security/sandbox/chromium/base/strings/nullable_string16.h@44a2da4a2ab2 (annotated)
security/sandbox/chromium/base/strings/nullable_string16.h
Fri, 16 Jan 2015 04:50:19 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Fri, 16 Jan 2015 04:50:19 +0100
- branch
- TOR_BUG_9701
- changeset 13
- 44a2da4a2ab2
- permissions
- -rw-r--r--
Replace accessor implementation with direct member state manipulation, by
request https://trac.torproject.org/projects/tor/ticket/9701#comment:32
| michael@0 | 1 | // Copyright (c) 2010 The Chromium Authors. All rights reserved. |
| michael@0 | 2 | // Use of this source code is governed by a BSD-style license that can be |
| michael@0 | 3 | // found in the LICENSE file. |
| michael@0 | 4 | |
| michael@0 | 5 | #ifndef BASE_STRINGS_NULLABLE_STRING16_H_ |
| michael@0 | 6 | #define BASE_STRINGS_NULLABLE_STRING16_H_ |
| michael@0 | 7 | |
| michael@0 | 8 | #include <iosfwd> |
| michael@0 | 9 | |
| michael@0 | 10 | #include "base/base_export.h" |
| michael@0 | 11 | #include "base/strings/string16.h" |
| michael@0 | 12 | |
| michael@0 | 13 | namespace base { |
| michael@0 | 14 | |
| michael@0 | 15 | // This class is a simple wrapper for string16 which also contains a null |
| michael@0 | 16 | // state. This should be used only where the difference between null and |
| michael@0 | 17 | // empty is meaningful. |
| michael@0 | 18 | class NullableString16 { |
| michael@0 | 19 | public: |
| michael@0 | 20 | NullableString16() : is_null_(true) { } |
| michael@0 | 21 | NullableString16(const string16& string, bool is_null) |
| michael@0 | 22 | : string_(string), is_null_(is_null) { |
| michael@0 | 23 | } |
| michael@0 | 24 | |
| michael@0 | 25 | const string16& string() const { return string_; } |
| michael@0 | 26 | bool is_null() const { return is_null_; } |
| michael@0 | 27 | |
| michael@0 | 28 | private: |
| michael@0 | 29 | string16 string_; |
| michael@0 | 30 | bool is_null_; |
| michael@0 | 31 | }; |
| michael@0 | 32 | |
| michael@0 | 33 | inline bool operator==(const NullableString16& a, const NullableString16& b) { |
| michael@0 | 34 | return a.is_null() == b.is_null() && a.string() == b.string(); |
| michael@0 | 35 | } |
| michael@0 | 36 | |
| michael@0 | 37 | inline bool operator!=(const NullableString16& a, const NullableString16& b) { |
| michael@0 | 38 | return !(a == b); |
| michael@0 | 39 | } |
| michael@0 | 40 | |
| michael@0 | 41 | BASE_EXPORT std::ostream& operator<<(std::ostream& out, |
| michael@0 | 42 | const NullableString16& value); |
| michael@0 | 43 | |
| michael@0 | 44 | } // namespace |
| michael@0 | 45 | |
| michael@0 | 46 | #endif // BASE_STRINGS_NULLABLE_STRING16_H_ |
