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1 /**************************************************************************
2  *
3  * Copyright 2014 VMware, Inc.
4  * All Rights Reserved.
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a
7  * copy of this software and associated documentation files (the "Software"),
8  * to deal in the Software without restriction, including without limitation
9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10  * and/or sell copies of the Software, and to permit persons to whom the
11  * Software is furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included
14  * in all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22  * OTHER DEALINGS IN THE SOFTWARE.
23  *
24  **************************************************************************/
25 
26 
27 /*
28  * Including system's headers inside `extern "C" { ... }` is not safe, as system
29  * headers may have C++ code in them, and C++ code inside extern "C"
30  * leads to syntatically incorrect code.
31  *
32  * This is because putting code inside extern "C" won't make __cplusplus define
33  * go away, that is, the system header being included thinks is free to use C++
34  * as it sees fits.
35  *
36  * Including non-system headers inside extern "C"  is not safe either, because
37  * non-system headers end up including system headers, hence fall in the above
38  * case too.
39  *
40  * Conclusion, includes inside extern "C" is simply not portable.
41  *
42  *
43  * This header helps surface these issues.
44  */
45 
46 #ifdef __cplusplus
47 template<class T> class _IncludeInsideExternCNotPortable;
48 #endif
49