From f57cad4f5dd0436d5b207d362afb34fc5f3f9acb Mon Sep 17 00:00:00 2001
From: Artem Strygin <art-snake@yandex-team.ru>
Date: Mon, 14 Aug 2017 23:35:52 +0300
Subject: Add CPDF_ObjectWalker.

It is allow us to walk on all non-null sub-objects
in an object in depth, include itself,

Change-Id: Ia23051073984411668112422b47cf7a4460aa078
Reviewed-on: https://pdfium-review.googlesource.com/8910
Commit-Queue: Art Snake <art-snake@yandex-team.ru>
Reviewed-by: dsinclair <dsinclair@chromium.org>
---
 core/fpdfapi/parser/cpdf_null.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'core/fpdfapi/parser/cpdf_null.cpp')

diff --git a/core/fpdfapi/parser/cpdf_null.cpp b/core/fpdfapi/parser/cpdf_null.cpp
index 254c86fd7a..7c1cdac486 100644
--- a/core/fpdfapi/parser/cpdf_null.cpp
+++ b/core/fpdfapi/parser/cpdf_null.cpp
@@ -20,3 +20,7 @@ std::unique_ptr<CPDF_Object> CPDF_Null::Clone() const {
 bool CPDF_Null::WriteTo(IFX_ArchiveStream* archive) const {
   return archive->WriteString(" null");
 }
+
+bool CPDF_Null::IsNull() const {
+  return true;
+}
-- 
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