blob: b47c3ae10bf04275294d5cfa9ac7806314b160e5 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
/* Copyright 2012 10gen Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
// We need to drag in a C++ header so we can examine __GXX_EXPERIMENTAL_CXX0X__ or
// _LIBCPP_VERSION meaningfully. The <new> header is pretty lightweight, mostly unavoidable,
// and almost certain to bring in the standard library configuration macros.
#include <new>
// NOTE(acm): Before gcc-4.7, __cplusplus is always defined to be 1, so we can't reliably
// detect C++11 support by exclusively checking the value of __cplusplus. Additionaly, libc++,
// whether in C++11 or C++03 mode, doesn't use TR1 and drops things into std instead.
#if __cplusplus >= 201103L || defined(__GXX_EXPERIMENTAL_CXX0X__) || defined(_LIBCPP_VERSION)
#include <unordered_set>
namespace mongo {
using std::unordered_set;
} // namespace mongo
#elif defined(_MSC_VER) && _MSC_VER >= 1500
#include <unordered_set>
namespace mongo {
#if _MSC_VER >= 1600 /* Visual Studio 2010+ */
using std::unordered_set;
#else
using std::tr1::unordered_set;
#endif
} // namespace mongo
#elif defined(__GNUC__)
#include <tr1/unordered_set>
namespace mongo {
using std::tr1::unordered_set;
} // namespace mongo
#else
#error "Compiler's standard library does not provide a C++ unordered_set implementation."
#endif
|
