INFO: Undocumented Warning C4509
ID: Q103242
The information in this article applies to:
- The Microsoft C/C++ Compiler (CL.EXE) included with: - Microsoft Visual C++, 32-bit Edition, versions 1.0, 2.0, 4.0
SUMMARY
The following warning was added to the Win32 beta SDK compiler and the Visual C++ 32-bit compiler version 1.0:
warning C4509: nonstandard extension used: '<function>' uses SEH and
'<variable>' has destructor
The warning was added in anticipation that C/C++ version 9.0 (included with Visual C++ 32-bit Edition, version 1.0) would support C++ exception handling (C++ EH). With the C/C++ compiler version 9.0, it is not possible to mix C++ EH and structured exception handling (SEH). Because destructors will involve C++ EH so that they can be called in an exception unwind, it will not be possible to have a local object in a function that uses SEH.
Currently, we do not destruct objects in an exception unwind.
MORE INFORMATION
This warning is not documented in Microsoft Visual C++, 32-bit Edition, versions 1.0, 2.x, or 4.0.
Code that produces the warning described above, where <function> is MyFunction and the variable is mc, resembles the following .CPP file:
// compile with /c /W3
struct MyClass {
public:
MyClass();
~MyClass();
};
void myfunc()
{
MyClass mc;
__try
{
//..
}
__finally
{
//..
}
}
Additional query words: 8.00 9.00
Keywords : kberrmsg Version : WINNT:1.0,2.0,2.1,4.0; Platform : NT WINDOWS Issue type : kbinfo
Last Reviewed: October 6, 1997
