I've got a class called Regex wich is an subclass of the interface Automate. In some function I have a parameter which takes an automate.

public void fromAutomate(in Automate from)
{
Regex ex = (Regex)from;
}

I am sure this is a Regex because running the interface methods work as expected. However, casting the Automate to the regex causes an access violation.

Please help,
Johnny

I think you should reduce this to a minimum self-contained example which compiles and fails in this manner (up to 20 lines of code) and try to post it with a [bug] in subject line. Walter needs such to find bugs and maintain a set of tests.

Else i don't see what would be causing it.

-eye

Johnny schrieb:
> I've got a class called Regex wich is an subclass of the interface Automate. In
> some function I have a parameter which takes an automate.
> 
> public void fromAutomate(in Automate from)
> {
> Regex ex = (Regex)from;
> }
> 
> I am sure this is a Regex because running the interface methods work as
> expected. However, casting the Automate to the regex causes an access violation.
> 
> Please help,
> Johnny
> 
> 

public interface Automate {}

public class NDFA : public Automate {
public void fromAutomate(in Automate from) {
printf("%d\n", (Regex)from);
}
}

public class Regex: public Automate {}

int main() {
Regex regex = new Regex();
NDFA ndfa = new NDFA();
ndfa.fromAutomate(regex);
return 0;
}

and all he prints is a 0

In article <c3c42t$1fg$1@digitaldaemon.com>, Ilya Minkov says...
>
>I think you should reduce this to a minimum self-contained example which compiles and fails in this manner (up to 20 lines of code) and try to post it with a [bug] in subject line. Walter needs such to find bugs and maintain a set of tests.
>
>Else i don't see what would be causing it.
>
>-eye
>
>Johnny schrieb:
>> I've got a class called Regex wich is an subclass of the interface Automate. In some function I have a parameter which takes an automate.
>> 
>> public void fromAutomate(in Automate from)
>> {
>> Regex ex = (Regex)from;
>> }
>> 
>> I am sure this is a Regex because running the interface methods work as expected. However, casting the Automate to the regex causes an access violation.
>> 
>> Please help,
>> Johnny
>> 
>>