1 files changed, 10 insertions, 0 deletions
diff --git a/core/fxcrt/cfx_widestring.h b/core/fxcrt/cfx_widestring.h
index 9922e4277a..595615a0b2 100644
--- a/core/fxcrt/cfx_widestring.h
+++ b/core/fxcrt/cfx_widestring.h
@@ -8,6 +8,7 @@
 #define CORE_FXCRT_CFX_WIDESTRING_H_
 
 #include <functional>
+#include <iterator>
 #include <utility>
 
 #include "core/fxcrt/cfx_retain_ptr.h"
@@ -25,6 +26,7 @@ class CFX_WideString {
  public:
   using CharType = wchar_t;
   using const_iterator = const CharType*;
+  using const_reverse_iterator = std::reverse_iterator<const_iterator>;
 
   CFX_WideString();
   CFX_WideString(const CFX_WideString& other);
@@ -73,6 +75,14 @@ class CFX_WideString {
     return m_pData ? m_pData->m_String + m_pData->m_nDataLength : nullptr;
   }
 
+  // Note: Any subsequent modification of |this| will invalidate iterators.
+  const_reverse_iterator rbegin() const {
+    return const_reverse_iterator(end());
+  }
+  const_reverse_iterator rend() const {
+    return const_reverse_iterator(begin());
+  }
+
   void clear() { m_pData.Reset(); }
 
   FX_STRSIZE GetLength() const { return m_pData ? m_pData->m_nDataLength : 0; }