Element model support for covariant

pkg/analyzer/lib/src/summary/summarize_ast.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library serialization.summarize_ast;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/token.dart';
 import 'package:analyzer/dart/ast/visitor.dart';
 import 'package:analyzer/dart/element/type.dart' show DartType;
@@ skipping 789 matching lines @@
   /**
    * Serialize a [FieldFormalParameter], [FunctionTypedFormalParameter], or
    * [SimpleFormalParameter] into an [UnlinkedParam].
    */
   UnlinkedParamBuilder serializeParameter(NormalFormalParameter node) {
     UnlinkedParamBuilder b = new UnlinkedParamBuilder();
     b.name = node.identifier.name;
     b.nameOffset = node.identifier.offset;
     b.annotations = serializeAnnotations(node.metadata);
     b.codeRange = serializeCodeRange(node);
+    b.isExplicitlyCovariant = node.covariantKeyword != null;
     if (_parametersMayInheritCovariance) {
       b.inheritsCovariantSlot = assignSlot();
     }
     switch (node.kind) {
       case ParameterKind.REQUIRED:
         b.kind = UnlinkedParamKind.required;
         break;
       case ParameterKind.POSITIONAL:
         b.kind = UnlinkedParamKind.positional;
         break;
@@ skipping 144 matching lines @@
    * Serialize the given [variables] into [UnlinkedVariable]s, and store them
    * in [this.variables].
    */
   void serializeVariables(
       AstNode scopeNode,
       VariableDeclarationList variables,
       bool isDeclaredStatic,
       Comment documentationComment,
       NodeList<Annotation> annotations,
       bool isField) {
+    bool isCovariant = isField
+        ? (variables.parent as FieldDeclaration).covariantKeyword != null
+        : false;
     for (VariableDeclaration variable in variables.variables) {
       UnlinkedVariableBuilder b = new UnlinkedVariableBuilder();
+      b.isConst = variables.isConst;
+      b.isCovariant = isCovariant;
       b.isFinal = variables.isFinal;
-      b.isConst = variables.isConst;
       b.isStatic = isDeclaredStatic;
       b.name = variable.name.name;
       b.nameOffset = variable.name.offset;
       b.type = serializeTypeName(variables.type);
       b.documentationComment = serializeDocumentation(documentationComment);
       b.annotations = serializeAnnotations(annotations);
       b.codeRange = serializeCodeRange(variables.parent);
       bool serializeBodyExpr = variable.isConst ||
           variable.isFinal && isField && !isDeclaredStatic ||
           variables.type == null;
@@ skipping 426 matching lines @@
 /**
  * A [_TypeParameterScope] is a [_Scope] which defines [_ScopedTypeParameter]s.
  */
 class _TypeParameterScope extends _Scope {
   /**
    * Get the number of [_ScopedTypeParameter]s defined in this
    * [_TypeParameterScope].
    */
   int get length => _definedNames.length;
 }