New analyzer snapshot with MapIterator.

pkg/analyzer/lib/src/generated/source.dart

 // Copyright (c) 2014, 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.
 
 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
 library engine.source;
 
 import 'java_core.dart';
@@ skipping 593 matching lines @@
   /**
    * @return the instance of [SourceRange] with end moved on "delta".
    */
   SourceRange getMoveEnd(int delta) => new SourceRange(offset, length + delta);
 
   /**
    * @return the expanded translated of [SourceRange], with moved start and the same length.
    */
   SourceRange getTranslated(int delta) => new SourceRange(offset + delta, length);
 
+  /**
+   * @return the minimal [SourceRange] that cover this and the given [SourceRange]s.
+   */
+  SourceRange getUnion(SourceRange other) {
+    int newOffset = Math.min(offset, other.offset);
+    int newEnd = Math.max(offset + length, other.offset + other.length);
+    return new SourceRange(newOffset, newEnd - newOffset);
+  }
+
   @override
   int get hashCode => 31 * offset + length;
 
   /**
    * @return `true` if this [SourceRange] intersects with given.
    */
   bool intersects(SourceRange other) {
     if (other == null) {
       return false;
     }
@@ skipping 233 matching lines @@
       int oldStamp = javaMapPut(_stampMap, source, newStamp);
       // Occasionally, if this method is called in rapid succession, the timestamps are equal.
       // Guard against this by artificially incrementing the new timestamp
       if (newStamp == oldStamp) {
         _stampMap[source] = newStamp + 1;
       }
       return javaMapPut(_contentMap, source, contents);
     }
   }
 }