49 lines
2.0 KiB
C++
49 lines
2.0 KiB
C++
/**************************************************************************
|
|
*
|
|
* Copyright 2014 VMware, Inc.
|
|
* All Rights Reserved.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included
|
|
* in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
|
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
|
|
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
|
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
|
* OTHER DEALINGS IN THE SOFTWARE.
|
|
*
|
|
**************************************************************************/
|
|
|
|
|
|
/*
|
|
* Including system's headers inside `extern "C" { ... }` is not safe, as system
|
|
* headers may have C++ code in them, and C++ code inside extern "C"
|
|
* leads to syntatically incorrect code.
|
|
*
|
|
* This is because putting code inside extern "C" won't make __cplusplus define
|
|
* go away, that is, the system header being included thinks is free to use C++
|
|
* as it sees fits.
|
|
*
|
|
* Including non-system headers inside extern "C" is not safe either, because
|
|
* non-system headers end up including system headers, hence fall in the above
|
|
* case too.
|
|
*
|
|
* Conclusion, includes inside extern "C" is simply not portable.
|
|
*
|
|
*
|
|
* This header helps surface these issues.
|
|
*/
|
|
|
|
#ifdef __cplusplus
|
|
template<class T> class _IncludeInsideExternCNotPortable;
|
|
#endif
|