From 5913a6ca71c85401e3f5317758d44a9fc4a667b2 Mon Sep 17 00:00:00 2001
From: tsepez <tsepez@chromium.org>
Date: Wed, 16 Nov 2016 17:31:18 -0800
Subject: Make CPDF_Object subclass constructors intern strings

Make CDPF_Arrays intern the object they create.
Allow passing nullptr as a CFX_WeakPtr shortcut as well.

Review-Url: https://codereview.chromium.org/2509123002
---
 core/fpdfapi/parser/cpdf_object.h | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'core/fpdfapi/parser/cpdf_object.h')

diff --git a/core/fpdfapi/parser/cpdf_object.h b/core/fpdfapi/parser/cpdf_object.h
index c24b40a789..9c41e9de7b 100644
--- a/core/fpdfapi/parser/cpdf_object.h
+++ b/core/fpdfapi/parser/cpdf_object.h
@@ -9,6 +9,7 @@
 
 #include <memory>
 #include <set>
+#include <type_traits>
 
 #include "core/fxcrt/fx_string.h"
 #include "core/fxcrt/fx_system.h"
@@ -117,4 +118,12 @@ class CPDF_Object {
   CPDF_Object(const CPDF_Object& src) {}
 };
 
+template <typename T>
+struct CanInternStrings {
+  static const bool value = std::is_same<T, CPDF_Array>::value ||
+                            std::is_same<T, CPDF_Dictionary>::value ||
+                            std::is_same<T, CPDF_Name>::value ||
+                            std::is_same<T, CPDF_String>::value;
+};
+
 #endif  // CORE_FPDFAPI_PARSER_CPDF_OBJECT_H_
-- 
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