Re: About exit4.c

[Pietrobon Marcello <teiffel at attglobal dot net>]

Even if it is not important It might be good to know about an other bug (probably) of the Microsoft compiler (which I
discovered trying to fix the problem with exit4.c):

The following code:
----------------------------------
#include <stdio.h>

class CheckDestructor
{
public:
 CheckDestructor() { printf("CheckDestructor"); };
 ~CheckDestructor() { printf("~CheckDestructor"); };
};

void f()
{
 CheckDestructor check;
 throw 1;
}

int main(int argc, char* argv[])
{
 //try
 //{
  f();
 //}
 //catch (...) {
 // printf("inside catch(...)\n");
 //}
 return 0;
}
----------------------------------

doens't call the destructor ~CheckDestructor().
But it does that if we put f() inside the try... catch block

The reason is that main() is called from crt0.c inside a __try ... __except block, which does not call the destructor.

This violates the Ansi C++ specification dec96: see
http://www.codeproject.com/cpp/ANSI-cpp-dec96/except.asp
where 15.2  Constructors and destructors                       [except.ctor].

Best Regards,
Marcello