[es6] implement spread calls

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 <stdarg.h>
 
 #include "src/v8.h"
 
 #include "src/ast-value-factory.h"
 #include "src/base/platform/platform.h"
@@ skipping 357 matching lines @@
 
 void CallPrinter::VisitCompareOperation(CompareOperation* node) {
   Print("(");
   Find(node->left(), true);
   Print(" %s ", Token::String(node->op()));
   Find(node->right(), true);
   Print(")");
 }
 
 
+void CallPrinter::VisitSpread(Spread* node) {
+  Print("(...");
+  Find(node->expression(), true);
+  Print(")");
+}
+
+
 void CallPrinter::VisitThisFunction(ThisFunction* node) {}
 
 
 void CallPrinter::VisitSuperReference(SuperReference* node) {}
 
 
 void CallPrinter::FindStatements(ZoneList<Statement*>* statements) {
   if (statements == NULL) return;
   for (int i = 0; i < statements->length(); i++) {
     Find(statements->at(i));
@@ skipping 475 matching lines @@
 
 void PrettyPrinter::VisitCompareOperation(CompareOperation* node) {
   Print("(");
   Visit(node->left());
   Print(" %s ", Token::String(node->op()));
   Visit(node->right());
   Print(")");
 }
 
 
+void PrettyPrinter::VisitSpread(Spread* node) {
+  Print("(...");
+  Visit(node->expression());
+  Print(")");
+}
+
+
 void PrettyPrinter::VisitThisFunction(ThisFunction* node) {
   Print("<this-function>");
 }
 
 
 void PrettyPrinter::VisitSuperReference(SuperReference* node) {
   Print("<super-reference>");
 }
 
 
@@ skipping 683 matching lines @@
 }
 
 
 void AstPrinter::VisitCompareOperation(CompareOperation* node) {
   IndentedScope indent(this, Token::Name(node->op()));
   Visit(node->left());
   Visit(node->right());
 }
 
 
+void AstPrinter::VisitSpread(Spread* node) {
+  IndentedScope indent(this, "...");
+  Visit(node->expression());
+}
+
+
 void AstPrinter::VisitThisFunction(ThisFunction* node) {
   IndentedScope indent(this, "THIS-FUNCTION");
 }
 
 
 void AstPrinter::VisitSuperReference(SuperReference* node) {
   IndentedScope indent(this, "SUPER-REFERENCE");
 }
 
 #endif  // DEBUG
 
 } }  // namespace v8::internal