WIP: new.target

src/ast.h

Index: src/ast.h
diff --git a/src/ast.h b/src/ast.h
index 16ed8f7da2777fb9737486f427a3044dc46c9624..2bded5303705519ba3e3fcdde81a3a966bda6e1e 100644
--- a/src/ast.h
+++ b/src/ast.h
@@ -1667,6 +1667,8 @@ class VariableProxy final : public Expression {
 
   bool is_this() const { return IsThisField::decode(bit_field_); }
 
+  bool is_new_target() const { return IsNewTargetField::decode(bit_field_); }
+
   bool is_assigned() const { return IsAssignedField::decode(bit_field_); }
   void set_is_assigned() {
     bit_field_ = IsAssignedField::update(bit_field_, true);
@@ -1706,8 +1708,9 @@ class VariableProxy final : public Expression {
                 int end_position);
 
   class IsThisField : public BitField8<bool, 0, 1> {};
-  class IsAssignedField : public BitField8<bool, 1, 1> {};
-  class IsResolvedField : public BitField8<bool, 2, 1> {};
+  class IsNewTargetField : public BitField8<bool, 1, 1> {};
+  class IsAssignedField : public BitField8<bool, 2, 1> {};
+  class IsResolvedField : public BitField8<bool, 3, 1> {};
 
   // Start with 16-bit (or smaller) field, which should get packed together
   // with Expression's trailing 16-bit field.