Re: Which exception it is?
"mos" <mmosquito@163.com> wrote in message
news:f5ippi$kd3$1@news.cn99.com...
Hi!
When call a null function pointer will cause a execption, but it can't
be caught as std::exception, then which exception it is?
The following code is a example:
typedef void (*testfunc)(int a);
void test()
{
testfunc func = NULL;
func(10);
iTest* p = NULL;
p->Test(10);
}
int main()
{
try
{
test();
}
catch(std::exception& x)
{
std::cout << "exception: " << x.what() << std::endl;
}
catch(...)
{
std::cout << "unknown" << std::endl;
}
return 0;
}
this is a windows-only feature.
I think it is a useful feature and I don't understand why it is not in the
standard.
Some UNIX gurus probably thought that their signal() implementation is the
best what can be achieved.
On Windows a structured exception will be thrown -- assuming you have
structured exceptions enabled in your compiler.
You can overload the type of exception thrown by setting a handler using the
_set_se_translator() function.
In this handler you would have to throw a C++ Exception yourself -- ideally
a different one for every different code.
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