Constant evaluation support

editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/object/ListState.java

Index: editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/object/ListState.java
diff --git a/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/object/ListState.java b/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/object/ListState.java
new file mode 100644
index 0000000000000000000000000000000000000000..a22ca0692ceb95b251165e8bb49b884662cc2526
--- /dev/null
+++ b/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/object/ListState.java
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2013, the Dart project authors.
+ * 
+ * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ * 
+ * http://www.eclipse.org/legal/epl-v10.html
+ * 
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package com.google.dart.engine.internal.object;
+
+/**
+ * The unique instance of the class {@code ListState} represents the state of an object representing
+ * a list.
+ */
+public class ListState extends InstanceState {
+  /**
+   * The elements of the list.
+   */
+  private DartObjectImpl[] elements;
+
+  /**
+   * Initialize a newly created state to represent a list with the given elements.
+   * 
+   * @param elements the elements of the list
+   */
+  public ListState(DartObjectImpl[] elements) {
+    this.elements = elements;
+  }
+
+  @Override
+  public StringState convertToString() {
+    return StringState.UNKNOWN_VALUE;
+  }
+
+  @Override
+  public boolean equals(Object object) {
+    if (!(object instanceof ListState)) {
+      return false;
+    }
+    DartObjectImpl[] otherElements = ((ListState) object).elements;
+    int count = elements.length;
+    if (otherElements.length != count) {
+      return false;
+    } else if (count == 0) {
+      return true;
+    }
+    for (int i = 0; i < count; i++) {
+      if (!elements[i].equals(otherElements[i])) {
+        return false;
+      }
+    }
+    return true;
+  }
+
+  @Override
+  public BoolState equalEqual(InstanceState rightOperand) throws EvaluationException {
+    assertBoolNumStringOrNull(rightOperand);
+    if (rightOperand instanceof DynamicState) {
+      return BoolState.UNKNOWN_VALUE;
+    }
+    return BoolState.from(equals(rightOperand));
+  }
+
+  @Override
+  public String getTypeName() {
+    return "List"; //$NON-NLS-0$
+  }
+
+  @Override
+  public int hashCode() {
+    int value = 0;
+    int count = elements.length;
+    for (int i = 0; i < count; i++) {
+      value = (value << 3) ^ elements[i].hashCode();
+    }
+    return value;
+  }
+}