base/nullable_string16.h

   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 #pragma once
   8
   9 #include "base/string16.h"
  10
  11 // This class is a simple wrapper for string16 which also contains a null
  12 // state.  This should be used only where the difference between null and
  13 // empty is meaningful.
  14 class NullableString16 {
  15  public:
  16   NullableString16() : is_null_(false) { }
  17   explicit NullableString16(bool is_null) : is_null_(is_null) { }
  18   NullableString16(const string16& string, bool is_null)
  19       : string_(string), is_null_(is_null) {
  20   }
  21
  22   const string16& string() const { return string_; }
  23   bool is_null() const { return is_null_; }
  24
  25  private:
  26   string16 string_;
  27   bool is_null_;
  28 };
  29
  30 #endif  // BASE_NULLABLE_STRING16_H_