[es7] implement |do| expressions proposal

src/ast-numbering.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-numbering.h"
 
 #include "src/ast.h"
 #include "src/scopes.h"
 
 namespace v8 {
@@ skipping 114 matching lines @@
 
 
 void AstNumberingVisitor::VisitNativeFunctionLiteral(
     NativeFunctionLiteral* node) {
   IncrementNodeCount();
   DisableOptimization(kNativeFunctionLiteral);
   node->set_base_id(ReserveIdRange(NativeFunctionLiteral::num_ids()));
 }
 
 
+void AstNumberingVisitor::VisitDoExpression(DoExpression* node) {
+  IncrementNodeCount();
+  node->set_base_id(ReserveIdRange(DoExpression::num_ids()));
+  if (node->result()->is_assigned()) {
+    Visit(node->result());
+  }
+  VisitDeclarations(node->scope()->declarations());
+  VisitStatements(node->statements());
+}
+
+
 void AstNumberingVisitor::VisitLiteral(Literal* node) {
   IncrementNodeCount();
   node->set_base_id(ReserveIdRange(Literal::num_ids()));
 }
 
 
 void AstNumberingVisitor::VisitRegExpLiteral(RegExpLiteral* node) {
   IncrementNodeCount();
   node->set_base_id(ReserveIdRange(RegExpLiteral::num_ids()));
 }
@@ skipping 423 matching lines @@
 }
 
 
 bool AstNumbering::Renumber(Isolate* isolate, Zone* zone,
                             FunctionLiteral* function) {
   AstNumberingVisitor visitor(isolate, zone);
   return visitor.Renumber(function);
 }
 }  // namespace internal
 }  // namespace v8