Enable extension types in package:web and dart:js_interop

This uses the allowed_experiments.json to opt package:web and
dart:js_interop in to the inline-class experiment (the extension
types feature) for early access and development.

Change-Id: Ieb828b654f2320b147a3c48bbb4a142da1c18380
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/332421
Reviewed-by: Srujan Gaddam <srujzs@google.com>
Reviewed-by: William Hesse <whesse@google.com>
Commit-Queue: Johnni Winther <johnniwinther@google.com>
Reviewed-by: Konstantin Shcheglov <scheglov@google.com>

pkg/_fe_analyzer_shared/lib/src/experiments/flags.dart

@@ -85,7 +85,7 @@ enum ExperimentalFlag {
       isEnabledByDefault: false,
       isExpired: false,
       experimentEnabledVersion: defaultLanguageVersion,
-      experimentReleasedVersion: defaultLanguageVersion),
+      experimentReleasedVersion: const Version(3, 3)),
 
   macros(
       name: 'macros',

pkg/analyzer/lib/src/dart/analysis/driver.dart

@@ -86,7 +86,7 @@ import 'package:analyzer/src/utilities/uri_cache.dart';
 /// TODO(scheglov) Clean up the list of implicitly analyzed files.
 class AnalysisDriver implements AnalysisDriverGeneric {
   /// The version of data format, should be incremented on every format change.
-  static const int DATA_VERSION = 314;
+  static const int DATA_VERSION = 315;
 
   /// The number of exception contexts allowed to write. Once this field is
   /// zero, we stop writing any new exception contexts in this process.

pkg/analyzer/lib/src/dart/analysis/experiments.g.dart

@@ -240,7 +240,7 @@ class ExperimentalFeatures {
     isEnabledByDefault: IsEnabledByDefault.inline_class,
     isExpired: IsExpired.inline_class,
     documentation: 'Extension Types',
-    experimentalReleaseVersion: null,
+    experimentalReleaseVersion: Version.parse('3.3.0'),
     releaseVersion: null,
   );
 

pkg/front_end/lib/src/api_prototype/experimental_flags_generated.dart

@@ -145,7 +145,7 @@ class ExperimentalFlag {
       isExpired: false,
       enabledVersion: defaultLanguageVersion,
       experimentEnabledVersion: defaultLanguageVersion,
-      experimentReleasedVersion: defaultLanguageVersion);
+      experimentReleasedVersion: const Version(3, 3));
 
   static const ExperimentalFlag macros = const ExperimentalFlag(
       name: 'macros',
@@ -751,7 +751,11 @@ const AllowedExperimentalFlags defaultAllowedExperimentalFlags =
   ExperimentalFlag.records,
   ExperimentalFlag.classModifiers,
   ExperimentalFlag.sealedClass,
-}, sdkLibraryExperiments: {}, packageExperiments: {
+}, sdkLibraryExperiments: {
+  "js_interop": {
+    ExperimentalFlag.inlineClass,
+  },
+}, packageExperiments: {
   "async": {
     ExperimentalFlag.nonNullable,
   },
@@ -932,6 +936,9 @@ const AllowedExperimentalFlags defaultAllowedExperimentalFlags =
   "video_player_web": {
     ExperimentalFlag.nonNullable,
   },
+  "web": {
+    ExperimentalFlag.inlineClass,
+  },
 });
 const Map<shared.ExperimentalFlag, ExperimentalFlag> sharedExperimentalFlags = {
   shared.ExperimentalFlag.classModifiers: ExperimentalFlag.classModifiers,

sdk/lib/_internal/allowed_experiments.json

@@ -8,12 +8,20 @@
     ],
     "nullSafety": [
       "non-nullable"
+    ],
+    "extensionTypes": [
+      "inline-class"
     ]
   },
   "sdk": {
     "default": {
       "experimentSet": "sdkExperiments"
     },
+    "libraries": {
+      "js_interop": {
+        "experimentSet": "extensionTypes"
+      }
+    },
     "_example_libraries": {
       "ui": {
         "experimentSet": "nullSafety"
@@ -200,6 +208,9 @@
     },
     "video_player_web": {
       "experimentSet": "nullSafety"
+    },
+    "web": {
+      "experimentSet": "extensionTypes"
     }
   }
 }

tools/experimental_features.yaml

@@ -122,6 +122,7 @@ features:
     help: "Static meta-programming"
 
   inline-class:
+    experimentalReleaseVersion: '3.3.0'
     help: "Extension Types"
 
   native-assets: