[es6] implement destructuring assignment

src/ast/prettyprinter.cc

Index: src/ast/prettyprinter.cc
diff --git a/src/ast/prettyprinter.cc b/src/ast/prettyprinter.cc
index 8317d9497764a4cd00ee91580feb3a1be46f05b7..05590f30cb01224b0801e27bd9391d237fbe727e 100644
--- a/src/ast/prettyprinter.cc
+++ b/src/ast/prettyprinter.cc
@@ -420,6 +420,12 @@ void CallPrinter::VisitSuperCallReference(SuperCallReference* node) {
 }
 
 
+void CallPrinter::VisitRewritableAssignmentExpression(
+    RewritableAssignmentExpression* node) {
+  Find(node->expression());
+}
+
+
 void CallPrinter::FindStatements(ZoneList<Statement*>* statements) {
   if (statements == NULL) return;
   for (int i = 0; i < statements->length(); i++) {
@@ -931,6 +937,12 @@ void PrettyPrinter::VisitSuperCallReference(SuperCallReference* node) {
 }
 
 
+void PrettyPrinter::VisitRewritableAssignmentExpression(
+    RewritableAssignmentExpression* node) {
+  Visit(node->expression());
+}
+
+
 const char* PrettyPrinter::Print(AstNode* node) {
   Init();
   Visit(node);
@@ -1682,6 +1694,12 @@ void AstPrinter::VisitSuperCallReference(SuperCallReference* node) {
 }
 
 
+void AstPrinter::VisitRewritableAssignmentExpression(
+    RewritableAssignmentExpression* node) {
+  Visit(node->expression());
+}
+
+
 #endif  // DEBUG
 
 }  // namespace internal