[es6] implement destructuring assignment

src/prettyprinter.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/prettyprinter.h"
 
 #include <stdarg.h>
 
 #include "src/ast-value-factory.h"
 #include "src/base/platform/platform.h"
@@ skipping 233 matching lines @@
 
 
 void CallPrinter::VisitRegExpLiteral(RegExpLiteral* node) {
   Print("/");
   PrintLiteral(node->pattern(), false);
   Print("/");
   PrintLiteral(node->flags(), false);
 }
 
 
+void CallPrinter::VisitAssignmentPattern(AssignmentPattern* node) {
+  Visit(node->pattern());
+}
+
+
 void CallPrinter::VisitObjectLiteral(ObjectLiteral* node) {
   for (int i = 0; i < node->properties()->length(); i++) {
     Find(node->properties()->at(i)->value());
   }
 }
 
 
 void CallPrinter::VisitArrayLiteral(ArrayLiteral* node) {
   Print("[");
   for (int i = 0; i < node->values()->length(); i++) {
@@ skipping 463 matching lines @@
 
 void PrettyPrinter::VisitRegExpLiteral(RegExpLiteral* node) {
   Print(" RegExp(");
   PrintLiteral(node->pattern(), false);
   Print(",");
   PrintLiteral(node->flags(), false);
   Print(") ");
 }
 
 
+void PrettyPrinter::VisitAssignmentPattern(AssignmentPattern* node) {
+  Visit(node->pattern());
+}
+
+
 void PrettyPrinter::VisitObjectLiteral(ObjectLiteral* node) {
   Print("{ ");
   for (int i = 0; i < node->properties()->length(); i++) {
     if (i != 0) Print(",");
     PrintObjectLiteralProperty(node->properties()->at(i));
   }
   Print(" }");
 }
 
 
@@ skipping 711 matching lines @@
 void AstPrinter::VisitRegExpLiteral(RegExpLiteral* node) {
   IndentedScope indent(this, "REGEXP LITERAL", node->position());
   EmbeddedVector<char, 128> buf;
   SNPrintF(buf, "literal_index = %d\n", node->literal_index());
   PrintIndented(buf.start());
   PrintLiteralIndented("PATTERN", node->pattern(), false);
   PrintLiteralIndented("FLAGS", node->flags(), false);
 }
 
 
+void AstPrinter::VisitAssignmentPattern(AssignmentPattern* node) {
+  IndentedScope indent(this, "ASSIGNMENT PATTERN", node->position());
+  Visit(node->pattern());
+}
+
+
 void AstPrinter::VisitObjectLiteral(ObjectLiteral* node) {
   IndentedScope indent(this, "OBJ LITERAL", node->position());
   EmbeddedVector<char, 128> buf;
   SNPrintF(buf, "literal_index = %d\n", node->literal_index());
   PrintIndented(buf.start());
   PrintProperties(node->properties());
 }
 
 
 void AstPrinter::VisitArrayLiteral(ArrayLiteral* node) {
@@ skipping 151 matching lines @@
 
 void AstPrinter::VisitSuperCallReference(SuperCallReference* node) {
   IndentedScope indent(this, "SUPER-CALL-REFERENCE", node->position());
 }
 
 
 #endif  // DEBUG
 
 }  // namespace internal
 }  // namespace v8