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Member "mesa-20.1.8/include/no_extern_c.h" (16 Sep 2020, 2050 Bytes) of package /linux/misc/mesa-20.1.8.tar.xz:


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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