Update experimental_features.yaml, set experimentalReleaseVersion for non-nullable.

Bug: #43032
Change-Id: I28b27b3416826abd807a185b2d4214782571fb98
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/159383
Commit-Queue: Konstantin Shcheglov <[email protected]>
Reviewed-by: Paul Berry <[email protected]>
Reviewed-by: Jake Macdonald <[email protected]>

Author: scheglov

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

@@ -97,7 +97,7 @@ class ExperimentalFeatures {
     isEnabledByDefault: IsEnabledByDefault.non_nullable,
     isExpired: IsExpired.non_nullable,
     documentation: 'Non Nullable by default',
-    experimentalReleaseVersion: null,
+    experimentalReleaseVersion: Version.parse('2.10.0'),
     releaseVersion: null,
   );
 

pkg/analyzer/tool/experiments/generate.dart

@@ -144,6 +144,8 @@ class ExperimentalFeatures {
     for (var key in keysSorted) {
       var id = keyToIdentifier(key);
       var help = (features[key] as YamlMap)['help'] ?? '';
+      var experimentalReleaseVersion =
+          (features[key] as YamlMap)['experimentalReleaseVersion'];
       var enabledIn = (features[key] as YamlMap)['enabledIn'];
       out.write('''
 
@@ -154,7 +156,16 @@ class ExperimentalFeatures {
         isExpired: IsExpired.$id,
         documentation: '$help',
     ''');
-      out.write("experimentalReleaseVersion: null,");
+
+      if (experimentalReleaseVersion != null) {
+        experimentalReleaseVersion =
+            _versionNumberAsString(experimentalReleaseVersion);
+        out.write("experimentalReleaseVersion: ");
+        out.write("Version.parse('$experimentalReleaseVersion'),");
+      } else {
+        out.write("experimentalReleaseVersion: null,");
+      }
+
       if (enabledIn != null) {
         enabledIn = _versionNumberAsString(enabledIn);
         out.write("releaseVersion: Version.parse('$enabledIn'),");

pkg/dev_compiler/tool/patch_sdk.dart

@@ -475,7 +475,7 @@ class _StringEdit implements Comparable<_StringEdit> {
 
 ParseStringResult _parseString(String source, {bool useNnbd}) {
   var features = FeatureSet.fromEnableFlags2(
-    sdkLanguageVersion: Version.parse('2.9.0'),
+    sdkLanguageVersion: Version.parse('2.10.0'),
     flags: [if (useNnbd) 'non-nullable'],
   );
   return parseString(content: source, featureSet: features);

tools/experimental_features.yaml

@@ -90,6 +90,7 @@ current-version: '2.10.0'
 features:
   non-nullable:
     help: "Non Nullable by default"
+    experimentalReleaseVersion: '2.10.0'
 
   triple-shift:
     help: "Triple-shift operator"