[ESnext] Implement Object spread

src/ast/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/ast/prettyprinter.h"
 
 #include <stdarg.h>
 
 #include "src/ast/ast-value-factory.h"
 #include "src/ast/scopes.h"
@@ skipping 1007 matching lines @@
         break;
       case ObjectLiteral::Property::PROTOTYPE:
         prop_kind = "PROTOTYPE";
         break;
       case ObjectLiteral::Property::GETTER:
         prop_kind = "GETTER";
         break;
       case ObjectLiteral::Property::SETTER:
         prop_kind = "SETTER";
         break;
+      case ObjectLiteral::Property::SPREAD:
+        prop_kind = "SPREAD";
+        break;
     }
     EmbeddedVector<char, 128> buf;
     SNPrintF(buf, "PROPERTY - %s", prop_kind);
     IndentedScope prop(this, buf.start());
     PrintIndentedVisit("KEY", properties->at(i)->key());
     PrintIndentedVisit("VALUE", properties->at(i)->value());
   }
 }
 
 
@@ skipping 178 matching lines @@
 
 void AstPrinter::VisitRewritableExpression(RewritableExpression* node) {
   Visit(node->expression());
 }
 
 
 #endif  // DEBUG
 
 }  // namespace internal
 }  // namespace v8