MongoDB C++ Driver  legacy-1.1.2
unordered_set.h
1 /* Copyright 2012 10gen Inc.
2  *
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #pragma once
17 
18 // We need to drag in a C++ header so we can examine __GXX_EXPERIMENTAL_CXX0X__ or
19 // _LIBCPP_VERSION meaningfully. The <new> header is pretty lightweight, mostly unavoidable,
20 // and almost certain to bring in the standard library configuration macros.
21 #include <new>
22 
23 // NOTE(acm): Before gcc-4.7, __cplusplus is always defined to be 1, so we can't reliably
24 // detect C++11 support by exclusively checking the value of __cplusplus. Additionaly, libc++,
25 // whether in C++11 or C++03 mode, doesn't use TR1 and drops things into std instead.
26 #if __cplusplus >= 201103L || defined(__GXX_EXPERIMENTAL_CXX0X__) || defined(_LIBCPP_VERSION)
27 
28 #include <unordered_set>
29 
30 namespace mongo {
31 
32 using std::unordered_set;
33 
34 } // namespace mongo
35 
36 #elif defined(_MSC_VER) && _MSC_VER >= 1500
37 
38 #include <unordered_set>
39 
40 namespace mongo {
41 
42 #if _MSC_VER >= 1600 /* Visual Studio 2010+ */
43 using std::unordered_set;
44 #else
45 using std::tr1::unordered_set;
46 #endif
47 
48 } // namespace mongo
49 
50 #elif defined(__GNUC__)
51 
52 #include <tr1/unordered_set>
53 
54 namespace mongo {
55 
56 using std::tr1::unordered_set;
57 
58 } // namespace mongo
59 
60 #else
61 #error "Compiler's standard library does not provide a C++ unordered_set implementation."
62 #endif
Utility functions for parsing numbers from strings.
Definition: compare_numbers.h:20