Add "named-arguments-anywhere" experiment flag

Part of https://github.com/dart-lang/sdk/issues/47451

Change-Id: I049519061d132eb681cc3aa67b1dea5d296e540e
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/216801
Commit-Queue: Chloe Stefantsova <dmitryas@google.com>
Reviewed-by: Johnni Winther <johnniwinther@google.com>

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

@@ -21,6 +21,8 @@ final _knownFeatures = <String, ExperimentalFeature>{
   EnableString.extension_methods: ExperimentalFeatures.extension_methods,
   EnableString.extension_types: ExperimentalFeatures.extension_types,
   EnableString.generic_metadata: ExperimentalFeatures.generic_metadata,
+  EnableString.named_arguments_anywhere:
+      ExperimentalFeatures.named_arguments_anywhere,
   EnableString.non_nullable: ExperimentalFeatures.non_nullable,
   EnableString.nonfunction_type_aliases:
       ExperimentalFeatures.nonfunction_type_aliases,
@@ -59,6 +61,9 @@ class EnableString {
   /// String to enable the experiment "generic-metadata"
   static const String generic_metadata = 'generic-metadata';
 
+  /// String to enable the experiment "named-arguments-anywhere"
+  static const String named_arguments_anywhere = 'named-arguments-anywhere';
+
   /// String to enable the experiment "non-nullable"
   static const String non_nullable = 'non-nullable';
 
@@ -168,8 +173,18 @@ class ExperimentalFeatures {
     releaseVersion: Version.parse('2.14.0'),
   );
 
-  static final non_nullable = ExperimentalFeature(
+  static final named_arguments_anywhere = ExperimentalFeature(
     index: 8,
+    enableString: EnableString.named_arguments_anywhere,
+    isEnabledByDefault: IsEnabledByDefault.named_arguments_anywhere,
+    isExpired: IsExpired.named_arguments_anywhere,
+    documentation: 'Named Arguments Anywhere',
+    experimentalReleaseVersion: null,
+    releaseVersion: null,
+  );
+
+  static final non_nullable = ExperimentalFeature(
+    index: 9,
     enableString: EnableString.non_nullable,
     isEnabledByDefault: IsEnabledByDefault.non_nullable,
     isExpired: IsExpired.non_nullable,
@@ -179,7 +194,7 @@ class ExperimentalFeatures {
   );
 
   static final nonfunction_type_aliases = ExperimentalFeature(
-    index: 9,
+    index: 10,
     enableString: EnableString.nonfunction_type_aliases,
     isEnabledByDefault: IsEnabledByDefault.nonfunction_type_aliases,
     isExpired: IsExpired.nonfunction_type_aliases,
@@ -189,7 +204,7 @@ class ExperimentalFeatures {
   );
 
   static final set_literals = ExperimentalFeature(
-    index: 10,
+    index: 11,
     enableString: EnableString.set_literals,
     isEnabledByDefault: IsEnabledByDefault.set_literals,
     isExpired: IsExpired.set_literals,
@@ -199,7 +214,7 @@ class ExperimentalFeatures {
   );
 
   static final spread_collections = ExperimentalFeature(
-    index: 11,
+    index: 12,
     enableString: EnableString.spread_collections,
     isEnabledByDefault: IsEnabledByDefault.spread_collections,
     isExpired: IsExpired.spread_collections,
@@ -209,7 +224,7 @@ class ExperimentalFeatures {
   );
 
   static final test_experiment = ExperimentalFeature(
-    index: 12,
+    index: 13,
     enableString: EnableString.test_experiment,
     isEnabledByDefault: IsEnabledByDefault.test_experiment,
     isExpired: IsExpired.test_experiment,
@@ -220,7 +235,7 @@ class ExperimentalFeatures {
   );
 
   static final triple_shift = ExperimentalFeature(
-    index: 13,
+    index: 14,
     enableString: EnableString.triple_shift,
     isEnabledByDefault: IsEnabledByDefault.triple_shift,
     isExpired: IsExpired.triple_shift,
@@ -230,7 +245,7 @@ class ExperimentalFeatures {
   );
 
   static final value_class = ExperimentalFeature(
-    index: 14,
+    index: 15,
     enableString: EnableString.value_class,
     isEnabledByDefault: IsEnabledByDefault.value_class,
     isExpired: IsExpired.value_class,
@@ -240,7 +255,7 @@ class ExperimentalFeatures {
   );
 
   static final variance = ExperimentalFeature(
-    index: 15,
+    index: 16,
     enableString: EnableString.variance,
     isEnabledByDefault: IsEnabledByDefault.variance,
     isExpired: IsExpired.variance,
@@ -277,6 +292,9 @@ class IsEnabledByDefault {
   /// Default state of the experiment "generic-metadata"
   static const bool generic_metadata = true;
 
+  /// Default state of the experiment "named-arguments-anywhere"
+  static const bool named_arguments_anywhere = false;
+
   /// Default state of the experiment "non-nullable"
   static const bool non_nullable = true;
 
@@ -330,6 +348,9 @@ class IsExpired {
   /// Expiration status of the experiment "generic-metadata"
   static const bool generic_metadata = false;
 
+  /// Expiration status of the experiment "named-arguments-anywhere"
+  static const bool named_arguments_anywhere = false;
+
   /// Expiration status of the experiment "non-nullable"
   static const bool non_nullable = false;
 
@@ -384,6 +405,10 @@ mixin _CurrentState {
   /// Current state for the flag "generic-metadata"
   bool get generic_metadata => isEnabled(ExperimentalFeatures.generic_metadata);
 
+  /// Current state for the flag "named-arguments-anywhere"
+  bool get named_arguments_anywhere =>
+      isEnabled(ExperimentalFeatures.named_arguments_anywhere);
+
   /// Current state for the flag "non-nullable"
   bool get non_nullable => isEnabled(ExperimentalFeatures.non_nullable);
 

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

@@ -19,6 +19,7 @@ enum ExperimentalFlag {
   extensionMethods,
   extensionTypes,
   genericMetadata,
+  namedArgumentsAnywhere,
   nonNullable,
   nonfunctionTypeAliases,
   setLiterals,
@@ -39,6 +40,7 @@ const Version enableEnhancedEnumsVersion = const Version(2, 15);
 const Version enableExtensionMethodsVersion = const Version(2, 6);
 const Version enableExtensionTypesVersion = const Version(2, 15);
 const Version enableGenericMetadataVersion = const Version(2, 14);
+const Version enableNamedArgumentsAnywhereVersion = const Version(2, 15);
 const Version enableNonNullableVersion = const Version(2, 12);
 const Version enableNonfunctionTypeAliasesVersion = const Version(2, 13);
 const Version enableSetLiteralsVersion = const Version(2, 0);
@@ -68,6 +70,8 @@ ExperimentalFlag? parseExperimentalFlag(String flag) {
       return ExperimentalFlag.extensionTypes;
     case "generic-metadata":
       return ExperimentalFlag.genericMetadata;
+    case "named-arguments-anywhere":
+      return ExperimentalFlag.namedArgumentsAnywhere;
     case "non-nullable":
       return ExperimentalFlag.nonNullable;
     case "nonfunction-type-aliases":
@@ -98,6 +102,7 @@ const Map<ExperimentalFlag, bool> defaultExperimentalFlags = {
   ExperimentalFlag.extensionMethods: true,
   ExperimentalFlag.extensionTypes: false,
   ExperimentalFlag.genericMetadata: true,
+  ExperimentalFlag.namedArgumentsAnywhere: false,
   ExperimentalFlag.nonNullable: true,
   ExperimentalFlag.nonfunctionTypeAliases: true,
   ExperimentalFlag.setLiterals: true,
@@ -118,6 +123,7 @@ const Map<ExperimentalFlag, bool> expiredExperimentalFlags = {
   ExperimentalFlag.extensionMethods: false,
   ExperimentalFlag.extensionTypes: false,
   ExperimentalFlag.genericMetadata: false,
+  ExperimentalFlag.namedArgumentsAnywhere: false,
   ExperimentalFlag.nonNullable: false,
   ExperimentalFlag.nonfunctionTypeAliases: false,
   ExperimentalFlag.setLiterals: true,
@@ -138,6 +144,7 @@ const Map<ExperimentalFlag, Version> experimentEnabledVersion = {
   ExperimentalFlag.extensionMethods: const Version(2, 6),
   ExperimentalFlag.extensionTypes: const Version(2, 15),
   ExperimentalFlag.genericMetadata: const Version(2, 14),
+  ExperimentalFlag.namedArgumentsAnywhere: const Version(2, 15),
   ExperimentalFlag.nonNullable: const Version(2, 12),
   ExperimentalFlag.nonfunctionTypeAliases: const Version(2, 13),
   ExperimentalFlag.setLiterals: const Version(2, 0),
@@ -158,6 +165,7 @@ const Map<ExperimentalFlag, Version> experimentReleasedVersion = {
   ExperimentalFlag.extensionMethods: const Version(2, 6),
   ExperimentalFlag.extensionTypes: const Version(2, 15),
   ExperimentalFlag.genericMetadata: const Version(2, 14),
+  ExperimentalFlag.namedArgumentsAnywhere: const Version(2, 15),
   ExperimentalFlag.nonNullable: const Version(2, 10),
   ExperimentalFlag.nonfunctionTypeAliases: const Version(2, 13),
   ExperimentalFlag.setLiterals: const Version(2, 0),

tools/experimental_features.yaml

@@ -125,6 +125,9 @@ features:
   enhanced-enums:
     help: "Enhanced Enums"
 
+  named-arguments-anywhere:
+    help: "Named Arguments Anywhere"
+
 # Experiment flag only used for testing.
   test-experiment:
     help: >-