Use shorter names for constructor arguments.

lib/compiler/implementation/emitter.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.
 
 /**
  * A function element that represents a closure call. The signature is copied
  * from the given element.
  */
 class ClosureInvocationElement extends FunctionElement {
   ClosureInvocationElement(SourceString name,
@@ skipping 219 matching lines @@
                           StringBuffer argumentsBuffer,
                           StringBuffer bodyBuffer) {
     bool isFirst = true;
     void generateFieldInit(ClassElement enclosingClass, Element member) {
       // TODO(floitsch): make sure there are no name clashes.
       String className = namer.getName(enclosingClass);
       if (!isFirst) argumentsBuffer.add(', ');
       isFirst = false;
       String memberName = namer.instanceFieldName(member.getLibrary(),
                                                   member.name);
-      argumentsBuffer.add('${className}_$memberName');
-      bodyBuffer.add('  this.$memberName = ${className}_$memberName;\n');
+      String parameter;
+      if (classElement === enclosingClass) {
+        parameter = memberName;
+      } else {
+        parameter = '${className}_$memberName';
+      }
+      argumentsBuffer.add(parameter);
+      bodyBuffer.add('  this.$memberName = $parameter;\n');
     }
 
     classElement.forEachInstanceField(generateFieldInit,
                                       includeBackendMembers: true,
                                       includeSuperMembers: true);
   }
 
   void emitInherits(ClassElement cls, StringBuffer buffer) {
     ClassElement superclass = cls.superclass;
     if (superclass !== null) {
@@ skipping 34 matching lines @@
     if (compiler.universe.instantiatedClasses.contains(classElement)) {
       generateFieldInits(classElement, buffer, bodyBuffer);
     }
     buffer.add(') {\n');
     buffer.add(bodyBuffer);
     buffer.add('};\n');
 
     emitInherits(classElement, buffer);
 
     String attachTo(String name) => '$className.prototype.$name';
-    
+
     classElement.forEachMember(includeBackendMembers: true,
                                f: (ClassElement enclosing, Element member) {
       if (member.isInstanceMember()) {
         addInstanceMember(member, attachTo, buffer);
       }
     });
 
     generateTypeTests(classElement, (Element other) {
       buffer.add('${attachTo(namer.operatorIs(other))} = ');
       if (nativeEmitter.requiresNativeIsCheck(other)) {
@@ skipping 344 matching lines @@
                          Selector.SETTER);
         }
       } else {
         String jsName = namer.setterName(null, setterName);
         generateMethod('set ${setterName.slowToString()}', jsName,
                        Selector.SETTER);
       }
     });
   }
 
-  String buildIsolateSetup(StringBuffer buffer, 
-                           Element appMain, 
+  String buildIsolateSetup(StringBuffer buffer,
+                           Element appMain,
                            Element isolateMain) {
     String mainAccess = "${namer.isolateAccess(appMain)}";
     String currentIsolate = "${namer.CURRENT_ISOLATE}";
     String mainEnsureGetter = '';
     // Since we pass the closurized version of the main method to
     // the isolate method, we must make sure that it exists.
     if (!compiler.universe.staticFunctionsNeedingGetter.contains(appMain)) {
       String invocationName =
           "${namer.closureInvocationName(Selector.INVOCATION_0)}";
       mainEnsureGetter = "$mainAccess.$invocationName = $mainAccess";
@@ skipping 61 matching lines @@
       mainBuffer.add(
           'var ${namer.CURRENT_ISOLATE} = new ${namer.ISOLATE}();\n');
       nativeEmitter.emitDynamicDispatchMetadata();
       nativeEmitter.assembleCode(mainBuffer);
       emitMain(mainBuffer);
       compiler.assembledCode = mainBuffer.toString();
     });
     return compiler.assembledCode;
   }
 }