-        throw new ArgumentError(
+        throw ArgumentError(
           'Length of protocol must be between 1 and 255 (was: $length).',
         );
       }
     }
 
     if (expectedLength >= (1 << 13)) {
-      throw new ArgumentError(
-        'The maximum message length supported is 2^13-1.',
-      );
+      throw ArgumentError('The maximum message length supported is 2^13-1.');
     }
 
     // Try encoding the `List<String> protocols` array using fast ASCII path.
-    var bytes = new Uint8List(expectedLength);
+    var bytes = Uint8List(expectedLength);
     int bytesOffset = 0;
     for (int i = 0; i < protocolsLength; i++) {
       String proto = protocols[i];
@@ -287,7 +285,7 @@ abstract final class SecurityContext {
       var len = protocolBytes.length;
 
       if (len > 255) {
-        throw new ArgumentError(
+        throw ArgumentError(
           'Length of protocol must be between 1 and 255 (was: $len)',
         );
       }
@@ -304,11 +302,9 @@ abstract final class SecurityContext {
     }
 
     if (bytes.length >= (1 << 13)) {
-      throw new ArgumentError(
-        'The maximum message length supported is 2^13-1.',
-      );
+      throw ArgumentError('The maximum message length supported is 2^13-1.');
     }
 
-    return new Uint8List.fromList(bytes);
+    return Uint8List.fromList(bytes);
   }
 }

sdk/lib/io/socket.dart

@@ -10,10 +10,10 @@ part of dart.io;
 /// and Unix domain address are supported.
 /// Unix domain sockets are available only on Linux, MacOS and Android.
 final class InternetAddressType {
-  static const InternetAddressType IPv4 = const InternetAddressType._(0);
-  static const InternetAddressType IPv6 = const InternetAddressType._(1);
-  static const InternetAddressType unix = const InternetAddressType._(2);
-  static const InternetAddressType any = const InternetAddressType._(-1);
+  static const InternetAddressType IPv4 = InternetAddressType._(0);
+  static const InternetAddressType IPv6 = InternetAddressType._(1);
+  static const InternetAddressType unix = InternetAddressType._(2);
+  static const InternetAddressType any = InternetAddressType._(-1);
 
   final int _value;
 
@@ -23,7 +23,7 @@ final class InternetAddressType {
     if (value == IPv4._value) return IPv4;
     if (value == IPv6._value) return IPv6;
     if (value == unix._value) return unix;
-    throw new ArgumentError("Invalid type: $value");
+    throw ArgumentError("Invalid type: $value");
   }
 
   /// Get the name of the type, e.g. "IPv4" or "IPv6".
@@ -362,9 +362,9 @@ abstract interface class ServerSocket implements ServerSocketBase<Socket> {
 /// The [SocketDirection] is used as a parameter to [Socket.close] and
 /// [RawSocket.close] to close a socket in the specified direction(s).
 final class SocketDirection {
-  static const SocketDirection receive = const SocketDirection._(0);
-  static const SocketDirection send = const SocketDirection._(1);
-  static const SocketDirection both = const SocketDirection._(2);
+  static const SocketDirection receive = SocketDirection._(0);
+  static const SocketDirection send = SocketDirection._(1);
+  static const SocketDirection both = SocketDirection._(2);
 
   final _value;
 
@@ -382,12 +382,12 @@ final class SocketOption {
   /// as an individual TCP packet.
   ///
   /// tcpNoDelay is disabled by default.
-  static const SocketOption tcpNoDelay = const SocketOption._(0);
+  static const SocketOption tcpNoDelay = SocketOption._(0);
 
-  static const SocketOption _ipMulticastLoop = const SocketOption._(1);
-  static const SocketOption _ipMulticastHops = const SocketOption._(2);
-  static const SocketOption _ipMulticastIf = const SocketOption._(3);
-  static const SocketOption _ipBroadcast = const SocketOption._(4);
+  static const SocketOption _ipMulticastLoop = SocketOption._(1);
+  static const SocketOption _ipMulticastHops = SocketOption._(2);
+  static const SocketOption _ipMulticastIf = SocketOption._(3);
+  static const SocketOption _ipBroadcast = SocketOption._(4);
 
   final _value;
 
@@ -531,16 +531,16 @@ final class RawSocketOption {
 /// ```
 class RawSocketEvent {
   /// An event indicates the socket is ready to be read.
-  static const RawSocketEvent read = const RawSocketEvent._(0);
+  static const RawSocketEvent read = RawSocketEvent._(0);
 
   /// An event indicates the socket is ready to write.
-  static const RawSocketEvent write = const RawSocketEvent._(1);
+  static const RawSocketEvent write = RawSocketEvent._(1);
 
   /// An event indicates the reading from the socket is closed
-  static const RawSocketEvent readClosed = const RawSocketEvent._(2);
+  static const RawSocketEvent readClosed = RawSocketEvent._(2);
 
   /// An event indicates the socket is closed.
-  static const RawSocketEvent closed = const RawSocketEvent._(3);
+  static const RawSocketEvent closed = RawSocketEvent._(3);
 
   final int _value;
 
@@ -1408,7 +1408,7 @@ class SocketException implements IOException {
       port = null;
 
   String toString() {
-    StringBuffer sb = new StringBuffer();
+    StringBuffer sb = StringBuffer();
     sb.write("SocketException");
     if (message.isNotEmpty) {
       sb.write(": $message");

sdk/lib/typed_data/typed_data.dart

@@ -402,10 +402,10 @@ final class Endian {
   final bool _littleEndian;
   const Endian._(this._littleEndian);
 
-  static const Endian big = const Endian._(false);
-  static const Endian little = const Endian._(true);
+  static const Endian big = Endian._(false);
+  static const Endian little = Endian._(true);
   static final Endian host =
-      (new ByteData.view(new Uint16List.fromList([1]).buffer)).getInt8(0) == 1
+      (ByteData.view(Uint16List.fromList([1]).buffer)).getInt8(0) == 1
           ? little
           : big;
 }

sdk/lib/vmservice/vmservice.dart

@@ -876,14 +876,14 @@ class VMService extends MessageRouter {
 
 @pragma(
   'vm:entry-point',
-  const bool.fromEnvironment('dart.vm.product') ? false : 'call',
+  bool.fromEnvironment('dart.vm.product') ? false : 'call',
 )
 RawReceivePort boot() {
   // Return the port we expect isolate control messages on.
   return isolateControlPort;
 }
 
-@pragma('vm:entry-point', !const bool.fromEnvironment('dart.vm.product'))
+@pragma('vm:entry-point', !bool.fromEnvironment('dart.vm.product'))
 // ignore: unused_element
 void _registerIsolate(int port_id, SendPort sp, String name) =>
     VMService().runningIsolates.isolateStartup(port_id, sp, name);