Add propagated types to summary files.

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/visitor.dart';
 import 'package:analyzer/src/generated/scanner.dart';
 import 'package:analyzer/src/generated/utilities_dart.dart';
@@ skipping 203 matching lines @@
    */
   int libraryNameLength;
 
   /**
    * If the library has a library directive, the documentation comment for it
    * (if any).  Otherwise `null`.
    */
   UnlinkedDocumentationCommentBuilder libraryDocumentationComment;
 
   /**
+   * The number of slot ids which have been assigned to this compilation unit.
+   */
+  int numSlots = 0;
+
+  /**
+   * Create a slot id for storing a propagated or inferred type.
+   */
+  int assignTypeSlot() => ++numSlots;
+
+  /**
    * Build a [_Scope] object containing the names defined within the body of a
    * class declaration.
    */
   _Scope buildClassMemberScope(NodeList<ClassMember> members) {
     _Scope scope = new _Scope();
     for (ClassMember member in members) {
       // TODO(paulbery): consider replacing these if-tests with dynamic method
       // dispatch.
       if (member is MethodDeclaration) {
         if (member.isSetter || member.isOperator) {
@@ skipping 370 matching lines @@
       b.nameOffset = variable.name.offset;
       b.type = serializeTypeName(variables.type);
       b.hasImplicitType = variables.type == null;
       b.documentationComment = serializeDocumentation(documentationComment);
       if (variable.isConst) {
         Expression initializer = variable.initializer;
         if (initializer != null) {
           b.constExpr = serializeConstExpr(initializer);
         }
       }
+      if (variable.initializer != null &&
+          (variables.isFinal || variables.isConst)) {
+        b.propagatedTypeSlot = assignTypeSlot();
+      }
       this.variables.add(b);
     }
   }
 
   @override
   void visitClassDeclaration(ClassDeclaration node) {
     currentClassDeclaration = node;
     TypeName superclass =
         node.extendsClause == null ? null : node.extendsClause.superclass;
     serializeClass(
@@ skipping 237 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;
 }