Add ClassSet to support ClassWorld.strictSubtypesOf

tests/compiler/dart2js/class_set_test.dart

 // Copyright (c) 2015, 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.
 
 // Test for iterators on for [SubclassNode].
 
 library world_test;
 
 import 'package:expect/expect.dart';
 import 'package:async_helper/async_helper.dart';
@@ skipping 37 matching lines @@
     ClassElement B = env.getElement("B");
     ClassElement C = env.getElement("C");
     ClassElement D = env.getElement("D");
     ClassElement E = env.getElement("E");
     ClassElement F = env.getElement("F");
     ClassElement G = env.getElement("G");
 
     void checkClass(ClassElement cls,
                     {bool directlyInstantiated: false,
                      bool indirectlyInstantiated: false}) {
-      ClassHierarchyNode node = world.classHierarchyNode(cls);
+      ClassHierarchyNode node = world.getClassHierarchyNode(cls);
       Expect.isNotNull(node, "Expected ClassHierarchyNode for $cls.");
       Expect.equals(
           directlyInstantiated || indirectlyInstantiated,
           node.isInstantiated,
           "Unexpected `isInstantiated` on ClassHierarchyNode for $cls.");
       Expect.equals(
           directlyInstantiated,
           node.isDirectlyInstantiated,
           "Unexpected `isDirectlyInstantiated` on ClassHierarchyNode for "
           "$cls.");
@@ skipping 55 matching lines @@
       } else {
         Expect.isNotNull(foundStack,
             "Expected non-null stack ${stack} in $sb.");
         Expect.listEquals(stack, foundStack,
             "Expected stack ${stack}, "
             "found ${foundStack} in $sb.");
       }
     }
 
     iterator = new ClassHierarchyNodeIterable(
-        world.classHierarchyNode(G)).iterator;
+        world.getClassHierarchyNode(G)).iterator;
     checkState(G, currentNode: null, stack: null);
     Expect.isNull(iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(G, currentNode: G, stack: []);
     Expect.equals(G, iterator.current);
     Expect.isFalse(iterator.moveNext());
     checkState(G, currentNode: null, stack: []);
     Expect.isNull(iterator.current);
 
     iterator = new ClassHierarchyNodeIterable(
-        world.classHierarchyNode(G), includeRoot: false).iterator;
+        world.getClassHierarchyNode(G),
+        includeRoot: false).iterator;
     checkState(G, currentNode: null, stack: null);
     Expect.isNull(iterator.current);
     Expect.isFalse(iterator.moveNext());
     checkState(G, currentNode: null, stack: []);
     Expect.isNull(iterator.current);
 
     iterator = new ClassHierarchyNodeIterable(
-        world.classHierarchyNode(C)).iterator;
+        world.getClassHierarchyNode(C)).iterator;
     checkState(C, currentNode: null, stack: null);
     Expect.isNull(iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(C, currentNode: C, stack: [E, F, G]);
     Expect.equals(C, iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(C, currentNode: E, stack: [F, G]);
     Expect.equals(E, iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(C, currentNode: F, stack: [G]);
     Expect.equals(F, iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(C, currentNode: G, stack: []);
     Expect.equals(G, iterator.current);
     Expect.isFalse(iterator.moveNext());
     checkState(C, currentNode: null, stack: []);
     Expect.isNull(iterator.current);
 
     iterator = new ClassHierarchyNodeIterable(
-        world.classHierarchyNode(D)).iterator;
+        world.getClassHierarchyNode(D)).iterator;
     checkState(D, currentNode: null, stack: null);
     Expect.isNull(iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(D, currentNode: D, stack: []);
     Expect.equals(D, iterator.current);
     Expect.isFalse(iterator.moveNext());
     checkState(D, currentNode: null, stack: []);
     Expect.isNull(iterator.current);
 
     iterator = new ClassHierarchyNodeIterable(
-        world.classHierarchyNode(B)).iterator;
+        world.getClassHierarchyNode(B)).iterator;
     checkState(B, currentNode: null, stack: null);
     Expect.isNull(iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(B, currentNode: B, stack: [D]);
     Expect.equals(B, iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(B, currentNode: D, stack: []);
     Expect.equals(D, iterator.current);
     Expect.isFalse(iterator.moveNext());
     checkState(B, currentNode: null, stack: []);
     Expect.isNull(iterator.current);
 
     iterator = new ClassHierarchyNodeIterable(
-        world.classHierarchyNode(B), includeRoot: false).iterator;
+        world.getClassHierarchyNode(B),
+        includeRoot: false).iterator;
     checkState(B, currentNode: null, stack: null);
     Expect.isNull(iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(B, currentNode: D, stack: []);
     Expect.equals(D, iterator.current);
     Expect.isFalse(iterator.moveNext());
     checkState(B, currentNode: null, stack: []);
     Expect.isNull(iterator.current);
 
     iterator = new ClassHierarchyNodeIterable(
-        world.classHierarchyNode(B), directlyInstantiatedOnly: true).iterator;
+        world.getClassHierarchyNode(B),
+        includeIndirectlyInstantiated: false).iterator;
     checkState(B, currentNode: null, stack: null);
     Expect.isNull(iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(B, currentNode: D, stack: []);
     Expect.equals(D, iterator.current);
     Expect.isFalse(iterator.moveNext());
     checkState(B, currentNode: null, stack: []);
     Expect.isNull(iterator.current);
 
     iterator = new ClassHierarchyNodeIterable(
-        world.classHierarchyNode(A)).iterator;
+        world.getClassHierarchyNode(A)).iterator;
     checkState(A, currentNode: null, stack: null);
     Expect.isNull(iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(A, currentNode: A, stack: [C, B]);
     Expect.equals(A, iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(A, currentNode: C, stack: [E, F, G, B]);
     Expect.equals(C, iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(A, currentNode: E, stack: [F, G, B]);
     Expect.equals(E, iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(A, currentNode: F, stack: [G, B]);
     Expect.equals(F, iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(A, currentNode: G, stack: [B]);
     Expect.equals(G, iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(A, currentNode: B, stack: [D]);
     Expect.equals(B, iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(A, currentNode: D, stack: []);
     Expect.equals(D, iterator.current);
     Expect.isFalse(iterator.moveNext());
     checkState(A, currentNode: null, stack: []);
     Expect.isNull(iterator.current);
 
     iterator = new ClassHierarchyNodeIterable(
-        world.classHierarchyNode(A), includeRoot: false).iterator;
+        world.getClassHierarchyNode(A),
+        includeRoot: false).iterator;
     checkState(A, currentNode: null, stack: null);
     Expect.isNull(iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(A, currentNode: C, stack: [E, F, G, B]);
     Expect.equals(C, iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(A, currentNode: E, stack: [F, G, B]);
     Expect.equals(E, iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(A, currentNode: F, stack: [G, B]);
     Expect.equals(F, iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(A, currentNode: G, stack: [B]);
     Expect.equals(G, iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(A, currentNode: B, stack: [D]);
     Expect.equals(B, iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(A, currentNode: D, stack: []);
     Expect.equals(D, iterator.current);
     Expect.isFalse(iterator.moveNext());
     checkState(A, currentNode: null, stack: []);
     Expect.isNull(iterator.current);
 
     iterator = new ClassHierarchyNodeIterable(
-        world.classHierarchyNode(A), directlyInstantiatedOnly: true).iterator;
+        world.getClassHierarchyNode(A),
+        includeIndirectlyInstantiated: false).iterator;
     checkState(A, currentNode: null, stack: null);
     Expect.isNull(iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(A, currentNode: A, stack: [C, B]);
     Expect.equals(A, iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(A, currentNode: C, stack: [E, F, G, B]);
     Expect.equals(C, iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(A, currentNode: E, stack: [F, G, B]);
     Expect.equals(E, iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(A, currentNode: F, stack: [G, B]);
     Expect.equals(F, iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(A, currentNode: G, stack: [B]);
     Expect.equals(G, iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(A, currentNode: D, stack: []);
     Expect.equals(D, iterator.current);
     Expect.isFalse(iterator.moveNext());
     checkState(A, currentNode: null, stack: []);
     Expect.isNull(iterator.current);
 
     iterator = new ClassHierarchyNodeIterable(
-        world.classHierarchyNode(A),
-        includeRoot: false, directlyInstantiatedOnly: true).iterator;
+        world.getClassHierarchyNode(A),
+        includeRoot: false,
+        includeIndirectlyInstantiated: false).iterator;
     checkState(A, currentNode: null, stack: null);
     Expect.isNull(iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(A, currentNode: C, stack: [E, F, G, B]);
     Expect.equals(C, iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(A, currentNode: E, stack: [F, G, B]);
     Expect.equals(E, iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(A, currentNode: F, stack: [G, B]);
     Expect.equals(F, iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(A, currentNode: G, stack: [B]);
     Expect.equals(G, iterator.current);
     Expect.isTrue(iterator.moveNext());
     checkState(A, currentNode: D, stack: []);
     Expect.equals(D, iterator.current);
     Expect.isFalse(iterator.moveNext());
     checkState(A, currentNode: null, stack: []);
     Expect.isNull(iterator.current);
   }));
 }