blob: f79602c0303d62614eae7bf6c7398635092c5d73 [file] [log] [blame]
José Fonsecabfb4db82014-12-11 22:14:14 +00001/**************************************************************************
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
47template<class T> class _IncludeInsideExternCNotPortable;
48#endif