Give different runtime type representations to different types with the same name.

lib/compiler/implementation/runtime_types.dart

 // Copyright (c) 2012, 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('runtime_types');
 
 #import('leg.dart');
 #import('elements/elements.dart');
 #import('tree/tree.dart');
 #import('universe/universe.dart');
 #import('util/util.dart');
 
 class RuntimeTypeInformation {
+  /**
+   * Names used for elements in runtime type information. This map is kept to
+   * detect elements with the same name and add a library prefix to them.

[kasperl, 2012/10/11 13:18:51]

You're not really adding a library prefix to them.

[karlklose, 2012/10/11 13:29:42]

Done.

+   */
+  final Map<String, Element> usedNames = new Map<String, Element>();
+
+  /** Get a unique name for the element. */
+  String getName(Element element) {
+    String guess = element.name.slowToString();
+    String name = guess;
+    int id = 0;
+    while (usedNames.containsKey(name) && usedNames[name] != element) {
+      name = '$guess@$id';

[kasperl, 2012/10/11 13:18:51]

You need to increase id in here.

[karlklose, 2012/10/11 13:29:42]

Done.

+    }
+    usedNames[name] = element;
+    return name;
+  }
+
   bool hasTypeArguments(DartType type) {
     if (type is InterfaceType) {
       InterfaceType interfaceType = type;
       return !interfaceType.arguments.isEmpty();
     }
     return false;
   }
 
   /**
    * Map type variables to strings calling [:stringify:] and joins the results
@@ skipping 17 matching lines @@
     });
     return buffer.toString();
   }
 
   /**
    * Generate a string representation template for this element, using '#' to
    * denote the place for the type argument input. If there are more type
    * variables than [numberOfInputs], 'Dynamic' is used as the value for these
    * arguments.
    */
-  static String generateRuntimeTypeString(ClassElement element,
-                                          int numberOfInputs) {
-    String elementName = element.name.slowToString();
+  String generateRuntimeTypeString(ClassElement element, int numberOfInputs) {
+    String elementName = getName(element);
     if (element.typeVariables.isEmpty()) return "'$elementName'";
     String stringify(_, bool hasValue) => hasValue ? "' + # + '" : "Dynamic";
     String arguments = stringifyTypeVariables(element.typeVariables,
                                               numberOfInputs,
                                               stringify);
     return "'$elementName<$arguments>'";
   }
 
   /**
    * Generate a string template for the runtime type fields that contain the
    * type descriptions of the reified type arguments, using '#' to denote the
    * place for the type argument value, or [:null:] if there are more than
    * [numberOfInputs] type variables.
    */
   static String generateTypeVariableString(ClassElement element,
                                            int numberOfInputs) {
     String stringify(TypeVariableType variable, bool hasValue) {
       return "'${variable.name.slowToString()}': #";
     }
     return stringifyTypeVariables(element.typeVariables, numberOfInputs,
                                   stringify);
   }
 }