First step toward fixing cascades (issue 5062)

compiler/java/com/google/dart/compiler/resolver/Resolver.java

Index: compiler/java/com/google/dart/compiler/resolver/Resolver.java
===================================================================
--- compiler/java/com/google/dart/compiler/resolver/Resolver.java	(revision 12980)
+++ compiler/java/com/google/dart/compiler/resolver/Resolver.java	(working copy)
@@ -696,7 +696,7 @@
       {
         DartTypeNode rcTypeName = node.getRedirectedTypeName();
         if (rcTypeName != null) {
-          InterfaceType rcType = (InterfaceType) resolveType(rcTypeName, true, true, false,
+          Type rcType = resolveType(rcTypeName, true, true, false,
               TypeErrorCode.NO_SUCH_TYPE, ResolverErrorCode.WRONG_NUMBER_OF_TYPE_ARGUMENTS);
           switch (TypeKind.of(rcType)) {
             case INTERFACE:
@@ -1323,7 +1323,7 @@
 
     @Override
     public Element visitPropertyAccess(DartPropertyAccess x) {
-      Element qualifier = resolveQualifier(x.getQualifier());
+      Element qualifier = resolveQualifier(x.getRealTarget());
       Element element = null;
       switch (ElementKind.of(qualifier)) {
         case CLASS:
@@ -1434,11 +1434,11 @@
         case NONE: {
           // TODO(zundel): This is a bit awkward.  Maybe it would be better to have an
           // ElementKind of THIS just like we have for SUPER?
-          if (x.getQualifier() instanceof DartThisExpression) {
+          if (x.getRealTarget() instanceof DartThisExpression) {
             Element foundElement = Elements.findElement(currentHolder, x.getPropertyName());
             if (foundElement != null && !foundElement.getModifiers().isStatic()) {
               if (ElementKind.of(foundElement) == ElementKind.TYPE_VARIABLE) {
-                onError(x.getQualifier(), ResolverErrorCode.TYPE_VARIABLE_NOT_ALLOWED_IN_IDENTIFIER);
+                onError(x.getRealTarget(), ResolverErrorCode.TYPE_VARIABLE_NOT_ALLOWED_IN_IDENTIFIER);
                 break;
               }
               element = foundElement;
@@ -1486,7 +1486,7 @@
     @Override
     public Element visitMethodInvocation(DartMethodInvocation x) {
       DartIdentifier name = x.getFunctionName();
-      Element target = resolveQualifier(x.getTarget());
+      Element target = resolveQualifier(x.getRealTarget());
       Element element = null;
 
       switch (ElementKind.of(target)) {
@@ -1586,7 +1586,9 @@
 
     @Override
     public Element visitFunctionObjectInvocation(DartFunctionObjectInvocation x) {
-      x.getTarget().accept(this);
+      if (!x.isCascade()) {
+        x.getTarget().accept(this);
+      }
       visit(x.getArguments());
       return null;
     }