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      1 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef BASE_NULLABLE_STRING16_H_
      6 #define BASE_NULLABLE_STRING16_H_
      7 
      8 #include "base/string16.h"
      9 
     10 // This class is a simple wrapper for string16 which also contains a null
     11 // state.  This should be used only where the difference between null and
     12 // empty is meaningful.
     13 class NullableString16 {
     14  public:
     15   NullableString16() : is_null_(false) { }
     16   explicit NullableString16(bool is_null) : is_null_(is_null) { }
     17   NullableString16(const string16& string, bool is_null)
     18       : string_(string), is_null_(is_null) {
     19   }
     20 
     21   const string16& string() const { return string_; }
     22   bool is_null() const { return is_null_; }
     23 
     24  private:
     25   string16 string_;
     26   bool is_null_;
     27 };
     28 
     29 #endif  // BASE_NULLABLE_STRING16_H_
     30