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1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2006-2008 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 | 5 |
6 // | 6 // |
7 // Deal with the differences between Microsoft and GNU implemenations | 7 // Deal with the differences between Microsoft and GNU implemenations |
8 // of hash_map. Allows all platforms to use |base::hash_map| and | 8 // of hash_map. Allows all platforms to use |base::hash_map| and |
9 // |base::hash_set|. | 9 // |base::hash_set|. |
10 // eg: | 10 // eg: |
11 // base::hash_map<int> my_map; | 11 // base::hash_map<int> my_map; |
12 // base::hash_set<int> my_set; | 12 // base::hash_set<int> my_set; |
13 // | 13 // |
14 // NOTE: It is an explicit non-goal of this class to provide a generic hash | |
15 // function for pointers. If you to hash a pointers to a particular class, | |
darin (slow to review)
2009/09/03 05:23:11
nit: "If you _want_ to hash pointers..."
| |
16 // please define the template specialization elsewhere (for example, in its | |
17 // header file) and keep it specific to just pointers to that class. This is | |
18 // because identity hashes are not desirable for all types that might show up | |
19 // in containers as pointers. | |
14 | 20 |
15 #ifndef BASE_HASH_TABLES_H_ | 21 #ifndef BASE_HASH_TABLES_H_ |
16 #define BASE_HASH_TABLES_H_ | 22 #define BASE_HASH_TABLES_H_ |
17 | 23 |
18 #include "build/build_config.h" | 24 #include "build/build_config.h" |
19 | 25 |
20 #include "base/string16.h" | 26 #include "base/string16.h" |
21 | 27 |
22 #if defined(COMPILER_MSVC) | 28 #if defined(COMPILER_MSVC) |
23 #include <hash_map> | 29 #include <hash_map> |
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95 DEFINE_STRING_HASH(string16); | 101 DEFINE_STRING_HASH(string16); |
96 #endif // WCHAR_T_IS_UTF32 | 102 #endif // WCHAR_T_IS_UTF32 |
97 | 103 |
98 #undef DEFINE_STRING_HASH | 104 #undef DEFINE_STRING_HASH |
99 | 105 |
100 } // namespace __gnu_cxx | 106 } // namespace __gnu_cxx |
101 | 107 |
102 #endif // COMPILER | 108 #endif // COMPILER |
103 | 109 |
104 #endif // BASE_HASH_TABLES_H_ | 110 #endif // BASE_HASH_TABLES_H_ |
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