Hey,

lets say I have something like the following:

try {
	// Code that throws some exception I don't know of.
} catch (Exception ex) {
	writefln(ex.classinfo.name); // works but it's not what I need
}

Is there some way to get the name of the class 'ex' is instance of (the derived class and not the base class)?

Thanks in advance,
--
Tom;

Tom wrote:
> Hey,
> 
> lets say I have something like the following:
> 
> try {
>     // Code that throws some exception I don't know of.
> } catch (Exception ex) {
>     writefln(ex.classinfo.name); // works but it's not what I need
> }
> 
> Is there some way to get the name of the class 'ex' is instance of (the derived class and not the base class)?

I'm sorry, but what *is* it that you need if not the above?

    import std.stdio;

    class DerivedException : Exception { this() { super(""); } }

    void main() {
        try {
            // Code that throws some exception.
            throw new DerivedException;
        } catch (Exception ex) {
            writefln(ex.classinfo.name); // writes "DerivedException"
        }
    }

The above code writes "DerivedException" to stdout, which is the name of the most derived class ex is an instance of.

Am I missing something?

== Quote from Frits van Bommel (fvbommel@REMwOVExCAPSs.nl)'s article
> Tom wrote:
> > Hey,
> >
> > lets say I have something like the following:
> >
> > try {
> >     // Code that throws some exception I don't know of.
> > } catch (Exception ex) {
> >     writefln(ex.classinfo.name); // works but it's not what I need
> > }
> >
> > Is there some way to get the name of the class 'ex' is instance of (the derived class and not the base class)?
> I'm sorry, but what *is* it that you need if not the above?
>      import std.stdio;
>      class DerivedException : Exception { this() { super(""); } }
>      void main() {
>          try {
>              // Code that throws some exception.
>              throw new DerivedException;
>          } catch (Exception ex) {
>              writefln(ex.classinfo.name); // writes "DerivedException"
>          }
>      }
> The above code writes "DerivedException" to stdout, which is the name of
> the most derived class ex is an instance of.
> Am I missing something?

No, you're right. It works here, on a WinXP machine. When I get home later, I'll test it on my Linux, where it didn't work. I hope it's only my mistake and not a linux-specific bug.

Regards,
--
Tom;

Tom wrote:
> == Quote from Frits van Bommel (fvbommel@REMwOVExCAPSs.nl)'s article
[...]
>> The above code writes "DerivedException" to stdout, which is the name of
>> the most derived class ex is an instance of.
>> Am I missing something?
> 
> No, you're right. It works here, on a WinXP machine. When I get home later, I'll
> test it on my Linux, where it didn't work. I hope it's only my mistake and not a
> linux-specific bug.

Just tried it in my VMWare window:

    urxae@ubuntu:~/tmp$ cat test.d
    import std.stdio;

    class DerivedException : Exception { this() { super(""); } }

    void main() {
        try {
            // Code that throws some exception.
            throw new DerivedException;
        } catch (Exception ex) {
            writefln(ex.classinfo.name); // writes "DerivedException"
        }
    }
    urxae@ubuntu:~/tmp$ dmd -run test.d
    DerivedException
    urxae@ubuntu:~/tmp$ uname -a
    Linux ubuntu 2.6.17-10-386 #2 Fri Oct 13 18:41:40 UTC 2006 i686 GNU/Linux

So that's not it either.

Frits van Bommel wrote:
> Tom wrote:
>> == Quote from Frits van Bommel (fvbommel@REMwOVExCAPSs.nl)'s article
> [...]
>>> The above code writes "DerivedException" to stdout, which is the name of
>>> the most derived class ex is an instance of.
>>> Am I missing something?
>>
>> No, you're right. It works here, on a WinXP machine. When I get home later, I'll
>> test it on my Linux, where it didn't work. I hope it's only my mistake and not a
>> linux-specific bug.
> 
> Just tried it in my VMWare window:
> 
>     urxae@ubuntu:~/tmp$ cat test.d
>     import std.stdio;
> 
>     class DerivedException : Exception { this() { super(""); } }
> 
>     void main() {
>         try {
>             // Code that throws some exception.
>             throw new DerivedException;
>         } catch (Exception ex) {
>             writefln(ex.classinfo.name); // writes "DerivedException"
>         }
>     }
>     urxae@ubuntu:~/tmp$ dmd -run test.d
>     DerivedException
>     urxae@ubuntu:~/tmp$ uname -a
>     Linux ubuntu 2.6.17-10-386 #2 Fri Oct 13 18:41:40 UTC 2006 i686 GNU/Linux
> 
> So that's not it either.

Shit! the same here. I could swear that yesterday I had code that failed to perform correctly on the topic. Today I can't reproduce it, shame on me (maybe I'm hallucinating). It'll have to be next time (hope not) :(

Thanks anyway!
--
Tom;