1  // Copyright 2010 Google LLC
 2  //
 3  // Redistribution and use in source and binary forms, with or without
 4  // modification, are permitted provided that the following conditions are
 5  // met:
 6  //
 7  //     * Redistributions of source code must retain the above copyright
 8  // notice, this list of conditions and the following disclaimer.
 9  //     * Redistributions in binary form must reproduce the above
10  // copyright notice, this list of conditions and the following disclaimer
11  // in the documentation and/or other materials provided with the
12  // distribution.
13  //     * Neither the name of Google LLC nor the names of its
14  // contributors may be used to endorse or promote products derived from
15  // this software without specific prior written permission.
16  //
17  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18  // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19  // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20  // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21  // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22  // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23  // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24  // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25  // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26  // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27  // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28  
29  // Include this file to use unordered_map and unordered_set.  If tr1
30  // or C++11 is not available, you can switch to using hash_set and
31  // hash_map by defining BP_USE_HASH_SET.
32  
33  #ifndef COMMON_UNORDERED_H_
34  #define COMMON_UNORDERED_H_
35  
36  #if defined(BP_USE_HASH_SET)
37  #include <hash_map>
38  #include <hash_set>
39  
40  // For hash<string>.
41  #include "util/hash/hash.h"
42  
43  template <class T, class U, class H = __gnu_cxx::hash<T> >
44  struct unordered_map : public __gnu_cxx::hash_map<T, U, H> {};
45  template <class T, class H = __gnu_cxx::hash<T> >
46  struct unordered_set : public __gnu_cxx::hash_set<T, H> {};
47  
48  #else
49  #include <unordered_map>
50  #include <unordered_set>
51  using std::unordered_map;
52  using std::unordered_set;
53  #endif
54  
55  #endif  // COMMON_UNORDERED_H_