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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 // This file specifies a recursive data storage class called Value intended for | 5 // This file specifies a recursive data storage class called Value intended for |
| 6 // storing settings and other persistable data. | 6 // storing settings and other persistable data. |
| 7 // | 7 // |
| 8 // A Value represents something that can be stored in JSON or passed to/from | 8 // A Value represents something that can be stored in JSON or passed to/from |
| 9 // JavaScript. As such, it is NOT a generalized variant type, since only the | 9 // JavaScript. As such, it is NOT a generalized variant type, since only the |
| 10 // types supported by JavaScript/JSON are supported. | 10 // types supported by JavaScript/JSON are supported. |
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| 141 // If the current object can be converted into the given type, the value is | 141 // If the current object can be converted into the given type, the value is |
| 142 // returned through the |out_value| parameter and true is returned; | 142 // returned through the |out_value| parameter and true is returned; |
| 143 // otherwise, false is returned and |out_value| is unchanged. | 143 // otherwise, false is returned and |out_value| is unchanged. |
| 144 bool GetAsBoolean(bool* out_value) const; | 144 bool GetAsBoolean(bool* out_value) const; |
| 145 bool GetAsInteger(int* out_value) const; | 145 bool GetAsInteger(int* out_value) const; |
| 146 bool GetAsDouble(double* out_value) const; | 146 bool GetAsDouble(double* out_value) const; |
| 147 bool GetAsString(std::string* out_value) const; | 147 bool GetAsString(std::string* out_value) const; |
| 148 bool GetAsString(string16* out_value) const; | 148 bool GetAsString(string16* out_value) const; |
| 149 bool GetAsString(const Value** out_value) const; | 149 bool GetAsString(const Value** out_value) const; |
| 150 bool GetAsString(StringPiece* out_value) const; | 150 bool GetAsString(StringPiece* out_value) const; |
| 151 bool GetAsBinary(const Value** out_value) const; | |
| 152 // ListValue::From is the equivalent for std::unique_ptr conversions. | 151 // ListValue::From is the equivalent for std::unique_ptr conversions. |
| 153 bool GetAsList(ListValue** out_value); | 152 bool GetAsList(ListValue** out_value); |
| 154 bool GetAsList(const ListValue** out_value) const; | 153 bool GetAsList(const ListValue** out_value) const; |
| 155 // DictionaryValue::From is the equivalent for std::unique_ptr conversions. | 154 // DictionaryValue::From is the equivalent for std::unique_ptr conversions. |
| 156 bool GetAsDictionary(DictionaryValue** out_value); | 155 bool GetAsDictionary(DictionaryValue** out_value); |
| 157 bool GetAsDictionary(const DictionaryValue** out_value) const; | 156 bool GetAsDictionary(const DictionaryValue** out_value) const; |
| 158 // Note: Do not add more types. See the file-level comment above for why. | 157 // Note: Do not add more types. See the file-level comment above for why. |
| 159 | 158 |
| 160 // This creates a deep copy of the entire Value tree, and returns a pointer | 159 // This creates a deep copy of the entire Value tree, and returns a pointer |
| 161 // to the copy. The caller gets ownership of the copy, of course. | 160 // to the copy. The caller gets ownership of the copy, of course. |
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| 535 return out << static_cast<const Value&>(value); | 534 return out << static_cast<const Value&>(value); |
| 536 } | 535 } |
| 537 | 536 |
| 538 // Stream operator so that enum class Types can be used in log statements. | 537 // Stream operator so that enum class Types can be used in log statements. |
| 539 BASE_EXPORT std::ostream& operator<<(std::ostream& out, | 538 BASE_EXPORT std::ostream& operator<<(std::ostream& out, |
| 540 const Value::Type& type); | 539 const Value::Type& type); |
| 541 | 540 |
| 542 } // namespace base | 541 } // namespace base |
| 543 | 542 |
| 544 #endif // BASE_VALUES_H_ | 543 #endif // BASE_VALUES_H_ |
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