Elements. Remove Fragment.name/nameOffset, use name2 instead.

Change-Id: I36ab124af49c0bd8b85c8ede9c3918dbfdc518a2
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/390812
Commit-Queue: Konstantin Shcheglov <scheglov@google.com>
Reviewed-by: Phil Quitslund <pquitslund@google.com>

pkg/analysis_server/lib/src/lsp/handlers/code_lens/abstract_code_lens_provider.dart

@@ -33,9 +33,9 @@ abstract class AbstractCodeLensProvider
   /// If for any reason the location cannot be computed, returns `null`.
   Location? getLocation(Fragment fragment) {
     // We can't produce a location to a name if there isn't one.
-    var nameOffset = fragment.nameOffset;
+    var nameOffset = fragment.name2?.nameOffset;
     var nameLength = fragment.element.displayName.length;
-    if (nameOffset == null || nameOffset == -1) {
+    if (nameOffset == null) {
       return null;
     }
 

pkg/analysis_server/lib/src/lsp/handlers/code_lens/augmentations.dart

@@ -72,9 +72,9 @@ class AugmentationCodeLensProvider extends AbstractCodeLensProvider {
     ) {
       var command =
           getNavigationCommand(clientCapabilities, title, targetFragment);
-      var nameOffset = thisFragment.nameOffset;
+      var nameOffset = thisFragment.name2?.nameOffset;
       var nameLength = thisFragment.element.displayName.length;
-      if (command != null && nameOffset != null && nameOffset != -1) {
+      if (command != null && nameOffset != null) {
         var range = toRange(
           result.lineInfo,
           nameOffset,

pkg/analysis_server/lib/src/protocol_server.dart

@@ -271,8 +271,8 @@ Location? newLocation_fromElement2(engine.Element2? element) {
     if (fragment == null) {
       return null;
     }
-    var offset = fragment.nameOffset ?? 0;
-    var length = fragment.name?.length ?? 0;
+    var offset = fragment.name2?.nameOffset ?? 0;
+    var length = fragment.name2?.name.length ?? 0;
     var range = engine.SourceRange(offset, length);
     return _locationForArgs2(fragment, range);
   } else if (element is engine.LocalFunctionElement) {

pkg/analysis_server/lib/src/services/correction/dart/add_field_formal_parameters.dart

@@ -43,8 +43,9 @@ class AddFieldFormalParameters extends ResolvedCorrectionProducer {
     // Compute uninitialized final fields.
     var fields = ErrorVerifier.computeNotInitializedFields2(constructor);
     fields.retainWhere((FieldElement2 field) => field.isFinal);
-    fields.sort(
-        (a, b) => a.firstFragment!.nameOffset! - b.firstFragment!.nameOffset!);
+    fields.sort((a, b) =>
+        a.firstFragment!.name2!.nameOffset -
+        b.firstFragment!.name2!.nameOffset);
 
     // Specialize for Flutter widgets.
     if (superType.isExactlyStatelessWidgetType ||

pkg/analysis_server/lib/src/services/correction/dart/replace_return_type.dart

@@ -88,28 +88,33 @@ class ReplaceReturnType extends ResolvedCorrectionProducer {
 
   bool _isCompatibleWithReturnType(
       MethodDeclaration method, DartType? newType) {
-    if (newType != null) {
-      var clazz = method.thisOrAncestorOfType<ClassDeclaration>();
-      if (clazz != null) {
-        var classElement = clazz.declaredFragment!.element;
-        var overriddenList = InheritanceManager3().getOverridden4(
-            classElement,
-            Name.forLibrary(
-              classElement.library2,
-              method.declaredFragment!.name!,
-            ));
-
-        if (overriddenList != null) {
-          var notSubtype = overriddenList.any((element) => !libraryElement2
-              .typeSystem
-              .isSubtypeOf(newType, element.returnType));
-          if (notSubtype) {
-            return false;
-          }
-        }
+    if (newType == null) {
+      return false;
+    }
+
+    var clazz = method.thisOrAncestorOfType<ClassDeclaration>();
+    if (clazz == null) {
+      return false;
+    }
+
+    var methodName = method.declaredFragment!.name2;
+    if (methodName == null) {
+      return false;
+    }
+
+    var classElement = clazz.declaredFragment!.element;
+    var overriddenList = InheritanceManager3().getOverridden4(
+      classElement,
+      Name.forLibrary(classElement.library2, methodName.name),
+    );
+
+    if (overriddenList != null) {
+      var notSubtype = overriddenList.any((element) =>
+          !libraryElement2.typeSystem.isSubtypeOf(newType, element.returnType));
+      if (notSubtype) {
+        return false;
       }
-      return true;
     }
-    return false;
+    return true;
   }
 }

pkg/analyzer/lib/dart/element/element2.dart

@@ -859,11 +859,6 @@ abstract class Fragment {
   /// This will be the fragment itself if it is a library fragment.
   LibraryFragment get libraryFragment;
 
-  /// The name of this fragment.
-  ///
-  /// Returns `null` if this fragment doesn't have a name.
-  String? get name;
-
   /// The name of this fragment.
   ///
   /// Returns `null` if the fragment does not have a name, e.g. an unnamed
@@ -876,11 +871,6 @@ abstract class Fragment {
   /// specified, and the parser inserted a synthetic identifier.
   FragmentName? get name2;
 
-  /// The offset of the name in this fragment.
-  ///
-  /// Returns `null` if the fragment has no name.
-  int? get nameOffset;
-
   /// The next fragment in the augmentation chain.
   ///
   /// Returns `null` if this is the last fragment in the chain.
@@ -1017,9 +1007,6 @@ abstract class GetterFragment implements ExecutableFragment {
   // @override
   // GetterElement get element;
 
-  @override
-  String? get name;
-
   /// The field or top-level variable associated with this getter.
   ///
   /// If this getter was explicitly defined (is not synthetic) then the variable
@@ -1185,9 +1172,6 @@ abstract class InterfaceFragment implements InstanceFragment {
   /// [MixinFragment] cannot have mixins, so the empty list is returned.
   List<InterfaceType> get mixins;
 
-  @override
-  String get name;
-
   /// The superclass declared by this fragment.
   InterfaceType? get supertype;
 }
@@ -1681,9 +1665,6 @@ abstract class MethodFragment implements ExecutableFragment {
   @override
   InstanceFragment? get enclosingFragment;
 
-  @override
-  String get name;
-
   @override
   MethodFragment? get nextFragment;
 
@@ -1781,7 +1762,7 @@ abstract class PrefixElement2 implements Element2, FragmentedElement {
   LibraryElement2 get library2;
 
   @override
-  String get name;
+  String? get name;
 
   /// The name lookup scope for this import prefix.
   ///
@@ -1804,9 +1785,6 @@ abstract class PrefixFragment implements Fragment {
   /// Whether the [LibraryImport] is deferred.
   bool get isDeferred;
 
-  @override
-  String get name;
-
   @override
   PrefixFragment? get nextFragment;
 
@@ -1829,9 +1807,6 @@ abstract class PromotableElement2 implements VariableElement2 {
 abstract class PromotableFragment implements VariableFragment {
   @override
   PromotableElement2 get element;
-
-  @override
-  String get name;
 }
 
 /// A variable that has an associated getter and possibly a setter. Note that
@@ -1916,9 +1891,6 @@ abstract class PropertyInducingFragment
   // TODO(brianwilkerson): Should synthetic elements have a fragment?
   bool get isSynthetic;
 
-  @override
-  String get name;
-
   @override
   PropertyInducingFragment? get nextFragment;
 
@@ -1978,9 +1950,6 @@ abstract class SetterFragment implements ExecutableFragment {
   // @override
   // SetterElement get element;
 
-  @override
-  String? get name;
-
   /// The field or top-level variable associated with this setter.
   ///
   /// If this setter was explicitly defined (is not synthetic) then the variable
@@ -2130,9 +2099,6 @@ abstract class TypeAliasFragment
   @override
   LibraryFragment? get enclosingFragment;
 
-  @override
-  String get name;
-
   @override
   TypeAliasFragment? get nextFragment;
 
@@ -2195,9 +2161,6 @@ abstract class TypeParameterFragment implements TypeDefiningFragment {
   @override
   TypeParameterElement2 get element;
 
-  @override
-  String get name;
-
   @override
   TypeParameterFragment? get nextFragment;
 

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

@@ -96,7 +96,7 @@ import 'package:meta/meta.dart';
 // TODO(scheglov): Clean up the list of implicitly analyzed files.
 class AnalysisDriver {
   /// The version of data format, should be incremented on every format change.
-  static const int DATA_VERSION = 401;
+  static const int DATA_VERSION = 402;
 
   /// 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/element/element.dart

@@ -9017,7 +9017,7 @@ class PrefixElementImpl extends _ExistingElementImpl implements PrefixElement {
 
   PrefixElementImpl2 get element2 {
     return enclosingElement3.prefixes.firstWhere((element) {
-      return element.name == name;
+      return (element.name ?? '') == name;
     });
   }
 
@@ -9118,7 +9118,7 @@ class PrefixElementImpl2 extends ElementImpl2 implements PrefixElement2 {
   }
 
   @override
-  String get name => firstFragment.name;
+  String? get name => firstFragment.name2?.name;
 
   @override
   // TODO(scheglov): implement scope
@@ -9156,12 +9156,6 @@ class PrefixFragmentImpl implements PrefixFragment {
   @override
   final CompilationUnitElementImpl enclosingFragment;
 
-  @override
-  final String name;
-
-  @override
-  int nameOffset;
-
   @override
   FragmentNameImpl? name2;
 
@@ -9179,8 +9173,6 @@ class PrefixFragmentImpl implements PrefixFragment {
 
   PrefixFragmentImpl({
     required this.enclosingFragment,
-    required this.name,
-    required this.nameOffset,
     required this.name2,
     required this.isDeferred,
   });

pkg/analyzer/lib/src/summary2/bundle_reader.dart

@@ -1324,12 +1324,9 @@ class LibraryReader {
     return _reader.readOptionalObject((reader) {
       var fragmentName = _readFragmentName();
       var reference = _readReference();
-      var name = _reader.readStringReference();
       var isDeferred = _reader.readBool();
       var fragment = PrefixFragmentImpl(
         enclosingFragment: libraryFragment,
-        name: name,
-        nameOffset: -1,
         name2: fragmentName,
         isDeferred: isDeferred,
       );

pkg/analyzer/lib/src/summary2/bundle_writer.dart

@@ -506,7 +506,6 @@ class BundleWriter {
     _sink.writeOptionalObject(fragment, (fragment) {
       _writeFragmentName(fragment.name2);
       _writeReference2(fragment.element.reference);
-      _sink._writeStringReference(fragment.name);
       _sink.writeBool(fragment.isDeferred);
     });
   }

pkg/analyzer/lib/src/summary2/informative_data.dart

@@ -673,7 +673,6 @@ class InformativeDataApplier {
         }
 
         if (element.prefix2 case var prefixFragment?) {
-          prefixFragment.nameOffset = info.prefixOffset;
           if (prefixFragment.name2 case var name?) {
             name.nameOffset = info.prefixOffset;
           }

pkg/analyzer/lib/src/summary2/library_builder.dart

@@ -1212,8 +1212,6 @@ class LibraryBuilder with MacroApplicationsContainer {
 
     var fragment = PrefixFragmentImpl(
       enclosingFragment: libraryFragment,
-      name: unlinkedName?.name ?? '',
-      nameOffset: unlinkedName?.nameOffset ?? -1,
       name2: fragmentName,
       isDeferred: isDeferred,
     );