gmCoreGlobalDefs.h

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/************************************************************************
**
** Copyright (C) 2014 by Carlos Augusto Teixera Mendes
** All rights reserved.
**
** This file is part of the "GeMA" software. It's use should respect
** the terms in the license agreement that can be found together 
** with this source code.
** It is provided AS IS, with NO WARRANTY OF ANY KIND, 
** INCLUDING THE WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR 
** A PARTICULAR PURPOSE.
**
************************************************************************/
 
#ifndef _GEMA_CORE_GLOBALDEFS_H_
#define _GEMA_CORE_GLOBALDEFS_H_
 
 
/* In Visual Studio 2026, stdext::make_checked_array_iterator(x,y) and 
   stdext::make_unchecked_array_iterator(x) where removed from the runtime library.
   Apparently, these functions where deprecated since Visual Studio 2022 v17.8 
   (_MSC_VER >= 1938) and removed in newer versions of VS2026.
 
   Unfortunately, Qt 5 defines the macros QT_MAKE_CHECKED_ARRAY_ITERATOR() and 
   QT_MAKE_UNCHECKED_ARRAY_ITERATOR() in the file QtCore/qcompilerdetection.h, using 
   the removed functions, and without any guards. Those macros are then referenced 
   from several Qt headers, creating compiler errors in newer versions of VS2026. 
   In Qt 6 with _MSC_VER >= 1938, and for other compilers different from MSVC, those 
   macros are always empty.
 
   A discussion of this problem can be found at https://github.com/o3de/o3de/issues/19754
 
   One proposed solution on that thread is to force the include of <QtCore/qcompilerdetection.h> 
   and immediately redefine the macros, but that seems to be unsafe since we are NOT recompiling 
   Qt, and the application and the library will end up with different definitions for the macro.
 
   What we do instead is to define identity implementations for make_checked_array_iterator() 
   and make_unchecked_array_iterator() when compiling with VS2026.
*/ 
#if _MSC_VER >= 1950  // VS2026 initial version or later
  
namespace stdext
{
  template <class Ptr> 
  Ptr make_checked_array_iterator(const Ptr p, size_t ) { return p; }
 
  template <class Ptr> 
  Ptr make_unchecked_array_iterator(const Ptr p) { return p; }
}
 
#endif
 
#endif