enable lint prefer_equal_for_default_values (#18156)

analysis_options.yaml

@@ -118,7 +118,7 @@ linter:
     - prefer_const_literals_to_create_immutables
     # - prefer_constructors_over_static_methods # not yet tested
     - prefer_contains
-    # - prefer_equal_for_default_values # not yet tested
+    - prefer_equal_for_default_values
     # - prefer_expression_function_bodies # conflicts with https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo#consider-using--for-short-functions-and-methods
     - prefer_final_fields
     - prefer_final_locals

analysis_options_repo.yaml

@@ -115,7 +115,7 @@ linter:
     - prefer_const_literals_to_create_immutables
     # - prefer_constructors_over_static_methods # not yet tested
     - prefer_contains
-    # - prefer_equal_for_default_values # not yet tested
+    - prefer_equal_for_default_values
     # - prefer_expression_function_bodies # conflicts with https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo#consider-using--for-short-functions-and-methods
     - prefer_final_fields
     - prefer_final_locals

dev/bots/prepare_package.dart

@@ -78,9 +78,9 @@ Branch fromBranchName(String name) {
 class ProcessRunner {
   ProcessRunner({
     ProcessManager processManager,
-    this.subprocessOutput: true,
+    this.subprocessOutput = true,
     this.defaultWorkingDirectory,
-    this.platform: const LocalPlatform(),
+    this.platform = const LocalPlatform(),
   }) : processManager = processManager ?? const LocalProcessManager() {
     environment = new Map<String, String>.from(platform.environment);
   }
@@ -112,7 +112,7 @@ class ProcessRunner {
   Future<String> runProcess(
     List<String> commandLine, {
     Directory workingDirectory,
-    bool failOk: false,
+    bool failOk = false,
   }) async {
     workingDirectory ??= defaultWorkingDirectory ?? Directory.current;
     if (subprocessOutput) {
@@ -193,8 +193,8 @@ class ArchiveCreator {
     this.revision,
     this.branch, {
     ProcessManager processManager,
-    bool subprocessOutput: true,
+    bool subprocessOutput = true,
-    this.platform: const LocalPlatform(),
+    this.platform = const LocalPlatform(),
     HttpReader httpReader,
   }) : assert(revision.length == 40),
        flutterRoot = new Directory(path.join(tempDir.path, 'flutter')),
@@ -430,8 +430,8 @@ class ArchivePublisher {
     this.version,
     this.outputFile, {
     ProcessManager processManager,
-    bool subprocessOutput: true,
+    bool subprocessOutput = true,
-    this.platform: const LocalPlatform(),
+    this.platform = const LocalPlatform(),
   }) : assert(revision.length == 40),
        platformName = platform.operatingSystem.toLowerCase(),
        metadataGsPath = '$gsReleaseFolder/${getMetadataFilename(platform)}',
@@ -528,7 +528,7 @@ class ArchivePublisher {
   Future<String> _runGsUtil(
     List<String> args, {
     Directory workingDirectory,
-    bool failOk: false,
+    bool failOk = false,
   }) async {
     return _processRunner.runProcess(
       <String>['gsutil']..addAll(args),

dev/bots/test.dart

@@ -274,7 +274,7 @@ class EvalResult {
 Future<EvalResult> _evalCommand(String executable, List<String> arguments, {
   String workingDirectory,
   Map<String, String> environment,
-  bool skip: false,
+  bool skip = false,
 }) async {
   final String commandDescription = '${path.relative(executable, from: workingDirectory)} ${arguments.join(' ')}';
   final String relativeWorkingDir = path.relative(workingDirectory);
@@ -315,10 +315,10 @@ Future<EvalResult> _evalCommand(String executable, List<String> arguments, {
 Future<Null> _runCommand(String executable, List<String> arguments, {
   String workingDirectory,
   Map<String, String> environment,
-  bool expectFailure: false,
+  bool expectFailure = false,
-  bool printOutput: true,
+  bool printOutput = true,
-  bool skip: false,
+  bool skip = false,
-  Duration timeout: _kLongTimeout,
+  Duration timeout = _kLongTimeout,
 }) async {
   final String commandDescription = '${path.relative(executable, from: workingDirectory)} ${arguments.join(' ')}';
   final String relativeWorkingDir = path.relative(workingDirectory);
@@ -364,11 +364,11 @@ Future<Null> _runCommand(String executable, List<String> arguments, {
 
 Future<Null> _runFlutterTest(String workingDirectory, {
   String script,
-  bool expectFailure: false,
+  bool expectFailure = false,
-  bool printOutput: true,
+  bool printOutput = true,
-  List<String> options: const <String>[],
+  List<String> options = const <String>[],
-  bool skip: false,
+  bool skip = false,
-  Duration timeout: _kLongTimeout,
+  Duration timeout = _kLongTimeout,
 }) {
   final List<String> args = <String>['test']..addAll(options);
   if (flutterTestArgs != null && flutterTestArgs.isNotEmpty)
@@ -385,7 +385,7 @@ Future<Null> _runFlutterTest(String workingDirectory, {
 }
 
 Future<Null> _runFlutterAnalyze(String workingDirectory, {
-  List<String> options: const <String>[]
+  List<String> options = const <String>[]
 }) {
   return _runCommand(flutter, <String>['analyze']..addAll(options),
     workingDirectory: workingDirectory,
@@ -464,7 +464,7 @@ bool _matches<T>(List<T> a, List<T> b) {
 final RegExp _importPattern = new RegExp(r"import 'package:flutter/([^.]+)\.dart'");
 final RegExp _importMetaPattern = new RegExp(r"import 'package:meta/meta.dart'");
 
-Set<String> _findDependencies(String srcPath, List<String> errors, { bool checkForMeta: false }) {
+Set<String> _findDependencies(String srcPath, List<String> errors, { bool checkForMeta = false }) {
   return new Directory(srcPath).listSync(recursive: true).where((FileSystemEntity entity) {
     return entity is File && path.extension(entity.path) == '.dart';
   }).map<Set<String>>((FileSystemEntity entity) {

dev/devicelab/lib/framework/framework.dart

@@ -144,7 +144,7 @@ class _TaskRunner {
 /// A result of running a single task.
 class TaskResult {
   /// Constructs a successful result.
-  TaskResult.success(this.data, {this.benchmarkScoreKeys: const <String>[]})
+  TaskResult.success(this.data, {this.benchmarkScoreKeys = const <String>[]})
       : this.succeeded = true,
         this.message = 'success' {
     const JsonEncoder prettyJson = const JsonEncoder.withIndent('  ');

dev/devicelab/lib/framework/runner.dart

@@ -22,7 +22,7 @@ const Duration taskTimeoutWithGracePeriod = const Duration(minutes: 26);
 ///
 /// Running the task in [silent] mode will suppress standard output from task
 /// processes and only print standard errors.
-Future<Map<String, dynamic>> runTask(String taskName, { bool silent: false }) async {
+Future<Map<String, dynamic>> runTask(String taskName, { bool silent = false }) async {
   final String taskExecutable = 'bin/tasks/$taskName.dart';
 
   if (!file(taskExecutable).existsSync())

dev/devicelab/lib/framework/utils.dart

@@ -231,7 +231,7 @@ Future<int> exec(
   String executable,
   List<String> arguments, {
   Map<String, String> environment,
-  bool canFail: false,
+  bool canFail = false,
 }) async {
   final Process process = await startProcess(executable, arguments, environment: environment);
 
@@ -266,7 +266,7 @@ Future<String> eval(
   String executable,
   List<String> arguments, {
   Map<String, String> environment,
-  bool canFail: false,
+  bool canFail = false,
 }) async {
   final Process process = await startProcess(executable, arguments, environment: environment);
 
@@ -297,8 +297,8 @@ Future<String> eval(
 }
 
 Future<int> flutter(String command, {
-  List<String> options: const <String>[],
+  List<String> options = const <String>[],
-  bool canFail: false,
+  bool canFail = false,
   Map<String, String> environment,
 }) {
   final List<String> args = <String>[command]..addAll(options);
@@ -308,8 +308,8 @@ Future<int> flutter(String command, {
 
 /// Runs a `flutter` command and returns the standard output as a string.
 Future<String> evalFlutter(String command, {
-  List<String> options: const <String>[],
+  List<String> options = const <String>[],
-  bool canFail: false,
+  bool canFail = false,
   Map<String, String> environment,
 }) {
   final List<String> args = <String>[command]..addAll(options);

dev/devicelab/lib/tasks/gallery.dart

@@ -12,13 +12,13 @@ import '../framework/framework.dart';
 import '../framework/ios.dart';
 import '../framework/utils.dart';
 
-TaskFunction createGalleryTransitionTest({ bool semanticsEnabled: false }) {
+TaskFunction createGalleryTransitionTest({ bool semanticsEnabled = false }) {
   return new GalleryTransitionTest(semanticsEnabled: semanticsEnabled);
 }
 
 class GalleryTransitionTest {
 
-  GalleryTransitionTest({ this.semanticsEnabled: false });
+  GalleryTransitionTest({ this.semanticsEnabled = false });
 
   final bool semanticsEnabled;
 

dev/devicelab/lib/tasks/hot_mode_tests.dart

@@ -16,7 +16,7 @@ import '../framework/utils.dart';
 final Directory _editedFlutterGalleryDir = dir(path.join(Directory.systemTemp.path, 'edited_flutter_gallery'));
 final Directory flutterGalleryDir = dir(path.join(flutterDirectory.path, 'examples/flutter_gallery'));
 
-TaskFunction createHotModeTest({ bool isPreviewDart2: true }) {
+TaskFunction createHotModeTest({ bool isPreviewDart2 = true }) {
   return () async {
     final Device device = await devices.workingDevice;
     await device.unlock();

dev/devicelab/lib/tasks/microbenchmarks.dart

@@ -23,7 +23,7 @@ TaskFunction createMicrobenchmarkTask() {
     final Device device = await devices.workingDevice;
     await device.unlock();
 
-    Future<Map<String, double>> _runMicrobench(String benchmarkPath, {bool previewDart2: true}) async {
+    Future<Map<String, double>> _runMicrobench(String benchmarkPath, {bool previewDart2 = true}) async {
       Future<Map<String, double>> _run() async {
         print('Running $benchmarkPath');
         final Directory appDir = dir(
@@ -86,9 +86,9 @@ TaskFunction createMicrobenchmarkTask() {
 }
 
 Future<Process> _startFlutter({
-  String command: 'run',
+  String command = 'run',
-  List<String> options: const <String>[],
+  List<String> options = const <String>[],
-  bool canFail: false,
+  bool canFail = false,
   Map<String, String> environment,
 }) {
   final List<String> args = <String>['run']..addAll(options);

dev/devicelab/lib/tasks/perf_tests.dart

@@ -108,7 +108,7 @@ TaskFunction createBasicMaterialCompileTest() {
 class StartupTest {
   static const Duration _startupTimeout = const Duration(minutes: 5);
 
-  const StartupTest(this.testDirectory, { this.reportMetrics: true });
+  const StartupTest(this.testDirectory, { this.reportMetrics = true });
 
   final String testDirectory;
   final bool reportMetrics;
@@ -221,7 +221,7 @@ class CompileTest {
     );
   }
 
-  static Future<Map<String, dynamic>> _compileAot({ bool previewDart2: true }) async {
+  static Future<Map<String, dynamic>> _compileAot({ bool previewDart2 = true }) async {
     // Generate blobs instead of assembly.
     await flutter('clean');
     final Stopwatch watch = new Stopwatch()..start();
@@ -258,7 +258,7 @@ class CompileTest {
     return metrics;
   }
 
-  static Future<Map<String, dynamic>> _compileApp({ bool previewDart2: true }) async {
+  static Future<Map<String, dynamic>> _compileApp({ bool previewDart2 = true }) async {
     await flutter('clean');
     final Stopwatch watch = new Stopwatch();
     int releaseSizeInBytes;
@@ -299,7 +299,7 @@ class CompileTest {
     };
   }
 
-  static Future<Map<String, dynamic>> _compileDebug({ bool previewDart2: true }) async {
+  static Future<Map<String, dynamic>> _compileDebug({ bool previewDart2 = true }) async {
     await flutter('clean');
     final Stopwatch watch = new Stopwatch();
     final List<String> options = <String>['--debug'];

dev/manual_tests/lib/card_collection.dart

@@ -181,7 +181,7 @@ class CardCollectionState extends State<CardCollection> {
     });
   }
 
-  Widget buildDrawerCheckbox(String label, bool value, void callback(), { bool enabled: true }) {
+  Widget buildDrawerCheckbox(String label, bool value, void callback(), { bool enabled = true }) {
     return new ListTile(
       onTap: enabled ? callback : null,
       title: new Text(label),
@@ -192,7 +192,7 @@ class CardCollectionState extends State<CardCollection> {
     );
   }
 
-  Widget buildDrawerColorRadioItem(String label, MaterialColor itemValue, MaterialColor currentValue, ValueChanged<MaterialColor> onChanged, { IconData icon, bool enabled: true }) {
+  Widget buildDrawerColorRadioItem(String label, MaterialColor itemValue, MaterialColor currentValue, ValueChanged<MaterialColor> onChanged, { IconData icon, bool enabled = true }) {
     return new ListTile(
       leading: new Icon(icon),
       title: new Text(label),
@@ -205,7 +205,7 @@ class CardCollectionState extends State<CardCollection> {
     );
   }
 
-  Widget buildDrawerDirectionRadioItem(String label, DismissDirection itemValue, DismissDirection currentValue, ValueChanged<DismissDirection> onChanged, { IconData icon, bool enabled: true }) {
+  Widget buildDrawerDirectionRadioItem(String label, DismissDirection itemValue, DismissDirection currentValue, ValueChanged<DismissDirection> onChanged, { IconData icon, bool enabled = true }) {
     return new ListTile(
       leading: new Icon(icon),
       title: new Text(label),
@@ -218,7 +218,7 @@ class CardCollectionState extends State<CardCollection> {
     );
   }
 
-  Widget buildFontRadioItem(String label, TextAlign itemValue, TextAlign currentValue, ValueChanged<TextAlign> onChanged, { IconData icon, bool enabled: true }) {
+  Widget buildFontRadioItem(String label, TextAlign itemValue, TextAlign currentValue, ValueChanged<TextAlign> onChanged, { IconData icon, bool enabled = true }) {
     return new ListTile(
       leading: new Icon(icon),
       title: new Text(label),

dev/manual_tests/lib/drag_and_drop.dart

@@ -42,7 +42,7 @@ class ExampleDragTargetState extends State<ExampleDragTarget> {
 }
 
 class Dot extends StatefulWidget {
-  const Dot({ Key key, this.color, this.size, this.child, this.tappable: false }) : super(key: key);
+  const Dot({ Key key, this.color, this.size, this.child, this.tappable = false }) : super(key: key);
 
   final Color color;
   final double size;
@@ -77,8 +77,8 @@ class ExampleDragSource extends StatelessWidget {
   const ExampleDragSource({
     Key key,
     this.color,
-    this.heavy: false,
+    this.heavy = false,
-    this.under: true,
+    this.under = true,
     this.child
   }) : super(key: key);
 

dev/manual_tests/lib/overlay_geometry.dart

@@ -59,9 +59,9 @@ class _MarkerPainter extends CustomPainter {
 class Marker extends StatelessWidget {
   const Marker({
     Key key,
-    this.type: MarkerType.touch,
+    this.type = MarkerType.touch,
     this.position,
-    this.size: 40.0,
+    this.size = 40.0,
   }) : super(key: key);
 
   final Offset position;

dev/manual_tests/lib/text.dart

@@ -1060,7 +1060,7 @@ class _PaintingState extends State<Painting> with SingleTickerProviderStateMixin
   }
 }
 
-String zalgo(math.Random random, int targetLength, { bool includeSpacingCombiningMarks: false, String base }) {
+String zalgo(math.Random random, int targetLength, { bool includeSpacingCombiningMarks = false, String base }) {
   // The following three tables are derived from UnicodeData.txt:
   //   http://unicode.org/Public/UNIDATA/UnicodeData.txt
   // There are three groups, character classes Mc, Me, and Mn.

dev/tools/dartdoc.dart

@@ -313,7 +313,7 @@ List<Directory> findPackages() {
 /// Returns import or on-disk paths for all libraries in the Flutter SDK.
 ///
 /// diskPath toggles between import paths vs. disk paths.
-Iterable<String> libraryRefs({ bool diskPath: false }) sync* {
+Iterable<String> libraryRefs({ bool diskPath = false }) sync* {
   for (Directory dir in findPackages()) {
     final String dirName = path.basename(dir.path);
     for (FileSystemEntity file in new Directory('${dir.path}/lib').listSync()) {
@@ -336,7 +336,7 @@ Iterable<String> libraryRefs({ bool diskPath: false }) sync* {
   }
 }
 
-void printStream(Stream<List<int>> stream, { String prefix: '', List<Pattern> filter: const <Pattern>[] }) {
+void printStream(Stream<List<int>> stream, { String prefix = '', List<Pattern> filter = const <Pattern>[] }) {
   assert(prefix != null);
   assert(filter != null);
   stream

examples/catalog/lib/animated_list.dart

@@ -157,7 +157,7 @@ class CardItem extends StatelessWidget {
     @required this.animation,
     this.onTap,
     @required this.item,
-    this.selected: false
+    this.selected = false
   }) : assert(animation != null),
        assert(item != null && item >= 0),
        assert(selected != null),

examples/catalog/lib/custom_a11y_traversal.dart

@@ -213,7 +213,7 @@ class CustomTraversalExampleState extends State<CustomTraversalExample> {
     );
   }
 
-  Widget _makeSpinnerButton(int rowOrder, int columnOrder, Field field, {bool increment: true}) {
+  Widget _makeSpinnerButton(int rowOrder, int columnOrder, Field field, {bool increment = true}) {
     return new SpinnerButton(
       rowOrder: rowOrder,
       columnOrder: columnOrder,

examples/catalog/test/custom_semantics_test.dart

@@ -92,12 +92,12 @@ void main() {
 }
 
 void expectAdjustable(SemanticsNode node, {
-  bool hasIncreaseAction: true,
+  bool hasIncreaseAction = true,
-  bool hasDecreaseAction: true,
+  bool hasDecreaseAction = true,
-  String label: '',
+  String label = '',
-  String decreasedValue: '',
+  String decreasedValue = '',
-  String value: '',
+  String value = '',
-  String increasedValue: '',
+  String increasedValue = '',
 }) {
   final SemanticsData semanticsData = node.getSemanticsData();
 

examples/flutter_gallery/lib/demo/animation/home.dart

@@ -77,7 +77,7 @@ class _StatusBarPaddingSliver extends SingleChildRenderObjectWidget {
   const _StatusBarPaddingSliver({
     Key key,
     @required this.maxHeight,
-    this.scrollFactor: 5.0,
+    this.scrollFactor = 5.0,
   }) : assert(maxHeight != null && maxHeight >= 0.0),
        assert(scrollFactor != null && scrollFactor >= 1.0),
        super(key: key);
@@ -265,7 +265,7 @@ class _AllSectionsView extends AnimatedWidget {
     this.minHeight,
     this.midHeight,
     this.maxHeight,
-    this.sectionCards: const <Widget>[],
+    this.sectionCards = const <Widget>[],
   }) : assert(sections != null),
        assert(sectionCards != null),
        assert(sectionCards.length == sections.length),

examples/flutter_gallery/lib/demo/animation/widgets.dart

@@ -99,7 +99,7 @@ class SectionTitle extends StatelessWidget {
 
 // Small horizontal bar that indicates the selected section.
 class SectionIndicator extends StatelessWidget {
-  const SectionIndicator({ Key key, this.opacity: 1.0 }) : super(key: key);
+  const SectionIndicator({ Key key, this.opacity = 1.0 }) : super(key: key);
 
   final double opacity;
 

examples/flutter_gallery/lib/demo/colors_demo.dart

@@ -7,7 +7,7 @@ import 'package:flutter/material.dart';
 const double kColorItemHeight = 48.0;
 
 class Palette {
-  Palette({ this.name, this.primary, this.accent, this.threshold: 900});
+  Palette({ this.name, this.primary, this.accent, this.threshold = 900});
 
   final String name;
   final MaterialColor primary;
@@ -45,7 +45,7 @@ class ColorItem extends StatelessWidget {
     Key key,
     @required this.index,
     @required this.color,
-    this.prefix: '',
+    this.prefix = '',
   }) : assert(index != null),
        assert(color != null),
        assert(prefix != null),

examples/flutter_gallery/lib/demo/material/bottom_app_bar_demo.dart

@@ -402,7 +402,7 @@ class _DemoDrawer extends StatelessWidget {
 class _DiamondFab extends StatefulWidget {
   const _DiamondFab({
     this.child,
-    this.notchMargin: 6.0,
+    this.notchMargin = 6.0,
     this.onPressed,
   });
 

examples/flutter_gallery/lib/demo/material/expansion_panels_demo.dart

@@ -77,7 +77,7 @@ class DualHeaderWithHint extends StatelessWidget {
 
 class CollapsibleBody extends StatelessWidget {
   const CollapsibleBody({
-    this.margin: EdgeInsets.zero,
+    this.margin = EdgeInsets.zero,
     this.child,
     this.onSave,
     this.onCancel

examples/flutter_gallery/lib/demo/material/grid_list_demo.dart

@@ -21,7 +21,7 @@ class Photo {
     this.assetPackage,
     this.title,
     this.caption,
-    this.isFavorite: false,
+    this.isFavorite = false,
   });
 
   final String assetName;

examples/flutter_gallery/lib/demo/material/slider_demo.dart

@@ -13,7 +13,7 @@ class SliderDemo extends StatefulWidget {
   _SliderDemoState createState() => new _SliderDemoState();
 }
 
-Path _triangle(double size, Offset thumbCenter, {bool invert: false}) {
+Path _triangle(double size, Offset thumbCenter, {bool invert = false}) {
   final Path thumbPath = new Path();
   final double height = math.sqrt(3.0) / 2.0;
   final double halfSide = size / 2.0;

examples/flutter_gallery/lib/demo/pesto_demo.dart

@@ -45,9 +45,9 @@ class PestoFavorites extends StatelessWidget {
 
 class PestoStyle extends TextStyle {
   const PestoStyle({
-    double fontSize: 12.0,
+    double fontSize = 12.0,
     FontWeight fontWeight,
-    Color color: Colors.black87,
+    Color color = Colors.black87,
     double letterSpacing,
     double height,
   }) : super(

examples/flutter_gallery/lib/demo/shrine/shrine_types.dart

@@ -70,7 +70,7 @@ class Product {
 }
 
 class Order {
-  Order({ @required this.product, this.quantity: 1, this.inCart: false })
+  Order({ @required this.product, this.quantity = 1, this.inCart = false })
     : assert(product != null),
       assert(quantity != null && quantity >= 0),
       assert(inCart != null);

examples/flutter_gallery/lib/demo/video_demo.dart

@@ -206,7 +206,7 @@ class FadeAnimation extends StatefulWidget {
 
   const FadeAnimation({
     this.child,
-    this.duration: const Duration(milliseconds: 500),
+    this.duration = const Duration(milliseconds: 500),
   });
 
   @override

examples/flutter_gallery/lib/gallery/app.dart

@@ -21,11 +21,11 @@ class GalleryApp extends StatefulWidget {
   const GalleryApp({
     Key key,
     this.updateUrlFetcher,
-    this.enablePerformanceOverlay: true,
+    this.enablePerformanceOverlay = true,
-    this.enableRasterCacheImagesCheckerboard: true,
+    this.enableRasterCacheImagesCheckerboard = true,
-    this.enableOffscreenLayersCheckerboard: true,
+    this.enableOffscreenLayersCheckerboard = true,
     this.onSendFeedback,
-    this.testMode: false,
+    this.testMode = false,
   }) : super(key: key);
 
   final UpdateUrlFetcher updateUrlFetcher;

examples/flutter_gallery/lib/gallery/backdrop.dart

@@ -79,7 +79,7 @@ class _TappableWhileStatusIsState extends State<_TappableWhileStatusIs> {
 class _CrossFadeTransition extends AnimatedWidget {
   const _CrossFadeTransition({
     Key key,
-    this.alignment: Alignment.center,
+    this.alignment = Alignment.center,
     Animation<double> progress,
     this.child0,
     this.child1,
@@ -130,7 +130,7 @@ class _CrossFadeTransition extends AnimatedWidget {
 class _BackAppBar extends StatelessWidget {
   const _BackAppBar({
     Key key,
-    this.leading: const SizedBox(width: 56.0),
+    this.leading = const SizedBox(width: 56.0),
     @required this.title,
     this.trailing,
   }) : assert(leading != null), assert(title != null), super(key: key);

examples/flutter_gallery/lib/gallery/home.dart

@@ -270,7 +270,7 @@ class GalleryHome extends StatefulWidget {
 
   const GalleryHome({
     Key key,
-    this.testMode: false,
+    this.testMode = false,
     this.optionsPage,
   }) : super(key: key);
 

examples/flutter_gallery/lib/gallery/options.dart

@@ -12,12 +12,12 @@ class GalleryOptions {
   GalleryOptions({
     this.theme,
     this.textScaleFactor,
-    this.textDirection: TextDirection.ltr,
+    this.textDirection = TextDirection.ltr,
-    this.timeDilation: 1.0,
+    this.timeDilation = 1.0,
     this.platform,
-    this.showOffscreenLayersCheckerboard: false,
+    this.showOffscreenLayersCheckerboard = false,
-    this.showRasterCacheImagesCheckerboard: false,
+    this.showRasterCacheImagesCheckerboard = false,
-    this.showPerformanceOverlay: false,
+    this.showPerformanceOverlay = false,
   });
 
   final GalleryTheme theme;

examples/flutter_gallery/test/example_code_parser_test.dart

@@ -44,7 +44,7 @@ class TestAssetBundle extends AssetBundle {
   Future<ByteData> load(String key) => null;
 
   @override
-  Future<String> loadString(String key, { bool cache: true }) {
+  Future<String> loadString(String key, { bool cache = true }) {
     if (key == 'lib/gallery/example_code.dart')
       return new Future<String>.value(testCodeFile);
     return null;

examples/layers/rendering/src/sector_layout.dart

@@ -11,14 +11,14 @@ const double kTwoPi = 2 * math.pi;
 
 class SectorConstraints extends Constraints {
   const SectorConstraints({
-    this.minDeltaRadius: 0.0,
+    this.minDeltaRadius = 0.0,
-    this.maxDeltaRadius: double.infinity,
+    this.maxDeltaRadius = double.infinity,
-    this.minDeltaTheta: 0.0,
+    this.minDeltaTheta = 0.0,
-    this.maxDeltaTheta: kTwoPi
+    this.maxDeltaTheta = kTwoPi
   }) : assert(maxDeltaRadius >= minDeltaRadius),
        assert(maxDeltaTheta >= minDeltaTheta);
 
-  const SectorConstraints.tight({ double deltaRadius: 0.0, double deltaTheta: 0.0 })
+  const SectorConstraints.tight({ double deltaRadius = 0.0, double deltaTheta = 0.0 })
     : minDeltaRadius = deltaRadius,
       maxDeltaRadius = deltaRadius,
       minDeltaTheta = deltaTheta,
@@ -45,7 +45,7 @@ class SectorConstraints extends Constraints {
 
   @override
   bool debugAssertIsValid({
-    bool isAppliedConstraint: false,
+    bool isAppliedConstraint = false,
     InformationCollector informationCollector
   }) {
     assert(isNormalized);
@@ -54,11 +54,11 @@ class SectorConstraints extends Constraints {
 }
 
 class SectorDimensions {
-  const SectorDimensions({ this.deltaRadius: 0.0, this.deltaTheta: 0.0 });
+  const SectorDimensions({ this.deltaRadius = 0.0, this.deltaTheta = 0.0 });
 
   factory SectorDimensions.withConstraints(
     SectorConstraints constraints,
-    { double deltaRadius: 0.0, double deltaTheta: 0.0 }
+    { double deltaRadius = 0.0, double deltaTheta = 0.0 }
   ) {
     return new SectorDimensions(
       deltaRadius: constraints.constrainDeltaRadius(deltaRadius),
@@ -215,8 +215,8 @@ class RenderSectorRing extends RenderSectorWithChildren {
 
   RenderSectorRing({
     BoxDecoration decoration,
-    double deltaRadius: double.infinity,
+    double deltaRadius = double.infinity,
-    double padding: 0.0
+    double padding = 0.0
   }) : _padding = padding,
        assert(deltaRadius >= 0.0),
        _desiredDeltaRadius = deltaRadius,
@@ -333,8 +333,8 @@ class RenderSectorSlice extends RenderSectorWithChildren {
 
   RenderSectorSlice({
     BoxDecoration decoration,
-    double deltaTheta: kTwoPi,
+    double deltaTheta = kTwoPi,
-    double padding: 0.0
+    double padding = 0.0
   }) : _padding = padding, _desiredDeltaTheta = deltaTheta, super(decoration);
 
   double _desiredDeltaTheta;
@@ -440,7 +440,7 @@ class RenderSectorSlice extends RenderSectorWithChildren {
 
 class RenderBoxToRenderSectorAdapter extends RenderBox with RenderObjectWithChildMixin<RenderSector> {
 
-  RenderBoxToRenderSectorAdapter({ double innerRadius: 0.0, RenderSector child }) :
+  RenderBoxToRenderSectorAdapter({ double innerRadius = 0.0, RenderSector child }) :
     _innerRadius = innerRadius {
     this.child = child;
   }
@@ -487,8 +487,8 @@ class RenderBoxToRenderSectorAdapter extends RenderBox with RenderObjectWithChil
   }
 
   Size getIntrinsicDimensions({
-    double width: double.infinity,
+    double width = double.infinity,
-    double height: double.infinity
+    double height = double.infinity
   }) {
     assert(child is RenderSector);
     assert(child.parentData is SectorParentData);
@@ -555,8 +555,8 @@ class RenderBoxToRenderSectorAdapter extends RenderBox with RenderObjectWithChil
 
 class RenderSolidColor extends RenderDecoratedSector {
   RenderSolidColor(this.backgroundColor, {
-    this.desiredDeltaRadius: double.infinity,
+    this.desiredDeltaRadius = double.infinity,
-    this.desiredDeltaTheta: kTwoPi
+    this.desiredDeltaTheta = kTwoPi
   }) : super(new BoxDecoration(color: backgroundColor));
 
   double desiredDeltaRadius;

examples/layers/rendering/src/solid_color_box.dart

@@ -9,7 +9,7 @@ class RenderSolidColorBox extends RenderDecoratedBox {
   final Size desiredSize;
   final Color backgroundColor;
 
-  RenderSolidColorBox(this.backgroundColor, { this.desiredSize: Size.infinite })
+  RenderSolidColorBox(this.backgroundColor, { this.desiredSize = Size.infinite })
       : super(decoration: new BoxDecoration(color: backgroundColor));
 
   @override

examples/layers/widgets/spinning_mixed.dart

@@ -8,7 +8,7 @@ import 'package:flutter/rendering.dart';
 import '../rendering/src/solid_color_box.dart';
 
 // Solid colour, RenderObject version
-void addFlexChildSolidColor(RenderFlex parent, Color backgroundColor, { int flex: 0 }) {
+void addFlexChildSolidColor(RenderFlex parent, Color backgroundColor, { int flex = 0 }) {
   final RenderSolidColorBox child = new RenderSolidColorBox(backgroundColor);
   parent.add(child);
   final FlexParentData childParentData = child.parentData;

packages/flutter/lib/src/animation/animation_controller.dart

@@ -118,8 +118,8 @@ class AnimationController extends Animation<double>
     double value,
     this.duration,
     this.debugLabel,
-    this.lowerBound: 0.0,
+    this.lowerBound = 0.0,
-    this.upperBound: 1.0,
+    this.upperBound = 1.0,
     @required TickerProvider vsync,
   }) : assert(lowerBound != null),
        assert(upperBound != null),
@@ -147,7 +147,7 @@ class AnimationController extends Animation<double>
   /// physics simulation, especially when the physics simulation has no
   /// pre-determined bounds.
   AnimationController.unbounded({
-    double value: 0.0,
+    double value = 0.0,
     this.duration,
     this.debugLabel,
     @required TickerProvider vsync,
@@ -358,12 +358,12 @@ class AnimationController extends Animation<double>
   /// regardless of whether `target` > [value] or not. At the end of the
   /// animation, when `target` is reached, [status] is reported as
   /// [AnimationStatus.completed].
-  TickerFuture animateTo(double target, { Duration duration, Curve curve: Curves.linear }) {
+  TickerFuture animateTo(double target, { Duration duration, Curve curve = Curves.linear }) {
     _direction = _AnimationDirection.forward;
     return _animateToInternal(target, duration: duration, curve: curve);
   }
 
-  TickerFuture _animateToInternal(double target, { Duration duration, Curve curve: Curves.linear }) {
+  TickerFuture _animateToInternal(double target, { Duration duration, Curve curve = Curves.linear }) {
     Duration simulationDuration = duration;
     if (simulationDuration == null) {
       assert(() {
@@ -441,7 +441,7 @@ class AnimationController extends Animation<double>
   /// The most recently returned [TickerFuture], if any, is marked as having been
   /// canceled, meaning the future never completes and its [TickerFuture.orCancel]
   /// derivative future completes with a [TickerCanceled] error.
-  TickerFuture fling({ double velocity: 1.0 }) {
+  TickerFuture fling({ double velocity = 1.0 }) {
     _direction = velocity < 0.0 ? _AnimationDirection.reverse : _AnimationDirection.forward;
     final double target = velocity < 0.0 ? lowerBound - _kFlingTolerance.distance
                                          : upperBound + _kFlingTolerance.distance;
@@ -493,7 +493,7 @@ class AnimationController extends Animation<double>
   ///    and which does send notifications.
   ///  * [forward], [reverse], [animateTo], [animateWith], [fling], and [repeat],
   ///    which restart the animation controller.
-  void stop({ bool canceled: true }) {
+  void stop({ bool canceled = true }) {
     _simulation = null;
     _lastElapsedDuration = null;
     _ticker.stop(canceled: canceled);

packages/flutter/lib/src/animation/curves.dart

@@ -95,7 +95,7 @@ class Interval extends Curve {
   /// Creates an interval curve.
   ///
   /// The arguments must not be null.
-  const Interval(this.begin, this.end, { this.curve: Curves.linear })
+  const Interval(this.begin, this.end, { this.curve = Curves.linear })
       : assert(begin != null),
         assert(end != null),
         assert(curve != null);

packages/flutter/lib/src/cupertino/activity_indicator.dart

@@ -19,8 +19,8 @@ class CupertinoActivityIndicator extends StatefulWidget {
   /// Creates an iOS-style activity indicator.
   const CupertinoActivityIndicator({
     Key key,
-    this.animating: true,
+    this.animating = true,
-    this.radius: _kDefaultIndicatorRadius,
+    this.radius = _kDefaultIndicatorRadius,
   }) : assert(animating != null),
        assert(radius != null),
        assert(radius > 0),

packages/flutter/lib/src/cupertino/bottom_tab_bar.dart

@@ -39,11 +39,11 @@ class CupertinoTabBar extends StatelessWidget implements PreferredSizeWidget {
     Key key,
     @required this.items,
     this.onTap,
-    this.currentIndex: 0,
+    this.currentIndex = 0,
-    this.backgroundColor: _kDefaultTabBarBackgroundColor,
+    this.backgroundColor = _kDefaultTabBarBackgroundColor,
-    this.activeColor: CupertinoColors.activeBlue,
+    this.activeColor = CupertinoColors.activeBlue,
-    this.inactiveColor: CupertinoColors.inactiveGray,
+    this.inactiveColor = CupertinoColors.inactiveGray,
-    this.iconSize: 30.0,
+    this.iconSize = 30.0,
   }) : assert(items != null),
        assert(items.length >= 2),
        assert(currentIndex != null),

packages/flutter/lib/src/cupertino/button.dart

@@ -50,9 +50,9 @@ class CupertinoButton extends StatefulWidget {
     @required this.child,
     this.padding,
     this.color,
-    this.minSize: 44.0,
+    this.minSize = 44.0,
-    this.pressedOpacity: 0.1,
+    this.pressedOpacity = 0.1,
-    this.borderRadius: const BorderRadius.all(const Radius.circular(8.0)),
+    this.borderRadius = const BorderRadius.all(const Radius.circular(8.0)),
     @required this.onPressed,
   }) : assert(pressedOpacity == null || (pressedOpacity >= 0.0 && pressedOpacity <= 1.0));
 

packages/flutter/lib/src/cupertino/dialog.dart

@@ -134,7 +134,7 @@ class CupertinoAlertDialog extends StatelessWidget {
     Key key,
     this.title,
     this.content,
-    this.actions: const <Widget>[],
+    this.actions = const <Widget>[],
     this.scrollController,
     this.actionScrollController,
   })  : assert(actions != null),
@@ -229,8 +229,8 @@ class CupertinoDialogAction extends StatelessWidget {
   /// Creates an action for an iOS-style dialog.
   const CupertinoDialogAction({
     this.onPressed,
-    this.isDefaultAction: false,
+    this.isDefaultAction = false,
-    this.isDestructiveAction: false,
+    this.isDestructiveAction = false,
     @required this.child,
   }) : assert(child != null);
 

packages/flutter/lib/src/cupertino/nav_bar.dart

@@ -82,12 +82,12 @@ class CupertinoNavigationBar extends StatelessWidget implements ObstructingPrefe
   const CupertinoNavigationBar({
     Key key,
     this.leading,
-    this.automaticallyImplyLeading: true,
+    this.automaticallyImplyLeading = true,
     this.middle,
     this.trailing,
-    this.border: _kDefaultNavBarBorder,
+    this.border = _kDefaultNavBarBorder,
-    this.backgroundColor: _kDefaultNavBarBackgroundColor,
+    this.backgroundColor = _kDefaultNavBarBackgroundColor,
-    this.actionsForegroundColor: CupertinoColors.activeBlue,
+    this.actionsForegroundColor = CupertinoColors.activeBlue,
   }) : assert(automaticallyImplyLeading != null),
        super(key: key);
 
@@ -192,11 +192,11 @@ class CupertinoSliverNavigationBar extends StatelessWidget {
     Key key,
     @required this.largeTitle,
     this.leading,
-    this.automaticallyImplyLeading: true,
+    this.automaticallyImplyLeading = true,
     this.middle,
     this.trailing,
-    this.backgroundColor: _kDefaultNavBarBackgroundColor,
+    this.backgroundColor = _kDefaultNavBarBackgroundColor,
-    this.actionsForegroundColor: CupertinoColors.activeBlue,
+    this.actionsForegroundColor = CupertinoColors.activeBlue,
   }) : assert(largeTitle != null),
        assert(automaticallyImplyLeading != null),
        super(key: key);
@@ -447,8 +447,8 @@ class _CupertinoLargeTitleNavigationBarSliverDelegate
     this.automaticallyImplyLeading,
     this.middle,
     this.trailing,
-    this.border: _kDefaultNavBarBorder,
+    this.border = _kDefaultNavBarBorder,
-    this.backgroundColor: _kDefaultNavBarBackgroundColor,
+    this.backgroundColor = _kDefaultNavBarBackgroundColor,
     this.actionsForegroundColor,
   }) : assert(persistentHeight != null);
 

packages/flutter/lib/src/cupertino/page_scaffold.dart

@@ -21,7 +21,7 @@ class CupertinoPageScaffold extends StatelessWidget {
   const CupertinoPageScaffold({
     Key key,
     this.navigationBar,
-    this.backgroundColor: CupertinoColors.white,
+    this.backgroundColor = CupertinoColors.white,
     @required this.child,
   }) : assert(child != null),
        super(key: key);

packages/flutter/lib/src/cupertino/picker.dart

@@ -40,8 +40,8 @@ class CupertinoPicker extends StatefulWidget {
   /// than using [Colors.transparent].
   const CupertinoPicker({
     Key key,
-    this.diameterRatio: _kDefaultDiameterRatio,
+    this.diameterRatio = _kDefaultDiameterRatio,
-    this.backgroundColor: _kDefaultBackground,
+    this.backgroundColor = _kDefaultBackground,
     this.scrollController,
     @required this.itemExtent,
     @required this.onSelectedItemChanged,

packages/flutter/lib/src/cupertino/refresh.dart

@@ -14,8 +14,8 @@ import 'icons.dart';
 
 class _CupertinoRefreshSliver extends SingleChildRenderObjectWidget {
   const _CupertinoRefreshSliver({
-    this.refreshIndicatorLayoutExtent: 0.0,
+    this.refreshIndicatorLayoutExtent = 0.0,
-    this.hasLayoutExtent: false,
+    this.hasLayoutExtent = false,
     Widget child,
   }) : assert(refreshIndicatorLayoutExtent != null),
        assert(refreshIndicatorLayoutExtent >= 0.0),
@@ -266,9 +266,9 @@ class CupertinoRefreshControl extends StatefulWidget {
   ///
   /// [onRefresh] will be called when pulled far enough to trigger a refresh.
   const CupertinoRefreshControl({
-    this.refreshTriggerPullDistance: _defaultRefreshTriggerPullDistance,
+    this.refreshTriggerPullDistance = _defaultRefreshTriggerPullDistance,
-    this.refreshIndicatorExtent: _defaultRefreshIndicatorExtent,
+    this.refreshIndicatorExtent = _defaultRefreshIndicatorExtent,
-    this.builder: buildSimpleRefreshIndicator,
+    this.builder = buildSimpleRefreshIndicator,
     this.onRefresh,
   }) : assert(refreshTriggerPullDistance != null),
        assert(refreshTriggerPullDistance > 0.0),

packages/flutter/lib/src/cupertino/route.dart

@@ -80,8 +80,8 @@ class CupertinoPageRoute<T> extends PageRoute<T> {
   CupertinoPageRoute({
     @required this.builder,
     RouteSettings settings,
-    this.maintainState: true,
+    this.maintainState = true,
-    bool fullscreenDialog: false,
+    bool fullscreenDialog = false,
     this.hostRoute,
   }) : assert(builder != null),
        assert(maintainState != null),

packages/flutter/lib/src/cupertino/slider.dart

@@ -54,10 +54,10 @@ class CupertinoSlider extends StatefulWidget {
     @required this.onChanged,
     this.onChangeStart,
     this.onChangeEnd,
-    this.min: 0.0,
+    this.min = 0.0,
-    this.max: 1.0,
+    this.max = 1.0,
     this.divisions,
-    this.activeColor: CupertinoColors.activeBlue,
+    this.activeColor = CupertinoColors.activeBlue,
   }) : assert(value != null),
        assert(min != null),
        assert(max != null),

packages/flutter/lib/src/cupertino/switch.dart

@@ -51,7 +51,7 @@ class CupertinoSwitch extends StatefulWidget {
     Key key,
     @required this.value,
     @required this.onChanged,
-    this.activeColor: CupertinoColors.activeGreen,
+    this.activeColor = CupertinoColors.activeGreen,
   }) : super(key: key);
 
   /// Whether this switch is on or off.

packages/flutter/lib/src/cupertino/tab_view.dart

@@ -41,7 +41,7 @@ class CupertinoTabView extends StatelessWidget {
     this.routes,
     this.onGenerateRoute,
     this.onUnknownRoute,
-    this.navigatorObservers: const <NavigatorObserver>[],
+    this.navigatorObservers = const <NavigatorObserver>[],
   }) : assert(navigatorObservers != null),
        super(key: key);
 

packages/flutter/lib/src/cupertino/thumb_painter.dart

@@ -12,8 +12,8 @@ import 'colors.dart';
 class CupertinoThumbPainter {
   /// Creates an object that paints an iOS-style slider thumb.
   CupertinoThumbPainter({
-    this.color: CupertinoColors.white,
+    this.color = CupertinoColors.white,
-    this.shadowColor: const Color(0x2C000000),
+    this.shadowColor = const Color(0x2C000000),
   }) : _shadowPaint = new BoxShadow(
          color: shadowColor,
          blurRadius: 1.0,

packages/flutter/lib/src/foundation/assertions.dart

@@ -28,11 +28,11 @@ class FlutterErrorDetails {
   const FlutterErrorDetails({
     this.exception,
     this.stack,
-    this.library: 'Flutter framework',
+    this.library = 'Flutter framework',
     this.context,
     this.stackFilter,
     this.informationCollector,
-    this.silent: false
+    this.silent = false
   });
 
   /// The exception. Often this will be an [AssertionError], maybe specifically
@@ -250,7 +250,7 @@ class FlutterError extends AssertionError {
   /// had not been called before (so the next message is verbose again).
   ///
   /// The default behavior for the [onError] handler is to call this function.
-  static void dumpErrorToConsole(FlutterErrorDetails details, { bool forceReport: false }) {
+  static void dumpErrorToConsole(FlutterErrorDetails details, { bool forceReport = false }) {
     assert(details != null);
     assert(details.exception != null);
     bool reportError = details.silent != true; // could be null

packages/flutter/lib/src/foundation/basic_types.dart

@@ -239,7 +239,7 @@ class CachingIterable<E> extends IterableBase<E> {
   }
 
   @override
-  List<E> toList({ bool growable: true }) {
+  List<E> toList({ bool growable = true }) {
     _precacheEntireList();
     return new List<E>.from(_results, growable: growable);
   }

packages/flutter/lib/src/foundation/debug.dart

@@ -21,7 +21,7 @@ import 'print.dart';
 ///
 /// See [https://docs.flutter.io/flutter/foundation/foundation-library.html] for
 /// a complete list.
-bool debugAssertAllFoundationVarsUnset(String reason, { DebugPrintCallback debugPrintOverride: debugPrintThrottled }) {
+bool debugAssertAllFoundationVarsUnset(String reason, { DebugPrintCallback debugPrintOverride = debugPrintThrottled }) {
   assert(() {
     if (debugPrint != debugPrintOverride ||
         debugDefaultTargetPlatformOverride != null)

packages/flutter/lib/src/foundation/diagnostics.dart

@@ -135,19 +135,19 @@ class TextTreeConfiguration {
     @required this.linkCharacter,
     @required this.propertyPrefixIfChildren,
     @required this.propertyPrefixNoChildren,
-    this.lineBreak: '\n',
+    this.lineBreak = '\n',
-    this.lineBreakProperties: true,
+    this.lineBreakProperties = true,
-    this.afterName: ':',
+    this.afterName = ':',
-    this.afterDescriptionIfBody: '',
+    this.afterDescriptionIfBody = '',
-    this.beforeProperties: '',
+    this.beforeProperties = '',
-    this.afterProperties: '',
+    this.afterProperties = '',
-    this.propertySeparator: '',
+    this.propertySeparator = '',
-    this.bodyIndent: '',
+    this.bodyIndent = '',
-    this.footer: '',
+    this.footer = '',
-    this.showChildren: true,
+    this.showChildren = true,
-    this.addBlankLineIfNoChildren: true,
+    this.addBlankLineIfNoChildren = true,
-    this.isNameOnOwnLine: false,
+    this.isNameOnOwnLine = false,
-    this.isBlankLineBetweenPropertiesAndChildren: true,
+    this.isBlankLineBetweenPropertiesAndChildren = true,
   }) : assert(prefixLineOne != null),
        assert(prefixOtherLines != null),
        assert(prefixLastChildLineOne != null),
@@ -639,8 +639,8 @@ abstract class DiagnosticsNode {
   DiagnosticsNode({
     @required this.name,
     this.style,
-    this.showName: true,
+    this.showName = true,
-    this.showSeparator: true,
+    this.showSeparator = true,
   }) : assert(showName != null),
        assert(showSeparator != null),
        // A name ending with ':' indicates that the user forgot that the ':' will
@@ -659,8 +659,8 @@ abstract class DiagnosticsNode {
   ///    formatted like a property with a separate name and message.
   factory DiagnosticsNode.message(
     String message, {
-    DiagnosticsTreeStyle style: DiagnosticsTreeStyle.singleLine,
+    DiagnosticsTreeStyle style = DiagnosticsTreeStyle.singleLine,
-    DiagnosticLevel level: DiagnosticLevel.info,
+    DiagnosticLevel level = DiagnosticLevel.info,
   }) {
     assert(style != null);
     assert(level != null);
@@ -782,7 +782,7 @@ abstract class DiagnosticsNode {
   @override
   String toString({
     TextTreeConfiguration parentConfiguration,
-    DiagnosticLevel minLevel: DiagnosticLevel.info,
+    DiagnosticLevel minLevel = DiagnosticLevel.info,
   }) {
     assert(style != null);
     assert(minLevel != null);
@@ -853,10 +853,10 @@ abstract class DiagnosticsNode {
   ///  * [toStringShallow], for a detailed description of the [value] but not its
   ///    children.
   String toStringDeep({
-    String prefixLineOne: '',
+    String prefixLineOne = '',
     String prefixOtherLines,
     TextTreeConfiguration parentConfiguration,
-    DiagnosticLevel minLevel: DiagnosticLevel.debug,
+    DiagnosticLevel minLevel = DiagnosticLevel.debug,
   }) {
     assert(minLevel != null);
     prefixOtherLines ??= prefixLineOne;
@@ -1041,7 +1041,7 @@ class MessageProperty extends DiagnosticsProperty<Null> {
   ///
   /// The [name], `message`, and [level] arguments must not be null.
   MessageProperty(String name, String message, {
-    DiagnosticLevel level: DiagnosticLevel.info,
+    DiagnosticLevel level = DiagnosticLevel.info,
   }) : assert(name != null),
        assert(message != null),
        assert(level != null),
@@ -1061,11 +1061,11 @@ class StringProperty extends DiagnosticsProperty<String> {
   StringProperty(String name, String value, {
     String description,
     String tooltip,
-    bool showName: true,
+    bool showName = true,
-    Object defaultValue: kNoDefaultValue,
+    Object defaultValue = kNoDefaultValue,
-    this.quoted: true,
+    this.quoted = true,
     String ifEmpty,
-    DiagnosticLevel level: DiagnosticLevel.info,
+    DiagnosticLevel level = DiagnosticLevel.info,
   }) : assert(showName != null),
        assert(quoted != null),
        assert(level != null),
@@ -1118,10 +1118,10 @@ abstract class _NumProperty<T extends num> extends DiagnosticsProperty<T> {
     T value, {
     String ifNull,
     this.unit,
-    bool showName: true,
+    bool showName = true,
-    Object defaultValue: kNoDefaultValue,
+    Object defaultValue = kNoDefaultValue,
     String tooltip,
-    DiagnosticLevel level: DiagnosticLevel.info,
+    DiagnosticLevel level = DiagnosticLevel.info,
   }) : super(
     name,
     value,
@@ -1136,10 +1136,10 @@ abstract class _NumProperty<T extends num> extends DiagnosticsProperty<T> {
     ComputePropertyValueCallback<T> computeValue, {
     String ifNull,
     this.unit,
-    bool showName: true,
+    bool showName = true,
-    Object defaultValue: kNoDefaultValue,
+    Object defaultValue = kNoDefaultValue,
     String tooltip,
-    DiagnosticLevel level: DiagnosticLevel.info,
+    DiagnosticLevel level = DiagnosticLevel.info,
   }) : super.lazy(
     name,
     computeValue,
@@ -1189,9 +1189,9 @@ class DoubleProperty extends _NumProperty<double> {
     String ifNull,
     String unit,
     String tooltip,
-    Object defaultValue: kNoDefaultValue,
+    Object defaultValue = kNoDefaultValue,
-    bool showName: true,
+    bool showName = true,
-    DiagnosticLevel level: DiagnosticLevel.info,
+    DiagnosticLevel level = DiagnosticLevel.info,
   }) : assert(showName != null),
        assert(level != null),
        super(
@@ -1215,11 +1215,11 @@ class DoubleProperty extends _NumProperty<double> {
     String name,
     ComputePropertyValueCallback<double> computeValue, {
     String ifNull,
-    bool showName: true,
+    bool showName = true,
     String unit,
     String tooltip,
-    Object defaultValue: kNoDefaultValue,
+    Object defaultValue = kNoDefaultValue,
-    DiagnosticLevel level: DiagnosticLevel.info,
+    DiagnosticLevel level = DiagnosticLevel.info,
   }) : assert(showName != null),
        assert(level != null),
        super.lazy(
@@ -1246,10 +1246,10 @@ class IntProperty extends _NumProperty<int> {
   /// The [showName] and [level] arguments must not be null.
   IntProperty(String name, int value, {
     String ifNull,
-    bool showName: true,
+    bool showName = true,
     String unit,
-    Object defaultValue: kNoDefaultValue,
+    Object defaultValue = kNoDefaultValue,
-    DiagnosticLevel level: DiagnosticLevel.info,
+    DiagnosticLevel level = DiagnosticLevel.info,
   }) : assert(showName != null),
        assert(level != null),
        super(
@@ -1279,10 +1279,10 @@ class PercentProperty extends DoubleProperty {
   /// The [showName] and [level] arguments must not be null.
   PercentProperty(String name, double fraction, {
     String ifNull,
-    bool showName: true,
+    bool showName = true,
     String tooltip,
     String unit,
-    DiagnosticLevel level : DiagnosticLevel.info,
+    DiagnosticLevel level  = DiagnosticLevel.info,
   }) : assert(showName != null),
        assert(level != null),
        super(
@@ -1357,9 +1357,9 @@ class FlagProperty extends DiagnosticsProperty<bool> {
     @required bool value,
     this.ifTrue,
     this.ifFalse,
-    bool showName: false,
+    bool showName = false,
     Object defaultValue,
-    DiagnosticLevel level: DiagnosticLevel.info,
+    DiagnosticLevel level = DiagnosticLevel.info,
   }) : assert(showName != null),
        assert(level != null),
        assert(ifTrue != null || ifFalse != null),
@@ -1449,12 +1449,12 @@ class IterableProperty<T> extends DiagnosticsProperty<Iterable<T>> {
   ///
   /// The [style], [showName], and [level] arguments must not be null.
   IterableProperty(String name, Iterable<T> value, {
-    Object defaultValue: kNoDefaultValue,
+    Object defaultValue = kNoDefaultValue,
     String ifNull,
-    String ifEmpty: '[]',
+    String ifEmpty = '[]',
-    DiagnosticsTreeStyle style: DiagnosticsTreeStyle.singleLine,
+    DiagnosticsTreeStyle style = DiagnosticsTreeStyle.singleLine,
-    bool showName: true,
+    bool showName = true,
-    DiagnosticLevel level: DiagnosticLevel.info,
+    DiagnosticLevel level = DiagnosticLevel.info,
   }) : assert(style != null),
        assert(showName != null),
        assert(level != null),
@@ -1524,8 +1524,8 @@ class EnumProperty<T> extends DiagnosticsProperty<T> {
   ///
   /// The [level] argument must also not be null.
   EnumProperty(String name, T value, {
-    Object defaultValue: kNoDefaultValue,
+    Object defaultValue = kNoDefaultValue,
-    DiagnosticLevel level : DiagnosticLevel.info,
+    DiagnosticLevel level  = DiagnosticLevel.info,
   }) : assert(level != null),
        super (
     name,
@@ -1570,8 +1570,8 @@ class ObjectFlagProperty<T> extends DiagnosticsProperty<T> {
   ObjectFlagProperty(String name, T value, {
     this.ifPresent,
     String ifNull,
-    bool showName: false,
+    bool showName = false,
-    DiagnosticLevel level : DiagnosticLevel.info,
+    DiagnosticLevel level  = DiagnosticLevel.info,
   }) : assert(ifPresent != null || ifNull != null),
        assert(showName != null),
        assert(level != null),
@@ -1592,7 +1592,7 @@ class ObjectFlagProperty<T> extends DiagnosticsProperty<T> {
   ObjectFlagProperty.has(
     String name,
     T value, {
-    DiagnosticLevel level: DiagnosticLevel.info,
+    DiagnosticLevel level = DiagnosticLevel.info,
   }) : assert(name != null),
        assert(level != null),
        ifPresent = 'has $name',
@@ -1686,13 +1686,13 @@ class DiagnosticsProperty<T> extends DiagnosticsNode {
     String description,
     String ifNull,
     this.ifEmpty,
-    bool showName: true,
+    bool showName = true,
-    bool showSeparator: true,
+    bool showSeparator = true,
-    this.defaultValue: kNoDefaultValue,
+    this.defaultValue = kNoDefaultValue,
     this.tooltip,
-    this.missingIfNull: false,
+    this.missingIfNull = false,
-    DiagnosticsTreeStyle style: DiagnosticsTreeStyle.singleLine,
+    DiagnosticsTreeStyle style = DiagnosticsTreeStyle.singleLine,
-    DiagnosticLevel level: DiagnosticLevel.info,
+    DiagnosticLevel level = DiagnosticLevel.info,
   }) : assert(showName != null),
        assert(showSeparator != null),
        assert(style != null),
@@ -1728,13 +1728,13 @@ class DiagnosticsProperty<T> extends DiagnosticsNode {
     String description,
     String ifNull,
     this.ifEmpty,
-    bool showName: true,
+    bool showName = true,
-    bool showSeparator: true,
+    bool showSeparator = true,
-    this.defaultValue: kNoDefaultValue,
+    this.defaultValue = kNoDefaultValue,
     this.tooltip,
-    this.missingIfNull: false,
+    this.missingIfNull = false,
-    DiagnosticsTreeStyle style: DiagnosticsTreeStyle.singleLine,
+    DiagnosticsTreeStyle style = DiagnosticsTreeStyle.singleLine,
-    DiagnosticLevel level: DiagnosticLevel.info,
+    DiagnosticLevel level = DiagnosticLevel.info,
   }) : assert(showName != null),
        assert(showSeparator != null),
        assert(defaultValue == kNoDefaultValue || defaultValue is T),
@@ -2117,7 +2117,7 @@ abstract class Diagnosticable {
   String toStringShort() => describeIdentity(this);
 
   @override
-  String toString({ DiagnosticLevel minLevel: DiagnosticLevel.debug }) {
+  String toString({ DiagnosticLevel minLevel = DiagnosticLevel.debug }) {
     return toDiagnosticsNode(style: DiagnosticsTreeStyle.singleLine).toString(minLevel: minLevel);
   }
 
@@ -2382,8 +2382,8 @@ abstract class DiagnosticableTree extends Diagnosticable {
   ///  * [toString], for a brief description of the object.
   ///  * [toStringDeep], for a description of the subtree rooted at this object.
   String toStringShallow({
-    String joiner: ', ',
+    String joiner = ', ',
-    DiagnosticLevel minLevel: DiagnosticLevel.debug,
+    DiagnosticLevel minLevel = DiagnosticLevel.debug,
   }) {
     final StringBuffer result = new StringBuffer();
     result.write(toString());
@@ -2415,9 +2415,9 @@ abstract class DiagnosticableTree extends Diagnosticable {
   ///  * [toStringShallow], for a detailed description of the object but not its
   ///    children.
   String toStringDeep({
-    String prefixLineOne: '',
+    String prefixLineOne = '',
     String prefixOtherLines,
-    DiagnosticLevel minLevel: DiagnosticLevel.debug,
+    DiagnosticLevel minLevel = DiagnosticLevel.debug,
   }) {
     return toDiagnosticsNode().toStringDeep(prefixLineOne: prefixLineOne, prefixOtherLines: prefixOtherLines, minLevel: minLevel);
   }
@@ -2466,14 +2466,14 @@ abstract class DiagnosticableTreeMixin implements DiagnosticableTree {
   factory DiagnosticableTreeMixin._() => null;
 
   @override
-  String toString({ DiagnosticLevel minLevel: DiagnosticLevel.debug }) {
+  String toString({ DiagnosticLevel minLevel = DiagnosticLevel.debug }) {
     return toDiagnosticsNode(style: DiagnosticsTreeStyle.singleLine).toString(minLevel: minLevel);
   }
 
   @override
   String toStringShallow({
-    String joiner: ', ',
+    String joiner = ', ',
-    DiagnosticLevel minLevel: DiagnosticLevel.debug,
+    DiagnosticLevel minLevel = DiagnosticLevel.debug,
   }) {
     final StringBuffer result = new StringBuffer();
     result.write(toStringShort());
@@ -2488,9 +2488,9 @@ abstract class DiagnosticableTreeMixin implements DiagnosticableTree {
 
   @override
   String toStringDeep({
-    String prefixLineOne: '',
+    String prefixLineOne = '',
     String prefixOtherLines,
-    DiagnosticLevel minLevel: DiagnosticLevel.debug,
+    DiagnosticLevel minLevel = DiagnosticLevel.debug,
   }) {
     return toDiagnosticsNode().toStringDeep(prefixLineOne: prefixLineOne, prefixOtherLines: prefixOtherLines, minLevel: minLevel);
   }

packages/flutter/lib/src/foundation/print.dart

@@ -103,7 +103,7 @@ enum _WordWrapParseMode { inSpace, inWord, atBreak }
 /// and so forth. It is only intended for formatting error messages.
 ///
 /// The default [debugPrint] implementation uses this for its line wrapping.
-Iterable<String> debugWordWrap(String message, int width, { String wrapIndent: '' }) sync* {
+Iterable<String> debugWordWrap(String message, int width, { String wrapIndent = '' }) sync* {
   if (message.length < width || message.trimLeft()[0] == '#') {
     yield message;
     return;

packages/flutter/lib/src/gestures/binding.dart

@@ -168,7 +168,7 @@ class FlutterErrorDetailsForPointerEventDispatcher extends FlutterErrorDetails {
     this.event,
     this.hitTestEntry,
     InformationCollector informationCollector,
-    bool silent: false
+    bool silent = false
   }) : super(
     exception: exception,
     stack: stack,

packages/flutter/lib/src/gestures/drag_details.dart

@@ -20,7 +20,7 @@ class DragDownDetails {
   /// Creates details for a [GestureDragDownCallback].
   ///
   /// The [globalPosition] argument must not be null.
-  DragDownDetails({ this.globalPosition: Offset.zero })
+  DragDownDetails({ this.globalPosition = Offset.zero })
     : assert(globalPosition != null);
 
   /// The global position at which the pointer contacted the screen.
@@ -52,7 +52,7 @@ class DragStartDetails {
   /// Creates details for a [GestureDragStartCallback].
   ///
   /// The [globalPosition] argument must not be null.
-  DragStartDetails({ this.sourceTimeStamp, this.globalPosition: Offset.zero })
+  DragStartDetails({ this.sourceTimeStamp, this.globalPosition = Offset.zero })
     : assert(globalPosition != null);
 
   /// Recorded timestamp of the source pointer event that triggered the drag
@@ -101,7 +101,7 @@ class DragUpdateDetails {
   /// The [globalPosition] argument must be provided and must not be null.
   DragUpdateDetails({
     this.sourceTimeStamp,
-    this.delta: Offset.zero,
+    this.delta = Offset.zero,
     this.primaryDelta,
     @required this.globalPosition
   }) : assert(delta != null),
@@ -165,7 +165,7 @@ class DragEndDetails {
   ///
   /// The [velocity] argument must not be null.
   DragEndDetails({
-    this.velocity: Velocity.zero,
+    this.velocity = Velocity.zero,
     this.primaryVelocity,
   }) : assert(velocity != null),
        assert(primaryVelocity == null

packages/flutter/lib/src/gestures/events.dart

@@ -94,27 +94,27 @@ abstract class PointerEvent {
   /// Abstract const constructor. This constructor enables subclasses to provide
   /// const constructors so that they can be used in const expressions.
   const PointerEvent({
-    this.timeStamp: Duration.zero,
+    this.timeStamp = Duration.zero,
-    this.pointer: 0,
+    this.pointer = 0,
-    this.kind: PointerDeviceKind.touch,
+    this.kind = PointerDeviceKind.touch,
-    this.device: 0,
+    this.device = 0,
-    this.position: Offset.zero,
+    this.position = Offset.zero,
-    this.delta: Offset.zero,
+    this.delta = Offset.zero,
-    this.buttons: 0,
+    this.buttons = 0,
-    this.down: false,
+    this.down = false,
-    this.obscured: false,
+    this.obscured = false,
-    this.pressure: 1.0,
+    this.pressure = 1.0,
-    this.pressureMin: 1.0,
+    this.pressureMin = 1.0,
-    this.pressureMax: 1.0,
+    this.pressureMax = 1.0,
-    this.distance: 0.0,
+    this.distance = 0.0,
-    this.distanceMax: 0.0,
+    this.distanceMax = 0.0,
-    this.radiusMajor: 0.0,
+    this.radiusMajor = 0.0,
-    this.radiusMinor: 0.0,
+    this.radiusMinor = 0.0,
-    this.radiusMin: 0.0,
+    this.radiusMin = 0.0,
-    this.radiusMax: 0.0,
+    this.radiusMax = 0.0,
-    this.orientation: 0.0,
+    this.orientation = 0.0,
-    this.tilt: 0.0,
+    this.tilt = 0.0,
-    this.synthesized: false,
+    this.synthesized = false,
   });
 
   /// Time of event dispatch, relative to an arbitrary timeline.
@@ -289,19 +289,19 @@ class PointerAddedEvent extends PointerEvent {
   ///
   /// All of the argument must be non-null.
   const PointerAddedEvent({
-    Duration timeStamp: Duration.zero,
+    Duration timeStamp = Duration.zero,
-    PointerDeviceKind kind: PointerDeviceKind.touch,
+    PointerDeviceKind kind = PointerDeviceKind.touch,
-    int device: 0,
+    int device = 0,
-    Offset position: Offset.zero,
+    Offset position = Offset.zero,
-    bool obscured: false,
+    bool obscured = false,
-    double pressureMin: 1.0,
+    double pressureMin = 1.0,
-    double pressureMax: 1.0,
+    double pressureMax = 1.0,
-    double distance: 0.0,
+    double distance = 0.0,
-    double distanceMax: 0.0,
+    double distanceMax = 0.0,
-    double radiusMin: 0.0,
+    double radiusMin = 0.0,
-    double radiusMax: 0.0,
+    double radiusMax = 0.0,
-    double orientation: 0.0,
+    double orientation = 0.0,
-    double tilt: 0.0
+    double tilt = 0.0
   }) : super(
     timeStamp: timeStamp,
     kind: kind,
@@ -328,15 +328,15 @@ class PointerRemovedEvent extends PointerEvent {
   ///
   /// All of the argument must be non-null.
   const PointerRemovedEvent({
-    Duration timeStamp: Duration.zero,
+    Duration timeStamp = Duration.zero,
-    PointerDeviceKind kind: PointerDeviceKind.touch,
+    PointerDeviceKind kind = PointerDeviceKind.touch,
-    int device: 0,
+    int device = 0,
-    bool obscured: false,
+    bool obscured = false,
-    double pressureMin: 1.0,
+    double pressureMin = 1.0,
-    double pressureMax: 1.0,
+    double pressureMax = 1.0,
-    double distanceMax: 0.0,
+    double distanceMax = 0.0,
-    double radiusMin: 0.0,
+    double radiusMin = 0.0,
-    double radiusMax: 0.0
+    double radiusMax = 0.0
   }) : super(
     timeStamp: timeStamp,
     kind: kind,
@@ -363,24 +363,24 @@ class PointerHoverEvent extends PointerEvent {
   ///
   /// All of the argument must be non-null.
   const PointerHoverEvent({
-    Duration timeStamp: Duration.zero,
+    Duration timeStamp = Duration.zero,
-    PointerDeviceKind kind: PointerDeviceKind.touch,
+    PointerDeviceKind kind = PointerDeviceKind.touch,
-    int device: 0,
+    int device = 0,
-    Offset position: Offset.zero,
+    Offset position = Offset.zero,
-    Offset delta: Offset.zero,
+    Offset delta = Offset.zero,
-    int buttons: 0,
+    int buttons = 0,
-    bool obscured: false,
+    bool obscured = false,
-    double pressureMin: 1.0,
+    double pressureMin = 1.0,
-    double pressureMax: 1.0,
+    double pressureMax = 1.0,
-    double distance: 0.0,
+    double distance = 0.0,
-    double distanceMax: 0.0,
+    double distanceMax = 0.0,
-    double radiusMajor: 0.0,
+    double radiusMajor = 0.0,
-    double radiusMinor: 0.0,
+    double radiusMinor = 0.0,
-    double radiusMin: 0.0,
+    double radiusMin = 0.0,
-    double radiusMax: 0.0,
+    double radiusMax = 0.0,
-    double orientation: 0.0,
+    double orientation = 0.0,
-    double tilt: 0.0,
+    double tilt = 0.0,
-    bool synthesized: false,
+    bool synthesized = false,
   }) : super(
     timeStamp: timeStamp,
     kind: kind,
@@ -410,23 +410,23 @@ class PointerDownEvent extends PointerEvent {
   ///
   /// All of the argument must be non-null.
   const PointerDownEvent({
-    Duration timeStamp: Duration.zero,
+    Duration timeStamp = Duration.zero,
-    int pointer: 0,
+    int pointer = 0,
-    PointerDeviceKind kind: PointerDeviceKind.touch,
+    PointerDeviceKind kind = PointerDeviceKind.touch,
-    int device: 0,
+    int device = 0,
-    Offset position: Offset.zero,
+    Offset position = Offset.zero,
-    int buttons: 0,
+    int buttons = 0,
-    bool obscured: false,
+    bool obscured = false,
-    double pressure: 1.0,
+    double pressure = 1.0,
-    double pressureMin: 1.0,
+    double pressureMin = 1.0,
-    double pressureMax: 1.0,
+    double pressureMax = 1.0,
-    double distanceMax: 0.0,
+    double distanceMax = 0.0,
-    double radiusMajor: 0.0,
+    double radiusMajor = 0.0,
-    double radiusMinor: 0.0,
+    double radiusMinor = 0.0,
-    double radiusMin: 0.0,
+    double radiusMin = 0.0,
-    double radiusMax: 0.0,
+    double radiusMax = 0.0,
-    double orientation: 0.0,
+    double orientation = 0.0,
-    double tilt: 0.0
+    double tilt = 0.0
   }) : super(
     timeStamp: timeStamp,
     pointer: pointer,
@@ -462,25 +462,25 @@ class PointerMoveEvent extends PointerEvent {
   ///
   /// All of the argument must be non-null.
   const PointerMoveEvent({
-    Duration timeStamp: Duration.zero,
+    Duration timeStamp = Duration.zero,
-    int pointer: 0,
+    int pointer = 0,
-    PointerDeviceKind kind: PointerDeviceKind.touch,
+    PointerDeviceKind kind = PointerDeviceKind.touch,
-    int device: 0,
+    int device = 0,
-    Offset position: Offset.zero,
+    Offset position = Offset.zero,
-    Offset delta: Offset.zero,
+    Offset delta = Offset.zero,
-    int buttons: 0,
+    int buttons = 0,
-    bool obscured: false,
+    bool obscured = false,
-    double pressure: 1.0,
+    double pressure = 1.0,
-    double pressureMin: 1.0,
+    double pressureMin = 1.0,
-    double pressureMax: 1.0,
+    double pressureMax = 1.0,
-    double distanceMax: 0.0,
+    double distanceMax = 0.0,
-    double radiusMajor: 0.0,
+    double radiusMajor = 0.0,
-    double radiusMinor: 0.0,
+    double radiusMinor = 0.0,
-    double radiusMin: 0.0,
+    double radiusMin = 0.0,
-    double radiusMax: 0.0,
+    double radiusMax = 0.0,
-    double orientation: 0.0,
+    double orientation = 0.0,
-    double tilt: 0.0,
+    double tilt = 0.0,
-    bool synthesized: false,
+    bool synthesized = false,
   }) : super(
     timeStamp: timeStamp,
     pointer: pointer,
@@ -512,21 +512,21 @@ class PointerUpEvent extends PointerEvent {
   ///
   /// All of the argument must be non-null.
   const PointerUpEvent({
-    Duration timeStamp: Duration.zero,
+    Duration timeStamp = Duration.zero,
-    int pointer: 0,
+    int pointer = 0,
-    PointerDeviceKind kind: PointerDeviceKind.touch,
+    PointerDeviceKind kind = PointerDeviceKind.touch,
-    int device: 0,
+    int device = 0,
-    Offset position: Offset.zero,
+    Offset position = Offset.zero,
-    int buttons: 0,
+    int buttons = 0,
-    bool obscured: false,
+    bool obscured = false,
-    double pressureMin: 1.0,
+    double pressureMin = 1.0,
-    double pressureMax: 1.0,
+    double pressureMax = 1.0,
-    double distance: 0.0,
+    double distance = 0.0,
-    double distanceMax: 0.0,
+    double distanceMax = 0.0,
-    double radiusMin: 0.0,
+    double radiusMin = 0.0,
-    double radiusMax: 0.0,
+    double radiusMax = 0.0,
-    double orientation: 0.0,
+    double orientation = 0.0,
-    double tilt: 0.0
+    double tilt = 0.0
   }) : super(
     timeStamp: timeStamp,
     pointer: pointer,
@@ -553,21 +553,21 @@ class PointerCancelEvent extends PointerEvent {
   ///
   /// All of the argument must be non-null.
   const PointerCancelEvent({
-    Duration timeStamp: Duration.zero,
+    Duration timeStamp = Duration.zero,
-    int pointer: 0,
+    int pointer = 0,
-    PointerDeviceKind kind: PointerDeviceKind.touch,
+    PointerDeviceKind kind = PointerDeviceKind.touch,
-    int device: 0,
+    int device = 0,
-    Offset position: Offset.zero,
+    Offset position = Offset.zero,
-    int buttons: 0,
+    int buttons = 0,
-    bool obscured: false,
+    bool obscured = false,
-    double pressureMin: 1.0,
+    double pressureMin = 1.0,
-    double pressureMax: 1.0,
+    double pressureMax = 1.0,
-    double distance: 0.0,
+    double distance = 0.0,
-    double distanceMax: 0.0,
+    double distanceMax = 0.0,
-    double radiusMin: 0.0,
+    double radiusMin = 0.0,
-    double radiusMax: 0.0,
+    double radiusMax = 0.0,
-    double orientation: 0.0,
+    double orientation = 0.0,
-    double tilt: 0.0
+    double tilt = 0.0
   }) : super(
     timeStamp: timeStamp,
     pointer: pointer,

packages/flutter/lib/src/gestures/multidrag.dart

@@ -526,7 +526,7 @@ class DelayedMultiDragGestureRecognizer extends MultiDragGestureRecognizer<_Dela
   /// defaults to [kLongPressTimeout] to match [LongPressGestureRecognizer] but
   /// can be changed for specific behaviors.
   DelayedMultiDragGestureRecognizer({
-    this.delay: kLongPressTimeout,
+    this.delay = kLongPressTimeout,
     Object debugOwner,
   }) : assert(delay != null),
        super(debugOwner: debugOwner);

packages/flutter/lib/src/gestures/multitap.dart

@@ -316,7 +316,7 @@ class MultiTapGestureRecognizer extends GestureRecognizer {
   /// The [longTapDelay] defaults to [Duration.zero], which means
   /// [onLongTapDown] is called immediately after [onTapDown].
   MultiTapGestureRecognizer({
-    this.longTapDelay: Duration.zero,
+    this.longTapDelay = Duration.zero,
     Object debugOwner,
   }) : super(debugOwner: debugOwner);
 

packages/flutter/lib/src/gestures/pointer_router.dart

@@ -128,7 +128,7 @@ class FlutterErrorDetailsForPointerRouter extends FlutterErrorDetails {
     this.route,
     this.event,
     InformationCollector informationCollector,
-    bool silent: false
+    bool silent = false
   }) : super(
     exception: exception,
     stack: stack,

packages/flutter/lib/src/gestures/scale.dart

@@ -32,7 +32,7 @@ class ScaleStartDetails {
   /// Creates details for [GestureScaleStartCallback].
   ///
   /// The [focalPoint] argument must not be null.
-  ScaleStartDetails({ this.focalPoint: Offset.zero })
+  ScaleStartDetails({ this.focalPoint = Offset.zero })
     : assert(focalPoint != null);
 
   /// The initial focal point of the pointers in contact with the screen.
@@ -50,8 +50,8 @@ class ScaleUpdateDetails {
   /// The [focalPoint] and [scale] arguments must not be null. The [scale]
   /// argument must be greater than or equal to zero.
   ScaleUpdateDetails({
-    this.focalPoint: Offset.zero,
+    this.focalPoint = Offset.zero,
-    this.scale: 1.0,
+    this.scale = 1.0,
   }) : assert(focalPoint != null),
        assert(scale != null && scale >= 0.0);
 
@@ -72,7 +72,7 @@ class ScaleEndDetails {
   /// Creates details for [GestureScaleEndCallback].
   ///
   /// The [velocity] argument must not be null.
-  ScaleEndDetails({ this.velocity: Velocity.zero })
+  ScaleEndDetails({ this.velocity = Velocity.zero })
     : assert(velocity != null);
 
   /// The velocity of the last pointer to be lifted off of the screen.

packages/flutter/lib/src/gestures/tap.dart

@@ -14,7 +14,7 @@ class TapDownDetails {
   /// Creates details for a [GestureTapDownCallback].
   ///
   /// The [globalPosition] argument must not be null.
-  TapDownDetails({ this.globalPosition: Offset.zero })
+  TapDownDetails({ this.globalPosition = Offset.zero })
     : assert(globalPosition != null);
 
   /// The global position at which the pointer contacted the screen.
@@ -33,7 +33,7 @@ class TapUpDetails {
   /// Creates details for a [GestureTapUpCallback].
   ///
   /// The [globalPosition] argument must not be null.
-  TapUpDetails({ this.globalPosition: Offset.zero })
+  TapUpDetails({ this.globalPosition = Offset.zero })
     : assert(globalPosition != null);
 
   /// The global position at which the pointer contacted the screen.

packages/flutter/lib/src/material/about.dart

@@ -41,7 +41,7 @@ class AboutListTile extends StatelessWidget {
   /// values default to the empty string.
   const AboutListTile({
     Key key,
-    this.icon: const Icon(null),
+    this.icon = const Icon(null),
     this.child,
     this.applicationName,
     this.applicationVersion,

packages/flutter/lib/src/material/app.dart

@@ -83,26 +83,26 @@ class MaterialApp extends StatefulWidget {
     Key key,
     this.navigatorKey,
     this.home,
-    this.routes: const <String, WidgetBuilder>{},
+    this.routes = const <String, WidgetBuilder>{},
     this.initialRoute,
     this.onGenerateRoute,
     this.onUnknownRoute,
-    this.navigatorObservers: const <NavigatorObserver>[],
+    this.navigatorObservers = const <NavigatorObserver>[],
     this.builder,
-    this.title: '',
+    this.title = '',
     this.onGenerateTitle,
     this.color,
     this.theme,
     this.locale,
     this.localizationsDelegates,
     this.localeResolutionCallback,
-    this.supportedLocales: const <Locale>[const Locale('en', 'US')],
+    this.supportedLocales = const <Locale>[const Locale('en', 'US')],
-    this.debugShowMaterialGrid: false,
+    this.debugShowMaterialGrid = false,
-    this.showPerformanceOverlay: false,
+    this.showPerformanceOverlay = false,
-    this.checkerboardRasterCacheImages: false,
+    this.checkerboardRasterCacheImages = false,
-    this.checkerboardOffscreenLayers: false,
+    this.checkerboardOffscreenLayers = false,
-    this.showSemanticsDebugger: false,
+    this.showSemanticsDebugger = false,
-    this.debugShowCheckedModeBanner: true,
+    this.debugShowCheckedModeBanner = true,
   }) : assert(routes != null),
        assert(navigatorObservers != null),
        assert(

packages/flutter/lib/src/material/app_bar.dart

@@ -135,21 +135,21 @@ class AppBar extends StatefulWidget implements PreferredSizeWidget {
   AppBar({
     Key key,
     this.leading,
-    this.automaticallyImplyLeading: true,
+    this.automaticallyImplyLeading = true,
     this.title,
     this.actions,
     this.flexibleSpace,
     this.bottom,
-    this.elevation: 4.0,
+    this.elevation = 4.0,
     this.backgroundColor,
     this.brightness,
     this.iconTheme,
     this.textTheme,
-    this.primary: true,
+    this.primary = true,
     this.centerTitle,
-    this.titleSpacing: NavigationToolbar.kMiddleSpacing,
+    this.titleSpacing = NavigationToolbar.kMiddleSpacing,
-    this.toolbarOpacity: 1.0,
+    this.toolbarOpacity = 1.0,
-    this.bottomOpacity: 1.0,
+    this.bottomOpacity = 1.0,
   }) : assert(automaticallyImplyLeading != null),
        assert(elevation != null),
        assert(primary != null),
@@ -731,24 +731,24 @@ class SliverAppBar extends StatefulWidget {
   const SliverAppBar({
     Key key,
     this.leading,
-    this.automaticallyImplyLeading: true,
+    this.automaticallyImplyLeading = true,
     this.title,
     this.actions,
     this.flexibleSpace,
     this.bottom,
     this.elevation,
-    this.forceElevated: false,
+    this.forceElevated = false,
     this.backgroundColor,
     this.brightness,
     this.iconTheme,
     this.textTheme,
-    this.primary: true,
+    this.primary = true,
     this.centerTitle,
-    this.titleSpacing: NavigationToolbar.kMiddleSpacing,
+    this.titleSpacing = NavigationToolbar.kMiddleSpacing,
     this.expandedHeight,
-    this.floating: false,
+    this.floating = false,
-    this.pinned: false,
+    this.pinned = false,
-    this.snap: false,
+    this.snap = false,
   }) : assert(automaticallyImplyLeading != null),
        assert(forceElevated != null),
        assert(primary != null),

packages/flutter/lib/src/material/bottom_app_bar.dart

@@ -45,8 +45,8 @@ class BottomAppBar extends StatefulWidget {
   const BottomAppBar({
     Key key,
     this.color,
-    this.elevation: 8.0,
+    this.elevation = 8.0,
-    this.hasNotch: true,
+    this.hasNotch = true,
     this.child,
   }) : assert(elevation != null),
        assert(elevation >= 0.0),

packages/flutter/lib/src/material/bottom_navigation_bar.dart

@@ -88,10 +88,10 @@ class BottomNavigationBar extends StatefulWidget {
     Key key,
     @required this.items,
     this.onTap,
-    this.currentIndex: 0,
+    this.currentIndex = 0,
     BottomNavigationBarType type,
     this.fixedColor,
-    this.iconSize: 24.0,
+    this.iconSize = 24.0,
   }) : assert(items != null),
        assert(items.length >= 2),
        assert(0 <= currentIndex && currentIndex < items.length),
@@ -146,7 +146,7 @@ class _BottomNavigationTile extends StatelessWidget {
     this.onTap,
     this.colorTween,
     this.flex,
-    this.selected: false,
+    this.selected = false,
     this.indexLabel,
     }
   ): assert(selected != null);

packages/flutter/lib/src/material/button.dart

@@ -35,14 +35,14 @@ class RawMaterialButton extends StatefulWidget {
     this.fillColor,
     this.highlightColor,
     this.splashColor,
-    this.elevation: 2.0,
+    this.elevation = 2.0,
-    this.highlightElevation: 8.0,
+    this.highlightElevation = 8.0,
-    this.disabledElevation: 0.0,
+    this.disabledElevation = 0.0,
     this.outerPadding,
-    this.padding: EdgeInsets.zero,
+    this.padding = EdgeInsets.zero,
-    this.constraints: const BoxConstraints(minWidth: 88.0, minHeight: 36.0),
+    this.constraints = const BoxConstraints(minWidth: 88.0, minHeight: 36.0),
-    this.shape: const RoundedRectangleBorder(),
+    this.shape = const RoundedRectangleBorder(),
-    this.animationDuration: kThemeChangeDuration,
+    this.animationDuration = kThemeChangeDuration,
     this.child,
   }) : assert(shape != null),
        assert(elevation != null),

packages/flutter/lib/src/material/button_bar.dart

@@ -29,9 +29,9 @@ class ButtonBar extends StatelessWidget {
   /// The alignment argument defaults to [MainAxisAlignment.end].
   const ButtonBar({
     Key key,
-    this.alignment: MainAxisAlignment.end,
+    this.alignment = MainAxisAlignment.end,
-    this.mainAxisSize: MainAxisSize.max,
+    this.mainAxisSize = MainAxisSize.max,
-    this.children: const <Widget>[],
+    this.children = const <Widget>[],
   }) : super(key: key);
 
   /// How the children should be placed along the horizontal axis.

packages/flutter/lib/src/material/button_theme.dart

@@ -59,12 +59,12 @@ class ButtonTheme extends InheritedWidget {
   /// The [textTheme], [minWidth], and [height] arguments must not be null.
   ButtonTheme({
     Key key,
-    ButtonTextTheme textTheme: ButtonTextTheme.normal,
+    ButtonTextTheme textTheme = ButtonTextTheme.normal,
-    double minWidth: 88.0,
+    double minWidth = 88.0,
-    double height: 36.0,
+    double height = 36.0,
     EdgeInsetsGeometry padding,
     ShapeBorder shape,
-    bool alignedDropdown: false,
+    bool alignedDropdown = false,
     Widget child,
   }) : assert(textTheme != null),
        assert(minWidth != null && minWidth >= 0.0),
@@ -106,12 +106,12 @@ class ButtonTheme extends InheritedWidget {
   /// button theme.
   ButtonTheme.bar({
     Key key,
-    ButtonTextTheme textTheme: ButtonTextTheme.accent,
+    ButtonTextTheme textTheme = ButtonTextTheme.accent,
-    double minWidth: 64.0,
+    double minWidth = 64.0,
-    double height: 36.0,
+    double height = 36.0,
-    EdgeInsetsGeometry padding: const EdgeInsets.symmetric(horizontal: 8.0),
+    EdgeInsetsGeometry padding = const EdgeInsets.symmetric(horizontal: 8.0),
     ShapeBorder shape,
-    bool alignedDropdown: false,
+    bool alignedDropdown = false,
     Widget child,
   }) : assert(textTheme != null),
        assert(minWidth != null && minWidth >= 0.0),
@@ -157,12 +157,12 @@ class ButtonThemeData extends Diagnosticable {
   ///
   /// The [textTheme], [minWidth], and [height] parameters must not be null.
   const ButtonThemeData({
-    this.textTheme: ButtonTextTheme.normal,
+    this.textTheme = ButtonTextTheme.normal,
-    this.minWidth: 88.0,
+    this.minWidth = 88.0,
-    this.height: 36.0,
+    this.height = 36.0,
     EdgeInsetsGeometry padding,
     ShapeBorder shape,
-    this.alignedDropdown: false,
+    this.alignedDropdown = false,
   }) : assert(textTheme != null),
        assert(minWidth != null && minWidth >= 0.0),
        assert(height != null && height >= 0.0),

packages/flutter/lib/src/material/card.dart

@@ -65,7 +65,7 @@ class Card extends StatelessWidget {
     this.color,
     this.elevation,
     this.shape,
-    this.margin: const EdgeInsets.all(4.0),
+    this.margin = const EdgeInsets.all(4.0),
     this.child,
   }) : super(key: key);
 

packages/flutter/lib/src/material/checkbox.dart

@@ -55,7 +55,7 @@ class Checkbox extends StatefulWidget {
   const Checkbox({
     Key key,
     @required this.value,
-    this.tristate: false,
+    this.tristate = false,
     @required this.onChanged,
     this.activeColor,
   }) : assert(tristate != null),

packages/flutter/lib/src/material/checkbox_list_tile.dart

@@ -82,11 +82,11 @@ class CheckboxListTile extends StatelessWidget {
     this.activeColor,
     this.title,
     this.subtitle,
-    this.isThreeLine: false,
+    this.isThreeLine = false,
     this.dense,
     this.secondary,
-    this.selected: false,
+    this.selected = false,
-    this.controlAffinity: ListTileControlAffinity.platform,
+    this.controlAffinity = ListTileControlAffinity.platform,
   }) : assert(value != null),
        assert(isThreeLine != null),
        assert(!isThreeLine || subtitle != null),

packages/flutter/lib/src/material/chip.dart

@@ -533,8 +533,8 @@ class InputChip extends StatelessWidget
     @required this.label,
     this.labelStyle,
     this.labelPadding,
-    this.selected: false,
+    this.selected = false,
-    this.isEnabled: true,
+    this.isEnabled = true,
     this.onSelected,
     this.deleteIcon,
     this.onDeleted,
@@ -844,7 +844,7 @@ class FilterChip extends StatelessWidget
     @required this.label,
     this.labelStyle,
     this.labelPadding,
-    this.selected: false,
+    this.selected = false,
     @required this.onSelected,
     this.disabledColor,
     this.selectedColor,
@@ -1067,10 +1067,10 @@ class RawChip extends StatefulWidget
     this.deleteButtonTooltipMessage,
     this.onPressed,
     this.onSelected,
-    this.tapEnabled: true,
+    this.tapEnabled = true,
     this.selected,
-    this.showCheckmark: true,
+    this.showCheckmark = true,
-    this.isEnabled: true,
+    this.isEnabled = true,
     this.disabledColor,
     this.selectedColor,
     this.tooltip,

packages/flutter/lib/src/material/data_table.dart

@@ -36,7 +36,7 @@ class DataColumn {
   const DataColumn({
     @required this.label,
     this.tooltip,
-    this.numeric: false,
+    this.numeric = false,
     this.onSort,
   }) : assert(label != null);
 
@@ -87,7 +87,7 @@ class DataRow {
   /// The [cells] argument must not be null.
   const DataRow({
     this.key,
-    this.selected: false,
+    this.selected = false,
     this.onSelectChanged,
     @required this.cells,
   }) : assert(cells != null);
@@ -98,7 +98,7 @@ class DataRow {
   /// The [cells] argument must not be null.
   DataRow.byIndex({
     int index,
-    this.selected: false,
+    this.selected = false,
     this.onSelectChanged,
     @required this.cells,
   }) : assert(cells != null),
@@ -163,8 +163,8 @@ class DataCell {
   /// text should be provided instead, and then the [placeholder]
   /// argument should be set to true.
   const DataCell(this.child, {
-    this.placeholder: false,
+    this.placeholder = false,
-    this.showEditIcon: false,
+    this.showEditIcon = false,
     this.onTap,
   }) : assert(child != null);
 
@@ -259,7 +259,7 @@ class DataTable extends StatelessWidget {
     Key key,
     @required this.columns,
     this.sortColumnIndex,
-    this.sortAscending: true,
+    this.sortAscending = true,
     this.onSelectAll,
     @required this.rows,
   }) : assert(columns != null),

packages/flutter/lib/src/material/date_picker.dart

@@ -1044,7 +1044,7 @@ Future<DateTime> showDatePicker({
   @required DateTime firstDate,
   @required DateTime lastDate,
   SelectableDayPredicate selectableDayPredicate,
-  DatePickerMode initialDatePickerMode: DatePickerMode.day,
+  DatePickerMode initialDatePickerMode = DatePickerMode.day,
   Locale locale,
   TextDirection textDirection,
 }) async {

packages/flutter/lib/src/material/dialog.dart

@@ -39,8 +39,8 @@ class Dialog extends StatelessWidget {
   const Dialog({
     Key key,
     this.child,
-    this.insetAnimationDuration: const Duration(milliseconds: 100),
+    this.insetAnimationDuration = const Duration(milliseconds: 100),
-    this.insetAnimationCurve: Curves.decelerate,
+    this.insetAnimationCurve = Curves.decelerate,
   }) : super(key: key);
 
   /// The widget below this widget in the tree.
@@ -164,7 +164,7 @@ class AlertDialog extends StatelessWidget {
     this.title,
     this.titlePadding,
     this.content,
-    this.contentPadding: const EdgeInsets.fromLTRB(24.0, 20.0, 24.0, 24.0),
+    this.contentPadding = const EdgeInsets.fromLTRB(24.0, 20.0, 24.0, 24.0),
     this.actions,
     this.semanticLabel,
   }) : assert(contentPadding != null),
@@ -430,9 +430,9 @@ class SimpleDialog extends StatelessWidget {
   const SimpleDialog({
     Key key,
     this.title,
-    this.titlePadding: const EdgeInsets.fromLTRB(24.0, 24.0, 24.0, 0.0),
+    this.titlePadding = const EdgeInsets.fromLTRB(24.0, 24.0, 24.0, 0.0),
     this.children,
-    this.contentPadding: const EdgeInsets.fromLTRB(0.0, 12.0, 0.0, 16.0),
+    this.contentPadding = const EdgeInsets.fromLTRB(0.0, 12.0, 0.0, 16.0),
     this.semanticLabel,
   }) : assert(titlePadding != null),
        assert(contentPadding != null),
@@ -546,7 +546,7 @@ class SimpleDialog extends StatelessWidget {
 class _DialogRoute<T> extends PopupRoute<T> {
   _DialogRoute({
     @required this.theme,
-    bool barrierDismissible: true,
+    bool barrierDismissible = true,
     this.barrierLabel,
     @required this.child,
     RouteSettings settings,
@@ -630,7 +630,7 @@ class _DialogRoute<T> extends PopupRoute<T> {
 ///  * <https://material.google.com/components/dialogs.html>
 Future<T> showDialog<T>({
   @required BuildContext context,
-  bool barrierDismissible: true,
+  bool barrierDismissible = true,
   @Deprecated(
     'Instead of using the "child" argument, return the child from a closure '
     'provided to the "builder" argument. This will ensure that the BuildContext '

packages/flutter/lib/src/material/divider.dart

@@ -29,8 +29,8 @@ class Divider extends StatelessWidget {
   /// The height must be positive.
   const Divider({
     Key key,
-    this.height: 16.0,
+    this.height = 16.0,
-    this.indent: 0.0,
+    this.indent = 0.0,
     this.color
   }) : assert(height >= 0.0),
        super(key: key);
@@ -85,7 +85,7 @@ class Divider extends StatelessWidget {
   ///   // child: ...
   /// )
   /// ```
-  static BorderSide createBorderSide(BuildContext context, { Color color, double width: 0.0 }) {
+  static BorderSide createBorderSide(BuildContext context, { Color color, double width = 0.0 }) {
     assert(width != null);
     return new BorderSide(
       color: color ?? Theme.of(context).dividerColor,

packages/flutter/lib/src/material/drawer.dart

@@ -84,7 +84,7 @@ class Drawer extends StatelessWidget {
   /// Typically used in the [Scaffold.drawer] property.
   const Drawer({
     Key key,
-    this.elevation: 16.0,
+    this.elevation = 16.0,
     this.child,
     this.semanticLabel,
   }) : super(key: key);

packages/flutter/lib/src/material/drawer_header.dart

@@ -31,10 +31,10 @@ class DrawerHeader extends StatelessWidget {
   const DrawerHeader({
     Key key,
     this.decoration,
-    this.margin: const EdgeInsets.only(bottom: 8.0),
+    this.margin = const EdgeInsets.only(bottom: 8.0),
-    this.padding: const EdgeInsets.fromLTRB(16.0, 16.0, 16.0, 8.0),
+    this.padding = const EdgeInsets.fromLTRB(16.0, 16.0, 16.0, 8.0),
-    this.duration: const Duration(milliseconds: 250),
+    this.duration = const Duration(milliseconds: 250),
-    this.curve: Curves.fastOutSlowIn,
+    this.curve = Curves.fastOutSlowIn,
     @required this.child,
   }) : super(key: key);
 

packages/flutter/lib/src/material/dropdown.dart

@@ -288,7 +288,7 @@ class _DropdownRoute<T> extends PopupRoute<_DropdownRouteResult<T>> {
     this.padding,
     this.buttonRect,
     this.selectedIndex,
-    this.elevation: 8,
+    this.elevation = 8,
     this.theme,
     @required this.style,
     this.barrierLabel,
@@ -473,10 +473,10 @@ class DropdownButton<T> extends StatefulWidget {
     this.value,
     this.hint,
     @required this.onChanged,
-    this.elevation: 8,
+    this.elevation = 8,
     this.style,
-    this.iconSize: 24.0,
+    this.iconSize = 24.0,
-    this.isDense: false,
+    this.isDense = false,
   }) : assert(items != null),
        assert(value == null || items.where((DropdownMenuItem<T> item) => item.value == value).length == 1),
       super(key: key);

packages/flutter/lib/src/material/expand_icon.dart

@@ -22,10 +22,10 @@ class ExpandIcon extends StatefulWidget {
   /// triggered when the icon is pressed.
   const ExpandIcon({
     Key key,
-    this.isExpanded: false,
+    this.isExpanded = false,
-    this.size: 24.0,
+    this.size = 24.0,
     @required this.onPressed,
-    this.padding: const EdgeInsets.all(8.0)
+    this.padding = const EdgeInsets.all(8.0)
   }) : assert(isExpanded != null),
        assert(size != null),
        assert(padding != null),

packages/flutter/lib/src/material/expansion_panel.dart

@@ -67,7 +67,7 @@ class ExpansionPanel {
   ExpansionPanel({
     @required this.headerBuilder,
     @required this.body,
-    this.isExpanded: false
+    this.isExpanded = false
   }) : assert(headerBuilder != null),
        assert(body != null),
        assert(isExpanded != null);
@@ -98,9 +98,9 @@ class ExpansionPanelList extends StatelessWidget {
   /// triggered when an expansion panel expand/collapse button is pushed.
   const ExpansionPanelList({
     Key key,
-    this.children: const <ExpansionPanel>[],
+    this.children = const <ExpansionPanel>[],
     this.expansionCallback,
-    this.animationDuration: kThemeAnimationDuration
+    this.animationDuration = kThemeAnimationDuration
   }) : assert(children != null),
        assert(animationDuration != null),
        super(key: key);

packages/flutter/lib/src/material/expansion_tile.dart

@@ -37,9 +37,9 @@ class ExpansionTile extends StatefulWidget {
     @required this.title,
     this.backgroundColor,
     this.onExpansionChanged,
-    this.children: const <Widget>[],
+    this.children = const <Widget>[],
     this.trailing,
-    this.initiallyExpanded: false,
+    this.initiallyExpanded = false,
   }) : assert(initiallyExpanded != null),
        super(key: key);
 

packages/flutter/lib/src/material/floating_action_button.dart

@@ -70,14 +70,14 @@ class FloatingActionButton extends StatefulWidget {
     this.tooltip,
     this.foregroundColor,
     this.backgroundColor,
-    this.heroTag: const _DefaultHeroTag(),
+    this.heroTag = const _DefaultHeroTag(),
-    this.elevation: 6.0,
+    this.elevation = 6.0,
-    this.highlightElevation: 12.0,
+    this.highlightElevation = 12.0,
     @required this.onPressed,
-    this.mini: false,
+    this.mini = false,
-    this.notchMargin: 4.0,
+    this.notchMargin = 4.0,
-    this.shape: const CircleBorder(),
+    this.shape = const CircleBorder(),
-    this.isExtended: false,
+    this.isExtended = false,
   }) :  assert(elevation != null),
         assert(highlightElevation != null),
         assert(mini != null),
@@ -97,13 +97,13 @@ class FloatingActionButton extends StatefulWidget {
     this.tooltip,
     this.foregroundColor,
     this.backgroundColor,
-    this.heroTag: const _DefaultHeroTag(),
+    this.heroTag = const _DefaultHeroTag(),
-    this.elevation: 6.0,
+    this.elevation = 6.0,
-    this.highlightElevation: 12.0,
+    this.highlightElevation = 12.0,
     @required this.onPressed,
-    this.notchMargin: 4.0,
+    this.notchMargin = 4.0,
-    this.shape: const StadiumBorder(),
+    this.shape = const StadiumBorder(),
-    this.isExtended: true,
+    this.isExtended = true,
     @required Widget icon,
     @required Widget label,
   }) :  assert(elevation != null),

packages/flutter/lib/src/material/flutter_logo.dart

@@ -21,10 +21,10 @@ class FlutterLogo extends StatelessWidget {
     Key key,
     this.size,
     this.colors,
-    this.textColor: const Color(0xFF616161),
+    this.textColor = const Color(0xFF616161),
-    this.style: FlutterLogoStyle.markOnly,
+    this.style = FlutterLogoStyle.markOnly,
-    this.duration: const Duration(milliseconds: 750),
+    this.duration = const Duration(milliseconds: 750),
-    this.curve: Curves.fastOutSlowIn,
+    this.curve = Curves.fastOutSlowIn,
   }) : super(key: key);
 
   /// The size of the logo in logical pixels.

packages/flutter/lib/src/material/icon_button.dart

@@ -71,9 +71,9 @@ class IconButton extends StatelessWidget {
   /// or an [ImageIcon].
   const IconButton({
     Key key,
-    this.iconSize: 24.0,
+    this.iconSize = 24.0,
-    this.padding: const EdgeInsets.all(8.0),
+    this.padding = const EdgeInsets.all(8.0),
-    this.alignment: Alignment.center,
+    this.alignment = Alignment.center,
     @required this.icon,
     this.color,
     this.highlightColor,

packages/flutter/lib/src/material/ink_decoration.dart

@@ -148,10 +148,10 @@ class Ink extends StatefulWidget {
     @required ImageProvider image,
     ColorFilter colorFilter,
     BoxFit fit,
-    AlignmentGeometry alignment: Alignment.center,
+    AlignmentGeometry alignment = Alignment.center,
     Rect centerSlice,
-    ImageRepeat repeat: ImageRepeat.noRepeat,
+    ImageRepeat repeat = ImageRepeat.noRepeat,
-    bool matchTextDirection: false,
+    bool matchTextDirection = false,
     this.width,
     this.height,
     this.child,

packages/flutter/lib/src/material/ink_highlight.dart

@@ -39,7 +39,7 @@ class InkHighlight extends InteractiveInkFeature {
     @required MaterialInkController controller,
     @required RenderBox referenceBox,
     @required Color color,
-    BoxShape shape: BoxShape.rectangle,
+    BoxShape shape = BoxShape.rectangle,
     BorderRadius borderRadius,
     RectCallback rectCallback,
     VoidCallback onRemoved,

packages/flutter/lib/src/material/ink_ripple.dart

@@ -45,7 +45,7 @@ class _InkRippleFactory extends InteractiveInkFeatureFactory {
     @required RenderBox referenceBox,
     @required Offset position,
     @required Color color,
-    bool containedInkWell: false,
+    bool containedInkWell = false,
     RectCallback rectCallback,
     BorderRadius borderRadius,
     double radius,
@@ -112,7 +112,7 @@ class InkRipple extends InteractiveInkFeature {
     @required RenderBox referenceBox,
     @required Offset position,
     @required Color color,
-    bool containedInkWell: false,
+    bool containedInkWell = false,
     RectCallback rectCallback,
     BorderRadius borderRadius,
     double radius,

packages/flutter/lib/src/material/ink_splash.dart

@@ -51,7 +51,7 @@ class _InkSplashFactory extends InteractiveInkFeatureFactory {
     @required RenderBox referenceBox,
     @required Offset position,
     @required Color color,
-    bool containedInkWell: false,
+    bool containedInkWell = false,
     RectCallback rectCallback,
     BorderRadius borderRadius,
     double radius,
@@ -116,7 +116,7 @@ class InkSplash extends InteractiveInkFeature {
     @required RenderBox referenceBox,
     Offset position,
     Color color,
-    bool containedInkWell: false,
+    bool containedInkWell = false,
     RectCallback rectCallback,
     BorderRadius borderRadius,
     double radius,

packages/flutter/lib/src/material/ink_well.dart

@@ -92,7 +92,7 @@ abstract class InteractiveInkFeatureFactory {
     @required RenderBox referenceBox,
     @required Offset position,
     @required Color color,
-    bool containedInkWell: false,
+    bool containedInkWell = false,
     RectCallback rectCallback,
     BorderRadius borderRadius,
     double radius,
@@ -197,15 +197,15 @@ class InkResponse extends StatefulWidget {
     this.onDoubleTap,
     this.onLongPress,
     this.onHighlightChanged,
-    this.containedInkWell: false,
+    this.containedInkWell = false,
-    this.highlightShape: BoxShape.circle,
+    this.highlightShape = BoxShape.circle,
     this.radius,
     this.borderRadius,
     this.highlightColor,
     this.splashColor,
     this.splashFactory,
-    this.enableFeedback: true,
+    this.enableFeedback = true,
-    this.excludeFromSemantics: false,
+    this.excludeFromSemantics = false,
   }) : assert(containedInkWell != null),
        assert(highlightShape != null),
        assert(enableFeedback != null),
@@ -626,8 +626,8 @@ class InkWell extends InkResponse {
     InteractiveInkFeatureFactory splashFactory,
     double radius,
     BorderRadius borderRadius,
-    bool enableFeedback: true,
+    bool enableFeedback = true,
-    bool excludeFromSemantics: false,
+    bool excludeFromSemantics = false,
   }) : super(
     key: key,
     child: child,

packages/flutter/lib/src/material/input_border.dart

@@ -42,7 +42,7 @@ abstract class InputBorder extends ShapeBorder {
   /// substitutes its own, using [copyWith], based on the current theme and
   /// [InputDecorator.isFocused].
   const InputBorder({
-    this.borderSide: BorderSide.none,
+    this.borderSide = BorderSide.none,
   }) : assert(borderSide != null);
 
   /// Defines the border line's color and weight.
@@ -73,8 +73,8 @@ abstract class InputBorder extends ShapeBorder {
   @override
   void paint(Canvas canvas, Rect rect, {
       double gapStart,
-      double gapExtent: 0.0,
+      double gapExtent = 0.0,
-      double gapPercentage: 0.0,
+      double gapPercentage = 0.0,
       TextDirection textDirection,
   });
 }
@@ -108,8 +108,8 @@ class _NoInputBorder extends InputBorder {
   @override
   void paint(Canvas canvas, Rect rect, {
       double gapStart,
-      double gapExtent: 0.0,
+      double gapExtent = 0.0,
-      double gapPercentage: 0.0,
+      double gapPercentage = 0.0,
       TextDirection textDirection,
   }) {
     // Do not paint.
@@ -139,8 +139,8 @@ class UnderlineInputBorder extends InputBorder {
   /// and right corners have a circular radius of 4.0. The [borderRadius]
   /// parameter must not be null.
   const UnderlineInputBorder({
-    BorderSide borderSide: BorderSide.none,
+    BorderSide borderSide = BorderSide.none,
-    this.borderRadius: const BorderRadius.only(
+    this.borderRadius = const BorderRadius.only(
       topLeft: const Radius.circular(4.0),
       topRight: const Radius.circular(4.0),
     ),
@@ -217,8 +217,8 @@ class UnderlineInputBorder extends InputBorder {
   @override
   void paint(Canvas canvas, Rect rect, {
       double gapStart,
-      double gapExtent: 0.0,
+      double gapExtent = 0.0,
-      double gapPercentage: 0.0,
+      double gapPercentage = 0.0,
       TextDirection textDirection,
   }) {
     if (borderRadius.bottomLeft != Radius.zero || borderRadius.bottomRight != Radius.zero)
@@ -266,9 +266,9 @@ class OutlineInputBorder extends InputBorder {
   /// must not be null and the corner radii must be circular, i.e. their
   /// [Radius.x] and [Radius.y] values must be the same.
   const OutlineInputBorder({
-    BorderSide borderSide: BorderSide.none,
+    BorderSide borderSide = BorderSide.none,
-    this.borderRadius: const BorderRadius.all(const Radius.circular(4.0)),
+    this.borderRadius = const BorderRadius.all(const Radius.circular(4.0)),
-    this.gapPadding: 4.0,
+    this.gapPadding = 4.0,
   }) : assert(borderRadius != null),
        assert(gapPadding != null && gapPadding >= 0.0),
        super(borderSide: borderSide);
@@ -437,8 +437,8 @@ class OutlineInputBorder extends InputBorder {
   @override
   void paint(Canvas canvas, Rect rect, {
       double gapStart,
-      double gapExtent: 0.0,
+      double gapExtent = 0.0,
-      double gapPercentage: 0.0,
+      double gapPercentage = 0.0,
       TextDirection textDirection,
   }) {
     assert(gapExtent != null);

packages/flutter/lib/src/material/input_decorator.dart

@@ -1344,8 +1344,8 @@ class InputDecorator extends StatefulWidget {
     this.decoration,
     this.baseStyle,
     this.textAlign,
-    this.isFocused: false,
+    this.isFocused = false,
-    this.isEmpty: false,
+    this.isEmpty = false,
     this.child,
   }) : assert(isFocused != null),
        assert(isEmpty != null),
@@ -1827,7 +1827,7 @@ class InputDecoration {
     this.filled,
     this.fillColor,
     this.border,
-    this.enabled: true,
+    this.enabled = true,
   }) : assert(enabled != null), isCollapsed = false;
 
   /// Defines an [InputDecorator] that is the same size as the input field.
@@ -1838,10 +1838,10 @@ class InputDecoration {
   const InputDecoration.collapsed({
     @required this.hintText,
     this.hintStyle,
-    this.filled: false,
+    this.filled = false,
     this.fillColor,
-    this.border: InputBorder.none,
+    this.border = InputBorder.none,
-    this.enabled: true,
+    this.enabled = true,
   }) : assert(enabled != null),
        icon = null,
        labelText = null,
@@ -2322,15 +2322,15 @@ class InputDecorationTheme extends Diagnosticable {
     this.hintStyle,
     this.errorStyle,
     this.errorMaxLines,
-    this.isDense: false,
+    this.isDense = false,
     this.contentPadding,
-    this.isCollapsed: false,
+    this.isCollapsed = false,
     this.prefixStyle,
     this.suffixStyle,
     this.counterStyle,
-    this.filled: false,
+    this.filled = false,
     this.fillColor,
-    this.border: const UnderlineInputBorder(),
+    this.border = const UnderlineInputBorder(),
   }) : assert(isDense != null),
        assert(isCollapsed != null),
        assert(filled != null),

packages/flutter/lib/src/material/list_tile.dart

@@ -41,8 +41,8 @@ class ListTileTheme extends InheritedWidget {
   /// [ListTile]s.
   const ListTileTheme({
     Key key,
-    this.dense: false,
+    this.dense = false,
-    this.style: ListTileStyle.list,
+    this.style = ListTileStyle.list,
     this.selectedColor,
     this.iconColor,
     this.textColor,
@@ -222,13 +222,13 @@ class ListTile extends StatelessWidget {
     this.title,
     this.subtitle,
     this.trailing,
-    this.isThreeLine: false,
+    this.isThreeLine = false,
     this.dense,
     this.contentPadding,
-    this.enabled: true,
+    this.enabled = true,
     this.onTap,
     this.onLongPress,
-    this.selected: false,
+    this.selected = false,
   }) : assert(isThreeLine != null),
        assert(enabled != null),
        assert(selected != null),

packages/flutter/lib/src/material/material.dart

@@ -164,14 +164,14 @@ class Material extends StatefulWidget {
   /// catch likely errors.
   const Material({
     Key key,
-    this.type: MaterialType.canvas,
+    this.type = MaterialType.canvas,
-    this.elevation: 0.0,
+    this.elevation = 0.0,
     this.color,
-    this.shadowColor: const Color(0xFF000000),
+    this.shadowColor = const Color(0xFF000000),
     this.textStyle,
     this.borderRadius,
     this.shape,
-    this.animationDuration: kThemeChangeDuration,
+    this.animationDuration = kThemeChangeDuration,
     this.child,
   }) : assert(type != null),
        assert(elevation != null),
@@ -585,7 +585,7 @@ class _MaterialInterior extends ImplicitlyAnimatedWidget {
     @required this.elevation,
     @required this.color,
     @required this.shadowColor,
-    Curve curve: Curves.linear,
+    Curve curve = Curves.linear,
     @required Duration duration,
   }) : assert(child != null),
        assert(shape != null),

packages/flutter/lib/src/material/material_localizations.dart

@@ -168,7 +168,7 @@ abstract class MaterialLocalizations {
   ///
   /// The documentation for [TimeOfDayFormat] enum values provides details on
   /// each supported layout.
-  TimeOfDayFormat timeOfDayFormat({ bool alwaysUse24HourFormat: false });
+  TimeOfDayFormat timeOfDayFormat({ bool alwaysUse24HourFormat = false });
 
   /// Provides geometric text preferences for the current locale.
   ///
@@ -196,7 +196,7 @@ abstract class MaterialLocalizations {
   ///
   /// If [alwaysUse24HourFormat] is true, formats hour using [HourFormat.HH]
   /// rather than the default for the current locale.
-  String formatHour(TimeOfDay timeOfDay, { bool alwaysUse24HourFormat: false });
+  String formatHour(TimeOfDay timeOfDay, { bool alwaysUse24HourFormat = false });
 
   /// Formats [TimeOfDay.minute] in the given time of day according to the value
   /// of [timeOfDayFormat].
@@ -208,7 +208,7 @@ abstract class MaterialLocalizations {
   /// rather than the default for the current locale. This value is usually
   /// passed from [MediaQueryData.alwaysUse24HourFormat], which has platform-
   /// specific behavior.
-  String formatTimeOfDay(TimeOfDay timeOfDay, { bool alwaysUse24HourFormat: false });
+  String formatTimeOfDay(TimeOfDay timeOfDay, { bool alwaysUse24HourFormat = false });
 
   /// Full unabbreviated year format, e.g. 2017 rather than 17.
   String formatYear(DateTime date);
@@ -388,7 +388,7 @@ class DefaultMaterialLocalizations implements MaterialLocalizations {
   ];
 
   @override
-  String formatHour(TimeOfDay timeOfDay, { bool alwaysUse24HourFormat: false }) {
+  String formatHour(TimeOfDay timeOfDay, { bool alwaysUse24HourFormat = false }) {
     final TimeOfDayFormat format = timeOfDayFormat(alwaysUse24HourFormat: alwaysUse24HourFormat);
     switch (format) {
       case TimeOfDayFormat.h_colon_mm_space_a:
@@ -473,7 +473,7 @@ class DefaultMaterialLocalizations implements MaterialLocalizations {
   }
 
   @override
-  String formatTimeOfDay(TimeOfDay timeOfDay, { bool alwaysUse24HourFormat: false }) {
+  String formatTimeOfDay(TimeOfDay timeOfDay, { bool alwaysUse24HourFormat = false }) {
     // Not using intl.DateFormat for two reasons:
     //
     // - DateFormat supports more formats than our material time picker does,
@@ -622,7 +622,7 @@ class DefaultMaterialLocalizations implements MaterialLocalizations {
   String get modalBarrierDismissLabel => 'Dismiss';
 
   @override
-  TimeOfDayFormat timeOfDayFormat({ bool alwaysUse24HourFormat: false }) {
+  TimeOfDayFormat timeOfDayFormat({ bool alwaysUse24HourFormat = false }) {
     return alwaysUse24HourFormat
       ? TimeOfDayFormat.HH_colon_mm
       : TimeOfDayFormat.h_colon_mm_space_a;